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Wrench.

Description: Patent for a new and improved wrench with a "novel means for adjustably controlling the position of the movable jaw with respect to the stationary jaw" (lines 12-15), including illustrations.
Date: August 29, 1916
Creator: Parmer, Ernest W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lever-Operated Cutting Mechanism

Description: Patent for lever-operated cutting mechanism, that used leavers to provide a cutting surface that is both adjustable and can be reversibly held, including illustrations.
Date: August 21, 1900
Creator: Orr, William Oliver
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Hay-Press.

Description: Patent for hay presses with "a construction operable by horse-power in which the plunger will be operated as the sweep is moved in both directions and in which, furthermore, there will be an efficiency of operation and an economy of power" (lines 11-16).
Date: December 18, 1900
Creator: Bryant, Edward R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller-Bearing Swivel Wrench Plate.

Description: Patent for improvements on Roller-Bearing Swivel Wrench Plates, including illustrations. The goal of this invention is to make the plates more efficient "for use with any suitable fishing tool, or bit for use in oil fields or water well drilling" (lines 12-14).
Date: January 10, 1922
Creator: Harralson, Charles L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Polished-Rod Clamp.

Description: Patent for improvements in Polished-Rod Clamps that "quickly and easily attached to a rod without the use of tools" (lines 56-57) and "be easily operated at a distance from a pump" (lines 59-60).
Date: November 8, 1921
Creator: Weister, Edward P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Shaft Bearing.

Description: Patent for Improvements in Shaft Bearing. This bearing shaft is used to withstand heavy thrusts.
Date: August 24, 1920
Creator: Ball, Authur T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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