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Door-Spring.

Description: Patent for simple, inexpensive, and durable door springs meant to hold a door in place, and can be easily used.
Date: May 22, 1894
Creator: Wilson, James L.
Partner: UNT Libraries Government Documents Department

Cotton Loading Derrick.

Description: Patent for a new and improved cotton-loading derrick. This design consists in "[t]he portable derrick, comprising the barrow-base having the longitudinal handle-bars, the extended longitudinal and transverse base-sills, and the bearings, the rotary shaft or mast having the slot and sheave, the upper shoulder and upward-projecting stud, the cross-head, the oblique braces connecting its rear arm to the mast, and the derrick-pulleys suspended from the free arm of said cross-head, the rope passing … more
Date: April 22, 1890
Creator: Field, Eldon M.
Partner: UNT Libraries Government Documents Department
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