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in subjects: "screws"  
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Wrench.

Description: Patent for an improved wrench that has two movable jaws and can separate about the length of the handle. The wrench's "head or nut for operating the upper jaw is swiveled and forms a part of the handle" (lines 14-15). The wrench can be converted into a pipe-wrench.
Date: May 9, 1893
Creator: King, Will Henry Thomas
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Screw.

Description: Patent for a new and improved screw. This design consists in "[a] screw, the body and shank of which are of corresponding diameter throughout their length, the shank terminating in a rounded end, and the shank and body being provided with a longitudinal straight channel extending throughout their lengths, one of the terminal shoulders of the channel being removed" (lines 4-10).
Date: June 10, 1890
Creator: Ericson, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roof Screw.

Description: Patent for a new and improved roof screw. This design consists, "[a]s a new article of manufacture, [in] a screw consisting of a threaded shank having an integral head, an enlarged collar or flange on said shank below the head thereon, and an elastic cushion on the shank immediately below the enlarged collar or flange, for the purpose described" (lines 60-66).
Date: September 23, 1890
Creator: Corley, Daniel B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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