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The Padlock Patent Archive

Three centuries of keeping things shut

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1870 patent

Patent drawing of an umbrella handle with a curved crook top, showing a cutaway of the internal locking tube, spring-catch hooks, and cylindrical key, plus a small circular cross-section below labeled Fig. 2.

IMPROVEMENT IN LOCKS FOR UMBRELLASHiram Plumb · January 11, 1870

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