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Chapter XL
The Bullet Shooting Crossbow - English (Concluded)
The Lock and Sights
In a bullet crossbow, the lock and its casing are hinged to the metal
lever (5/16 in. thick), which bends the steel bow, fig. 122, p. 186.
The working parts of the lock consist of a tumbler, sear, lock-trigger
and spring. They are fitted between two steel side-plates, each about 1/8
in. thick. These side-plates form the casing of the lock.
Fig. 138 - The Pieces of the Lock. Half full size.
A, B, C, D, E, are each 5/16 in. wide transversely
where they work between the side-plates.
A. The tumbler, front and side view; its hook-shaped upper part forms
the
catch which holds the bow-string.
B. The sear.
C. The lock-trigger.
D. The lock-spring.
E. The peep-sight.
F. One of the side-plates.
G. One of the step-ended rivets that hold the side-plates together and
on which the pieces of the lock are hinged. |
