INDICE CONTENIDOS ERICSSON REVIEW EDICION INGLESA Se han recopilado aquí los índices de los contenidos de cada volumen anual de la revista de Ericsson del periodo 1924 a 1955. Todas las revistas las podéis descargar de la web de Ericsson en la dirección : https://www.ericsson.com/en/about-us/history/sources/lme-review Algunos ejemplares originales están en sueco. ED 2.0. AÑOS 1924 A 1953 “Historias de la Telefonía en España”, historiatelefonia.com JRI, Febrero 2021 Página de 1 51
Transcript
INDICE CONTENIDOS ERICSSON REVIEW EDICION INGLESA
Se han recopilado aquí los índices de los contenidos de cada volumen anual de la revista de Ericsson del periodo 1924 a 1955.
Todas las revistas las podéis descargar de la web de Ericsson en la dirección :
Vol. I. 1924. CONTENTS Announcement 2 Growth and Present Development of the L. M. Ericsson Organization. I, 3 The L. M. Ericsson Automatic Switching System with 500-line Selectors, 6Development of the L. M. Ericsson Telephone Plant in Mexico, 16Readable Type of Calling Device for Automatic Telephone Systems,17 L. M. Ericsson at the Gothenburg Exhibition 1923, 18 The Ericsson Automatic in Rotterdam, 22New Telephone Plant in Verona, 23 New Telephones in Tangier, 24 Present Development of the L. M. Ericsson Organization. II, 26 The Hamar Full Automatic Telephone Exchange, 28 Time Recording Systems, 31 The Nassjo Electric Interlocking Plant ,36 The Handmicrotelephone. Pictures and Rhymes, 41Typical Manual Telephone Exchanges (Abo, Finland), 45Household Tariff Meters, 50 Calculation of the Required Number of Switches for Automatic Telephone Exchanges, 57 The Compafiia Entrerriana de Telefonos in the Argentine, 69 Automatic Telephone Exchange in San Sebastian, 72 Amplifiers for Wire Telephony, 74 The Ericsson Automatic Telephone System. Description of Circuits, 84 The Automatic Telephone Exchange in Christiansund, Norway, 95 The Shanghai Automatic Exchange, 98 Standards for Transmitters and Receivers, 108Traffic Regulating Signals at the Stockholm Lock, 111 Preservation and Maintenance of Wooden Telephone Poles, 113 Telephone Conditions in the Dutch East Indies, 123 The Patent Controversy Automatic Electric Co. versus L. M. Ericsson, 133 Ordering Taxicabs by Telephone, 135 New Telephone Exchanges in the Orient and China, 142 Some Facts about Colombia and the Bogota Exhibition 1923, 14
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Vol. II. 1925. CONTENTS
The Ericsson system for Distribution of Telephone Cables, 2 Automatic Switching for Private Telephone Exchanges, 8 L. M. Ericsson obtains Concession in Italy, 18 The Ericsson Water-tight Microphone Capsule, 19 Some Facts about the Telephone Plant in Tangier, 21 Automatic Voting, 26 The Calcutta Telephone Exchanges, 34 The Madrid Exhibition of Telephone and Kindred Appliances, 37 The New Poland. An Economic Survey 38 Swedish Telephone Activities in Poland, 44 The Ericsson Cable Works at Alvsjo, Stockholm, 47 Modernization of Plants operated by The Polish Telephone Company, 50 Underground Cable Construction with Cement Conduits, 58 The Electric Interlocking Plant at the »Boros Lower» Station, 65 New Automatic Equipment for Stockholm and Gothenburg, 69 Secret Intercommunication System with Key Switching, 70 The Verona Telephone Plant, 74 The Special Service Bureau for the »Rikstelefon» Exchanges in Stockholm, 79 The Ericsson Fire-Alarm System. I. With Generator Signalling, 86 Notes of Interest Concerning some of L. M. Ericsson's earlier Types of Telephone Equipment: The Hand Micro-Telephone,92 Torsten af Geijerstam, in memoriam, 98 A few Illustrations from the Works of The British L. M. Ericsson Mfg. Co, 99 List of Ericsson Automatic Telephone Exchanges, Working and under Construction, 103 A Talk on Telephone Directories, 104 Junction Traffic between Automatic and Manual Exchanges, 123 The Ericsson Fire-AIarm System. II. With Morse Telegraphic Signalling, 134
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Vol. III. 1926. CONTENTS.
I. Biographical data. Lars Magnus Ericsson. In Memoriam Nos. 9 to 12, Page 104 Martin Lofgren. In Memoriam 9 to 12, 128 Anton Ryberg. In Memoriam > 7 & 8, 77 Eric Vallin, 50 Years » 9 to 12, » 128
II. Articles.
Automatic Exchanges. Description of the New Ericsson Automatic Exchanges in San Sebastian and Vicinity ... 7 & 8, 93 Fire Alarm. The L. M. Ericsson Fire Alarm System. II. With Morse Telegraphic Signalling (cont. from Nos. 11 & 12, 1925) > 1 & 2, 10 Toll Traffic Exchanges. The New Toll Traffic Exchange in Rotterdam 9 to 12, 120
Railway Signalling. The New Interlocking Plant in Malmoe » 1 & 2, » 2 » » » » in Flen 9 to 12, » 138 Metals and Shop Practice. Magnet Steel for Telephone Purposes » 5 & 6, » 61
Wireless. On Various Principles of Receiver and Loud-Speaker Design 7 & 8, > 83
Telephony. The Toll Traffic Problem in Europe with Special Reference to the Organization of the Service 5 & 6, » 54 D:o, (continued) 7 & 8, 78 D:o, (conclusion) » 9 to 12, 111 The Empresa de Telefonos Ericsson, S. A., Mexico. Some Facts Concerning the Activities of L. M. Ericsson's Mexican Subsidiary » 3 & 4, » 28 Selling Fish over the Phone » 3 & 4, » 39 Telephone Communications in Italy » 9 to 12, » 129 - 143
III. General Notes.
Automatic Exchanges: Mexico Nos. 7&8, 1, suppl. Moscow »»>>, » Rostoff » 5&6, » 74 S.Sebastian » » 50 List of Ericsson Automatic Telephone Exchanges, Working and under Construction » » 73 Verona » 7&8, 1, suppl.
Private Automatic Exchanges: Table of Ericsson Private Automatic Exchanges in Service and under Construction September 30, 1926 » » 6, Toll Exchanges: Budapest » » » 2, » Rotterdam » 5 & 6, » 67
Railway Signalling: The Electric Interlocking Plant at Hassleholm on the Swedish State Railways >, 7&8, » 3, suppl. New Interlocking Plant for the Danish State Railways » 5 & 6, » 74 C. B.
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Exchanges: Chile , 3&4, » 46
Wireless: The Exhibition of The Society of Swedish Radio Interests 1926. >» 7 & 8, » 2, suppl.
Telephone Concessions: Concession for Toll Traffic in Mexico » 3&4, > 46 Telephone Concession in Smyrna » 7 & 8, > 3 suppl.
Exhibitions: The L. M. Ericsson Display Room in the Ericsson Tower Building, Stockholm » 3&4, >• 26
Correspondence: Notes of interest from Chile > 3 & 4, » 43
Literature: Los Sistemas Modernos de Telefonia Automatica, by Ignacio M:a Echaide 7 & 8, > 3, suppl. La Telefonia Automatica en Ouipuzcoa, by Ignacio M:a Echaide... » » » Small and Medium-Sized Taxicab Telephone Exchanges, by Helge Ericsson >, » » 4
Miscellaneous: Taxicab Exchanges in Milan » » , in Wellington, New Zealand » »
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Vol. IV, 1927.CONTENTS.
