Improved Hiller Gun Lock

The Scientific American - July 1881

The accompanying engravings represent one of the simplest and most compact gun locks that has yet been devised.

The main sprint, a, is coiled around the shaft, b, to which the cock, c, is rigidly secured ; the tumbler, d, being slipped upon the same shaft, and held in place by a set screw. This mode of securing the tumbler enables the sweep of the cock or length of arc through which it moves, to be varied and adjusted, so as to give a blow of any force desired. The trigger, e, is pressed into the notches in the tumbler, by a spring, f, which may be spiral, as represented in the cut, or of the usual straight form.

The manifest advantages of this lock are its exceeding cheapness, compactness and simplicity. It is easily taken apart and put together, and if the mainspring or either of its other few pieces should be broken, it could be quickly and cheaply replaced.

The patent for this invention was granted April 80th, 1861.