Collection
United States Census Map Collection
524
Texas Patents
494
USGS Topographic Map Collection
268
Texas State Publications
51
Texas Attorney General Opinions
17
Texas Laws and Resolutions Archive
14
Technical Report Archive and Image Library
2
Government Documents General Collection
2
Office of Scientific & Technical Information Technical Reports
1
Serial/Series Title
2000 Census County Subdivision Block Map
117
2010 Census County Block Map
105
2010 Census P.L. 94-171 County Block Map
104
2000 Census County Block Map
98
1990 Census County Block Map
97
7.5 Minute Series (Topographic)
97
Digital US Topo Maps: 7.5 Minute Series (Topographic)
64
15 Minute Series (Topographic)
35
Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
24
30 Minute Series
18
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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
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
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
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
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
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
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
Auto-Door Stop
Patent for a door stop that is cheap to produce and holds doors firmly.
Date:
November 3, 1908
Creator:
Hill, Ulysses H.
Object Type:
Patent
System:
The Portal to Texas History
Apparatus For Desulfurizing Matte Or Other Furnace Products
Patent for a new and improved apparatus for desulfuring matte or other furnace products.
Date:
November 9, 1897
Creator:
Wells, James L.
Object Type:
Patent
System:
The Portal to Texas History
Cleaning Apparatus.
Patent for a cleaning apparatus, which cleans objects by blasting air across them and has an air cleaning system for use after the cleaning is done.
Date:
June 1, 1909
Creator:
Mayo, William C. & Houlehan, John
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Utilizing Hot Slag for Heating Purposes
Patent for an apparatus which holds molten slag in the exterior chambers of the receptacle such that the interior chambers can receive water to be heated, producing steam and hot air.
Date:
September 11, 1900
Creator:
Wells, James L.
Object Type:
Patent
System:
The Portal to Texas History
Air-Lock for Mines and Tunnels
Patent for an air lock to remove water, polluted air, and heat from mines and tunnels and force in fresh air. Illustrations included.
Date:
September 8, 1908
Creator:
Durack, Partick H.
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Catching Waste Products From Lead, Silver, or Other Smelters.
Patent for certain new and useful improvements in apparatus for "catching the waste products from lead, silver , or other smelters" (line 5 - 7).
Date:
June 6, 1899
Creator:
Sergeant, Walter
Object Type:
Patent
System:
The Portal to Texas History
Aparejo
Patent for more efficient and durable pack-saddle (aparejo) used by United States Army. Casing involves hollow boot-sticks and rubber-encased steel, with better fitting to prevent fatigue of animal.
Date:
February 11, 1902
Creator:
Keller, John & Titsworth, Richard
Object Type:
Patent
System:
The Portal to Texas History
Combined Pen and Pencil Rack
Patent for a pen and pencil rack. Illustrations included.
Date:
November 26, 1907
Creator:
Twaddell, Janie S.
Object Type:
Patent
System:
The Portal to Texas History
Combined System of Electric Signaling and Switch Setting for Railroads
Patent for improved system of electric signaling and opening and closing rail systems.
Date:
April 17, 1906
Creator:
Wagner, Bruno Otto
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Oiling Railway-Tracks.
Patent for improvements in mechanism for “applying oil to curves and switches of street railway tracks” (lines 6-7) by using an “oil-tank [that] is arranged in the upper position of the hood or shield over the car-wheel. The valve is in the bottom of the oil-space and may be controlled by a lever arranged to turn or lift in the valve, and under the valve is arranged the oiling-wheel, which runs lightly on the track or face of the car-wheel and applied the oil." (Page 2, lines 69-76) Includes illustration.
Date:
August 4, 1891
Creator:
Ennis, Thomas L.
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Condensing Flue-Dust.
Patent for an apparatus for "condensing and saving the flue-dust passing with the waste gases through the chimney of lead-smelting furnaces." (Lines 9-12) Includes instructions and illustrations.
Date:
July 3, 1889
Creator:
Hizon, Hiram W.
Object Type:
Patent
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Bill 3475, Chapter 662
Bill introduced by the Texas House of Representatives relating to the statutory probate courts of El Paso County.
Date:
June 17, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
80th Texas Legislature, Regular Session, House Bill 4008, Chapter 1122
Bill introduced by the Texas House of Representatives relating to the creation of additional county criminal courts at law in El Paso County.
Date:
June 15, 2007
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
80th Texas Legislature, Regular Session, House Bill 868, Chapter 639
Bill introduced by the Texas House of Representatives relating to the recreational facility fee at The University of Texas at El Paso.
Date:
June 15, 2007
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Texas Attorney General Opinion: LO90-80
Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Questions about the validity of certain provisions in a contract between El Paso County and the El Paso Sheriff's Deputies Association.
Date:
October 24, 1990
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: DM-269
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Dan Morales, regarding a legal question submitted for clarification: Term of office of directors of the El Paso County Water Control and Improvement District (Westway), and related questions (RQ-479)
Date:
October 27, 1993
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History