US Patent: 550,698


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US Patent: 550,698

Wrench

Patentee:

Carl Tinglof (exact or similar names) - 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

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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.