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Nut Lock.

Description: Patent for a new and improved nut-lock. This design "is to produce a nut-lock which will require a minimum number of parts to adjust, will require no other tools than a wrench, which will stay where adjusted in spite of any amount of pounding or concussion, and which, when desired, may be removed without difficulty. To this end [the] invention consists in a nut provided with a serrated face and a washer having sharp spring-lips engaging with the serrations. [The] invention also consists in a pe… more
Date: December 6, 1887
Creator: Parks, John W.
Partner: UNT Libraries Government Documents Department

Electric Light Switch.

Description: Patent for an improved electric switch that is used to energize electric lights for various purposes and for use in connection with a signaling system. This switch will permit the energization of any one of the lights separately or all lights simultaneously.
Date: April 6, 1920
Creator: Riggs, Fletcher S.
Partner: UNT Libraries Government Documents Department

Scaffold

Description: Patent for scaffold. This scaffold is designed to be carried on toggles allowing it to raise and lower.
Date: October 6, 1903
Creator: Cheves, Merrell Autry
Partner: UNT Libraries Government Documents Department

Hoe.

Description: Patent for a new and improved garden hoe used for weeding purposes. The improvement is related to, "...the handle of the implement being hollow" (lines 11-12) and able to receive a quantity of seed, and a mechanism that controls the delivery of seed to the hoe.
Date: May 6, 1913
Creator: Etheridge, John B.
Partner: UNT Libraries Government Documents Department

Switch.

Description: Patent for an electric switch that is used in conjunction with a signaling device that allows for lights to be activated synchronously or asynchronously via the use of two levers.
Date: September 6, 1921
Creator: Riggs, Fletcher S.
Partner: UNT Libraries Government Documents Department

Shipping-Basket

Description: Patent for a shipping basket designed to keep contents secure and undamaged.
Date: September 6, 1921
Creator: Pitts, William L.
Partner: UNT Libraries Government Documents Department

Air-Brake

Description: Patent for an air brake for trains that reduces jerking when the brakes are applied.
Date: February 6, 1912
Creator: Mead, William E.
Partner: UNT Libraries Government Documents Department
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