US Patent 635,291 · 24 Oct 1899

Screw-door safe

by Charles E. Blechschmidt

Patent drawing of a screw-door safe on castors seen from the front, with a round door, a central dial and spoked handles, and sections through the door bearing
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Charles E. Blechschmidt's screw-door safe, US patent 635,291 of 24 October 1899, assigned to the Victor Safe and Lock Company (detail). Public domain, via Google Patents.

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Same maker or decade

1888 Permutation lock with combination changer

1890 Drill-proof plate behind the lock

1891 Time lock

1894 Seamless welded safe body

1908 Shield over the screw-door joint

← 1894 Seamless welded safe body All patents 1903 Fire and water proof safe door →