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United States Census Map Collection
524
Texas Patents
494
USGS Topographic Map Collection
268
Texas State Publications
48
Texas Attorney General Opinions
17
Texas Laws and Resolutions Archive
14
Technical Report Archive and Image Library
2
Government Documents General Collection
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Office of Scientific & Technical Information Technical Reports
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2000 Census County Subdivision Block Map
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2010 Census P.L. 94-171 County Block Map
104
2000 Census County Block Map
98
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97
7.5 Minute Series (Topographic)
97
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20-kW Solar Photovoltaic Flat-Panel Power System for an Uninterruptible Power-System Load in El Paso, Texas. Phase Ii. System Fabrication. Final Report October 1, 1979-May 31, 1981
The system plans, construction, integration and test, and performance evaluation are discussed for the photovoltaic power supply at the Newman Power Station in El Paso, Texas. The system consists of 64 parallel-connected panels, each panel containing nine series-connected photovoltaic modules. The system is connected, through power monitoring equipment, to an existing DC bus that supplies uninterruptible power to a computer that controls the power generating equipment. The site is described and possible environmental hazards are assessed. Site preparation and the installation of the photovoltaic panels, electrical cabling, and instrumentation subsystems are described. System testing includes initial system checkout, module performance test, control system test. A training program for operators and maintenance personnel is briefly described, including visual aids. Performance data collection and analysis are described, and actual data are compared with a computer simulation. System drawings are included. (LEW)
Date:
December 1, 1981
Creator:
Risser, V.V.
Object Type:
Report
System:
The UNT Digital Library
Calcining-Furnance.
Patent for updates to "calcining-furnaces", specifically several original and new parts, including illustrations.
Date:
July 31, 1900
Creator:
Hughes,Godfrey
Object Type:
Patent
System:
The Portal to Texas History
Bridle-Rod for Railroad Rails
Patent for a system of attaching railroad rails when the rails are first placed. This device is used to keep the rails a precise distance apart before the railroad spikes are placed into the ground holding the rails firmly in place.
Date:
February 10, 1903
Creator:
Johnson, John
Object Type:
Patent
System:
The Portal to Texas History
Car-Truck.
Patent for a car truck for use on trains, which can withstand heavy loads and high speeds.
Date:
August 25, 1908
Creator:
Mayo, William C.
Object Type:
Patent
System:
The Portal to Texas History
Automatic Air-Brake Coupling.
Patent for "a new and useful improvements in automatic air-brake couplers to enable others skilled in the art to make and use the same, the invention also relates to improvements in automatic air-brake couplings in cars". (lines 5-10) including instructions and illustrations.
Date:
July 17, 1900
Creator:
Cary, Lewis C.
Object Type:
Patent
System:
The Portal to Texas History
Cotton-Chopper
Patent for a cotton chopper that can be used for cultivation.
Date:
March 21, 1911
Creator:
Crow, Jesse J.
Object Type:
Patent
System:
The Portal to Texas History
Corn-Popper
Patent for a corn popper used for popping corn and general cooking. Illustrations included.
Date:
June 25, 1907
Creator:
Young, G. B.
Object Type:
Patent
System:
The Portal to Texas History
Corn-Popper
Patent for a corn popper. Illustrations included.
Date:
June 25, 1907
Creator:
Young, George B. & Young, Joseph H.
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Sizing Ores or for Other Uses
Patent for an apparatus for sizing ores. This invention is to "accomplish and accurate or approximately accurate sizing or classification of ores or granular materials in a rapid and thorough manner and with as large a capacity as possible" (line 15-19) illustrations included.
Date:
June 23, 1903
Creator:
Swain, Seth Russell
Object Type:
Patent
System:
The Portal to Texas History
Billiard Cue
Patent for an improved billiard cue with a tip that can be quickly and easily removed and replaced by another and that will be adapted to hold a quantity of powdered chalk for use when needed.
Date:
August 30, 1898
Creator:
Farrand, James W.
Object Type:
Patent
System:
The Portal to Texas History
Air-Cleaning System
Patent for an air cleaning system to be used in homes. Illustrations included.
