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Plasma channel optical-pumping device and method
A device and method are described for optically pumping a gaseous laser using blackbody radiation produced by a plasma channel which is formed from an electrical discharge between two electrodes spaced at opposite longitudinal ends of the laser. A preionization device which can comprise a laser or electron beam accelerator produces a preionization beam which is sufficient to cause an elctrical discharge between the electrodes to initiate the plasma channel along the preionization path. The optical pumping energy is supplied by a high voltage power supply rather than by the preionization beam. High output optical intensities are produced by the laser due to the high temperature black-body radiation produced by the plasma channel, in the same manner as an exploding wire type laser. However, unlike the exploding wire type laser, the disclosed invention can be operated in a repetitive manner by utilizing a repetitive pulsed preionization device.
Date:
July 17, 1981
Creator:
Judd, O.P.
System:
The UNT Digital Library
Control system for a wound-rotor motor
A load switching circuit for switching two or more transformer taps under load carrying conditions includes first and second parallel connected bridge rectifier circuits which control the selective connection of a direct current load to taps of a transformer. The first bridge circuit is normally conducting so that the load is connected to a first tap through the first bridge circuit. To transfer the load to the second tap, a switch is operable to connect the second bridge circuit to a second tap, and when the second bridge circuit begins to conduct, the first bridge circuit ceases conduction because the potential at the second tap is higher than the potential at the first tap, and the load is thus connected to the second tap through the second bridge circuit. The load switching circuit is applicable in a motor speed controller for a wound-rotor motor for effecting tap switching as a function of motor speed while providing a stepless motor speed control characteristics.
Date:
July 17, 1981
Creator:
Ellis, James N.
System:
The UNT Digital Library
Continuous chain bit with downhole cycling capability
A continuous chain bit for hard rock drilling is disclosed which is capable of downhole cycling. A drill head assembly moves axially relative to a support body while the chain on the head assembly is held in position so that the bodily movement of the chain cycles the chain to present new composite links for drilling. A pair of spring fingers on opposite sides of the chain hold the chain against movement. The chain is held in tension by a spring-biased tensioning bar. A head at the working end of the chain supports the working links. The chain is centered by a reversing pawl and piston actuated by the pressure of the drilling mud. Detent pins lock the head assembly with respect to the support body and are also operated by the drilling mud pressure. A restricted nozzle with a divergent outlet sprays drilling mud into the cavity to remove debris. Indication of the centered position of the chain is provided by noting a low pressure reading indicating proper alignment of drilling mud slots on the links with the corresponding feed branches.
Date:
March 17, 1981
Creator:
Ritter, D. F.; St. Clair, J. A. & Togami, H. K.
System:
The UNT Digital Library
Coal gasification vessel. [Patent application]
A vessel system comprises an outer shell of carbon fibers held in a binder, a coolant circulation mechanism and control mechanism and an inner shell comprised of a refractory material and is of light weight and capable of withstanding the extreme temperature and pressure environment of, for example, a coal gasification process. The control mechanism can be computer controlled and can be used to monitor and modulate the coolant which is provided through the circulation mechanism for cooling and protecting the carbon fiber and outer shell. The control mechanism is also used to locate any isolated hot spots which may occur through the local disintegration of the inner refractory shell.
Date:
March 17, 1981
Creator:
Loo, Billy W.
System:
The UNT Digital Library
Baling-Press
Patent for "improvements in baling presses: and it consists in a press having a suitable frame, a box mounted thereon having a hinged front and a hinged side." (lines 11-14) including instructions and illustrations.
Date:
July 17, 1900
Creator:
Stopple, John J.
System:
The Portal to Texas History
Baling-Press
Patent for a baling press that uses the minimum amount of power to accomplish the baling process.
Date:
January 17, 1911
Creator:
Gill, Fleet & Graham, Daniel O.
System:
The Portal to Texas History
Ball-Bearing.
Patent for a new and useful ball bearing, including instructions and illustrations.
Date:
October 17, 1899
Creator:
Millen, George
System:
The Portal to Texas History
Clothes Pounder
Patent for a clothes pounder. Illustration included.
Date:
May 17, 1910
Creator:
Turner, James S. & Campbell, John Luther
System:
The Portal to Texas History
Apparatus for Molding Pipe
Patent for device that allows multiple sized pipes or pipe sections to be milded.
Date:
March 17, 1903
Creator:
Bergstrom, Otto
System:
The Portal to Texas History
Cotton Chopper
Patent for a cotton chopper. Illustrations included.
Date:
October 17, 1905
Creator:
Coldiron, George Gipson
System:
The Portal to Texas History
Cotton-Compress
Patent for a cotton compress. Illustrations included.
Date:
September 17, 1912
Creator:
Mode, Marshall M.
System:
The Portal to Texas History
Apparatus for Transmitting Sound-Waves
Patent for transmitting sound waves by magnetic induction and to "furnish an apparatus by which these different vibrations can be heard at the receiving end" (lines 20-22). Includes descriptions and illustrations.
Date:
October 17, 1911
Creator:
Harvey, Fred Brown
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.
System:
The Portal to Texas History
Car Coupling
Patent for train car coupling. Illustration included.
Date:
January 17, 1905
Creator:
Jones, Evan S.
System:
The Portal to Texas History
Cotton and Corn Scraper.
Patent for a new and useful cotton and corn scraper.
Date:
May 17, 1898
Creator:
Dove, Thoms F.
System:
The Portal to Texas History
Gage for Plows.
Patent for a new type of gage for a running plow, that can be adjusted for a specific depth
Date:
December 17, 1901
Creator:
Wilson, William H.
System:
The Portal to Texas History
Condenser for Cotton-Gins.
Patent for a new means of separating air from cotton, expelling the air while the cotton is condensed and released for baling.
Date:
September 17, 1901
Creator:
Murray, Stephen D.
System:
The Portal to Texas History
Bicycle-Support.
Patent for a bicycle support which holds "bicycles in upright position when not in use" (lines 8-9).
Date:
April 17, 1900
Creator:
Taylor, James P.
System:
The Portal to Texas History
Baling-Press
Patent for a baling press, designed so that the feeding and baling of cotton or straw is performed automatically, Illustrations included.
Date:
December 17, 1907
Creator:
Cumpston, Frederick B.
System:
The Portal to Texas History
Bed or Douche Pan.
Patent for improvements in bed or douche pans, in which it will not spill easily and is easy to clean. Illustration is included.
Date:
August 17, 1909
Creator:
Williams, Bettie C. & Scott, Arthur C.
System:
The Portal to Texas History
Combined Stalk Cutter and Harrow
Patent for a new stalk cutter
Date:
October 17, 1911
Creator:
Harris, Harvey P.
System:
The Portal to Texas History
Collapsible Receptacle for Vehicles.
Patent for an invention to improve collapsible receptacles for use in vehicles, more specifically wagons. Item is designed to be used on the spring seats of wagons for the purpose of storing items under the seat of wagons. Includes specifications and illustrations.
Date:
April 17, 1900
Creator:
Williams, Anderson D. & Walsh, Charles D.
System:
The Portal to Texas History
Bicycle
Patent for a bicycle propelled by the front wheel. Illustrations included.
Date:
May 17, 1910
Creator:
Franklin, Robert M.
System:
The Portal to Texas History
Automatic Railroad-Switch
Patent for an automatic railroad switch which throws the switch automatically back to the main line after a train has entered a siding.
Date:
August 17, 1909
Creator:
Toullerton, George Edward
System:
The Portal to Texas History