I. Biographical data. P e r Edvar d Allven 50 years 4 to 6, 32Constanc e Andersso n 60 years 1 to 3, 21T h e Burial of Erik O. Sandber g 7 to 9, 81Gustav Wettermar k 50 years 4 to 6, 32E. G. Windah l 50 years 4 to 6, 32
Obituary.Patrick Walter d'Alton 4 to 6, 30Carl Johan Andersson 7 to 9, 78G. d’Aulnis de Bourouill 4 to 6, 31S. Grodzki 10 to 12, 116A. Van Minden 10 to 12, 116Erik Oskar Sandberg 7 to 9, 79L. Spcerhase 10 to 12, 115Ir P. de Vries D. zn 4 to 6, 31
II. Articles .
Automatic Exchanges.The Automatic Exchange in Forli, Italy 1 to 3, 12Swedish Telephones in Angor a 1 to 3, 5The L. M. Ericsson Automatic Telephone System. Experiences from the Stockholm telephone net concerning the efficiency and maintenance of the system 7 to 9, 82
Miscellaneous.The Automatic Voting Device of the Finnish Parliament 10 to 12, 147The International Exhibition in Como 10 to 12, 114
Field Telephone Technic.Field Telephone Switches and Switchboards. Various principles of construction 4 to 6, 51Field Telephone Switchboard for Buzzer and Magneto Signals 7 to 9, 79
Railway Signalling.The Hassleholm Electric Interlocking Plant 1 to 3, 14Automatic Section Blocking on the Line Stockholm Ostra—Stocksund 4 to 6, 41Electric Light Signal Installation for the Electric Railwa y Stockholm—Djursholm 4 to 6, 49The Skovde and Herrljunga Interlocking Plants 7 to 9, 87Interlocking Plant at the Trac k Junction East of the Toru p Station 10 to 12, 140
Private Intercommunication Installations.Local Telephon e Installations with Pus h Button Intercommunication TelephoneInstruments 7 to 9, 99
Wireless. On Various Principles of Receiver and Loud-Speaker Design II 4 to 6, 34
Outside Plant.Projecting City Telephone Nets. According to the Ericsson System of CableDistribution 7 to 9, 105
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National and International Toll Service.American and European Toll Traffic 1 to 3, 22The International Chamber of Commerce and the International European Telephone Traffic 10 to 12, 143Person to Person Long Distance Calls 10 to 12, 117
Design.Dial Type of Impulse Transmitters 1 to 3, 26
Time Control.Time Control and Efficiency 7 to 9, 94
Theoretical.General Theory on Homogeneous Parallel Lines 10 to 12, 123
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Vol. V, 1928.CONTENTS.
I. Biographical data.
Obituary.Carl Edward Nilsson † 4 to 6, 42
II. Articles .
Automatic Telephony.Making Register Connections by Means of Cord Circuit Finders 1 to 3, 19On Junction Telephone Traffic Automatic to Automatic, or Manual to Automatic7 to 9, 83
Design.On Subscribers' Meters 7 to 9, 109
Electrical Meiers.Subtraction Meter with Load Balancing Switch 7 to 9, 78
Fire protection.Fire Protection in Industrial Life 10 to 12, 149On Forest Fires and Forest Fire Protection 7 to 9, 101The Automatic Fire Alarm 10 to 12, 147
Industrial Organization.Annunciator System for Hotels, Hospitals, Sanatorium and Similar Establishments 10 to 12, 118Low Tension Installations in a Modern Industrial Plant 10 to 12, 125Time Recording 1 to 3, 24
Outside Plant.Telephone Poles of reinforced Concrete 4 to 6, 65
Railway Signalling. Automatic Warning Signals at the Railway Crossing near the Henriksdalstation on the Stockholm—Saltsjon Railway 7 to 9, 114Some Hints on Track Circuit Calculation 4 to 6, 69The smallest electric interlocking machine 4 to 6, 63
Telephony.Call Order Service at the Stockholm Toll Exchange 1 to 3, 14During what Length of Time and with how Large a Capacity shall a ManualExchange be Retained in an Otherwise Automatic Telephone Net 1 to 3, 30Suburban Telephone Traffic in a Large City 1 to 3, 5The Telephone as an Aid in the Organization of the Taxicab Service inlarge Cities 4 to 6, 43
Theoretical.On Cross-Talk, and other Problems of a Kindred Nature 10 to 12, 129
Wireless.The Swedish Radio Company 4 to 6, 54
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Vol. VI, 1929.CONTENTS .
Fire Protection. The Value of the Automatic Fire Alarm 7 to 9, 99
Historical.
Activities of Max Sieverts Fabriks A.-B 1 to 3, 5Developments in the Manufacture of Lead Sheathed Cable by Max SievertsFabriks Aktieholag at Sundbyberg, Sweden, from 1910 to 1928 1 to 3, 10Electrotechnical Propaganda Courses in Sweden 1925 to 1927 1 to 3, 28The Patent Controversy 1 to 3, 16
Operation.Comparison between Manual and Automatic Telephone Service 7 to 9, 91
Plant Construction.H i g h T e n s i o n.High Tension Condenser for Compensating Reactive Effect in AlternatingCurrent Nets 1 to 3, 18
Low Ten s i o n.Electrolysis in Underground Cables 4 to 6, 41Do. cont 7 to 9, 107New Swedish Carrier Current Telephone and Telegraph Systems on TelephoneLines 10 to 12, 145
Railway Signalling.Electric Interlocking Plant at the Passenger Station in Revel (Tallinn) ... 10 to 12, 136Ericsson Interlocking and Railway Signalling Equipment at the BarcelonaExhibition 1929 4 to 6, 77New Interlocking Plants in Linkoeping and Mjoelby 4 to 6, 61
Shop Practice.Time Recording as an Aid in Estimating Cost of Production 7 to 9, 89
Telephony.Automatic Telephony.The Continued Automatization ol the Stockholm Telephone Net 4 to 6, 34Calculation of the Required Number of Switches with Consideration forthe Value of the Subscriber's Time 1 to 3, 31
Description of Telephone Exchanget.The Lemberg (Poland) Telephone Exchange I to 3, 26Modern Manual Exchanges 1 to 3, 22
Theoretical.Induction in a System of Parallel Lines 7 to 9, 80The influence of Condensers on the Functioning of Relays with Respectto the Periodic Case 10 to 12, 163
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Vol. VII. 1930.CONTENTS .
