UNT Libraries Government Documents Department - 35 Matching Results

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Door.

Description: Patent for a door for bathrooms that adjoin two rooms that turns a partition door around 180 degrees when a person enters the bathroom and has locks to prevent the entrance of a person from the other room.
Date: April 5, 1910
Creator: Van Zandt, John H.
Item Type: Refine your search to only Patent

Food-Mixer.

Description: Patent for a food-mixer for stock feed composed of various chutes and parts for the mixing of large quantities of food stuffs, including specifications and illustrations.
Date: May 5, 1914
Creator: Egan, Mathew M.
Item Type: Refine your search to only Patent

Hydrostatic Indicator for Weighing Scales.

Description: Patent for a new and improved hydrostatic indicator for scales. This design consists in "a reservoir, an outer cylinder, a hollow inner cylinder, an attached stand-pipe, and registering-dial, said inner cylinder being surrounded by and sliding within said outer cylinder, said outer cylinder being provided with an attached inlet-pipe communicating with said reservoir, said pipe being provided with two valves, in combination with a bearing-bar, side rods, and under bar, forming a frame bearing up… more
Date: February 5, 1889
Creator: Lewis, Henry A.
Item Type: Refine your search to only Patent

Level-Indicator.

Description: Patent for a new and improved level indicator, intended for use with airplanes and other flying machines to indicate the angle of ascent or descent, as well as when the machine is on a level keel. The level indicator is designed to have a water-tight casing and weatherproof joints and has brackets to secure it to the airplane.
Date: November 5, 1918
Creator: Westbrook, Homer S.
Item Type: Refine your search to only Patent

Method of and Apparatus for Treating Mineral Pitch.

Description: Patent for an "improved method of and apparatus for treating mineral pitch and similar material to readily separate the asphalt and asphalt-oils from sand, bituminous rock, and other impurities contained in the mined material and removing the sand and impurities" (lines 12-17). The method circulates the material in hot water to separate the asphalt and asphalt-oils from the sand and impurities. The asphalt and oil rise to the top of the water and the impurities sink.
Date: November 5, 1895
Creator: Sellers, Harvey Lee; Conyngton, Hugh Ronald & Conyngton, Thomas
Item Type: Refine your search to only Patent

Plow.

Description: Patent for "heel sweeps" for plows, which are a construction of wings that that sweep the furrow on either side of the plow.
Date: January 5, 1915
Creator: Randolph, James W.
Item Type: Refine your search to only Patent
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