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US Patent: 618,245
Monkey Wrench
Maschil D. Converse - New York, NY

USPTO Classifications:
403/247, 81/129

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

Tower & Lyon - New York, NY

Not known to have been produced

J. Henry Kaiser
Edw. T. Kaiser
O. M. Ball

Patent Dates:
Applied: May 06, 1897
Granted: Jan. 24, 1899

Patent Pictures:
Maschil D. Converse patent January 24, 1899
USPTO pdf tiff
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Unique adjusting means using rollers in a looped channel. A lug on the main shank is the "fixed stop" and a toggle on the movable jaw provides an intermittent stop to hold the adjustment.

Converse's April 25, 1899 patent no. 623,946 has a similar movable jaw with a different quick adjustment means.

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