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US Patent: 331,189
Rapid Transit Wrench
Patentee:
James Du Shane (exact or similar names) - South Bend, IN

USPTO Classifications:
81/146, 81/170

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. E. Dowell
Phil. C. Dieterich
Ge. W. Matthews
Willis A. Bugbee
Patent Dates:
Applied: Jul. 15, 1885
Granted: Nov. 24, 1885

Patent Pictures:
James Du Shane patent November 24, 1885
USPTO (New site tip)
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Description:
The adjusting nut has wedge-shaped threads. The back side of the movable jaw has a spring that keeps the adjusting nut engaged with the rack on the main shank. For rapid adjustment, pushing on the back of the movable jaw to compress the spring allows free movement of the movable jaw.

Du Shane had a second parallel patent for another form of rapid-transit wrench (pat. no. 331,188).

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