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US Patent: 154,680
Wrenches
Patentee:
Benjamin F. Joslyn - Worcester, MA

USPTO Classifications:
81/140, 81/158

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. Henry Hill
David F. Parmenter

Patent Dates:
Applied: Jan. 02, 1874
Granted: Sep. 01, 1874

Patent Pictures:
Benjamin F. Joslyn Pat. Sept. 1, 1874
USPTO pdf tiff
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Description:
The adjusting screw's threads are tapered, and the screw's engagement with the rack is held by a spring. This allows for quick adjustment as well as screw-adjustment.

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