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CA Patent: CA-43,855
Monkey Wrench
Patentee:
Edwin Sylvester Pratt (exact or similar names) - Parry Sound, ON Canada

USPTO Classifications:

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. G. McMillan
T. R. Cameron
H. Armstrong
M. E. McCurry

Patent Dates:
Applied: Mar. 01, 1893
Granted: Aug. 07, 1893

Patent Pictures: [ 1 | 2 ]
Edwin S. Pratt patent August 7, 1893
CIPO Data
Report data errors or omissions to steward Stan Schulz
Search Canadian Patents 1869-1894
43,855 in Canadian Patents Database
Description:
The adjusting screw is mounted on a pivoting plate so that it can be moved into and out of engagement with the rack teeth on the shank.

Pratt's occupation is given as Engineer. Corresponding U.S. patent no. 502,997 was issued August 8, 1893.

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