Biographical data.Karl Fredrik Wincrantz 7 to 12, 98
Fire Protection.Practical Points about Automatic Fire Alarm 7 to 12, 126
Metering Devices.Impedance and Impedance Measurements as well as a Description of the Impedance Measuring Set Manufactured by Svenska Radioaktiebolaget 7 to 12, 143Instrument for Grouping Fifteen-minutes Loads in order of their Magnitude ... 1 to 6, 60Localisation of Line Faults with the Resistance and Capacity Bridge constructedby the Svenska Radioaktiebolaget 1 to 6, 69New Swedish Electricity Meters 1 to 6, 86The Svenska Radioaktiebolaget Valve-testing Set 7 to 12, 174
Miscellaneous.Use of Electricity in Modern Life 1 to 6, 48
Plant Construction.High Tension.Lead Covered Rubber Cable Installations 7 to 12, 20Porcelain Insulators and Insulator Porcelain 7 to 12, 167Static Condensers for the Improvement of the Effect Factor in A. C. nets 1 to 6, 33
Low Tension.New Swedish Carrier Current Telephone and Telegraph Systems on TelephoneLines 1 to 6, 23
Railway Signalling.Electric Interlocking Plant at Vanneboda Station 7 to 12, 164Hallsberg Electric Interlocking Signal Plant 7 to 12, 105Interlocking and Signal Plant at Lund 7 to 12, 137
Telephony.Calculation of Delays in an Automatic Telephone System 7 to 12, 185Organized Service for Information as to Subscribers' Numbers in Large Telephone Exchanges 1 to 6, 5Suburban Telephone Traffic 1 to 6, 16Use of Personal Telephone Calls in Sweden, and in Traffic between Swedenand other Countries 7 to 12, 102Working Reliability and Maintenance of the L. M. Ericsson Automatic TelephoneSystem 7 to 12, 201
Theoretical.Cross-talk between Telephone Lines 7 to 12, 112
Wireless.The Svenska Radioaktiebolaget Audio-Frequency Generator, with ContinouslyVariable Frequency Adjustment 7 to 12, 99
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Vol. VIII 1931CONTENTS-
No. 1—3 1931Professor H. Pleijel: General Theory of Dis- turbances in Communication Lines, Caused by Power Lines Page 5 Bernhard Ell: Today's Knowledge of High-Tension Cables and Fittings Page 10 E. G. Windahl: Electric Locking Frame with All-Electric Interlocking Gear Page 19Bernhard Ell: The Action of Temperature Variations on Insulated Cables and Appurtenant Fittings Page 33Totalisator for Fully Mechanised Racecourses Page 42A Private Automatic Branch Exchange Equipped With L. M. Ericsson 500-line Selectors . Page 54Torbern Laurent: The Swedish Voice Frequency Signalling System Page 64
No. 4—6 1931The Alpha Company Page 83E. Nylund: Notes on the Design and Use of Bakelite Parts for Insulating Purposes. Page 85K. Nilsson: The Alpha Testing Machines Page 92A. Franchi: Bakelite and its Uses. Page 101Svenska Radioaktiebolaget: The Use of Ther- mionic Valves for Generating Multiple Frequencies Page 107Torsten A. Lundell: A Review of certain new designs of long distance telephony equipment and measuring instruments Page 111A. Lignell: The Stockholm Trunk Exchange Page 143
No. 7—9 1931H. Pleijel: A method of computing the attenuationin a band pass filter arbitrarily composedof resistances, inductances, capacities and transformers Page 164Ture Hard: Constant Current Instead of Constant Voltage at the Track Transformer in an A. C.Track Circuit Page 172G. Swedenborg: Investigations regarding- mutual induction in parallel conductors earthed at the ends Page 189 E. Olson: Laying and Fitting of Lead-sheathed Cables Page 205 I. I:son Svedberg: On Transmission Levels and Level Measurements in Long Distance Telephone Lines Page 214
No. 10—12 1931In memoriam K. F. Wincrantz . . . Page 229 Anna Beckmann: Michael Faraday, the Founder of Electrotechnics. A Centenary Page 230 Torbern Laurent: The Ericsson Standard TwoWire Repeater Page 241 E. Herlin: Thomas Alva Edison. . . Page 267 E. O. Windahl: Electrical Point Machine with Incorporated Point Lock Page 270 M. Vos: Comite Consultatif International des Communications Telephoniques a Grande Distance C.C.I. Plenary Session in Paris 1931 Page 271 A. Liqnell and A. Holmgren: Technical and Traffic Questions at the CCI:s Plenary Meeting in Paris 1931 Page 276 H. Pleijel and S. Kruse: The Attenuation at a Double Point in a Band pass Filter. . . Page 297 A. Lignell: 50 Years' Progress in Telephony Page 301
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Vol. IX 1932CONTENTS-
No. 1—3 1932A. Lignell: The Stockholm "Formedlings" Bureau Page 1H. Sterky: Simplified Methods of Designing Electric Wave Filters and a Contribution to the Theory of Matching Filter Quadripoles Page 6Hugo Blomberg: Method of Installation of Subscriber's automatic Telephoneswhen Changing over from LB to the Automatic System Page 42Sten Velander: Possibilities and Tendencies of Power Transmission Page 44F. Johansson: Forest Telephone Lines. —Some Points in their Design Page 62T. Husberg: Present Tendencies in Electrical Wiring Methods Page 6 9Ivar Billing: The Railway Telephone Cable in the Electrified Malmo Lines .Page 80Elektromekano : The Elektromekano Copper Rolling Mill Page 97
No. 4—6 1932T. Hard: Some Details of the new Electric Signalling Plant at Gothenburg Central Station: its Design, Installation, and Use Page 101H. Pleyel: Reduction to a Constant of a Variable E.M.F. with the Assistance of the Heaviside Operator Calculus. . . Page 131H. Pleijel: A General Method for Determining Oscillations in a Network with Small Losses Page 138A. Lignell: Working Reliability and Maintenance in the L. M. Ericsson AutomaticTelephone System Page 149Telephone Exchanges on the L. M. Ericsson Automatic System Page 162H. Pleijel: A Theorem of Reciprocity in Wireless Telegraphy Page 164E. Lofgren: Elimination of Hum in Mains-operated Radio Receivers by Means of Compensation Methods ... . Page 171
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Vol. X 1933CONTENTS-
Telephone Operation. World Telephone Statistics 36 The Subscriber's Multiple and Other Multiples in the Ericsson Automatic Telephone System ... . 49Reliability and Maintenance Cost of the Automatic Telephone Exchanges of Stockholm during 1932 87 The Ericsson Automatic Telephone System 10 years n o Traffic Supervision and Maintenance of the »Söder» Automatic Exchange in Stockholm . . 197 New Ericsson Exchanges during 1933 209
Public Exchanges. Automatic Exchanges in Finland 60 Elektrisk Bureau Builds Ericsson Automatic Exchanges for Iceland and Norway 61 The Automatic Telephone Exchanges in Iceland 105 The Birmingham Telephone Area 107 Party Line Telephones in Hungary 168 Rural Exchanges in Norway 171 The Automatic Telephone Exchange in Arendal.. 173 Automatic Telephone Exchanges for LB-Systems 195 The Automatization of the Suburban Telephone System of Stockholm 210
Private Exchanges. P. A. X. for 10 Lines 69 A New Design of Private Automatic Exchanges 127 P. A. X. for 10 Lines, with Secret Conversations 128 Charging and Mains-Connection Plants. Automatic Control Unit for Accumulator Charging 68 Mains-Connection Equipment for Small Automatic Exchanges 226
Telephone Instruments. The New Ericsson Telephone 4 Big Success of Bakelite Telephones . 59Two-Line Instruments 69 Intercommunication Set for 10 and 20 Lines ... . 70 Baby Ericsson 123 A New Midget Bakelite Telephone 221 Telephone Systems for Special Purposes. A New System of Police Telephones and Signals 115 Telephones on Board Ships 121 The Ericsson Conference Telephone System 164 Loud Speaking Intercom. Telephones . 174 Mining Telephones, Switchboards and Apparatus 176 Carrier Telephony, Repeaters. Carrier Telephone Systems of Ericsson's Design 75 Single Channel Carrier Telephone System Operated on Selective-Calling Telephone Lines ... . 81 Extension of the Repeater Station at Vercelli, Italy n o The Ericsson Long Distance System in Mexico.. 135 New Catalogue: Carrier Systems 180 Toll Repeater 227
Signalling Plants for Railways, SelectiveCalling Telephone Systems. Ericsson's Selective Calling Telephone System .. 17 The Direct Current Track Circuits on the Electrified Lines of the Swedish State Railways ... . 43
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Single Channel Carrier Telephone System Operated on Selective Calling Telephone Lines ... . 81 Installation of Selective Calling Telephone System on the Paris—Compiegne Railway Line 83 Traffic Safety and Economy 91 News from L. M. Ericssons Signalaktiebolag .. 117 Automatic Section Blocking on the New Subway in Stockholm 190
Telesignaliing plants. Indicating Plant for Stock Exchange Quotations 12 The Ericsson Automatic Fire Alarm System Saves Millions 57 Signalling Plants in Hotels 113 Electric Water Level Indicators 150 Greyhound Racecourse Totalisators 212 New Catalogue: Electric Level Indicators 216
Signal Apparatus. Search Control Apparatus 129 Alarm Receiver for Emergency Signals at Sea . . 179 New Designs of DC-Bells 217
Electric Clocks. New Types of Electric Clocks 158 Synchronous Clocks 202
Components.Design and Use of Brush Switches . 51A New Tuning-Fork Buzzer Generator 67Pendulum Relay 68A New Design of Dial 124Delayed Action Relay 126Signalling Device for Small Exchanges 184Multiple Indicator 184Impulse Transmitter 224Special Designs of Dials 225
Measuring Instruments, Electricity Meters.New Catalogue: Measuring Instruments 64The Duration Meter 65Instrument for Testing Dials . 68New Catalogue: Electricity Meters 119A New Impulse Ratio Tester . 125An Audio Frequency Generator of an InterestingNew Design 128New Types of Measuring Instruments 181New Experience on Gain Measurement 228
Condensers.Condensers for Protection against Atmospheric Excess Voltages 3 1Paper Wound Condensers for Telephony and Wireless 102Condensers for the Improvement of Power Factor of High Frequency Furnaces 118Static Power Condensers and their Use 141Paper-Paraffin-Insulated Condensers for Filter Circuits . 215
Electric Cooking Ranges.
