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US Patent: 640,610
Wrench
Patentee:
Clarence E. Williams (exact or similar names) - Worcester, MA

USPTO Classifications:
81/143

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
Walter H. Bruce - Worcester, MA

Manufacturer:
Not known to have been produced

Witnesses:
M. E. Regan
Harry M. Rugg
Louis W. Southgate
Philip W. Southgate

Patent Dates:
Applied: Oct. 09, 1899
Granted: Jan. 02, 1900

Patent Pictures: [ 1 | 2 ]
Clarence E. Williams patent January 2, 1900
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Description:
Cam lever and toothed plate quick adjustment; the distinctive feature is the asymmetric form of the toothed plate. This construction allows the clamping lever to lie close to the shank when in adjusted position.

An unmarked example of what appears to be a prototype came to light in Worcester; it has the adjustable jaw made of brass and shows evidence of "tweaking" the shape of the cam lever.

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