Core-Taking Device (open access)

Core-Taking Device

Patent for improvements to a core-taking device which will "form a core, in the process of drilling, and embodies means for severing the core, when formed, and retaining the same in the core barrel until, it is withdrawn for inspection" (lines 13-17), including illustrations.
Date: June 20, 1922
Creator: Christian, Walton G.
Object Type: Patent
System: The Portal to Texas History
Combined Adding and Listing Machine. (open access)

Combined Adding and Listing Machine.

Patent for new improvements on combined adding and listing machines simplifying and economizing construction and facilitating, "rapidity of operation" (lines14-15). Improvements include: "causing the keys to act directly as stops for the adding wheel section; to provide novel accumulator mechanism...[with] a novel actuator; to provide a novel construction or sector-control bar; to provide a novel key-bar for operating...; to provide novel means for restoring the accumulator to normal; to provide stop mechanism to permit the carryovers of the accumulator...;to provide novel means for restoring the sectors to normal; to provide improved means for holding the accumulator in operative or inoperative position...; to provide novel means for connecting the accumulator sectors with the type sectors; 5o provide novel means for connecting the accumulator sectors with the type sectors; to provide novel means for actuating the hammer and paper feed mechanism; to provide improved general-error key mechanism; to provide an improved construction and operation of key-bar and sector-control bar; to permit of the operation of elimination" (lines 15-46).
Date: April 20, 1920
Creator: McCaleb, Walter F.
Object Type: Patent
System: The Portal to Texas History
A Biological Survey of the Pribilof, Alaska (open access)

A Biological Survey of the Pribilof, Alaska

Brief summary of the geographic distribution, habits, and habitats of the birds, mammals, insects, arachnids, and chilopods of the Pribilof Islands.
Date: June 20, 1923
Creator: Preble, Edward A. & McAtee, W. L.
Object Type: Report
System: The UNT Digital Library
The Effect of Reduction Gearing on Propeller-Body Interference as Shown by Full-Scale Wind-Tunnel Tests (open access)

The Effect of Reduction Gearing on Propeller-Body Interference as Shown by Full-Scale Wind-Tunnel Tests

This report presents the results of full-scale tests made on a 10-foot 5-inch propeller on a geared J-5 engine and also on a similar 8-foot 11-inch propeller on a direct-drive J-5 engine. Each propeller was tested at two different pitch settings, and with a large and a small fuselage. The investigation was made in such a manner that the propeller-body interference factors were isolated, and it was found that, considering this interference only, the geared propellers had an appreciable advantage in propulsive efficiency, partially due to the larger diameter of the propellers with respect to the bodies, and partially because the geared propellers were located farther ahead of the engines and bodies.
Date: March 20, 1929
Creator: Weick, Fred E.
Object Type: Report
System: The UNT Digital Library
Effect of turbulence in wind-tunnel measurements (open access)

Effect of turbulence in wind-tunnel measurements

This paper gives some quantitative measurements of wind tunnel turbulence and its effect on the air resistance of spheres and airship models, measurements made possible by the hot wire anemometer and associated apparatus in its original form was described in Technical Report no. 320 and some modifications are presented in an appendix to the present paper. One important result of the investigation is a curve by means of which measurements of the air resistance of spheres can be interpreted to give the turbulence quantitatively. Another is the definite proof that the discrepancies in the results on the N. P. L. Standard airship models are due mainly to differences in the turbulences of the wind tunnels in which the tests were made.
Date: August 20, 1929
Creator: Dryden, H. L. & Kuethe, A. M.
Object Type: Report
System: The UNT Digital Library
Drag of Wings With End Plates (open access)

Drag of Wings With End Plates

"In this report a formula for calculating the induced drag of multiplanes with end plates is derived. The frictional drag of the end plates are used, is sufficiently large to increase the efficiency of the wing. Curves showing the reduction of drag for monoplanes and biplanes are constructed; the influence of gap-chord ratio, aspect ratio, and height of end plate are determined for typical cases. The method of obtaining the reduction of drag for a multiplane is described" (p. 253).
Date: January 20, 1927
Creator: Hemke, Paul E.
Object Type: Report
System: The UNT Digital Library
Air Force Tests of Sperry Messenger Model With Six Sets of Wings (open access)

Air Force Tests of Sperry Messenger Model With Six Sets of Wings

From Summary: "The purpose of this test was to compare six well-known airfoils, the R.A.F 15, U.S.A. 5, U.S.A. 27, U.S.A. 35-B, Clark Y, and Gottingen 387, fitted to the Sperry Messenger model, at full scale Reynolds number as obtained in the variable density wind tunnel of the National Advisory Committee for Aeronautics; and to determine the scale effect on the model equipped with all the details of the actual airplane. The results show a large decrease in minimum drag coefficient upon increasing the Reynolds number from about one-twentieth scale to full scale. A comparison is made between the results of these tests and those obtained from tests made in this tunnel on airfoils alone."
Date: January 20, 1927
Creator: Shoemaker, James M.
Object Type: Report
System: The UNT Digital Library
Full Scale Tests on a Thin Metal Propeller at Various Tip Speeds (open access)

Full Scale Tests on a Thin Metal Propeller at Various Tip Speeds

"This report describes an investigation made in order to determine the effect of tip speed on the characteristics of a thin-bladed metal propeller. The propeller was mounted on a VE-7 airplane with a 180-HP E-2 engine, and tested in the 20-foot propeller research tunnel of the National Advisory Committee for Aeronautics. It was found that the effect of tip speed on the propulsive efficiency was negligible within the range of the tests, which was from 600 to 1,000 feet per second (about 0.5 to 0.9 the velocity of sound in air)" (p. 465).
Date: June 20, 1928
Creator: Weick, Fred E.
Object Type: Report
System: The UNT Digital Library
Adjustable Footrest. (open access)

Adjustable Footrest.

