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

[432]. Treadle, cord and pulley crank motion.

[433]. Circular into reciprocating motion, or vice versâ.

[434]. Another form of sun-and-planet gear. The ring is stationary, and the bush on which the planet wheel revolves is slotted to fit the ring; the planet wheel is fixed to the connecting rod end.

[435]. Bent shaft and arm motion.

[436]. Reciprocating motion by a return thread screw and lever.

See also [Sections 62], [31], and [74].

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Section 22.—CONCENTRATED POWER.

Multiplication of power by great reduction of speed is accomplished by the following devices, and various obvious modifications of them. Ordinary methods comprise—Gearing (see [Section 84]), the screw or compound screws (see [Section 78]), and the wedge and lever (see [Section 53]). By differential screws, [Nos. 1379], [1380].

[437]. Compound lever.