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

[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.

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Section 88.—VARIABLE MOTION AND VARIABLE POWER.

For variable speed and power by spur gear, see [Sections 84] and [40].

For variable speed and power by bevil gear, see [Section 84].

For variable speed and power by cam gear, see [Section 9].