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US Patent: 170,089
Wrench
Patentee:
Benjamin F. Joslyn (exact or similar names) - Worcester, MA

USPTO Classifications:
81/147, 81/171, 81/56, 81/DIG4

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

Assignees:
Richard P. Bruff - New York, NY

Manufacturer:
Not known to have been produced

Witnesses:
Harry Smith
Thomas McIlvain
Geo. B. Smith
S. B.I. Goddard

Patent Dates:
Applied: Sep. 19, 1874
Granted: Nov. 16, 1875

Patent Pictures:
Benjamin F. Joslyn Pat. November 16, 1875
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Description:
The movable jaw is both "quick" and screw-adjustable. The screw threads are wedge-shaped in cross section, and the movable jaw is held in contact with the screw by a spring in the back side of the movable jaw. By compressing the spring, the jaw can be moved in relation to the screw. The base for the adjusting screw is fastened to the main bar by a permanent wedge key and small keeper screw.

Joslyn's Dec. 7, 1875 patent (no. 170,860) is closely related.

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