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US Patent: 550,698
Wrench
Patentee:
Carl Tinglof - Boston, MA

USPTO Classifications:
81/163, 81/177.1

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

Assignees:
None

Manufacturer:
Hardy and Carter - Boston, MA

Witnesses:
Francis C. Stanwood
John F. Nelson
H. E. Lodge

Patent Dates:
Applied: Aug. 06, 1894
Granted: Dec. 03, 1895

Patent Pictures: [ 1 | 2 ]
Carl Tinglof patent December 3, 1895
USPTO pdf tiff
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Description:
The movable jaw is adjusted by a "turnbuckle" type arrangement with a central adjuster on left- and right-handed threads -- the adjustment is "double speed."

Produced as "THE LEADER" bicycle wrench.

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