US Patent: 296,942


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US Patent: 296,942

Wrench

Patentee:

James Du Shane (exact or similar names) - South Bend, IN

USPTO Classifications:

81/137, 81/175, 81/DIG.4

Tool Categories:

wrenches : wrench adjustment types : screw adjust wrenches

wrenches : wrench adjustment types : quick adjust wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Nov. 30, 1883
Granted:	Apr. 15, 1884

Patent Pictures:

James Du Shane patent April 15, 1884

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Description:

The wrench has a two-part screw adjustment. The smaller screw works similarly to a "typical" adjusting screw, except that its range of motion is less than the overall adjustment range of the wrench. The larger nut has interrupted threads so that when the gap in its threads align with the main bar of the wrench the movable jaw is free to slide.