See Expanding auger, [Section 36].
Section 31.—DIFFERENTIAL GEAR.
(See also [p. 74].)
[2122]. Differential piston indicator for steam engines.
[2123]. Harrison’s differential epicycloidal hoist gear. Pinion A is fast to the barrel and loose on the shaft, B is keyed to the shaft, C and D are cast together, and run on a stud in the large wheel E, which is loose on the shaft; A and B have different numbers of teeth.
[2124]. Differential screw bolt and sleeve movement.
[2125]. Differential screw valve fitting, with cone seat, tightened up by the T head and fine thread central screw; used for gas bottles.
[2126]. Chinese windlass. The origin of modern differential gear.