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Standardization of Electric Cooking and Heating Appliances 56New Types of Rex Products 98
Lighting.New Catalogue: Fitting Material 119
Miscellaneous.Ericsson Technics, Nr. 1, 2 and 3 63Ericsson Technics, Nr. 4 120Woldemar Brummer f 185
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Vol. XI 1934CONTENTS-
TELEPHONE OPERATIONSReliability and Manintenance Costs of the Automatic Telphone Exchanges in Stockolm during 1933, with Summary for 1931-1933 67Name-Calls in Telphone Service 162New Ericsson Exchanges during 1933 164Ericsson Talking Machines in Sevice in Sweden and Poland 176
PUBLIC EXCHANGESA Service Telphone System in Holland 3Automatization of Rural Districts – with Special Regadr to Conditions in Denmark 23New Ericsson Exchanges in Norway 26New Telephone Installations in Tampere 115Revertive-Impulse Repeaters for AC 133
PRIVATE EXCHANGESParty Line Telephones in Hungary 30Party Lines 50
LONG DISTANCE TELEPHONYThe New Ericsson Loading-Coil Wirks 39Repeater for Broadcasting Transmission 40The Bombay –Kirkee-Dhond Carrier System 77The Dutch Transmission System 82The Telephone Cable Network on the North and West Lines of the Swedish State Railways 99
SIGNALLING PLANTS FOR RAILWAYS, SELECTIVE CALLING TELEPHONE SYSTEMSThe Interlocking System at the Stockholm Centrals Station 13The Interlocking System at the Stockholm Centrals Station (contd) 57Electric Railways-Signallin Plant in Warsaw 111Selective-Calling Telephone Plants in Sweden 129 TELESIGNALLING PLANTSPhoto-Electric Burglar-Alarm System 27Photo-Electric Talking Machines 85Starting and Time-Keeping Apparatus for Race-Courses 165Electric Indicators 173
FIRE ALARMDifferential Thermo-Contacts for Automatic Fire-Alarm Systems 34Alarm Board for Fire-Alarm Systems with Single Wirw Loops 37Alarm Board for Small Automatic Fire and Burglar-Alarm Systems 38Fire-Signalling Installation in Copenhagen 125Fire-Signalling Installation in Helsingfors 128Automatic Fire-Alarm 155Testing Thermo-Contact ina a Burning Building 168
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Fire-Sgnalling and Police-Telephone Installation in Colombia 170
ELECTRIC CLOCKS AND TIME CONTROLIndustry Needs Time Control 74Large Electric Clocks for Buidings 92
CHARGING AND MAINS-COMNNECTION PLANTSBattery Eliminator for Carrier Systems 42Automatic Charging with Battery Meter 94
MEASURING INSTRUMENTS, ELECTRICITY METERSSum-Total Meters for Power Stations 121New Measuring Instruments 135New Measuring Instruments 177
LINE MATERIALTerminal Boxes for Indoor Installations 130
MISCELLANEOUSEricsson Technics No 5 and 6, 1933 45New Orders 45Ericsson Technics No 1 and 2, 1934 141The CCIF Visits Ericsson 142Russina Commission Visits Ericsson 142Ericsson Technics No 3, 4 and 5, 1934 186
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Vol. XII 1935CONTENTS-
TABLE OF CONTENTS
TELEPHONE OPERATION Automatization of the Warsaw Telephone System 60Handling of Subscriber's Tickets and Accounts at the Stockholm Trunk Exchange 107Effect of the World Economic Crisis in the Number of Telephones 146
TELEPHONE EXCHANGESTelephone Installation on the Aircraft-Carrying Cruiser Gotland 14New Automatic Exchanges on the Ericsson System in Sweden 89New Automatic Exchanges on the Ericsson System in Czechoslovakia 89New Ericsson Exchanges during 1935 167
TELEPHONE INSTRUMENTSCoin Apparatus 3Extension Telephones 8Telephone with Inquiry Line 11Stenographer's Telephone 12Diver's Telephone 13Field Telephone Instruments 50New Field Telephone Instruments 54Ericsson House Telephone 98New Magneto Telephone Instrument 100High-Tension Protection of Telephone Instruments 102Laryngophones 133
LONG-DISTANCE TELEPHONYSuper-Audio Telegraph System 37Carrier-Frequency Channels on Selective-Calling Telephone Circuits 80Parallel Operation of Carrier Systems on Overhead Lines 151Recent Developments in Filter Technics 156
SIGNALLING PLANTS FOR RAILWAYSInterlocking Plants at Aarhus Railway Station 71Interlocking Plant at Fredericia Railway Station 119Automatic Block Installation in Copenhagen, Denmark 158
TELESIGNALLING PLANTSThe Swedish Riksdag's Voting Machine 23New System of Street-Lighting Control in Oslo 66Electrical Listing Arrangement at the Helsingfors Exchange 85Police-Telephone System—Further Developments 90Buoy-Telephone Installation for Submarines 134Staff Locaters for Hospitals 171
ELECTRICITY METERSNew Types of Electricity Meters 27Ericsson's Testing Department for Electricity Meter 111
LINE MATERIAL
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New Installation Material 40Sand Cover to Protect Cables against Insects 95New Ceiling Socket for Electric Light Fittings 141
WIRELESSNew Ericsson Radio Receivers 178
FIRE ALARMFire-Alarm Installation in the Samaritaine Stores at Paris 18Tests of Automatic Fire Alarm 131
TIME CONTROLWatchman-Control Installations 34Time Registering Apparatus 138Time-Recording Installation at a Great Stockholm Printing Plant 168Time-Table Supervision for Trams and Trains in Local Traffic 174Time-Recording Apparatus with Signal Mechanism 182
CONDENSERSElectrolytic Condensers 43The Problem of Noise Elimination and Condenser Eliminators 115Coupling Condenser for Carrier-Frequency Connections on Power Lines 128
HEATING APPARATUSNew Type of Electric Radiator 177
COMPONENTSNew Hand Magneto Generator 92Bakelite Handset with Key 93Operating Relays 94New Telephone Dial 136Bells for Alternating Current 140Impulse Repeaters for Subscriber's Lines 184Fuse with Separate Alarm Contact 186AC Relay for Signal Repeaters 188
MISCELLANEOUSNew Catalogue, 188 46Ericsson Technics No 6, 1934 48New Pamphlet 48New Catalogue, 203 96Ericsson Technics No 1 and 2, 1935 96Ericsson at the Exhibitions 143Ericsson Technics No 3 and 4, 1935 144Ericsson Technics No 5 and 6, 1935 190Vol. XIII 1936CONTENTS-
TELEPHONE OPERATION Automatization of the Suburban Telephone Network of Stockholm 2
TELEPHONE EXCHANGESAutomatic Exchange on the Ericsson System in Morocco 10
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Automatization of the Schiedam Telephone Network 155Checking Traffic on Subscribers' Lines 159New Ericsson Exchanges during 1936 164
LONG-DISTANCE TELEPHONYCarrier-Frequency Telephone Equipment for the Spanish Northern Railways 16Single-Channel Carrier Telephone for Open-Wire Circuits 52Automatic Exchanges Interconnected by Carrier Channels 79Economic Considerations on Cable Carrier-Telephone Systems 90Mains-Supply Set for Long-Distance Transmission Equipments 112Ericsson Telephone Repeaters for the Swedish State Railways 136Ericsson Three-Channel Carrier-Telephone System Bombay—Ahmedabad 151
