Question

In the given figure, 1 and 2 are sliders, 3 is a bar and 4 is a fixed slotted plate, identify the mechanism.

(a) Elliptical trammel

(b) Scotch yoke mechanism

(c) Oldham’s coupling

(d) Gnome engine

This question was addressed to me in class test.

This is a very interesting question from Double Slider Crank Chain & its Inversions in portion Simple Mechanisms of Machine Kinematics

Answer 1

Right option is (a) Elliptical trammel

To explain I would say: In the given figure, the slotted lever is fixed and there are two sliders, hence it is a double slider crank chain, since the slotted plate is fixed, it is an inversion. This inversion is known as elliptical trammels.