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US Patent: 518,041
James A. Lowe - North Branch, NJ

USPTO Classifications:
81/356, 81/361, 81/389, 81/427

Tool Categories:
wrenches : wrench components : wrench handle components
wrenches : nut wrenches


Billings & Spencer Co. - Hartford, CT

George Barry
Frederick Haynes
C. L. Sundgren

Patent Dates:
Applied: Jan. 22, 1894
Granted: Apr. 10, 1894

Patent Pictures: [ 1 | 2 | 3 ]
James A. Lowe patent April 10, 1894 (end adjustment)
USPTO pdf tiff
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The patented feature is a wedge and lever handle which applies "take-up motion" to account for minor variations in size between nuts or bolts that are nominally the same size. The patent is shown applied to two different styles of adjustable nut wrenches in the patent drawings. The specifications note the patent could be applied to a wrench with no other provision for adjustment. The wrench was manufactured as a 5-inch pocket wrench (size adjustment by end screw) with a catch to hold the lever handle closed to the main handle.

The wrench received Canadian patent no. CA-46,663 on July 26, 1894, and British patent GB-189407144 was registered April 10, 1894.

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