A modification of “Kite and spear-head mechanism 5a” proposed in 1877 by A. B. Kempe, London.
Length of green bars: a
Length of yellow bars: 0.5a
Length of orange bars: 0.25a
Distances between the pivots on:
- Pink plate: (b+0.75a) and (b+0.25a)
- Blue plate: (b+a) and b
- Popcorn plate: b and (b+a)
b: arbitrary length
The pink plate moves along an absolutely straight line.