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Internal-Combustion Engine.

Description: Patent for an internal combustion engine for multi-cylinder engines, which has automatically opening valves powered by the exhaust gas.
Date: September 17, 1907
Creator: Thomas, Percy Frank
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Fluid-Operated Signal

Description: Patent for a fluid operated signal with illustrations. The device would allow communication between a train engineer and a caboose conductor through a device that utilizes the fluid-pressure brake system of the freight train.
Date: September 30, 1902
Creator: Bell, Chester L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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