Date:
April 20, 1909
Creator:
Mayo, William C. & Houlehan, John
Object Type:
Patent
System:
The Portal to Texas History
Automatic Ore And Slime Separator
Patent for a automatic ore and slime separator. This invention is designed to separate the sand and other solid particles from water. Illustration included.
Date:
March 15, 1904
Creator:
Allen, Charles
Object Type:
Patent
System:
The Portal to Texas History
Combined Street-Car and Air-Brake Coupling
Patent for a combined street-car and air-brake coupling.
Date:
February 10, 1903
Creator:
Cary, Lewis C.
Object Type:
Patent
System:
The Portal to Texas History
Annuciator
Patent for an annunciator. "This invention is designed for use in connection with a complete traction system" (lines 13-14). The design drives instruments via a train air system so that air pressure is constantly maintained. Illustrations included.
Date:
February 18, 1908
Creator:
Mayo, William C.; Houlehan, John & Briggs, George E.
Object Type:
Patent
System:
The Portal to Texas History
Attachment for Thimbles.
Patent for invention for the improvement of attachments for thimbles. "The objects of the invention are to produce a device of simple construction for cutting the thread when sewing that can be readily applied to old as well as to new thimbles; also to produce the device in such manner that the thread can be quickly and conveniently cut at any desired point in an expeditious manner " (lines 17-24). Includes specifications and illustrations.
Date:
May 1, 1900
Creator:
Brown, Archie Edwards
Object Type:
Patent
System:
The Portal to Texas History
Corn-Popper
Patent for a corn popper that can also be used for roasting nuts or for general cooking. Illustrations included.
Date:
December 31, 1907
Creator:
Young, George B. & Young, Joseph H.
Object Type:
Patent
System:
The Portal to Texas History
Car-Wheel
Patent for a car wheel made to ease turning on rounding corners and to prevent slipping due to differences in wheel sizes.
Date:
February 18, 1908
Creator:
Mayo, William C. & Houlehan, John
Object Type:
Patent
System:
The Portal to Texas History
Billiard Cue
Patent for a billiard cue. This invention is designed with removable tips. Illustration included.
Date:
April 4, 1911
Creator:
Borroughs, John Vertie
Object Type:
Patent
System:
The Portal to Texas History
Controlling System for Motor Traction-Cars
Patent for a controlling system for motor traction cars which is automatic.
Date:
November 1, 1910
Creator:
Mayo, William C.
Object Type:
Patent
System:
The Portal to Texas History
Cover for Culinary Utensils.
Patent for improvements in covers for culinary vessels in which “the cover will confine the odors arise from the vessel and at the same time the steam may be allowed to escape at any time without removing the cover from the vessel.” (Lines 16-20) Illustration is included.
Date:
January 11, 1910
Creator:
Reeves, Bell N.
Object Type:
Patent
System:
The Portal to Texas History
Coffee Urn
Patent for a coffee urn. This invention is designed to percolate liquid repeatedly through the grounds to increase the strength of the coffee. Illustration included.
Date:
March 2, 1909
Creator:
Nenninger, Oscar A.
Object Type:
Patent
System:
The Portal to Texas History
Crude-Oil Burner
Patent for a crude oil burner for stoves that does not smoke when it is turned on.
Date:
May 28, 1912
Creator:
Dawson, Oliver B.
Object Type:
Patent
System:
The Portal to Texas History
Air-Brake, Lighting, and Signaling System for Railway-Trains
Patent for an electrical system which provides air brake, lighting, and signaling mechanisms for trains. Illustrations included.
Date:
February 18, 1908
Creator:
Mayo, William C. & Houlehan, John
Object Type:
Patent
System:
The Portal to Texas History
Automatic Ore and Pulp Sampler
Patent for a automatic ore and pulp sampler. This invention represents a settling tank to accumulate particles. Illustration included.
Date:
March 15, 1904
Creator:
Allen, Charles
Object Type:
Patent
System:
The Portal to Texas History