UNT Libraries Government Documents Department - 12 Matching Results

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Tire Construction

Description: Patent for an improvement to rubber tires. The inner tube is enclosed within a thick detachable shoe to withstand shocks and jars, and also uses side guards to protect from dirt accumulation.
Date: November 25, 1919
Creator: Luck, John J.
Item Type: Refine your search to only Patent

Switch Operating Mechanism for Electric Railways.

Description: Patent for a switch-operating mechanism for electric railways that uses a movable display band to control movement through an electrically operated switch. The arrival of the railway car or street car at a point adjacent to the switch automatically throws the switch to automatically shunt the car from one line to another without a motorman or switchman's intervention.
Date: May 25, 1915
Creator: Craig, Richard M.
Item Type: Refine your search to only Patent

Door Operating Means

Description: Patent for a mechanism to operate jail doors. The mechanism is "operated with a single movement of the hand to open and close a plurality of doors simultaneously" (14-19). Illustrations included.
Date: June 25, 1912
Creator: Youngblood, David Franklin
Item Type: Refine your search to only Patent
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