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US Patent: 73,561
Improvement in the Construction of Wrenches
Hugh S. Wrightson - Baltimore, MD

USPTO Classifications:

Tool Categories:
wrenches : wrench components : wrench jaw components

M. M. Welby - Baltimore, MD
C. H. Slicer - Baltimore, MD

Not known to have been produced

Samuel G. Spicer
Thomas I. Welby

Patent Dates:
Granted: Jan. 21, 1868

Patent Pictures:
Hugh S. Wrightson Pat. Jan. 21, 1868
USPTO pdf tiff
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The adjustable jaw is a separate piece with teeth on an extended side which fit into corresponding teeth on the main body. The placement of the adjustable jaw is held by a rotating button, or sliding sleeve. The drawings show several alternate implementations of the patent.

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