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Pump Jack

Description: Patent for an improved double-acting pump jack that will require less parts and external force to operate and maintain.
Date: April 29, 1919
Creator: Lively, William
Partner: UNT Libraries Government Documents Department

Engine.

Description: Patent for a rotary engine with a coupled rotary shaft and piston. This engine uses a lubricant for keeping parts of the engine cool, including illustrations.
Date: April 29, 1919
Creator: Sheridan, Leslie M.
Partner: UNT Libraries Government Documents Department

Door Catch

Description: Patent for a new door catch design with an improvement to its locking system for the purpose of reducing injuries caused by the slamming of doors.
Date: April 29, 1919
Creator: Hughes, Stanley R.
Partner: UNT Libraries Government Documents Department

Shell.

Description: Patent for improvements to explosive projectile shells. Provides a shell adapted to contain gas and high explosives with constructed multi-layered shells with the intent to inflict as much damage as possible.
Date: April 29, 1919
Creator: Aoughsten, Richard G. & Aoughsten, Otto L.
Partner: UNT Libraries Government Documents Department

Drilling Apparatus

Description: Patent for a drilling apparatus able to simultaneously bore into objects and rearm itself.
Date: April 29, 1919
Creator: Layne, Mahlon E.
Partner: UNT Libraries Government Documents Department

Rotary Engine

Description: Patent for a rotary engine to be used as "a pump for liquids, as an air compressor, as a vacuum pump and for other purposes"(lines 10-12) including instructions for assembly and illustrations.
Date: April 29, 1919
Creator: Sheridan, Leslie M.
Partner: UNT Libraries Government Documents Department

Power-Transmitting Mechanism

Description: Patent for improvements in a power transmitting mechanism.
Date: April 29, 1919
Creator: Smith, Robert W. J.
Partner: UNT Libraries Government Documents Department

Farm-Tractor

Description: Patent for light-weight farm tractor that will be easy to maneuver. The patent includes information on the specifications and automotive components of the farm tractor.
Date: April 29, 1919
Creator: Rountree, Joseph G.
Partner: UNT Libraries Government Documents Department

Well Drilling Machine

Description: Patent for attachments related to machines that operate with a combination of derricks and cranes (e.g., well drilling, construction, and mine hoisting machinery, elevators, etc.) that will allow them to be more efficient and use less driving power.
Date: April 29, 1919
Creator: Dayton, William L. & Scott, John M.
Partner: UNT Libraries Government Documents Department

Chicken-Brooder

Description: Patent for an improved Chicken-Brooder that provide an improved brooder especially for outdoor use or independently of poultry house.
Date: April 29, 1919
Creator: Murray, Richard R.
Partner: UNT Libraries Government Documents Department
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