Question:
Justify with neat sketch elliptical trammel as an inversion of double slider crank chain.
Answer:
Elliptical trammel :
Since Elliptical trammel consist of two turning pairs and two sliding pairs, it is inversion of double slider crank chain. This instrument is used for drawing ellipses. This inversion is obtained by fixing a slotted plate (link 4) as shown in fig. It has got two right angled grooves cut into it. 1-2 is turning pair 2-3 is turning pair 1-4 is sliding pair 3-4 is sliding pair.................................. [2 M]
