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Device for Removing Broken Screws, &c.

Description: Patent for a new and improved device for removing broken screws. This design "is to provide a . . . bit specially designed for extracting screws, taps, screw-bolts, &c., from iron, marble, or other hard substances in case one of the said articles is broken off in the material into which it is screwed. The invention consists of a bit provided with an internal spiral cutting-thread and external cutters" (lines 7-15).
Date: September 10, 1889
Creator: Cahn, Maurice
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Partner: UNT Libraries Government Documents Department

Car Coupling

Description: Patent for a new and useful improvements in Car couples. This invention "relates to automatic car couples, and more particularly to that class known as " swing-pin" couples" (line 11 - 13).
Date: November 16, 1897
Creator: Gillespie, Charles W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Ant Trap.

Description: Patent for a new and improved ant trap. This design consists in "[t]he combination, with the side pieces, of the traps located between opposite ends of said side pieces and separated by an inclosed space, the openings communicating with said traps and the slides for closing said openings" (lines 61-66).
Date: January 18, 1887
Creator: Mays, Francis A.
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Partner: UNT Libraries Government Documents Department

Fire-Escape.

Description: Patent for a fire escape consisting of a basket that goes up and down the building to evacuate people from the building.
Date: December 27, 1910
Creator: Stuart, William C.
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Partner: UNT Libraries Government Documents Department

Boat-Propeller.

Description: Patent for a boat propeller, which is inexpensive and adaptable to small boats. The propeller can go forwards or backwards and use multiple oars.
Date: February 5, 1901
Creator: Caffey, John W.
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Partner: UNT Libraries Government Documents Department

Automatic Regulator for Pneumatic Flues

Description: Patent for a regulated valve to automatically maintain air pressure in a pneumatic conveyor flue. Excessive air pressure causes a secondary valve to open and vent the pressure while at the same time impeding air flow downstream.
Date: May 28, 1901
Creator: Caffey, Charles B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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