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Internal Combustion and Air Compressing Engine

Description: Patent for internal combustion and air compressing engine. Illustration included.
Date: October 19, 1909
Creator: Risley, Ward & Risley, Zeph L.
Partner: UNT Libraries Government Documents Department

Rotary Reversible Engine

Description: Patent for rotary reversible engine. Illustrations included.
Date: October 19, 1909
Creator: Risley, Ward & Risley, Zeph L.
Partner: UNT Libraries Government Documents Department

Clamp.

Description: Patent for a new and improved clamp. This design "is for an improvement upon that class of inventions known as 'flooring jacks' or 'clamps,' and has for its object the lessening of labor for the attainment of the object or result which this is intended to perform, and the readiness and ease with which it can be manipulated" (lines 15-21).
Date: June 19, 1883
Creator: Sage, Eugene
Partner: UNT Libraries Government Documents Department
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