SIGNALLING PLANTS FOR RAILWAYS, SELECTIVE CALLING TELEPHONE SYSTEMSPress-Button Electrical Interlocking Apparatus 69Centralised Traffic Control 72Dispatching Installation at Paris Gare du Nord 76Telegraph and Telephone in the Service of the Railways 126Selective-Calling Telephone Plants on Railways in Sweden 142Impulsing on Selective-Calling Telephone Lines, Ericsson System 146
TELESIGNALLING PLANTSUtilisation of Fire-Alarm Installation for Police Telephone Communications 29Telecommunication Installation at the Eastman Dental Institute in Stockholm 84Centralised Traffic Regulation in Large Towns 95Photo-Electric Talking Machine for Automatic Communication of Weather Forecasts 104Timing Devices for Race-Tracks 160
FIRE ALARMFire-Alarm Installation for the Port of Gdynia 108
TIME CONTROLUtilisation of the Centralograph in a Pulp and Paper Mill 64Automatic Breaker Control at a Power Station 82Frequency-Control Equipments 100
ELECTRIC CLOCKSThe Clock as an Advertising Medium 35Electric Time Indicator 37
HISTORICALEricsson 1876—1936 42Ericsson Telephones throughout 60 Years 43
COMPONENTSPrinciples of Construction for Transmission Equipment 19
MEASURING INSTRUMENTS, ELECTRICITY METERS
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Some Methods of Testing Electricity Meters 12Noise-Measuring Set 33Power Regulator 86Precision Instruments for the Measurement of Capacitances 115
MISCELLANEOUSNew Catalogues 38Ericsson Technics No 1, 1936 39Technical Information from A.-B. Alpha 40Ericsson Technics No 2 and 3, 1936 88Ericsson Exhibition 165Ericsson Technics No 4, 5 and 6, 1936 166
CABLES, LINE MATERIALSieverts Gebe Cable 11877 kV Underwater Cable 162
WIRELESSNew Ericsson Wireless Sets 121
CONDENSERSCondenser-Transformers 25
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Vol. XIV 1937CONTENTS-
TELEPHONE OPERATIONCCIF Recommendations for the Handling of Trunk Calls 2Methods for Reducing the Number of Spares in Local Telephone Networks 7Reliability and Maintenance at the Stockholm Automatic Exchanges 1931—1935 17Automatic Traffic over Trunk Lines 55New Telephone Systems for Small Rural Exchanges 64Technical Bases of the Automatic Operation of Rural Networks 90Maintenance Statistics for the Stockholm Automatic Exchanges 99
TELEPHONE INSTRUMENTSWatertight Telephone Instrument 37Telephone Coin Boxes 74Handset with Dial 129Mining Telephones 160The Latest British Post Office Telephone Instrument 167
LONG-DISTANCE TELEPHONYHigh-Frequency Attenuation of Open-Wire Circuits 27
SIGNALLING PLANTS FOR RAILWAYS, SELECTIVE CALLING TELEPHONE SYSTEMSInterlocking Plant at the Madrid Underground Railway 52The Thelephone in the Service of the Railways 134Railway Interlocking Plant in Portugal 142
MEASURING INSTRUMENTS, ELECTRICITY METERSMeasuring Accuracy in Adjustment and Checking of Electricity Meters 22Cathode-Ray Oscillograph with All-Round Application 81Use of the Duration Meter at a Small Electricity Plant 152
TELESIGNALLING PLANTSFire and Police Alarm Installation 130
LINE MATERIALGebe Electric Light Fittings 32
TIME CONTROLTime Control for Synchronous Clock Operation and Load Distribution 46Precision Time Giving by Telephone 132Utilization of the Centralograph in Textile Mills 146
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COMPONENTSWatertight Bell for AC 39Automatic Charging-Control Unit 85DC Fire-Alarm Bell 86Time Check 87
WIRELESSNew Ericsson Wireless Sets 168
MISCELLANEOUSFrequency Transformations, Applied on the Heaviside Expansion Theorem 40Theory of Rectifier Modulators 43Ericsson Technics No 1 and 2, 1937 88New Catalogues 172Ericsson Technics No 3, 4, 5 and 6, 1937 173
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Vol. XV 1938CONTENTS-
HISTORY Telelectrical Engineering of To-Day and of ToMorrow 46How the Ericsson System Came into Being 90Automatization of the Stockholm Telephone Network 135Sieverts Kabelverk over Fifty Years 152
TELEPHONE OPERATIONTelephone Communications in Sweden 2Hats Off to Engineering 134Changes in the World Telephone Situation 1930—1938 150
TELEPHONE EXCHANGESRural Automatic Exchanges in Finland 36New Ericsson Exchanges in 1937 43
TELEPHONE SWITCHBOARDSThe Ericsson Automatic XY System 9Hotel Switchboard 121
TELEPHONE INSTRUMENTSIntermediate Telephone Station for Automatic System 75Anti-Sidetone Connections for Telephone Instruments 112Portable Telephone Instruments 115
LONG-DISTANC E TELEPHONYSingle Channel Carrier Telephone System for Cables 63Distortion Testing Equipment for Telephone Repeaters 70
SIGNALLING PLANTS FOR RAILWAYS, SELECTIVE CALLING TELEPHONE SYSTEMSThe Telephone in the Service of the Railways II 27The Telephone in the Service of the Railways III 55The Telephone in the Service of the Railways IV 100
TELESIGNALLING PLANTSNew Adaptation for Speaking Machines 41Sound Amplifier 82
MEASURING INSTRUMENTSAutomatic Routine Tester with Impulse Machine 79
WIRELESSNew Ericsson Wireless Receivers 123Recording Discs 128
NETWORK CONSTRUCTIONConduit Construction for Telephone Networks 15Distribution Pillars 84
MISCELLANEOUSEricsson Technics N o 1, 1938 44
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Ericsson Technics N o 2, 1938 88Ericsson Technics N o 3, 4, 5 and 6, 1938 173
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Vol. XVI 1939CONTENTS-
TELEPHONE OPERATIONLeading Telephone Cities of the World 1929—1937 88Economic Stages of Extension of TelephoneNetworks 121TELEPHONE EXCHANGESManual Telephone Exchanges for CB-System 13New Ericsson Exchanges in 1938 38TELEPHONE SWITCHBOARDSAutomatic Private Branch Exchanges, System XY 2Portable 10-Line Telephone Switchboard 25Mains Connected Automatic Switchboard for 10 Lines 101
LONG-DISTANCE TELEPHONYMulti-Channel Carrier Frequency Systems for Unloaded Cables 42
SIGNALLING PLANTS FOR RAILWAYS, SELECTIVE CALLING TELEPHONE SYSTEMSThe Telephone in the Service of the Railways V 67New Interlocking Plant at Sundbyberg 89Interlocking Plant at Upsala C 97Some Swedish Remote Control Installations for Railways 125Railway Interlocking Plants in Portugal 129
COMPONENTSEricsson's Ball Selector and Selector Relay 114
LINE MATERIALService Boxes for Gebe Fittings 137
TELESIGNALLING PLANTSPolice Signalling System 74
NETWORK CONSTRUCTIONTelephone Cable Suspenders 28ELECTRIC CLOCKSEurope's Largest Rotating Clock 139
MEASURING INSTRUMENTS, ELECTRICITY METERSCable-Finder 34Distribution of Costs when Fixing Rational Electricity Tariffs 60Electrical Measuring Instruments 82Ericsson Cable-Finder in India 105Telephone Instrument Tester and Microphone Resistance Tester 132
FILMNew Sound Projector for Sub-Standard Film 106MISCELLANEOUS
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Ericsson Technics No 1, 1939 40Ericsson Technics No 2, 1939 80New General Catalogue 111Ericsson Technics No 3, 1939 112Ericsson Technics No 4 and 5, 1939 142
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Nota: Los Vol XVII al XXI de los años 1940 a 1944 sólo se encuentran en sueco en el archivo web de Ericsson.
