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US Patent: 589,765
Nut Wrench
Patentee:
Theodore F. Vandegrift (exact or similar names) - Shelbyville, IN

USPTO Classifications:
81/167

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : wrench components : wrench handle components

Assignees:
Vandegrift Manufacturing Co. - Shelbyville, IN

Manufacturer:
Vandegrift Manufacturing Co. - Shelbyville, IN
Monte Wrench Company - Shelbyville, IN

Witnesses:
Edward H. Chadwick
George H. Dunn

Patent Dates:
Applied: Nov. 14, 1895
Granted: Sep. 07, 1897

Patent Pictures: [ 1 | 2 ]
Theodore F. Vandegrift patent Sept. 7, 1897
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MONTE wrench (FLICKR)
Description:
The adjustable jaw is connected to the fixed jaw and handle by two parallel rods. The rod adjacent to the wrench opening is threaded. The adjusting knob is contained within the handle. The handle and adjusting knob are made of malleable iron. The wrench was made in several sizes, with the markings of several farm implement manufacturers, and either as an open loop handle, or with wood handle inserts.

The second photo shows several of these variants.

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