CHAPTER NO.01CHAPTER NO.01

SIMPLE MECHANISMSSIMPLE MECHANISMS

INVERSION OF 4-BAR CHAININVERSION OF 4-BAR CHAIN

1)1)BEAM ENGINEBEAM ENGINE

2)2)COUPLING ROD OF COUPLING ROD OF LOCOMOTIVE LOCOMOTIVE

3)3)WATT’S INDICATOR MECHANISMWATT’S INDICATOR MECHANISM

INVERSIONS OF FOUR BAR INVERSIONS OF FOUR BAR CHAINCHAIN1. Crank-rocker mechanism 1. Crank-rocker mechanism

2. Double crank mechanism 2. Double crank mechanism

3. Double rocker mechanism 3. Double rocker mechanism

BEAM ENGINE

2) COUPLING ROD OF LOCOMOTIVE DOUBLE 2) COUPLING ROD OF LOCOMOTIVE DOUBLE (CRANK MECHANISM) (CRANK MECHANISM)

COUPLING ROD OF A LOCOMOTIVE

3) WATT’S INDICATOR MECHANISM (DOUBLE 3) WATT’S INDICATOR MECHANISM (DOUBLE LEVER MECHANISM)LEVER MECHANISM)

PANTOGRAPHPANTOGRAPH

Ackermann steering gear Ackermann steering gear mechanismmechanism

SINGLE SLIDER CRANK CHAINSINGLE SLIDER CRANK CHAIN

lnversions of slider crank lnversions of slider crank chainchain

(a) crank fixed (b) connecting rod fixed (c) slider fixed(a) crank fixed (b) connecting rod fixed (c) slider fixed

RECIPROCATING ENGINE MECHANISM

INVERSIONINVERSION OF SINGLE SLIDER CRANK OF SINGLE SLIDER CRANK CHAINCHAIN

• PENDULUM PUMP, HAND PUMPPENDULUM PUMP, HAND PUMP

• OSCILLATING CYLINDER ENGINEOSCILLATING CYLINDER ENGINE

• ROTARY I.C. ENGINEROTARY I.C. ENGINE

• CRANK & SLOTTED QUICK RETURN CRANK & SLOTTED QUICK RETURN MOTION MECHANISMMOTION MECHANISM

• WHITWORTH QUICK RETURN MOTION WHITWORTH QUICK RETURN MOTION MECHANISMMECHANISM

PENDULUM PUMP (BULL ENGINE) PENDULUM PUMP (BULL ENGINE)

Hand Pump Hand Pump

OSCILLATING CYLINDER OSCILLATING CYLINDER ENGINEENGINE

Oscillating cylinder engine–II inversion of Oscillating cylinder engine–II inversion of slider crank mechanism (connecting rod slider crank mechanism (connecting rod fixed)fixed)

ROTARY I.C. ENGINEROTARY I.C. ENGINE

ROTARY ENGINEROTARY ENGINE

CRANK & SLOTTED QUICK CRANK & SLOTTED QUICK RETURN MOTION MECHANISMRETURN MOTION MECHANISM

WHITWORTH QUICK RETURN WHITWORTH QUICK RETURN MOTION MECHANISMMOTION MECHANISM

INVERSION OF DOUBLE SLIDER CRANK INVERSION OF DOUBLE SLIDER CRANK CHAINCHAIN

• ELLIPTICAL TRAMMELELLIPTICAL TRAMMEL

• SCOTCH YOKE MECHANISMSCOTCH YOKE MECHANISM

• OLDHAM’S COUPLINGOLDHAM’S COUPLING

ELLIPTICAL TRAMMELSELLIPTICAL TRAMMELS

Oscillator/ReciprocatorOscillator/ReciprocatorOscillators and reciprocators Oscillators and reciprocators

transfer motion along a path transfer motion along a path in a forward –backward in a forward –backward motion, and continuously motion, and continuously repeat. Cams and cranks & repeat. Cams and cranks & sliders are examples.sliders are examples.

The speed and direction may The speed and direction may change, depending on the change, depending on the types of additional linkages types of additional linkages or mechanisms used.or mechanisms used.

See a See a K’nex water wheel covert covert the linear flow of water into the linear flow of water into rotary motion, then back to linear rotary motion, then back to linear motion!motion!

SCOTCH YOKE MECHANISMSCOTCH YOKE MECHANISM

OLDHAM’S COUPLINGOLDHAM’S COUPLING