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US Patent: 793,257
Wrench
Patentee:
John Thomas Williams - Liverpool, England

USPTO Classifications:
81/409.5, 81/411

Tool Categories:
wrenches : pipe wrenches
wrenches : pliers type wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. P. Newman
H. M. Kuehne
Frank E. Fleetwood
Guy Ake

Patent Dates:
Applied: Sep. 27, 1904
Granted: Jun. 27, 1905

Patent Pictures:
John T. Williams patent June 27, 1905
USPTO pdf tiff
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Description:
This wrench is of the class known as "pipe grips." In this patent, the size adjustment is accomplished by a hinge pin engaging in one of a series of notches in the shank. The engagement is held by an internal spring. Two alternate arrangements are shown in the drawings.

Corresponding British patent GB-190321235 was registered Oct. 3, 1903.

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