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[News Script: Hydraulic shear snips big trees]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering a news story about a hydraulic sheer developed by the Specialized Machinery Corporation of Austin being used to fell trees up to ten inches in diameter.
Date: December 14, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Mechanical Telegraph-Sounder

Description: Patent for "a sounder wherein a finger-lever and sounding-lever are combined together with a spring" (lines 13-15) and is "adapted for the use of learners for practicing the manipulation of a telegraph finger-key" (lines 8-10) including instructions and illustrations.
Date: June 22, 1880
Creator: Clopton, John B.
Partner: UNT Libraries Government Documents Department

Improvement in Cotton-Presses.

Description: Reissued patent for a new and useful improvement in cotton press: "The invention consists in operating the nut of a follower-screw by means of a drive-pinion, whose own shaft is actuated alternately in opposite directions, by a friction-wheel" (lines 13-16).
Date: March 31, 1874
Creator: Knowles, William Wadsworth
Partner: UNT Libraries Government Documents Department


Description: Patent for improvements in paper-files by using a "combination of a base board and a clamp provided with a jaw, a presser-foot provided with a bearing, a crank-shaft journaled in the bearing with its cranked portion under the clamp, and a hinged support or flap under the presser-foot." (Lines 75-80, p. 2) Papers can be held in position or remove by the raising or lowering the presser-foot. Illustration is included.
Date: August 18, 1891
Creator: Clopton, John B.
Partner: UNT Libraries Government Documents Department


Description: Patent for a switch stand that automatically switches to danger when unlocked and has independently rotating switch operating spindles and target spindles.
Date: October 19, 1915
Creator: Praetorius, Richard P.
Partner: UNT Libraries Government Documents Department