Collection
Texas Patents
541
Technical Report Archive and Image Library
143
National Advisory Committee for Aeronautics Collection
125
USDA Farmers' Bulletins
35
USGS Topographic Map Collection
27
Government Documents A to Z Digitization Project
12
The Federal Reporter
8
Texas Soil Surveys
4
United States Experiment Station Record
4
Texas State Publications
2
4 More
Serial/Series Title
NACA Technical Memorandums
52
NACA Technical Notes
46
NACA Technical Reports
26
Farmers' bulletin (United States. Dept. of Agriculture)
24
United States Bureau of Mines Reports
13
30 Minute Series
12
Farmers' bulletin (United States. Department of Agriculture)
11
National reporter system. United States series
8
The Federal Reporter
8
15 Minute Series (Topographic)
5
22 More
Degree Department
States
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Lift Theory of Supporting Surfaces: Second Article
Memorandum presenting a description of the hydrodynamic lift theory of supporting services. This report is mainly about the task of finding suitable wing sections for given lift conditions. Formulas are given for lift magnitude and moment, which make it possible to obtain solutions of great simplicity and clearness.
Date:
September 1921
Creator:
von Mises, R.
Object Type:
Report
System:
The UNT Digital Library
Some New Tests at the Gottingen Laboratory
The tests at the Gottingen laboratory included: friction tests on a surface treated with emaillite, verification tests on the M.V.A. 356 wing, and comparative tests of wing no. 36 at the Eiffel laboratory. The examination of all these experiments leads to the belief that, at large incidences, the speeds registered by the suction manometer of the testing chamber of the Eiffel laboratory wind tunnel are, owing to pressure drop, greater than the actual speeds. Therefore, the values of k(sub x) and k(sub y) measured at the Eiffel laboratory at large incidences are too low.
Date:
April 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Distant-Compass
Report presenting a description of fluid compasses that are being used in aircraft, including why magnetic compasses are not usable. Details of the distant compass are provided, which is an improved form of the compass that has a practical application in seaplanes.
Date:
June 1921
Creator:
Friedensburg, Walter & Miner, D. M.
Object Type:
Report
System:
The UNT Digital Library
Destructive Distillation of Mixtures of Oil and Coal
Report issued by the U.S. Bureau of Mines on the characteristics and behavior of oil and coal distillation processes. The effectiveness of the distillation processes and the properties of the oil and coal mixtures are presented. This report includes tables, graphs, and illustrations.
Date:
December 1921
Creator:
Davis, Joseph D.; Place, Palmer B. & Scott, G. S.
Object Type:
Report
System:
The UNT Digital Library
Motor trucks on eastern farms.
Describes the use of motor trucks on farms in the eastern United States and evaluates costs and benefits.
Date:
July 1921
Creator:
Tolley, H. R. (Howard Ross), 1889-1958 & Church, L. M. (Lillian M.), 1872-1939
Object Type:
Book
System:
The UNT Digital Library
Protection of mesquite cordwood and posts from borers.
Describes the value of the mesquite tree, and the threat of the borer to it. Also describes the life cycle of the borer.
Date:
May 1921
Creator:
Craighead, Frank C. (Frank Cooper), 1890-
Object Type:
Book
System:
The UNT Digital Library
Plans of rural community buildings.
Describes the plans and procedures for constructing rural community buildings, and their uses.
Date:
January 1921
Creator:
Nason, W. C. (Wayne Crocker), b. 1874 & Galpin, Charles Josiah, b. 1864
Object Type:
Book
System:
The UNT Digital Library
Chimneys and fireplaces : they contribute to the health, comfort and happiness of the farm family : how to build them.
A concise explanation of the principles to be observed when building chimneys and fireplaces.
Date:
December 1921
Creator:
Daniels, Ara Marcus, b. 1884
Object Type:
Book
System:
The UNT Digital Library
Map of Europe in 1921.
Map of Europe. Extended text in upper left corner.
Date:
1921
Creator:
Kurth, Otto.
Object Type:
Map
System:
The UNT Digital Library
Soil Survey of Bowie County, Texas
Text includes description of climate, agriculture, and soils.
Date:
1921
Creator:
Schoenmann, L. R. (Lee Roy Adolph), b. 1889
Object Type:
Book
System:
The Portal to Texas History
Automobile.
Patent for an automobile with a mechanism which may be extended to form a tent bed, or folded into a small compass. The folding bed of the automobile may be utilized to storm camp equipment when not used as a bed.
Date:
January 4, 1921
Creator:
Mackey, Franklin Orville
Object Type:
Patent
System:
The Portal to Texas History
Cotton Blocker
Patent for cotton blockers that prevent crops from becoming covered in soil during the harvesting process.
Date:
February 15, 1921
Creator:
Fowler, Alonzo. J.
