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Ant Trap

Description: Patent for an ant trap designed as a ring-shaped trough and which allows for the drainage of rainwater through a pipe fitted with a porous plug. Both walls of the trough are capped with inward and downward curved flanges.
Date: August 1, 1922
Creator: Scrivner, Jefferson Davis
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Animated Sign

Description: Patent for a display apparatus to be implemented as animated advertising signs which successively display different images by controlling the timing of changes in the colors of light used to flood the front and to backlight the display surfaces. The images are created in such a way that certain elements created in certain colors become absorbed or are made invisible when illuminated by certain colors of light. An apparatus controls the cyclical changes of the colored lights used by the sign.
Date: September 5, 1922
Creator: Craig, Richard M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Article Holder or Stand.

Description: Patent for a device that conveniently and readily supports books, photographs, picture cards, and other similar articles. The new design is formed from a single strand of wire, and is specifically adapted for holding books in an open position and allowing the pages to be turned as needed.
Date: February 28, 1922
Creator: Boyette, Oren K.
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Partner: UNT Libraries Government Documents Department

Automatic Gas-Release Packer.

Description: Patent for automatic gas release packer that uses constant pressure regulated by spring-controlled valves for better control when lifting oil out of wells.
Date: April 11, 1922
Creator: Cummings, William J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Drift Valve.

Description: Patent for a drift valve for locomotive engines to effect automatic diversion of exhaust steam from the air pump to the smoke box, after the steam from the main throttle has been shut off.
Date: January 3, 1922
Creator: Gilman, Benoist P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automobile Headlight.

Description: Patent for an improved automobile headlight equipped with a movable lens and reflector to cast light down towards the roadway.
Date: November 14, 1922
Creator: Head, James M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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