[2283]. Spring pawl, locks the wheel against a moderate force, but gives way to a greater force.

Locked pawl motions. See [Section 62].

[2284]. Locking device for lathe headstock or tool rest. The head of the central pin runs in a T groove or under the lathe bed, and is clamped by the cone pointed set screw, which bears against a conical recess in the central pin.

[2285]. Radius bar, with notches to lock a hand lever in various positions. The lever may be hinged to lift out of the notches, or made thin enough to spring sufficiently for this purpose.

[2286]. Coned screw lock for a standard foot, pin, or socket and spigot.

[Larger plate.]

[2287]. Set screw fixing for needles, wires, cord, &c.

[2288]. Split block to grip a rod, with handle nut.

[2289]. Cam catch to lock a wheel or spindle.