Object Type:
Patent
System:
The Portal to Texas History
Current-Motor.
Patent for a current motor in which water wheels are employed to drive electric generators. The design provides for pontoons to allow the water wheels to be adjustably supported. Constructed in sections, additional sections can easily be added and bracing is included so that the units can be configured to rise and fall together.
Date:
February 15, 1921
Creator:
Rebman, Johan J.
Object Type:
Patent
System:
The Portal to Texas History
Automobile-Signal.
Patent for turn signal improvements with an aim to improve visibility of signal and ease of replacement with the goal of communicating vehicular movement and reducing accidents.
Date:
November 15, 1921
Creator:
Squier, William Ernest
Object Type:
Patent
System:
The Portal to Texas History
Chuck.
Patent for chucks that secure pipes, preventing movement when being cut or threaded, including illustrations.
Date:
December 27, 1921
Creator:
Castanie, William
Object Type:
Patent
System:
The Portal to Texas History
Adjustable End Die.
Patent for improvements to adjustable end dies. These improvements allow convenient rethreading of bolts while it is engaged with an object.
Date:
February 8, 1921
Creator:
Wright, John G.
Object Type:
Patent
System:
The Portal to Texas History
Coupling.
Patent for improvements to couplings for windmills specifically "for use in connecting the pump rod to the reciprocal rod of the windmill, so as to permit reciprocation of the wind mill rod independently of movement of the pump rod, and which also will permit the relatively quick and easy change from windmill power to engine power, such as gasolene engine or the like, for pumping water from wells" (lines 9-17) including instructions and illustrations.
Date:
March 29, 1921
Creator:
Regenier, John G.
Object Type:
Patent
System:
The Portal to Texas History
Boll Weevil Catcher
The objective of the invention is to improve to catching and destroying boll weevils with a device that is easily attached to a cultivator. This device includes "receptacles filled with an insect destroying liquid." (lines 23-24).
Date:
July 5, 1921
Creator:
Ploch, Alex
Object Type:
Patent
System:
The Portal to Texas History
Cereal Food and Process of Preparing the Same.
Patent for improving cereal food processing by grinding corn and other grains into meal to convert starch into dextrin, and through drying grains to remove moisture and prevent fermentation (lines 17-23). Additionally, the processing will make the cereal appetizing and easily digestible.
Date:
November 1, 1921
Creator:
Kelly, Martha R.
Object Type:
Patent
System:
The Portal to Texas History
Analytical methods for computing the polar curves of airplanes
This report presents a method of calculating polar curves which is at least as precise as graphical methods, but it more rapid. Knowing the wind tunnel test of a wing and the performances of an airplane of the same profile, it is easy to verify the characteristic coefficients and, at the same time, the methods determining induced resistances.
Date:
March 1921
Creator:
Le Sueur
Object Type:
Report
System:
The UNT Digital Library
The Drawing of Experimental Curves
This report presents a discussion of how to determine the location of a line or surface from experimental data. What we desire to know practically is the number of ordinates required to obtain a certain probable precision in drawing a line or surface.
Date:
July 1921
Creator:
Norton, F. H.
Object Type:
Report
System:
The UNT Digital Library
On the Definition of the Standard Atmosphere
"On April 15, 1920, the under Secretary of State for Aeronautics and Aerial Transport decided to adopt as Standard Atmosphere for official airplane tests in France, the atmosphere defined by the following law, known as the Law of the S.T.You.(Technical Section of Aeronautics): From 0 to 11,000 m. - 0=15-0.0065 Z and above 11,000 m. - 0= -56.5 degrees being the temperature in centigrade degrees at altitude Z expressed in meters. For altitude 0 the pressure is 760 mm of mercury. In the magazine "L'Aeronautique" Mr. A. Toussaint has already written at length on the first studies which led to the elaboration of this law. Since that time the results obtained have been confirmed by fuller and more abundant data which have justified the official adoption of the Law of the S.T.Ae" (p. 1).
Date:
April 1921
Creator:
Grimault, P.
Object Type:
Report
System:
The UNT Digital Library
Tin Soldering of Aluminum and Its Alloys
A method is presented for soldering aluminum to other metals. The method adopted consists of a galvanic application to the surface of the light-metal parts to be soldered, of a layer of another metal, which, without reacting electrolytically on the aluminum, adheres strongly to the surface to which it is applied, and is, on the other hand, adapted to receive the soft solder. The metal found to meet the criteria best was iron.
Date:
October 1921
Creator:
Gallo, Gino
Object Type:
Report
System:
The UNT Digital Library
Experiment Station Record, Volume 44, January-June, 1921
Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, bibliographies and listings for Spanish edition publications from the Porto Rico Station. Name and subject indexes start on page 901.
Date:
1921
Creator:
United States. Office of Experiment Stations.
Object Type:
Book
System:
The UNT Digital Library