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Switch Attachment.

Description: Patent for a switch attachment that consists of a derailing guard, a side track rail, an adjustable shoe that pivots next to the rail, a vertical groove in the end of the shoe, and a swinging free arm.
Date: April 3, 1894
Creator: Warren, Governor D. & Casey, James
Partner: UNT Libraries Government Documents Department

Air-Compressor for Water-Elevators.

Description: Patent for "an improvement in air-compressors for water-elevators, and it consists in the novel mechanism for compressing air, by which water is designed to be raised from a cistern, or other reservoir." (Lines 13-17) Includes instructions and illustrations.
Date: December 10, 1895
Creator: Warren, Governor D.
Partner: UNT Libraries Government Documents Department

Automatic Railway-Gate.

Description: Patent for an automatic railway gate that consists of a picket shaft under the rails, cranks between the rails that are connected to the picket shaft, springs holding the shaft, tread rails that run along the rails and join the cranks, and guide blocks along each tread rail.
Date: February 13, 1894
Creator: Warren, Governor D.
Partner: UNT Libraries Government Documents Department

Mine-Door.

Description: Patent for an mine door that has an improved locking mechanism. A rope is strung through pulleys, and is operated by pushing a lever that moves the rope and the door swings open.
Date: March 6, 1894
Creator: Warren, Governor D.
Partner: UNT Libraries Government Documents Department