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US Patent: 1,378,209
Wrench
Patentee:
Jerome E. Bergman - Buffalo, NY

USPTO Classifications:
81/165, 81/177.1, 81/DIG3

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

Assignees:
None

Manufacturer:
Bergman Tool Mfg. Co. - Buffalo, NY

Witnesses:
none listed

Patent Dates:
Applied: May 08, 1919
Granted: May 17, 1921

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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Description:
The drawing shows a curved handle adjustable open end wrench like those manufactured by Bergman. The main feature of the patent is a friction adjustment lock. This adjustment lock was not included in the Bergman Queen City line of curved handle adjustables.

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