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US Patent: 137,052
Dies for Forming Wrench-Heads
Improvement in Dies for Forming Wrench-Heads
Luke Chapman - Collinsville, CT

USPTO Classifications:
72/356, 72/360, 72/374, 76/114

Tool Categories:
woodworking machines : specialty machines : tool making machines
wrenches : wrench components : wrench jaw components
tool making : making wrenches

Collins Co. - Collinsville, CT

Collins Co. - Collinsville, CT

Oliver F. Perry
Edward H. Sears
F. G. Fuller
H. B. Freeman

Patent Dates:
Granted: Mar. 25, 1873

Patent Pictures:
Luke Chapman Wrench Head Dies (Pat. Mar. 25, 1873)
USPTO pdf tiff
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The patent is for a set of dies to form heads on monkey wrench bars by upsetting. "My invention consists in dies and process for forming a wrench-head upon a bar of the width and thickness of the wrench-bar, requiring only unskilled labor and at a great reduction of cost." Pat. no. 137,053 is a complement.

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