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in subjects: "safety features"  
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Train-Order Signal.

Description: Patent for a train order signal, which prevents accidental clear signals from the semaphores by requiring the train order pad to be replaced before a signal can be given.
Date: May 18, 1909
Creator: Gates, William T.
Partner: UNT Libraries Government Documents Department

Safety-Elevator.

Description: Patent for a elevator with a safety feature to prevent the car from falling rapidly to the bottom of the shaft if a cable breaks.
Date: March 8, 1910
Creator: Dunlap, Henry William & Lumbley, Joseph Slater
Partner: UNT Libraries Government Documents Department

Safety-Dog Trip for Cotton-Presses.

Description: Patent for a safety dog trip for cotton presses, which automatically removes the dog rods holding the cotton out of the press when it is sent up for pressing.
Date: October 19, 1909
Creator: Wright, John C.
Partner: UNT Libraries Government Documents Department

Electric Signal

Description: Patent for an alarm device to indicate overheating of an internal combustion engine.
Date: June 1, 1915
Creator: Lièvre, Joseph
Partner: UNT Libraries Government Documents Department
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