Abstract: A method and an apparatus for manufacturing a hollow curved member, especially a curved pipe as well as the curved member or pipe produced by the method and apparatus. A blank is formed by rotating fluid material in a mold having a toroidal cavity about an axis displaced a predetermined distance from the mean longitudinal axis of the cavity and solidifying the fluid material. The blank is removed from the mold and a toroidal inner surface is machined into the blank so as to provide a passageway therethrough. In the preferred embodiment, the toroidal cavity is circular in cross-section and has a circular arcuate axis and the inner surface is machined into the blank coaxial with the outer surface of the blank.
Abstract: A method of splitting bearing rings in a direction obliquely crossing their axes. This method comprises forming a notch of substantially V-shaped cross-section in the inner or outer peripheral surface of a bearing ring obliquely or in a V-direction, or forming a notch of substantially V-shaped cross-section in an end surface of a bearing ring at a predetermined angle with respect to the surface, heat-treating the bearing ring, and exerting wedge stress along the notch by a wedge type press-breaking tool.
Abstract: A method of remodeling a control section of a backhoe comprising adding a relay unit including relay rotary sleeve shafts and rotary shafts rigidly attached to a carrier base to extend in two parallel rows, and operatively connecting the rotary sleeve shafts and rotary shafts selectively to drive rods which are pushed or pulled by an oscillation in one direction of one of the hand levers, respectively, and to driven rods operatively connected to those of the valves which should be actuated by the drive rods, respectively.
Abstract: Improvements to guide tubes for the fuel assemblies of light water nuclear reactors, said assemblies being immersed in operation in the cooling water of the core of such a reactor, the guide tubes being of the type made from zircaloy and fixed at their two ends respectively to an upper end part and a lower end part made from stainless steel or Irconel and which incorporate devices for braking the fall of the control rods which they house during the rapid shutdown of the reactor, wherein the said braking devices are constituted by means for restricting the diameter of the guide tubes comprising for each guide tube a zircaloy inner sleeve spot welded to the said guide tube and whose internal diameter permits the passage, with a calibrated clearance, of the corresponding control rod, the sleeve being distributed over the lower portion of each guide tube and associated with orifices made in the actual guide tubes to produce the progressive hydraulic absorption of the end of the fall of the control rods.
June 3, 1983
Date of Patent:
August 20, 1985
Commissariat a l'Energie Atomique, Framatome
Abstract: A non-reciprocal latching phase-shifter uses a slab of a high-dielectric constant material embedded in ferrite to substantially concentrate the electromagnetic energy within the dielectric slab, thus eliminating the need for a conductive waveguide, and to provide for a small amount of energy leakage into the adjacent ferrite whose state of magnetization can be varied, thus providing for a variable phase-shift. In one embodiment, parallel high-K dielectric strips are sandwiched between grooved ferrite sheets to provide a low-cost phase-shifter array.
Abstract: A method and apparatus are provided for replacing the bearing between the sampson post and the walking beam of an oil well pump. The walking beam and the pitman arms are securely fastened together to prevent relative movement therebetween. The head portion is adjustably restrained against the force of the counterweight. The walking beam is allowed to pivot on the connection between the walking beam and the pitman arms so that the walking beam moves away from the sampson post so that the bearing may be replaced.
May 4, 1983
Date of Patent:
July 2, 1985
Marathon Oil Company
Larry E. Bryan, Richard W. Grove, William F. Primus
Abstract: In the production of metal- and other strip materials in continuous lengths and in several operations or processing facilities, such strip is wound into coils of finite length after each operation, then transported to the next operation and again welded into one continuous web, coil after coil.In order to avoid this wasteful practice a method and apparatus is disclosed which consists in feeding said strip emerging from one operation, without cutting it, directly into a variable capacity accumulator and feeding it out again from said accumulator into the apparatus of the following operation at the speed that such operation requires.
Abstract: In a method of rolling wide strip starting material, an ingot slab is rolled to the desired wide strip width by having its shorter sides edge-rolled. In order to save time, energy, material and investment capital, the ingot slab has a cross-section tapered towards the shorter sides in a wedge-shaped or curved manner at both edges, and is edge-rolled approximately to the wide strip width desired while filling out the rectangular shape.
Abstract: A method and apparatus for the internal or blind side sealing of a small local leak (such as a void in casting). The sealing is accomplished by first drilling a hole in the conduit or container where the leak is located and setting a blind side sealer apparatus in the hole. The device consists of a guide that fits loosely into a drilled hole; a slitted metal conical capping means having an outside diameter approximately the same as the drilled hole diameter; a sleeve; and a retractable stem. The slitted cone is filled with a viscous sealant and the slitted cone part of the sealer assembly is pushed through the hole. Once on the other side of the hole, the slitted cone expands enough to prevent it from backing out. When the stem is pulled outward, the slitted cone is forced against the pipe or container wall, spreading the sealant. The stem then snaps at a necked-down position, signaling completion to the operator.
