The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

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.

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