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 15.—CLUTCHES.

[278]. Common jaw clutch sliding on a feather key, the loose half being cast on the boss of a wheel.

[279]. Two forms of jaws for ditto.

[280]. Cone clutch. Screw gear should be used to operate this, as it is liable to “seize,” and there is considerable end pressure on the shaft to be allowed for.

[281]. Face (friction clutch) with V grooves. See remarks to [No. 280].

[282]. Friction clutch with three or more segments. See also [Nos. 38] and [59].

[283]. Pin and hole clutch. The pin and holes can of course be made parallel to the shaft instead of radial.

[284]. Cam clutch, used for dexter treadles, also for reciprocating motions driving one way and running loose the opposite way. See also [Section 62], [Nos. 1135], [1178], &c.

[285]. Crank pin and arm driver.

[286]. Pickering’s self-sustaining clutch for hoists. The box A only is keyed to the shaft, and drives the chain wheel and sleeve B by jamming it with the flange of the ratchet-wheel sleeve C by the sliding action of the toothed faces formed at D on the disc and flange of the sleeve B, these teeth being of the ratchet form.

Several other forms of this clutch are in use. Edwards’, Stevens and Major’s, and others may be consulted.

[287]. Disc friction clutch, with intermediate leather discs and screw clamping appliance, only the central disc is keyed to the shaft, the others run loose. Mather and Platt’s and Addyman’s patent friction clutches are examples.

Numerous forms of friction clutches are in use, modifications chiefly of [Nos. 38], [59], and [282]. See also [Section 5].

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