THEORY OF MACHINES 16 MARKS SOLVED Q&A
ME 3491-THEORY OF MACHINES UNIT – I KINEMATICS OF MECHANICS Explain the three inversions of double slider-crank chain with suitable example. (APR/MAY 2023) The following three inversions of a double slider crank chain are important from the subject point of view: 1. Elliptical trammels. It is an instrument used for drawing ellipses. This inversion is obtained by fixing the slotted plate (link 4), as shown in Fig. The fixed plate or link 4 has two straight grooves cut in it, at right angles to each other. 2. Scotch yoke mechanism. This mechanism is used for converting rotary motion into a reciprocating motion. The inversion is obtained by fixing either the link 1 or link 3. In Fig. link 1 is fixed. 3. Oldham’s coupling. An Oldham’s coupling is used for connecting two parallel shafts whose axes are at a small distance apart. The shafts are coupled...