[2364]. Compound weight motor, with limited fall. Several weights may be used as shown, slightly decreasing in weight towards the motor. When weight D has run down, C will begin to fall, and go on till all the weights have run down.
[2365]. Hot-air motor. A current of hot air passing up the flue revolves the turbine.
Naphtha engines are gas engines employing the vapour of naphtha and air as an explosive mixture, instead of that of petroleum (oil engine) or carburetted hydrogen gas (gas engine).
Section 62.—PAWL AND RATCHET MOTIONS.
(See also [p. 140].)
[2366]. Friction grip pawl, as applied to a wheel, may be used also for a rod.
[2367]. Ratchet brace, or feed lever, in which the pawl is a fixed tooth, and the lever is slotted to allow the pawl to clear the teeth on the back stroke.
[2368]. Ratchet brace, with slotted pawl.
[2369]. Ratchet brace, with friction grip pawl.