Patent for an improved, adjustable foot rest that allows for more adjustments and range of motion "to any desired position for the comfort of the user" (lines 13-14), and is secured to the floor.
Date: April 20, 1920
Creator: Kingsford, Walter E.
Object Type: Patent
System: The Portal to Texas History
Book-Holding Device (open access)

Book-Holding Device

Patent for a book-holding device that will keep books open by holding back turned pages, with illustrations.
Date: April 20, 1920
Creator: Barry, David Redmond
Object Type: Patent
System: The Portal to Texas History
Antifreezing Appliance for Water-Pipes. (open access)

Antifreezing Appliance for Water-Pipes.

Patent for anti-freezing appliance for water supply and drain pipes of residences and buildings. The object is provide a device connected with the main and service lines of a hours supply water system for the purpose of avoiding interfering with the operation of the service.
Date: January 20, 1920
Creator: Davis, Thomas A.
Object Type: Patent
System: The Portal to Texas History
Combination-Flue. (open access)

Combination-Flue.

Patent for the improvement of combination flue to be more inexpensive and for the parts to be more readily assembled and properly supported.
Date: January 20, 1920
Creator: Carl, Reinhold Adolph
Object Type: Patent
System: The Portal to Texas History
Automobile-Windlass (open access)

Automobile-Windlass

Patent for improved windlass for an automobile that attaches to both rear wheels to prevent idling
Date: April 20, 1920
Creator: Davis, Marion A.
Object Type: Patent
System: The Portal to Texas History
Automatic Signal-Actuating Mechanism for Railways (open access)

Automatic Signal-Actuating Mechanism for Railways

Patent for an improved signal actuating mechanisms for railways. When the train cars reach an operating mechanism, a flag will be raised where pedestrians or cars cross, and cause a signal to be repeated until the train passes.
Date: July 20, 1920
Creator: Bashara, Samuel Farris
Object Type: Patent
System: The Portal to Texas History
Attachment for Rotaries. (open access)

Attachment for Rotaries.

Patent for rotary well-drilling machinery where the "ring or bushing to rotate independently of the table and the present invention is directed to means for accomplishing the rotating effect." (line 24-27)
Date: July 20, 1920
Creator: Johnston, Horace G.
Object Type: Patent
System: The Portal to Texas History
Automatic Trough-Valve. (open access)

Automatic Trough-Valve.

Patent for improvements in animal watering troughs that has an automatic float control valve in connection with the trough.
Date: July 20, 1920
Creator: Striegler, Fritz
Object Type: Patent
System: The Portal to Texas History
Salad Dressing (open access)

Salad Dressing

Patent for improving salad dressing. This salad dressing has high quality ingredients to go with any salad.
Date: November 20, 1923
Creator: Scholl, William H. & Scholl, Barney
Object Type: Patent
System: The Portal to Texas History
Liquid Fuel Burner (open access)

Liquid Fuel Burner

Patent for fuel burner that can be dismantled and easily moved around the kitchen.
Date: June 20, 1920
Creator: Tucker, William A.
Object Type: Patent
System: The Portal to Texas History
Window-Screen. (open access)

Window-Screen.

Patent for improvements in screen constructions in connection with doors or windows. The goal is to provide a means for encouraging insects that are on the inner surfaces of the screen.
Date: January 20, 1920
Creator: McGeorge, Jefferson F.
Object Type: Patent
System: The Portal to Texas History
Price-Tag. (open access)

Price-Tag.

Patent for an improved price tag that includes not only the price information, but also "at a glance a stock record and a cost record and provides space for making notations and writing other information" (lines 13-16) for the use of a store clerk's reference.
Date: April 20, 1920
Creator: Bedinger, Singleton B.
Object Type: Patent
System: The Portal to Texas History
Spear (open access)

Spear

Patent for a spear that is used to help withdraw or remove pipes that may get stuck in wellbores.
Date: April 20, 1920
Creator: Gray, Ellsworth
Object Type: Patent
System: The Portal to Texas History
Pump (open access)

Pump

Patent for an improvement to pumps. This pump is designed to facilitate pumping of materials from deep oil and water wells.
Date: March 20, 1920
Creator: Hunt, David
Object Type: Patent
System: The Portal to Texas History
Mail-Transferring Apparatus. (open access)

Mail-Transferring Apparatus.

Patent for a mail transferring apparatus designed to transfer mail bags from a station to a moving mail car with minimal injury to the mail bag or the receiving employees.
Date: April 20, 1920
Creator: Bashell, Edward Allen & Smart, W. L.
Object Type: Patent
System: The Portal to Texas History
Man's Garment (open access)

Man's Garment

Patent for improvements in men's garments allowing for a reversible garment wherein the stitches appear the same regardless of which side is out.
Date: April 20, 1920
Creator: Góngora, Tomás
Object Type: Patent
System: The Portal to Texas History