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Method of boronizing transition-metal surfaces
A method is presented for preparing a boride layer on a transition metal substrate for use in corrosive environments or as a harden surface in machine applications. This method is particularly useful in treating current collectors for use within a high temperature and corrosive electrochemical cell environment. A melt of a alkali metal boride tetrafluoride salt including such as KF to lower its melting point is prepared including a dissolved boron containing material, for instance NiB, MnB/sub 2/, or CrB/sub 2/. A transition metal to be coated is immersed in the melt at a temperature of no more than 700/sup 0/C and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface.
Date:
August 28, 1981
Creator:
Koyama, K. & Shimotake, H.
System:
The UNT Digital Library
Oil-shale-retorting and combustion system. [DOE patent application]
The present invention is directed to the extraction of energy values from oil shale containing considerable concentrations of calcium carbonate in an efficient manner. The volatiles are separated from the oil shale in a retorting zone of a fluidized bed where the temperature and the concentration of oxygen are maintained at sufficiently low levels so that the volatiles are extracted from the oil shale with minimal combustion of the volatiles and with minimal calcination of the calcium carbonate. These gaseous volatiles and the calcium carbonate flow from the retorting zone into a freeboard combustion zone where the volatiles are burned in the presence of excess air. In this zone the calcination of the calcium carbonate occurs but at the expense of less Btu's than would be required by the calcination reaction in the event both the retorting and combustion steps took place simultaneously. The heat values in the products of combustion are satisfactorily recovered in a suitable heat exchange system.
Date:
August 28, 1981
Creator:
Pitrolo, Augustine A.; Mei, Joseph S. & Shang, Jerry Y.
System:
The UNT Digital Library
Nuclear reactor control apparatus
Nuclear reactor core safety rod release apparatus comprises a control rod having a detent notch in the form of an annular peripheral recess at its upper end, a control rod support tube for raising and lowering the control rod under normal conditions, latches pivotally mounted on the control support tube with free ends thereof normally disposed in the recess in the control rod, and cam means for pivoting the latches out of the recess in the control rod when a scram condition occurs. One embodiment of the invention comprises an additonal magnetically-operated latch for releasing the control rod under two different conditions, one involving seismic shock.
Date:
August 28, 1981
Creator:
Sridhar, B.N.
System:
The UNT Digital Library
Method and apparatus for producing cryogenic targets
An improved method and apparatus are given for producing cryogenic inertially driven fusion targets in the fast isothermal freezing (FIF) method. Improved coupling efficiency and greater availability of volume near the target for diagnostic purposes and for fusion driver beam propagation result. Other embodiments include a new electrical switch and a new explosive detonator, all embodiments making use of a purposeful heating by means of optical fibers.
Date:
August 28, 1981
Creator:
Murphy, James T. & Miller, John R.
System:
The UNT Digital Library
Closer for Cans and the Like.
Patent for an efficient, easy-open-and-close top for various types of cans which are used frequently.
Date:
May 28, 1912
Creator:
Perkins, William Hunter
System:
The Portal to Texas History
Combined Closer And Latch For Gates, &c
Patent for combined closer and latch for gates. Illustration included.
Date:
February 28, 1905
Creator:
McKinney, Pleasant M.
System:
The Portal to Texas History
Churn
Patent for a churn. This invention is a class of rotary dasher churns using two paddles. Illustration included.
Date:
June 28, 1904
Creator:
Roberts, Chandler Y.
System:
The Portal to Texas History
Check-Valve
Patent for a valve used for well drilling designed to be confine fluid around the pipe. Illustrations included.
Date:
September 28, 1909
Creator:
Kreiter, Richard F.
System:
The Portal to Texas History
Cotton-Chopper.
Patent for a cotton chopper, which can operate in uneven soil and attaches to a cultivator.
Date:
July 28, 1908
Creator:
Allen, John W.
System:
The Portal to Texas History
Churn.