TELEFONSTATIONERAutomatisk telefoncentral av Ericssons system i Istanbul 2Telefonanläggningar på Curacao 54Nya Ericssoncentraler 1939 29
TELEFONVÄXLARHalvautomatiska landsväxlar 18Portväxel med XY-väljare 119
TELEFONAPPARATERMyntapparaterna i telefondriften 12Huvudmikrotelefon 86Nya hemtelefoner 114
LANGDISTANSTELEFONIBärfrekvenssystem för telefoni och fjärrkontroll över kraftledningar 34Den nya kabeln Stockholm—Norrtälje med enkanal bärfrekvensutrustning 77Utrustning för bärfrekvensgenerering för kabelenkanalsystem 83Flerkanal bärfrekvenssystem för opupiniserade kablar II 98
TELESIGNALANLÄGGNINGARGadesignalanlaeg med Impulsspoler 93Televoltsysfemet för flygalarmering över e/kraftnät 49
ELMÄTAREKontroll och underhåll av elmätare 24Varvräknare för provning av elmätare 88
INSTALLATIONSMATERIELKopplingsplintar för infällt montage 121Sieverts kabelskåp 125Några Gebenyheter 58
DIVERSEEricsson Technics No 6, 1939 32Nya användningsområden för frekvens-transformationer 64
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Vol. XVIII 1941CONTENIDOS (ORIGINAL EN SUECO)
INNEHALLSFÖRTECKNING
TELEFONDRIFTHälsingborg kopplar över 2
TELEFONSTATIONERNya Ericssoncentraler 1940 31Telefonanläggningen i Medellin 47
TELEFONVÄXLARSnörlösa telefonväxlar för LB-system 110
TELEFONAPPARATERBordapparat for hemtelefon 93
LANGDISTANSTELEFONIMotkopplat fyrtrådsöverdrag 24Bärfrekvenskablarna Göteborg—Hälsingborg I 34Bärfrekvenskablarna Göteborg—Hälsingborg II 71Bärfrekvenstekniken i Telegrafverkets tjänst 66
JÄRNVÄGSSIGNALANLÄGGNINGAREtt modernt elektriskt ställverk 8Fällboms- och signalanläggningen vid klaffbron över Falsterbokanalen 90Ny elektrisk signalsäkerhetsanlåggning vid Stockholm O 114
TELESIGNALANLÄGGNINGARAnslutning av vattensprinkleranläggningar till brandtelegrafnat 17Personmarkering med fingerskiva 86
KONSTRUKTIONSDETALJERLaboratorieplintar 56
MÄTINSTRUMENT, ELMÄTAREGenerator för 20—200 000 p/s 27L.M. Ericssons elmätare 53
INSTALLATIONSMATERIELTrycktäta kabelmuffar 12Ny kabelmuff för jordkabel 95Ledningsförlåggning på bärtråd och ledningshyllor 118
FLYGLARMFlyglarmanläggning med tyfoner 98
RADIOHögkänslig radiomottagare med optisk inställning 79Nya Radiolamottagare 122
KASSAREGISTER
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L.M. Ericssons kassaregister 60
DIVERSEStillfilmsapparaten Audiola 19Beräkning av löptidskorrigerande nät medelst fre-kvenstransformation 29
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Vol. XIX 1942CONTENIDOS (ORIGINAL EN SUECO)INNEHÅLLSFÖRTECKNING
TELEFONDRiFTSamtalsdebitering och numrering vid automatisk telefontrafik 26Automatiseringen av Åbo telefonnät 50
TELEFONSTATIONERNya LM. Ericssoncentraler 1941 23
LÄNGDISTANSTELEFONILätt enkanalsystem för luftledningar 11Nytt ringöverdrag 68Motkopplat landsledningsöverdrag 91
SELEKTORTELEFONINy typ avgreningsfilter för selektorledningar 19
INSTALLATIONSMATERIELBelysningsarmatur för explosionsfarliga lokaler 15N-säkringen — ett nytt säkringselement för högeffektsäkringar 44Gebearmaturer med goliat-hållare 47
FLYGLARMLuftbevakning och alarmering 2Anläggningar för flygvarning och alarmering per telefon 8Anfallsalarmering inom industrin 55
RADIOEffektiv radiomottagare för alla vågtyper 80Nya Radiolamottagare 84
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Vol. XX 1943CONTENIDOS (ORIGINAL EN SUECO)
INNEHALLSFÖRTECKNING
TELEFONDRIFTEkonomiska synpunkter på landsautomatisering 26Telefontrafikens automatisering vid statens järnvägar 50Landsautomatisering och interurbantaxor 81
TELEFONSTATIONERJämförelse mellan Siemens, Autelco, Rotary och Ericssons automatiska telefonsystem 2Nya LM Ericssoncentraler 1942 23
TELEFONVÄXLARManuell lokaltelefonväxel för CB-system 19Centrallinjetillsats för snörlösa telefonväxlar 46
TELEFONAPPARATERTelefonapparat med signalomkopplare 62
LÅNGDISTANSTELEFONISändare och förstärkare för trådradio 3716-kanal-bärfrekvenssystem för luftledningTrondheim—Fauske, Norge 74
MÄTINSTRUMENTEn ny nivåmätare för frekvensområdet 30 hr till 1 Mhz 16
NÄTBYGGNADNykonstruktioner och moderniseringar av nätmateriel I 66Nykonstruktioner och moderniseringar av nätmateriel II 92
INSTALLATIONSMATERIELSieverts Gebearmatur för lysämneslampor 86
RADIONya Radiolamottagare 89
DIVERSEElektrisk varningslykta för gatuarbeten 98
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Vol. XXI 1944CONTENIDOS (ORIGINAL EN SUECO)
INNEHALLSFÖRTECKNING
TELEFONSTATIONERNya LM Ericssoncentraler 1943 22Nya svenska telefonanläggningar med 500-linjers väljare 50
TELEFONAPPARATERNy myntapparat 34
TELESIGNALANLÄGGNINGARNya centralographkontakter 8LM Ericssons fjärrvisaresystem för likström 18Branddörrkontroll 37LM Ericssons nya passerkontrollapparat 46Svagströmsanläggning vid den nya brandstationen i Brännkyrka i Stockholm 66Centralograph med fingerskiva 99
LANGDISTANSTELEFONI3-kanal bärfrekvenssystem för luftledningar 74
JÄRNVÄGSSIGNALANLÄGGNING ARCentraliserad tågledning vid Stockholm—Saltsjöns järnväg 12
NÄTBYGGNADIndragning av telefonkablar i underjordisk cementkanalisation 26Ny typ av golvbrunnar för infällt montage av svagströmsledningar 95
RADIORadiostationer för polisradioväsendet 2Nya Radiola-mottagare 60
DIVERSEEricsson Technics 23, 48Ny elstängselapparat 40Allformatorn i ljusets tjänst 43
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Vol. XXII 1945CONTENTS-
TELEPHONE OPERATIONRational Charging Methods for Automatic Telephone Traffic 2Registering of Duration of Conversation 8Change-over at Helsingborg 70Economic Viewpoints on Rural Automatisation 76Call Debiting and Numbering for Automatic Telephone Traffic 87The Automatisation of the Telephone Traffic on the Swedish State Railways 103
TELEPHONE EXCHANGESNew LM Ericsson Exchanges 1939—1944 24Telephone Plant in Medellin 96Telephone Plant on Curacao 115New Toll Exchange at Helsingfors 130
TELEPHONE EXCHANGESPrivate Telephone Intermediate Switchboard forSemi-Automatic Distribution of Incoming Calls 175
TELEPHONE INSTRUMENTSNew Domestic Telephones 119Telephone Instrument with Call Transfer Relay 125Loud-speaker Telephone 148Conference Telephone 162
TELESIGNALLING PLANTSLM Ericsson's Mine Signalling System 171
LONG-DISTANCE TELEPHONY8-Channel Carrier Systems for Unloaded Cables 11, 43
NEW FEATURES OF CONSTRUCTIONThe Employment of Crossbar Selectors in bypath Systems 30Portable Exchange Tester for Automatic Telephone Exchanges 59
SIGNALLING PLANTS FOR RAILWAYSValby Station, a New Safety Plant in CopenhagenLocal Railway Traffic 155Interlocking Plants at La Coruna and Santiago 180
WIRELESSModern Radio Loudspeakers 19New Svenskradio Wireless Receivers 187
MISCELLANEOUSEricsson Technics No 6, 1939 and No 43 28Catalogue Numbers on the ABC System 63Ericsson Technics No 44 67Ericsson Technics No 45 68
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Vol. XXIII 1946CONTENTS-
TELEPHONE EXCHANGESNew L M Ericsson Exchanges 1945 48Automatic Telephone Exchange on the L M Ericsson System at Istanbul 176New Swedish Telephone Plants with 500-line Selectors 187Automatisation of the Abo Telephone Network 198New Railway Telephone Plant at Stockholm Central Station 276
