UNT Libraries Government Documents Department - 12 Matching Results

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Calculator.

Description: Patent for a calculator "in which a bar having a series of numbers thereon slides in a frame or base also provided with a series of numbers" (lines 10-12). It is meant for quickly adding numbers.
Date: October 13, 1896
Creator: Copeland, Wesley Albert & Roberts, Cyrus
Item Type: Refine your search to only Patent

Car-Door Cleat and Fastener.

Description: Patent for "a simple and comparatively-inexpensive car-door cleat and fastener designed for use on cars for transporting cotton and other highly-inflammable merchandise and capable of effectually excluding sparks from the interior of the car and of preventing the same from entering between the edge of the door and the doorway." (Lines 11-18) Includes instructions and illustrations.
Date: October 22, 1895
Creator: Woodruff, Hawkins
Item Type: Refine your search to only Patent

Double-Action Pump

Description: Patent for "double-action submerged force-pumps which can be operated by any suitable power, but particularly adapted for operation by windmills provided with variable gearing...simple in construction and strong and durable and in which there are no parts which can be disarranged during operation and from which all valves may be removed without disturbing the pipe and which will maintain a continuous flow of water during operation."
Date: October 21, 1902
Creator: Byars, Edgar
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Force-Pump.

Description: Patent for a simple, inexpensive, and efficient double action force pump that has one cylinder and one plunger. It also equalizes the opposite strokes of the plunger, and pushes water into the common chamber with both strokes.
Date: October 2, 1894
Creator: Thompson, John W.
Item Type: Refine your search to only Patent

Insect-Destroyer.

Description: Patent for an insect destroyer, specifically made for the boll weevil insect. The purpose of the Insect-Destroyer is to provide a cheaper, simpler, and more convenient alternative to the existing boll weevil insect destroyers.
Date: October 30, 1917
Creator: Clement, Auther H.
Item Type: Refine your search to only Patent

Stalk Breaker

Description: Patent for breaking cotton stalks. This device is designed to break down cotton stalks while sparing stalks of growing young wheat. Illustration included.
Date: October 27, 1908
Creator: Shaw, Drury P. & Tackaberry, W. J.
Item Type: Refine your search to only Patent
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