Chapter CL: Section 87: Throwing in and Out of Gear

(_See also p. 192._)

=2503. Presser foot for sewing machines,= or for intermittent holding of any flat articles; lifted out of gear, and held by the feather end resting on the sliding socket.

=2504. Belt shifting bar,= adjustable every way.

=2505. Revolving worm= for operating a belt shifting bar, locking it at the same time.

=2506. Worm gear= may be thrown out or in by moving the wheel sideways on its shaft.

=2507. Bolt and slot device= for gearing two wheels together on one shaft, used on lathe headstocks.

=2508. Half nut= for throwing out of gear, with screw, and fitted with spring to take up the wear of the nut.

=2509. Sliding shaft= for winch or other gear, to shift the pinion out of gear or change to another speed (as in No. 2293).

=2510. Another method= of locking a sliding shaft in or out of gear.