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US Patent: 2,206,251
Wrench
Patentee:
Friedriech Carl Fischer - DeWitt, NE

USPTO Classifications:
81/330, 81/384, 81/398

Tool Categories:
wrenches : pliers type wrenches : locking pliers
pliers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 25, 1939
Granted: Jul. 02, 1940

Patent Pictures:
F. C. Fischer Pat. July 2, 1940
USPTO pdf tiff
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Description:
This locking pliers is adjusted by a turnbuckle extending between a lug on the handle containing the fixed jaw, and the movable jaw. The pivot point is a bolt which slides in a slot in the handle with the fixed jaw. The pliers' adjustment would "lock" as the turnbuckle moved past dead center. Shoulders on the two handles provide a "stop" to limit the handles' movement toward each other. Fischer received a subsequent patent (no. 2366015) which completely re-worked the design.

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