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Dental Clamp.

Description: Patent for a dental clamp "for holding pins for securement to metallic cover-plates for fillings" (lines 8-10), with illustrations.
Date: January 29, 1901
Creator: Mayes, Robert Martin
Partner: UNT Libraries Government Documents Department

Gate

Description: Patent for an improvement of a mechanical operated gate. Illustration included.
Date: March 22, 1904
Creator: Burkhardt, John F.
Partner: UNT Libraries Government Documents Department

Revolving Case and Account Register

Description: Patent for revolving case and cash register. This device is designed as an account system and provides customers with and account book for keeping records. Illustrations included.
Date: June 25, 1912
Creator: Trenton, Albert E.
Partner: UNT Libraries Government Documents Department

Fly-Trap.

Description: Patent for a fly trap that is simple to make and use.
Date: February 13, 1912
Creator: Wallace, William Simpson
Partner: UNT Libraries Government Documents Department

Ice Making and Blocking Machine.

Description: Patent for a new and improved ice machine. This design consists in "the combination of a non-conductive casing containing a freezing tank having water supply and discharge pipes, a water-tight diaphragm supported in said casing above the bottom of said tank having downwardly-tapered hollows in its upper surface and corresponding upwardly-tapered molds in its under surface, and a refrigerating medium contained within the said casing over said diaphragm and filling the hollows in the latter" (lines 82-91).
Date: May 17, 1887
Creator: Knox, George F.
Partner: UNT Libraries Government Documents Department

Ice Machine.

Description: Patent for a new and improved ice machine. This design consists in "[a]n oil-trap for compression ice-machines, consisting of cylinders provided with inclined diaphragms, and having extensions provided with water-chambers and pipes extending down through the same" (lines 96-100). Said pipes are "to communicate with the cylinders, one of said pipes communicating with the extension of one of the cylinders and the other pipe leading from the ammonia-pump, said cylinders having a suitable arrangement of pipes and valves" (lines 1-6).
Date: August 31, 1886
Creator: Diener, Frederic
Partner: UNT Libraries Government Documents Department

Feed Water Heater.

Description: Patent for a new and improved water-heater. This design consists in "the combination of the supply-pipe, the supply-tank into which said pipe discharges, the said tank having a perforated bottom through which the water percolates, the vertically-divided cylinder forming the annular heating-chamber, the scatter-plates alternatingly located in diverse directions in said chamber, the said plates arranged to spray the water while heating as it falls from plate to plate, and the exhaust-steam pipe that discharges through an open port near the base of said annular heating-chamber" (lines 19-31).
Date: January 14, 1890
Creator: Knox, George F.
Partner: UNT Libraries Government Documents Department

Car-Coupling.

Description: Patent for a car coupling that consists of a pin, a lever, a catchbar, a drawhead that sits under the catchbar and guides it, a rack slide, and a curved lifter. It improves on a patent previously granted to the inventor (No. 437,734).
Date: June 27, 1893
Creator: Testard, Adrian
Partner: UNT Libraries Government Documents Department