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Insulator.

Description: Patent for an insulator for water pipes that conducts away electric current to be utilized elsewhere.
Date: December 25, 1917
Creator: Stone, Oscar Otto
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lineman's Chair

Description: Patent for a chair which allows a lineman to connect cables and lines more easily. Illustrations included.
Date: October 25, 1910
Creator: Davis, John W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Paper File and Binder.

Description: Patent for a paper file and binder, which is expandable for varying amounts of pages and holds the papers firmly in the binder, but also allows easy removal.
Date: January 25, 1910
Creator: Springall, Walter A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Spark-Arrester

Description: Patent for a spark arrester designed to extinguish the glowing cinders of smoke stacks. Illustrations included.
Date: October 25, 1910
Creator: Goodrich, Luman L., Jr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

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
Partner: UNT Libraries Government Documents Department

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
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.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

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
Partner: UNT Libraries Government Documents Department
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