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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

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
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