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US Patent: 960,244
Manufacture of Screws
William G. Allen - West Hartford, CT

USPTO Classifications:
411/403, 411/919, 470/10, 470/16, 72/373, 76/114

Tool Categories:

William G. Allen - West Hartford, CT
Ira Dimock - West Hartford, CT

Allen Mfg. Co. - Hartford, CT

Harry R. Williams
Josephine M. Strempfer
Howard L. Holcomb

Patent Dates:
Applied: Jan. 09, 1909
Granted: Jun. 07, 1910

Patent Pictures: [ 1 | 2 ]
William G. Allen patent June 7, 1910
USPTO pdf tiff
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The patent describes a process to form sockets in the heads of screws, using an angular punch and round die. Allen Safety Set Screws which had no protruding heads were a primary application for the process; the process was also used to form socket headed screws of various types, pipe plugs, and detachable sockets for a variety of socket wrench sets. All these were produced and sold by the Allen Mfg. Co. of Hartford, CT. The hexagon wrenches for the socket headed screws gave us the generic "Allen wrench."

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