Figure 83.
Figure 84.
Nomenclature of the Tumbler.—The names of the tumbler, [Fig. 80], are: a, the body; b, arbor; c, squares; d, pivot; e, swivel arm; f, pin-hole, and g, the tumbler-screw hole.
Nomenclature of the Bridle.—The bridle, [Fig. 81], consists of: a, the body; b, the eye for tumbler-pivot; c, hole for sear-screw; d, d, holes for bridle screws. Some tumblers have a pin that goes in a hole in the lock-plate, and this pin is called a pivot.
Figure 85.
Nomenclature of the Mainspring.—The mainspring, [Fig. 82], consists of: a, the upper branch; b, the lower branch; c, the hook; d, the pivot; e, the catch which is sometimes called the tang.
