Patent Model - Improvement in Combination-Locks

Maker and role
John McCaskey, Patentee
Production date
Feb 29 1876
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Object detail

Wood, iron, brass
13 1/8 x 12 5/16 x 5 1/2" (33.3 x 31.3 x 14cm)
McCaskey's patent "consists in the combination of two sets of dials and tumblers, having notches and inclines, and a latch with projecting arm; also, in the combination of the tumblers, the slide with pins, the latch with arm and inclines, and a headed bolt with a notch..." (Patent Number 174,273)
Object number
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