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Airplane Superchargers
Discussed here are the principles and operation of aircraft engine superchargers used to maintain and increase engine power as aircraft encounter decreases in the density of air as altitude rises. Details are given on the design and operation of the centrifugal compressors. A method is given for calculating the amount of power needed to drive a compressor. The effects of the use of a compressor on fuel system operation and design are discussed. Several specific superchargers that were in operation are described.
Date:
May 1921
Creator:
Noack, W. G.
Object Type:
Report
System:
The UNT Digital Library
British Certificates of Airworthiness
This report details the rules and regulations for obtaining a British airworthiness certificate. Aircraft loading and construction are especially important.
Date:
May 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
On a New Type of Wind Tunnel
Discussed here is a new type of wind tunnel, its advantages, the difficulties attendant upon its use, and the special methods required for its operation. The main difference between the new type of wind tunnel and the ones now in operation is the use of a different fluid. The idea is to diminish the effect of viscosity.
Date:
May 1921
Creator:
Munk, Max
Object Type:
Report
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
Rice as food.
Describes the international importance of rice; provides various dishes, recipes, tips, and cooking methods, all revolving around rice as a main foodstuff.
Date:
May 1921
Creator:
United States. Department of Agriculture. Office of Home Economics.
Object Type:
Book
System:
The UNT Digital Library
Animal Trap.
Patent for Animal Trap especially adapted for the extermination of mice and similar rodents.
Date:
1920-09-5
Creator:
Fredrick, Willaim.
Object Type:
Patent
System:
The Portal to Texas History
Fuse Block
Patent for improvements to Patent No. 1113528. Invention provides a fuse block where the fuses can be replaced by a lineman without being in close proximity to the primary circuit wires. Invention also allows various types of fuses to be used.
Date:
May 3, 1921
Creator:
Anderson, Lou Belle
Object Type:
Patent
System:
The Portal to Texas History
Insecticide-Holder.
Patent for an insecticide holder having improved and "novel means for discharging the insecticide" (lines 10-11).
Date:
May 3, 1921
Creator:
Irwin, Herbert G.
Object Type:
Patent
System:
The Portal to Texas History
Lock for Automobiles
Patent for a new inexpensive, secure, and convenient to use lock for automobiles to be secured against theft, or use, while the lock is attached.
Date:
May 3, 1921
Creator:
Godbey, Walter H., Jr.
Object Type:
Patent
System:
The Portal to Texas History
Locking Device for Motor-Vehicles.
Patent for motor vehicle locking device to prevent theft or unauthorized use of motor vehicle. Suited for motor vehicles with the "throttle and spark levers below the steering wheel" (lines 18-19).
Date:
May 3, 1921
Creator:
Harris, Robert E.
Object Type:
Patent
System:
The Portal to Texas History
Removable Pass-Book.
Patent for a book with a removable cover that lies flat when open and fits within a pocket. Particularly suited for bank books, also known as passbooks.
Date:
May 3, 1921
Creator:
Exline, Marcus P.
Object Type:
Patent
System:
The Portal to Texas History
Rolling Fender
Patent for improvements in rolling fenders. The invention can be attached to an earth working device, such as a cultivator, to prevent clods of dirt being thrown and crushing small plants. Multiple discs will crush the clods and prevent the dirt from sticking to the rolling fender.
Date:
May 3, 1921
Creator:
Wright, Joseph Hansel
Object Type:
Patent
System:
The Portal to Texas History
Self-Closing Bundle-Receptacle.
Patent for a receptacle basket that attaches to the side of an automobile and closes automatically using springs and hinges.
Date:
May 3, 1921
Creator:
Cardwell, Charles E.
Object Type:
Patent
System:
The Portal to Texas History
Adjustable Flat Die.
Patent for improved adjustable flat dies which provide different sizes of cutting dies to the cutting device.
Date:
May 10, 1921
Creator:
Wright, John G.
Object Type:
Patent
System:
The Portal to Texas History
Air-Storage-Tank Liquid-Dispensing Device.
Patent for an air storage tank liquid dispending device which is convenient and economically better to pull liquid from wells, buried tanks, etc.
Date:
May 10, 1921
Creator:
Posa, Emit M.
Object Type:
Patent
System:
The Portal to Texas History
Book-Support and Writing-Table.
Patent for book support and writing table that adjusts to the item being used by the person. The tray is able to hold the item either a book or writing materials while adjusting to the user's needs. The book support and writing table can be folded to occupy little space.
Date:
May 10, 1921
Creator:
Taylor, Henry S.
Object Type:
Patent
System:
The Portal to Texas History
Can Opener
Patent for a can opener specifically shoe polish boxes. It is used as an opener that will not require the use of rivets, openings in the material, or any other means whereby air may enter the can.
Date:
May 10, 1921
Creator:
Searcy, Peter B.
Object Type:
Patent
System:
The Portal to Texas History
Clutch and Transmission Mechanism
Patent for a new and useful improvements in a clutch and transmission mechanism specially applicable to motor vehicles. It has been designed for the purpose of operating the clutch and transmission for effecting changes of speed in which the speed desired can be selected in advance and then obtained by an automatic shifting of the transmission gears, when the clutch is disengaged through the operation of the clutch controlling lever.
Date:
May 10, 1921
Creator:
Mottier, Walter F.
Object Type:
Patent
System:
The Portal to Texas History
Compressed-Air-Feed Liquid-Container.
Patent for compressed air feed liquid container uses compressed air to move the liquid through tubes and out the pipe.
Date:
May 10, 1921
Creator:
Posa, Emit M.
Object Type:
Patent
System:
The Portal to Texas History
Cultivator-Fender.
Patent for an improvement to cultivator-fenders that prevents rocks and other debris from being throws about while plowing.
Date:
May 10, 1921
Creator:
Calk, Alonzo E.
Object Type:
Patent
System:
The Portal to Texas History
Flour-Milling Machinery.
Patent for flour milling machinery with reduced costs of equipment and operation, less required space, and improved quality and quantity of flour.
Date:
May 10, 1921
Creator:
Smith, George T.
Object Type:
Patent
System:
The Portal to Texas History
Ink-Bottle
Patent for an ink bottle with screw threads allowing it to be screwed and unscrewed into a holder or desk; ink bottle can also be removed for cleaning or filling.
Date:
May 10, 1921
Creator:
Kayser, Mary Louise
Object Type:
Patent
System:
The Portal to Texas History
Lifting-Jack
Patent for an improvement made to lifting jack machinery that raises automobiles for repairs. The patent prevents the axle from slipping in circumstances where the vehicle is on slippery grounds or parked on a hill. Includes illustrations.
Date:
May 10, 1921
Creator:
Watson, Chester A.
Object Type:
Patent
System:
The Portal to Texas History
Oil-Stove
Patent for improvements in oil burner stoves.Pertains more to oil stoves with movable burners so that the flame intensity can be adjusted or extinguished.
Date:
May 10, 1921
Creator:
Cook, Thomas Edward
Object Type:
Patent
System:
The Portal to Texas History