Model: M07 Differential Screw Measurement Mechanism
This differential screw mechanism is based on two screw pairs each with different pitch such that the slider moves a distance proportional to the pitch difference. This device is used in precision measurement instruments. Reuleaux attributed its invention to Prony and to White, but gave no further details in his book.
Francis Moon 2004-07-00
- Reuleaux, Kennedy : Kinematics of Machinery (§151 Fig. 383, p. 316, 1876)