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Huffman Quadrangle

Description: Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:31680
Date: 1920
Creator: Geological Survey (U.S.)
Item Type: Refine your search to only Map
Location: 30.06 -95.06
Partner: UNT Libraries Government Documents Department

Automatic Break-Setting Device.

Description: Patent for an automatic brake-setting device that provides an apparatus which is connected to a railway block signal to automatically release air and set the breaks of a train, in case the signal is ignored.
Date: August 7, 1923
Creator: Hardy, Samuel R. & Cochran, Royal A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Back-Up Post.

Description: Patent for a new kind of back-up post that is to be used in conjunction with a "drilling rotary on a derrick platform for screwing and unscrewing pipe sections" (lines 16-18) and which can be "easily and readily disengaged" (lines 42-43) from its wrench after use by its "retractable abutment" (page 2, line 3). Illustrations included.
Date: April 11, 1922
Creator: Martin, Robert Drury
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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