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US Patent: 164,100
Dynamic Wrench
Patentee:
Sebastian Plymale - Portland, OR

USPTO Classifications:
73/862.23, 81/180, 81/61, D8/25

Tool Categories:
wrenches : torque wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. B. Talbot
Rich'd M. Tabor

Patent Dates:
Applied: Feb. 25, 1875
Granted: Jun. 08, 1875

Patent Pictures:
Sebastian Plymale Pat. June 8, 1875
USPTO pdf tiff
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Description:
An internal set of levers, springs, and ratchet head converts movement of the ratchet head to an indication of force on a dial indicator. The wrench has a locking pin for the ratchet head, and a screw to pre-set the dial indicator. There is no provision for calibration.

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