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US Patent: 378,585
Wrench
Self-Adjusting Wrench, Pliers or Pinchers
Patentee:
Walter Lee Gibson - Oviedo, FL

USPTO Classifications:
81/420, 81/422

Tool Categories:
wrenches : pliers type wrenches

Assignees:
Walter Lee Gibson - Oviedo, FL
James H. Lee - Oviedo, FL

Manufacturer:
Not known to have been produced

Witnesses:
F. McArdle
C. Sedgwick
I. W. C. Parker
J. M. Rice

Patent Dates:
Applied: Jun. 20, 1887
Granted: Feb. 28, 1888

Patent Pictures:
Walter Lee Gibson patent February 28, 1888
USPTO pdf tiff
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Description:
Pliers type tool with a pivoting jaw member providing two ranges of jaw opening sizes. The pivoting member and the jaw it attaches to have shoulders and stops to limit and align this motion.

Improved by patent no. 437,589.

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