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Nut-Lock.

Description: Patent for a nut-lock that is meant to be screwed onto a bolt, threaded shaft, axle spindle, or other similar screws. The nut has an improved construction and a lock that consists of a tiny pin that must be pulled out before the nut can be unscrewed.
Date: September 19, 1893
Creator: Stewart, William Mills
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Rotary Engine.

Description: Patent for an improved, simple, and durable rotary engine that operates effectively and fully utilizes the motive. It consists of a central driving shaft, a cylinder with an annular bore, a piston that fits in the bore, an arm in the driving shaft, a divided packing-ring, a gate that slides in the bore, a cam mechanism, and a piston valve.
Date: September 19, 1893
Creator: Stone, Charles H. & Stone, Alonzo
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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