TELEPHONE SWITCHBOARDSSemi-Automatic Rural Exchanges 204Hallway Switchboard with XY-selectors 221New Series of Manual LB. Switchboards with Cords 250Automatic Private Branch Exchange Type ALD 20 283ALD 10 — a New Automatic Private Switchboard 292
TELEPHONE INSTRUMENTSCoin Boxes in Telephone Service 211New Coin Boxes 218
LONG-DISTANCE TELEPHONYNew Carrier Frequency Systems for Telephony and RemoteMetering and Control on Power Lines 2Three-Channel Carrier Telephone System for Open-Wire Lines 50Rural Line Repeater with Negative Feed-back 71New Ringing Repeater 75New Single Channel Carrier Frequency Telephone System for Open-Wire Lines 259
MEASURING INSTRUMENTSDirect Current Potentiometers 35Alternating Current Potentiometer 297
SIGNALLING PLANTS FOR RAILWAYSNew Electric Interlocking Plant lor Stockholm Tramways 38New Press-Button Interlocking Control Machine 78Interlocking Plant at the Bascule Bridge over the Falsterbo Canal 85Centralized Traffic Control on the Stockholm—Salts|obaden Railway 88New Interlocking Plant at Stockholm East Station 94Electric Interlocking Plant at Sakskobing Station 267
TELESIGNALLING PLANTSStreet Traffic Signal Plant with Impulse Coils 81Telecommunications in the New Fire-Station at Brannkvrka 223L M Ericsson's Remote Indicator System for DC . 230Dial Operated Centralographs 234Connection of Sprinkler Installations 241Fire-alarm Pillar Boxes 243Automatic Staff Locator 245
WIRELESSA New Radiogramophone — Svenskradio 1467 44Svenskradio 463 — New Radio Receiver in Estrade Model 271
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NEW FEATURES OF CONSTRUCTIONLaboratory Terminal Blocks 99
MISCELLANEOUSLars Magnus Ericsson — a Brief Biographical Sketch 105Developments in Teletechnics 1846—1946
Telegraphy and Telephony 122Tele-signalling 150Radio-Technics 161
New Electric Fencing Apparatus 238To Commemorate the Centenary of Lars Magnus Ericsson's Birth 249
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Vol. XXIV 1947CONTENTS-
NO ESTA EN LA WEB
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Vol. XXV 1948CONTENTS-
TELEPHONE OPERATIONMaintenance of Exchanges with 500-line Selectors 2Method of Computating the Grade of Service in a Selection Stage Composed of Primary and Secondary Switches 11
LONG DISTANCE TELEPHONYMultichannel Open-wire Telephone Systems for Portugal 40Voice Frequency Telegraphy 54Recent Developments in L M Ericsson Carrier Telephone System 110
TELE-SIGNALLING PLANTSL M Ericsson's New Telegraph Instrument 65Photo Cell Installations 128
MEASURING INSTRUMENTSStorage Battery Meters 35New Balancing Machines for the Dynamic Balancing of Rotors 87
NETWORK CONSTRUCTIONA Local Line Plant System —The L M Ericsson HT System 74Installation of PVC-insulated Wires 82The Electric Drainage of Cable Networks A New Form of Drainage Apparatus 118
WIRELESSTwo Small Svenskradio Receivers 101
MISCELLANEOUSA Method for Computing Track Circuits II 18Ericsson Technics 72, 108Power Relay for the Automatic Connection and Disconnection of Condensers 105
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Vol. XXVI 1949CONTENTS-
TELEPHONE OPERATIONThe Crossbar Switch and the Development of Crossbar systems in Sweden 38
TELEPHONE EXCHANGESNew Privaie Automatic Exchanges with XY-selectors 17LM Ericsson Exchanges 1948 36New Telephone Installation in Bogota 74New Developments on the LM Ericsson Telephone Systemwith 500-line Selectors 106
TELEPHONE INSTRUMENTSA New Wal l Instrument 6
LONG DISTANCE TELEPHONE8-channel Carrier Telephone System for the SwedishState Railways 72
TELE-SIGNALLING PLANTSFire Alarm Telegraph for Small Communities 24New Loud-speaking Intercom Telephone 86New Types of Thermal Detectors for Automatic Fire Alarm Systems 131
SIGNALLING PLANTS FOR RAILWAYSElectric Interlocking Plant at the Car Depot the Stockholm Tramways at Brannkyrka 62
MEASURING INSTRUMENTSAn Indicator for Checking the Insulation of Telephone Cables 69A Level Meter for the Frequency Range 30 c,s to 5 Mc,'s 121 Technical Potentiometers 124
WIRELESSSvenskradio 490 BAT. — a New Battery Receiver 33 SRA Loud-speakers 99New Svenskradio Receivers 133
FEATURES OF CONSTRUCTIONThe Crossbar Switch Its Design and Manufacture 52 Frame Wor k Design for Telephone Exchanges 91
MISCELLANEOUSL M Ericsson's Laboratories 2Indicating and Recording Echo Sounder PEK-3G - an Interesting New Design from Svenska Radicaktiebolaget 10The Laminated Contact - a New Type of Contact and its Application to Certain Important Forms of Switching Devices 28L M Ericsson's Factories 94Sealing Ends of Rubber 103
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Vol. XXVII 1950CONTENTS-
TELEPHONE EXCHANGESL M Ericsson Exchanges 1949 32The L M Ericsson Crossbar Switch System in Helsinki 106
TELEPHONE SWITCHBOARDSManual Private Branch Switchboards with Cords 36
TELEPHONE INSTRUMENTSConference Telephone, Type DYA 2New Telephone Instrument for the L M Ericsson Loudspeaking Telephone 57
MEASURING INSTRUMENTBalancing Machine for Motor Car Wheels 46
NETWORK CONSTRUCTIONThe Binding Wire Lightning Arrester — a New Form of Lightning Protection for Telephone Open Wire Lines 16On the Planning of Networks for Telephone Plants 84
TELESIGNALLING MATERIALNew Type of Staff Locator 60New Models of Engaged Signalling Equipment 125
SIGNALLING PLANTS INSTALLATIONSVehicle-actuated Road Traffic Signals 98Plug-in Type Safety Signal Relays 119
LINE MATERIALAlpha Three-way Wal l Socket 97The ATU-systern — a New Form of Light Fitting 135
WIRELESSSvenskradio Table Gramophone 29Ericsson Radio Receivers 63
FEATURES OF CONSTRUCTIONA Midget Telephone Relay 116
MISCELLANEOUSAktiebolaget Rifa - - L M Ericsson's New Capacitor Factory 24Ericsson Technics 33, 83AB Alpha — Mechanical and Plastic Products 51Sieverts Kabelverk's Laboratories 70The Ericsson Type BMN Battery Eliminators 77L M Ericsson at the St Eriks Fair 104The Most Northerly Automatic Exchange in the World 127Equipment for Power Supplying at Constant Voltage and Frequency 128
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Vol. XXVIII 1951CONTENTS-
TELEPHON E EXCHANGESMaintenance of Automatic Telephone Exchanges with 500-line Selectors 2New Developments on L M Ericsson's Telephone System with soo-line Selectors L M Ericsson Exchanges 1950 30The L M Ericsson By-path System with Crossbar Switches — Fundamental Principles 04Theoretical Aspects of Crossbar Exchange Design 104
TELEPHONE INSTRUMENTSNew Domestic Telephone with an Ivory-white Finish 34
LONG DISTANCE TELEPHONYRadio Tinks for Power Stations 42VHF Radio Multichannel Carrier Telephone Circuits in Colombia 62Carrier Frequency Circuits in the State Railways Telephone Network 119
NETWORK CONSTRUCTIONAn Optimum Law for Telephone Networks 11New Wires for Subscribers' Lines 48
MEASURING INSTRUMENTSPhase-Sequence Indicator 6oThermotechnical Instrumentation for the Furnaces in Tube Rolling Mills 73