Abstract: A method of manufacturing the outer housing of a metal inert gas welding gun comprising an investment cast process which eliminates the necessity of providing a separately machined threaded end for the gun, thus providing a gun housing which is not only less expensive, but also much stronger than previously available gun housings of this type.
Abstract: An improved method of removing a seal unit from a process vessel bottom entering agitator assembly and reinstalling a seal unit therein wherein a selectively elevatable table which is movably mounted on a pair of horizontal rails is utilized in lowering and raising seal units during the removal and reinstallation thereof.
Abstract: A method is disclosed for the compaction of control rod blades and fuel channels of a boiling water reactor. Upper and lower portions of a control rod blade are removed from a cruciform shaped main blade structure. Each elongate tubular fuel channel of substantially square cross section is sectioned into four substantially congruent panels. A plurality of panels are stacked into each quadrant of the main blade structure substantially parallel to the long axis thereof.
Abstract: There is described a method for the hot repair of the protective layer provided on the permanent lining of a tundish of a continuous casting plant. The method can be carried out simply and quickly, with thermal losses of the tundish being largely prevented and heat influences on the personnel being eliminated, by retaining an amount of residual steel with a slag layer in the tundish. The residual-steel amount plus slag layer is cooled till solidification, is removed from the tundish in a still hot state, and a repair-mass constituting the protective layer is sprayed onto the permanent lining of the still hot tundish.
July 14, 1981
Date of Patent:
March 26, 1985
Otto Hoyer, Norbert Antensteiner, Walter Fortner
Abstract: A method for manufacturing a heat exchanger using a non-eutectic solder which melts over a melting range is disclosed. The soldering is carried out in two successive soldering steps, first at a soldering temperature which is at the lower end of the melting range, and then at a higher soldering temperature within the same range. Flat plates and straight-edge strips are used for the first soldering step. The straight tube of flat cross section produced in this manner is then curved in the desired fashion and soldered in final manner by the second soldering step.
Abstract: A method for manufacturing a superconducting hollow conductor, with superconducting conductor strands arranged in the interior of a tube through which coolant flows, which allows simple manufacture of long conductor sections, includes enclosing the helical conductor strands in a longitudinally welded tubular carrier body and subsequently drawing the carrier body to an inside diameter which is smaller than the original outside diameter of the helical conductor strands to obtain a mechanically strong conductor arrangement with a defined uniform flow cross-section for the coolant.
Abstract: A heavy-duty composite radial journal bearing and a method to produce it is described. A pattern of openings is formed through a bearing sleeve representing, for instance, axially aligned metal bars. The openings are subsequently filled wth a metal dissimilar to the sleeve. Filling may be done with the sleeve in place either on a journal or in a housing, in which case the bearing becomes integral to that member by fusion. Alternately, the sleeve may be filled upon a nonwettable mandrel and subsequently used as a floating ring or as a bushing. Final finish machining reveals a pattern which exists throughout the bearing of alternating areas of relatively hard metal and a softer antigalling metal.
December 28, 1981
Date of Patent:
February 19, 1985
Smith International, Inc.
Edward Vezirian, Richard J. Quinones, Alan W. Lockstedt
Abstract: The present invention teaches, without limitations, a method for replacing the worn out spindle of a rotary tablet press. This disclosure shows how the original rotary tablet press is reworked to remove the worn spindle. The method disclosed in this application enables the replacement spindle to allow the rotary tablet press to function in accordance with its original specifications. Rebuilding the rotary tablet press results in substantial savings when compared to purchasing a new tablet press.
Abstract: A method of mechanically producing in a continuous process a cross-fin type heat exchanger having a large fin pitch for use as a natural convection type radiator or a solar heat collector including heat collecting surfaces formed by bending the fins. A plurality of openings, respectively, accommodating a pipe therein, are formed in a continuous plate and the plate is cut into a plurality of strips of a width equal to a predetermined fin width. The strips are twisted through 90.degree. while being fed and set on a jig in such a manner that the openings formed in the strips are aligned in a straight line and the strips are spaced apart from one another by a predetermined fin pitch. The pipes are inserted in the openings in the strips in such a manner that each pipe extends through the openings in the adjacent strips set on the jig. The pipes are secured to the strips so that the strips serve as fins, and the strips are cut at any time as desired after being set on the jig.
Abstract: A method of repairing a water-cooled electrode holder for use in electric furnaces, of the type comprising a base and a bowl secured to the base for encompassing and supporting a vertical cylindrical electrode. Such holders suffer deterioration in the region of the inner surface of the bowl which is opposite the base. According to the invention, the outer semi-cylindrical portion of the bowl is cut off on a substantially diametral plane and replaced by a new portion. The new portion is formed from a flat slab of copper. To make the water passageways in the new portion match those in the old, a pattern of the locations of the passageways in the old portion is made and transferred to one end of the slab. The slab is then drilled lengthwise at the locations transferred from the pattern, and the holes are filled with sand and plugged. The slab is then bent to U-shape to comprise a semi-cylindrical portion having two straight ends thereon.