Figure 76.
Figure 77.
Nomenclature of the Gun Stock.—Fig. 76 shows a gun stock with the locks, plates and other metal portions removed, a, is the butt; b, the small or handle; c, the head; d, the bump; e, the comb; f, the toe; g, lock-bed; h, fore-end or fore-arm; i, pistol-grip; k, cap or end of pistol-grip; l, tip of fore-end; m, escutcheons; n, mortice for bolt; o, chequering.
Figure 78.
Figure 79.
Nomenclature of the Gun Lock.—The number of pieces in a common gun lock, as shown, are thirteen, and are fully illustrated in the cut, Fig. 77. A, is the lock-plate; B, the hammer; C, mainspring; D, the bridle; E, the tumbler; F, the sear; G, the sear-spring; H, the swivel or stirrup; I, the sear-spring screw; K, K, K, the bridle screws; L, hole for side-screw. In some locks there are only two bridle screws. In others a screw holds the mainspring to place instead of a lip catching under the stud.
Figure 80.
Figure 81.
Nomenclature of the Hammer.—The names of different parts of the hammer, Fig. 78, are: a, the body; b, the head; c, the comb; d, the nose; e, the cup; f, tumbler-hole.
Figure 82.
Nomenclature of the Lock-Plate.—The names of different portions of the lock-plate, Fig. 79, are: a, the bolster; b, mainspring-catch; c, hole for mainspring-pivot; d, hole for side-screw; e, hole for arbor of tumbler; f, hole for sear-screw; g, hole for sear spring-screw; h, slot for sear-spring stud; i, i, holes for bridle screws.
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.
Figure 86.
Nomenclature of the Sear.—The sear, Fig. 83, consists of: a, the body; b, the nose; c, the arm; d, screw-hole.
Nomenclature of the Sear-Spring.—The sear-spring, Fig. 84, consists of: a, the blade; b, upper branch; c, lower branch; d, the stud; e, screw-hole.
Nomenclature of the Swivel.—The mainspring-swivel or stirrup, Fig. 85, consists of: a, the body; b, the axis; and c, the tumbler-pin hole.
Nomenclature of the Breech-Pin.—Fig. 86 shows full size of musket-barrel breech-pin. a, plug with threads; b, tenon; c, tang; d, tang-screw hole; e, face.
In sporting guns the tang is often called the “strap,” and is distinguished as long and short. The length varying from two and a half inches as shortest, and five inches as the longest. Sometimes the term “tail” is employed instead of tang or strap. The diameter of the plug is generally one-half, five-eighths, and three-quarters of an inch. The diameter of the pin used in United States muskets and rifles is three-quarters of an inch.
Nomenclature of Screws.—In all the screws, the parts are the stem, the head, the slot and the thread.