TELESIGNALLING MATERIALAbsence Indicators 20
STREET TRAFFIC INSTALLATIONVehicle-actuated, Progressive Road Traffic Signals in Vasteras 23
RAILWAY INTERLOCKING PLANTNew Type of Interlocking Plant for the Swedish State Railways 82
FITTING MATERIALSievert's Dust- and Watertight Fitting ALAV for Fluorescent Tubes 27
WIRELESSNew Ericsson Receivers S9
MISCELLANEOUSTclefonaktiebolaget L M Ericsson's 75-year Jubilee 39Hydraulic Moulding Presses for Plastic Parts Installed in L M Ericsson's Affiliated Plant at Karlskrona n 1Vol. XXIX 1952CONTENTS-
TELEPHONE EXCHANGESL M Ericsson Exchanges 1951 61
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Manual Trunk Exchanges with Cord Pairs 68
TELEPHONE SWITCHBOARDSNew Automatic Relay Operated Exchange for 9 Extensions and 4 Exchange Lines 54Private Automatic Branch Exchange, AGD System, with Cordless Switching 77
TELEPHONE INSTRUMENTSBattery Box for Portable Telephone Instruments 121Five Million Telephone Instruments 100Improved Telephone Headset 120New Magneto Telephone Instruments 43
NETWORK CONSTRUCTIONGas Control on Telephone Cables 108High-Tension Protection Equipments for Telephone Instruments Connected to Conductors Mounted on Power Line Poles 2
POWER SUPPLYCapacitor Voltage Transformers 80Small Automatic Charging Rectifiers 17
MEASURING INSTRUMENTSElectricity Meters for Alternating Current 85The Ferrometer, an Apparatus for Testing the Quality of Steel 49Lacquer Tensometer 122
TELESIGNALLING MATERIALModern Telesignal Systems at the Head Office of Stockholms Enskilda Bank 34Modern Water Level Indicators 12
WIRELESSEricsson Novelties 91Portable Field Radio Equipment SUF-21 K 22
MISCELLANEOUSL M Ericsson-News from All Quarters of the World 29, 63,95,125
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Vol. XXX 1953CONTENTS-
TELEPHONE EXCHANGES L M Ericsson Exchanges 1952 27 Maintenance of Crossbar Switch Exchanges 34 Cut-over to Crossbar Systems in Aarhus 69 Conversion of the Aarhus Telephone Exchanges 75 Choice of Automatic Telephone System for Copenhagen and District 106 The Copenhagen New Automatic Telephone System with Crossbar Switches 112
TELEPHONE INSTRUMENTS Modern Telephone Systems for Internal Communications 13 L M Ericsson's Telephone Answerer 100
LONG DISTANCE TELEPHONY New Loading Coils 40
SELECTIVE CALLING TELEPHONY Automatic Operation of Swedish Railway Telephone Systems 2
NETWORK CONSTRUCTION Tesla Quick Tester for Rare Gas Tubes 24 A Heavy Duty Protector for Outdoor Installation 59 New High Tension Protection Equipments for Telephone Instruments 53
MEASURING INSTRUMENTS The Ductilometer Test — A New Method of Establishing the Ductility of Metals 119A New Power Relay 128
TELES1GNALLING MATERIAL New Shockproof Loudspeaker 26 L M Ericsson's Emergency Telephone System 45 Telecommunication Equipment on Board s/s Birger far! 86
RAILWAY INTERLOCKING PLANTS Static Frequency Converters for Track Circuit, 56
WIRELESSNew Ericsson Radio Receivers 90FEATURES OF CONSTRUCTION30-Line Selectors for Small Automatic Telephone Exchanges 50New Coupling Components 54New Five-Digit Counter 80
BIOGRAPHICAL DATAHelge Ericson in Memoriam 66H T Cedergren — a Swedish Telephone Pioneer 98
MISCELLANEOUSL M Ericsson-News from All Quarters of the World 29, 61, 93, 133
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Vol. XXXI 1954CONTENTS-
PUBLIC TELEPHONE EXCHANGESLM Ericsson Exchanges Cut into Service 1953 27Traffic Reliability for the L M Ericsson Crossbar System inHelsinki 2Maintenance Work and Reliability for Automatic Telephone Exchanges with the L M Ericsson 500-line Selector in Stockholm 70
PRIVATE TELEPHONE EXCHANGESNew Type of Cordless Private Branch Exchanges 48Automatic Call Distributors for Information, Booking and Similar Offices 8
NETWORK CONSTRUCTIONDistribution System with Through-Connected Basic Load 79Gas Control on Telephone Cables by Gas Flow Meters and Automatic Pressure Compensation 34
MEASURING INSTRUMENTSBalancing Machine for Objects Rotating at High Speeds 62
TELESIGNALLING MATERIALShips' Master Communicator Systems 109The L M Ericsson Parking Meter 86Program Transmitter 115Staff Locator Panels 23Key-set Operated Staff Locator System with Sequence Paging 19
RAILWAY INTERLOCKING PLANTSC.T.C—a Means of Improving the Competitive Power of Railways 118All-Relay Interlocking Plant for Danish State Railways 89
CAPACITORSNew Rack Mounting Capacitor 18Plastic Film Capacitors 56
RADIOPortable Radio Equipment, Type P-ll 25
ELECTRON TUBESCoaxial Trochotron for Pulse Counting 14Modern Long Life Electron Tubes for Telephony Purposes—Some Experiences of Life Tests 94Review of SER Electron Tubes: Standard and Long Life Types S3
FEATURES OF CONSTRUCTIONThe Multicoil Relay—a New Switching Device 83
MISCELLANEOUSEricorder—L M Ericsson's New Tape Recorder 102L M Ericsson News from All Qaurters of the World 29» » » » » » » » 55» » » » » » » » 97» » » » » » » » 125New Type of Line Tester 113
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Vol. XXXII 1955CONTENTS
T E L E P H O N E E X C H A N G ESApplications for the L M Ericsson Telephone Answering Machinein Telephone Exchanges 44Electronic Identifier for Subscriber's Stage 2The Assumptions for Economic Maintenance of L M Ericsson'sAutomatic Telephone Exchanges 96LM Ericsson Exchanges Cut into Service 1954 29New Electronic Time Meter 16L M Ericsson's Subsidiary Automatic System AML 10 10710-line Relay Switchboard with Built-in Battery Eliminator 70
S E L E C T I V E C A L L I N G T E L E P H O NYSelective Calling Telephone Systems for Railways 37
P O W E R C O N S U M P T I ONSeries Capacitors in 6—20 kV Overhead Transmission Line Systems 8
T E L E S I G N A L L I N G M A T E R I ELSlave Clocks for Outdoor Use 11 2
S I G N A L I N S T A L L A T I O NSRemote Control of Lighthouse and Fog Signal Installations 1 15
R A I L W A Y I N T E R L O C K I N G P L A N TSL M Ericsson's Manual Block System 74
R O A D S I G N A L I N S T A L L A T I O NSTraffic Signals at Frescati. Stockholm 54
W I R E L E S SEricsson TV Receiver 2 1
I N S T A L L A T I O N M A T E R I ELThe New Pello Switch 89
E L E C T R O N TUBESLong Life Electron Tubes I8AQ5//6AQ5L and 18C51 //2C51L 25 6760 and 6761—Two New Power Amplifiers in SER Series of Long Life Tubes 85
S O U N D D I S T R I B U T I O N E Q U I P M E NTL M Ericsson's Combine-Unit Systems of Sound Distribution 49Program Distribution Plant for United Nations 72High-Efficiency 10-watt Amplifier 79
C O N S T R U C T I O N D E T A I LSNew Automatic Circuit-Breaker 83
M I S C E L L A N E O U SDynamic Measurements—a necesitty in the development of High Speed Telephone Systems 64L M Ericsson News from All Quarters of the World 31
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……………………………………………..59……………………………………………..91…………………………………………….119New Line Identification Equipment 57
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——————————— FIN DEL DOCUMENTO V2.0 ER 1924 A 1955——————————