Patent for an automatic butter churn with illustrations.
Date:
January 28, 1902
Creator:
Fitzhugh, James, S.
System:
The Portal to Texas History
Artificial Stone.
Patent for a process of manufacturing artificial stone in which “it will not cracked by reason of exposure and which may be readily engraved, impressed or otherwise marked to form letters, characters, emblems and etc….” (Lines 16-20). No illustration.
Date:
August 28, 1900
Creator:
Johnson, Jesse W. & Hendrix, Albert S.
System:
The Portal to Texas History
Cotton Chopper
Patent for a cotton chopper. This invention is designed to be adjustable horizontally to operate on crooked rows. Illustrations included.
Date:
March 28, 1911
Creator:
Burton, George W.; Warwick, Vesper V. & Patton, Deacon O.
System:
The Portal to Texas History
Churn
Patent for a churn. This invention consists of a vertically disposed rotatable dasher. Illustration included.
Date:
June 28, 1904
Creator:
Lavender, Samuel C.; Chennault, Steven A. & Chennault, Thomas H.
System:
The Portal to Texas History
Bat-Former
Patent for a cotton bat former for use in cotton gins.
Date:
March 28, 1911
Creator:
Ball, Samuel M.
System:
The Portal to Texas History
Coop
Patent for a coop. Illustration included.,
Date:
December 28, 1909
Creator:
Mann, John P.
System:
The Portal to Texas History
Crude Oil Burner
Patent for a crude oil burner. Illustration included.
Date:
December 28, 1909
Creator:
Payne, William H. & Rice, Newton M.
System:
The Portal to Texas History
Cement Kiln
Patent for a new and improved cement kiln for drying gypsum and other materials employed in the manufacture of cement and plaster.
Date:
April 28, 1902
Creator:
Malone, Samuel R.
System:
The Portal to Texas History
Animal-Trap.
Patent for an improved self-setting trap that can capture and kill animals while preventing them from reaching the bait.
Date:
August 28, 1906
Creator:
Sheridan, William H.
System:
The Portal to Texas History
Bale Band Fastening
Patent for a bale band fastening. Illustration included.
Date:
February 28, 1905
Creator:
Campbell, Douglas M.
System:
The Portal to Texas History
Churn.
Patent for a churn with vertically reciprocating dashers.
Date:
June 28, 1910
Creator:
Decker, William A.
System:
The Portal to Texas History
Attachment for Lifting-Jacks
Patent for an attachment for lifting jacks.
Date:
March 28, 1911
Creator:
Porter, Horton B.
System:
The Portal to Texas History
Automatic Regulator for Pneumatic Flues
Patent for a regulated valve to automatically maintain air pressure in a pneumatic conveyor flue. Excessive air pressure causes a secondary valve to open and vent the pressure while at the same time impeding air flow downstream.
Date:
May 28, 1901
Creator:
Caffey, Charles B.
System:
The Portal to Texas History
Bale-Tie.
Patent for "a bale-tie which may with readiness and case be locked in position upon a bale and which will be positive in operation and thoroughly efiective for the purpose designed"(lines 8-12)
Date:
October 28, 1902
Creator:
Griggs, James Wesley
System:
The Portal to Texas History
Boll-Weevil or Other Insect Destroyer.
Patent for improvement to the machine set forth in the patent granted to John S. Doak and Alexander G. Farrington on April, 1902, No. 696419. (Page 1, lines 12-14.) The improvements are to use “a pair of troughs connected to a truck and provided with upwardly-projecting wings on their outer edges, spring-arms attached to the truck and pressing normally against the wings and the outside parts of the troughs, spiral springs adjustably mounted on the truck and pressing against the spring-arms, and means for forcing insects from growing plants into the troughs.” (Page 3, lines 74-83.) Illustration is included.
Date:
March 28, 1905
Creator:
Doak, John S. & Farrington, Alexander G.
System:
The Portal to Texas History