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Permutation Lock.

Description: Patent for a new and improved combination lock. This design's operation "is as follows: Being unlocked, the bolt is in the retracted position . . . [t]he door can then be operated in the usual manner, being held, when closed, by the ordinary spring-bolt. . . . When the door is closed, in order to lock it, the graduated knob is turned, operating the toothed disk and the first or governing ring, which will . . . throw out the end of the locking-bolt. By turning the handle, all the rings of the s… more
Date: April 17, 1883
Creator: Sarlls, Rutus & Holland, Virgil C.
Partner: UNT Libraries Government Documents Department

Draft Equalizer.

Description: Patent for improvement to draft-equalizers.
Date: April 17, 1900
Creator: Billington, Wesley E.
Partner: UNT Libraries Government Documents Department

Safety Air Brake Appliance

Description: Patent for " a safety air brake appliance for steam, traction or other railways, for each car" (lines 10-11). Including illustrations.
Date: April 17, 1914
Creator: Carpenter, Alfred A.
Partner: UNT Libraries Government Documents Department

Sad-Iron Heater.

Description: Patent for sad iron heaters: "a device for heating sad irons, and it has for its object to provide a heater adapted to receive a plurality of irons" (lines 8-11).
Date: April 17, 1894
Creator: Lee, William R.
Partner: UNT Libraries Government Documents Department

Headlight.

Description: Patent for improvement to headlights for cars.
Date: April 17, 1900
Creator: Wakefield, Charles L.
Partner: UNT Libraries Government Documents Department

Header.

Description: Patent for "new and useful improvements in Headers," including illustrations.
Date: April 17, 1917
Creator: Pritchett, William V.
Partner: UNT Libraries Government Documents Department

Dental Dam-Holder.

Description: Patent for improvement in dental dam-holders.
Date: April 17, 1900
Creator: Myers, Samuel M.
Partner: UNT Libraries Government Documents Department

Dehydrator.

Description: Patent for a continuous dehydrator that has specific use for gold and silver ores, including instructions and illustrations.
Date: April 17, 1917
Creator: Biesel, Charles
Partner: UNT Libraries Government Documents Department

Calculating-Machine.

Description: Patent for an improvement to mechanical calculators by providing the "means for facilitating the addition of successive numbers of the same or different denominations, and also for subtracting and multiplying the same by substantially the means employed in adding" (lines 10-14). It includes a written explanation and illustrations.
Date: April 17, 1894
Creator: Stallard, Sherman R.
Partner: UNT Libraries Government Documents Department

Piston Ring

Description: Patent for improvements to piston rings to reduce leakage through piston grooves, rings, and joints.
Date: April 17, 1920
Creator: Olsen, Jens J. & Edwards, Lewis E.
Partner: UNT Libraries Government Documents Department

Piston-Rod Connection

Description: Patent for a connector between a cross-head and a piston-rod that reduces strain by using a double taper and binder elements in line with the thrust of the piston-rod to prevent fractures and breaks as a result of the end thrust.
Date: April 17, 1906
Creator: McElvaney, Charles T.
Partner: UNT Libraries Government Documents Department

Self-Registering Target

Description: Patent for "new and useful improvements in self-registering targets, whereby the shots are plainly indicated, the parts are readily returned to their normal position after the shot is fired, and the whole combining simplicity, cheapness, and durability" (lines 13-18).
Date: April 17, 1888
Creator: Wright, Walter K. & Brown, William H.
Partner: UNT Libraries Government Documents Department

Slime-Pulp Thickener.

Description: Patent for a machine used in the wet milling process. It allows proportionate distribution of liquids to aide during the thickening process.
Date: April 17, 1923
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Buckle-Hook.

Description: Patent for a new buckle hook, specifically a back-band buckle for use with a harness that is "of simple and inexpensive construction designed to firmly grip the back-band or strap of the harness and retain the same in adjusted position" (lines 12-15), including illustrations.
Date: April 17, 1906
Creator: Reid, William W.
Partner: UNT Libraries Government Documents Department

Beet Harvesting Machine

Description: Patent for a machine that will harvest beets with only two operatives and not made of "heavy construction." Includes instructions and illustrations.
Date: April 17, 1913
Creator: Stone, John
Partner: UNT Libraries Government Documents Department

Bedstead Fastening.

Description: Patent for connecting legs to side rails of beadsteads.
Date: April 17, 1900
Creator: Rape, Augustus D.
Partner: UNT Libraries Government Documents Department

Bicycle-Support.

Description: Patent for a bicycle support which holds "bicycles in upright position when not in use" (lines 8-9).
Date: April 17, 1900
Creator: Taylor, James P.
Partner: UNT Libraries Government Documents Department

Collapsible Receptacle for Vehicles.

Description: Patent for an invention to improve collapsible receptacles for use in vehicles, more specifically wagons. Item is designed to be used on the spring seats of wagons for the purpose of storing items under the seat of wagons. Includes specifications and illustrations.
Date: April 17, 1900
Creator: Williams, Anderson D. & Walsh, Charles D.
Partner: UNT Libraries Government Documents Department

Air Brake Attachment.

Description: Patent for "mechanism for use in connection with railway cars for automatically controlling the air brakes," including instructions and illustrations.
Date: April 17, 1917
Creator: Flowers, Malon Inghram
Partner: UNT Libraries Government Documents Department
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