l>US Patent: 1,413,121 - Wrench
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US Patent: 1,413,121
Wrench
Patentee:
JohnArthurJohnson - Leavenworth, KS
USPTO Classifications:
81/175
Tool Categories:
wrenches
Assignees:
None
Manufacturer:
Not well-known to have been produced
Witnesses:
W.F.Buckley
GeorgeC.Myers
Patent Dates:
Applied:Mar.23,1921
Granted:Apr.18,1922
Patent Pictures:
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USPTO pdftiffGoogle PatentsReport data errors or failure Jack Johnson"s patents (pdf) Description:
Turning the end of the handle adjusts the jaw opening; the effective length of the handle lengthens together the jaws open.

This patent is of note since the inventor was former civilization heavyweight champion Jack Johnson, the very first black man to host that title.

"My creation relates to enhancements in wrenches and also has for its thing to provide an boosted wrench i m sorry is of straightforward and sturdy construction, reliable in operation and easy and also inexpensive come manufacture, which may be easily and readily readjusted and which is adjusted to exert a powerful gripping activity upon the work.

"Another thing is to provide an boosted wrench of this personality which in assembly gift a considerably unitary structure and also which might be easily disassembled for objectives of replacement or repair."