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Machine for Mixing Mortar.

Description: Patent for a new and improved machine for mixing mortar. This design "consists in a cylinder composed of bars set into open heads and rotating beneath a hopper . . . so that the material to be mixed rests upon the cylinder, and is rasped or grated off by the motion of the cylinder and received on the inside of the cylinder between the bars. . . . When the material is received inside the cylinder it is carried around by the rotary motion, and is turned over and forced out" (lines 7-22).
Date: September 14, 1880
Creator: Schellenberger, Samuel L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Primer for Cannon.

Description: Patent for a new and improved primer for cannons. This design corrects the loosening of primers in their vent-holes by way of "a spring combined with the priming tube, which spring expands to the size of the vent" (para. 3). This eliminates blowouts and premature breakage.
Date: September 14, 1880
Creator: Rodman, John Black
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Spoke Socket.

Description: Patent for a new and improved vehicle wheel for "preventing the tire from becoming loose" and "preventing the loosening and rattling of the spokes" (lines 8-11). This design achieves these feats with conically-tipped spokes encased by rubber cushions.
Date: September 14, 1880
Creator: Harrington, John A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Finger-Exercising Machine.

Description: Patent for a finger-exercising machine that is meant to improve the finger strength and flexibility of musicians. "A cylinder provided with friction-rollers imparts motion to a set of keys upon which the fingers are placed; and the object of [the invention] is to impart flexibility to the fingers, and to overcome the otherwise difficult motion" (lines 11-16).
Date: September 14, 1880
Creator: Becker, Francis L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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