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US Patent: 392,152
Wrench
Patentee:
John Alfred V. Gyllenberg - Hecla, MT

USPTO Classifications:
81/149

Tool Categories:
wrenches : pipe and nut combination wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
F. L. Ourand
Benj. G. Cowl
Wm. H. Rice
John L. Ricedorff

Patent Dates:
Applied: Apr. 28, 1888
Granted: Oct. 30, 1888

Patent Pictures:
John Alfred V. Gyllenberg patent October 30, 1888
USPTO pdf tiff
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Description:
The movable jaw adjusts by a clamping lever and fine rack teeth on the shank. The lever includes a small locking tooth.

The supplemental adjustment on the jaw surface is to make finer adjustment than is possible with the rack teeth on the shank.

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