Section 87.—THROWING IN AND OUT OF GEAR.
[1574]. The driving wheel is loose on shaft, and is locked to its shaft by the hand wheel nut (see [No. 945]), or by a ratchet wheel and locking pawl.
[1575]. Two half-nuts are lifted in or out of gear with the screw by cam or lever motion. See [No. 942].
[1576]. One shaft runs in eccentric bearings, which can be revolved so as to throw it out of gear with the other shaft.
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[1577]. Radius bar and slot. The stud wheel can be shifted in or out of gear along the slot.
[1578]. Sliding back shaft, slides out of gear. See dotted lines.
[1579]. Method of throwing a pulley out of gear by slacking the belt. This is done either by a cam bearing or sliding motion to the driver shaft. Works best vertically. See also [No. 1219].
[1580]. Cam slot motion for back shaft. To throw it in or out of gear.
[1581]. Motion employed for punching machines, &c. To set the punch in or out of action by a cam and hand lever.