UNT Libraries Government Documents Department - 11 Matching Results

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Adjustable Friction-Grab for Fishing-Tools.

Description: Patent for friction grabs for fishing tools in well drilling operations that can be "easily adjusted for different sized holes or wells and which will be automatically adjusted and the grabs automatically closed on the object to be removed" (lines 14-17).
Date: May 24, 1921
Creator: Dickson, Lawrence E.
Item Type: Refine your search to only Patent

Car-Rail Hose-Bridge.

Description: Patent that provides a hose-bridge that is light in weight and simple in construction, that can be carried on the cars or stored at different points on the line convenient for use.
Date: January 24, 1921
Creator: Tyler, Charley P.
Item Type: Refine your search to only Patent

Condenser for Cotton-Presses.

Description: Patent for "Improvements in Condensers for Cotton-Presses," (lines 6-7) including illustrations. The invention is designed with cotton bale presses in mind, specifically the "condenser or bat forming device" (line 11).
Date: May 24, 1921
Creator: Taft, John A.
Item Type: Refine your search to only Patent

Coupling.

Description: Patent for a coupling to be used by military vehicles, unique in its "simplicity, rapidity in attachment and detachment, strength and durability" (lines 19-21).
Date: May 24, 1921
Creator: Speece, Russell. W.
Item Type: Refine your search to only Patent

Tractor.

Description: Patent for a tractor in which the placement of the power source reduces dead weight and provides a low center of gravity, thereby increasing stability.
Date: May 24, 1921
Creator: Martin, John J.
Item Type: Refine your search to only Patent
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