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US Patent: 1,055,724
Pipe Wrench
Patentee:
Horace Levaunt Dickson - San Leandro, CA

USPTO Classifications:
81/102, 81/128, 81/142

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
R. L. Gregory
John B. Floyd

Patent Dates:
Applied: Jul. 08, 1912
Granted: Mar. 11, 1913

Patent Pictures: [ 1 | 2 | 3 ]
Horace L. Dickson Pat. Mar. 11, 1913
USPTO pdf tiff
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Description:
The spring pulls the jaw closed; cams on the handle segment act to lock the jaw adjustment and wedge gripping jaw segments against the pipe.

A known example of this wrench marked "Dickson Automatic 10 // Pat. Sept. 30, 1913" reflects Canadian patent number CA-150,764.

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