Abstract: An elongated shaft (124) for a compound transmission (110) and a method for producing same is provided. The shaft is finish machined from a work piece (200) comprising three segments (204, 206, 208) joined at friction-welded joints (210, 212).

Abstract: A tank assembly which includes an inner storage tank and a surrounding outer containment tank with said tanks defining a substantially uniform space therebetween. The space is filled with a cured light weight porous monolithic insulating material having a porosity sufficient to allow liquid and vapors to migrate through said insulating material to a monitoring point, or points contained within said space. Means are provided for monitoring liquid and vapors located at said monitoring point or points, with the insulating material freely permitting vapors to migrate to an emergency vent port without over pressurization build-up within said space.

Abstract: A grille guard for an automobile has at least one first grille guard member extending generally horizontally so as to protect a portion of an automobile's front and at least one second grille guard member extending generally vertically and attached to the first grille guard member. Each of the second grille guard members has a first generally planar member and a perpendicular second generally planar member generally defining a T-shaped cross-section. The second generally planar member has a plurality of openings formed therein, generally along the length thereof, the openings having a width which is greater than the width of the first generally planar member. The second generally planar member is attached to the first generally planar member by forming a weld between the second generally planar member and the first generally planar member within a plurality of the openings.

Abstract: The particulate collector assembly 10 removes solid particulates from a gas stream. The assembly 10 includes an outer housing 12, an intermediate housing 40, and interior housing 54 to form therebetween a clean gas chamber t14, a particulate-laden gas chamber 41, and a particulate chamber. A plurality or cyclone separator units 62 cooperate with the chambers to remove particulates from the gas stream. Each separator unit is fixedly secured to the intermediate housing and extends radially inward through the inner housing 54. A plurality of cyclone supports 82 are secured to a radially inward end of the cyclone housings and are also secured to a center support pipe 90 within the particulate chamber. This arrangement forms a wagon wheel-like structure which provides the desired rigidity to prevent sagging of the cyclone separator units yet allows the assembly components to expand freely and uniformly to minimize stresses to avoid distortions when exposed to high operating temperatures.

Abstract: A method for electrically attaching electrode wire to a conductor in a defibrillation lead is disclosed. The method comprises melting the end of the wire with a hydrogen torch to form a ball of metal, then crimping or welding the ball to the conductor or to a joining piece attached to the conductor. Also, a hydrogen torch (water welder) may be used to join two or more electrode wires to each other.

Abstract: Spacers are roller welded or laser welded to a disk, welding the interstices between the spacers and the disk liquid tight. Nothing can accordingly accumulate in the interstices to contaminate the centrifugate.

Abstract: A tank construction including an outer shell of steel material comprised of two half members welded together. The half members are formed by a deep drawing process. An inner shell of non-corrosive material is cast inside the outer shell by a rotational casting procedure with the external surface of the inner shell located adjacent the internal surface of the outer shell. The inner shell of non-corrosive material provides a substantially leak-fight liner for the outer shell to thus prevent contact between the contents of the tank and the outer shell. The rotational casting of the inner shell inside the outer shell is accomplished by charging the outer shell with a non-corrosive material and then subjecting the outer shell to a rotational casting movement while heat is applied to the outer shell. The outer shell serves as a mold for the inner shell wherein the mold (outer shell) becomes a permanent part of the completed tank.

Abstract: A honeycomb structure includes at least two corrugated strips having major flat surfaces extending angularly between opposed strip edges. The strips are offset relative to each other and joined together to define a series of cells extending between the strip edges along axes which are oriented at an angle other than normal to the strip edges. Each of the major flat surfaces includes a central depressed portion forming a matching sub-flat surface which is parallel to and connected to the major flat surface by sidewalls which may be substantially perpendicular to the major flat surface. Abutting undepressed portions of the major flat surfaces of adjacent strips and abutting sub-flat surfaces of adjacent strips are joined together so that the strips form a series of I-beams disposed one to a cell.

Abstract: A substrate for a catalytic converter is formed of steel sheets embossed with corrugations in a chevron pattern such that the metal buckles at vertices of adjoining corrugations to form projections extending out of the plane of the sheet. The sheets are stacked with the projections registered to form weld points and capacitive discharge welding secures the sheets together. The substrate is formed in two halves which are clamped together and then secured by end rings.

Abstract: An improved method of manufacturing galvanized steel tubing from steel strip having at least one galvanized surface, which surface becomes the exterior surface of the tubing is provided. In the method of the invention, after the steel strip is roll-formed and welded to complete the tubing and the welded seam is scarfed to remove irregularities, a quantity of an acid solution is applied to substantially only the scarfed area to react with oxidized metal, and then rinsed, leaving the non-scarfed galvanized exterior surface intact. The tubing is then heated to a temperature sufficient to cause the galvanized coating of the exterior surface to begin to flow and the tubing is regalvanized to produce an improved galvanized exterior surface, which is resistant to cracking along the scarfed area.

Abstract: A process for producing multi-layer composite tubes involves extruding an inner plastic tube prior to forming a metallic tube around the inner plastic tube which is subsequently covered with an outer plastic layer. The metallic tube is initially formed to have an inner diameter which is substantially greater than the outer diameter of the inner plastic tube. Subsequent to welding to seal the metallic sheet into the form of a tube, the excess diameter of the metallic tube is reduced in a manner which avoids stretching or elongating the tube. Adhesive coatings can be applied between the various constituent layers of tubes, and a mesh can be interposed between the metallic tube and the outer plastic layer.

Abstract: A process for the production of cup tappets for reciprocating-piston machines having a pressure plate made from wear-resistant alloyed tool steel and a cup casing, welded to the pressure plate, and made from cheap and cold-extrudable steel utilizes a friction welding process to weld the two parts to one another in a crack-free manner. The cup casing blank is produced by the cold-extrusion process and is carbonized before the welding so that good welding results can thereby be achieved despite the considerable strength differences and cross-sectional differences between the pressure plate and cup casing blanks. As a result of a preheating of the pressure plate, an impairment of the cup casing blank during the frictional heating can be compensated and cracks in the workpiece during or immediately after the welding can thereby be avoided.

Abstract: A rotary combustor has a wall formed from water cooled pipes that are secured together by welded perforated strips. The strips comprise cylindrical shaped metallic rods and the perforations are provided either by forming apertures through the cylindrical shaped metallic rods, or by slots formed between segments by spacing segments of cylindrical shaped rods along the pipes, or by gaps formed between welds that are provided at spaced intervals along the pipes and rods. A method of fabricating a rotary combustor wall is also provided.

Abstract: A stairway fabricating apparatus includes a structural machine frame that can support an elongated linear stringer work piece thereupon. A plurality of tread supports include multiple work stations which are movably supported by the frame for simultaneously supporting multiple, selectively pre-spaced stair-step treads in a position against the stringer so that the tread and stringer can be connected to define thereafter horizontal stair-step positions of staircase treads that are of a pre-selected spacing and of a pre-selected angular position with respect to the stringer. Connection of the treads to the stringers can be accomplished by welding, for example, once the correct linear spacing and the correct angular position of the treads are selected.

Abstract: In a method for producing a clad plate by rolling an improvement comprises: a base material, a cladding material, and a cover material overlaid one on another to form a multi-layer structure, and after cleaning joining surfaces of the materials, the cover material is welded to the base material along the periphery thereof, thereby sealing and fixing the cladding material between the cover material and base material, and forming a multi-layer assembly. A member for preventing warp is overlaid over an outer surface of the cover material via a separating agent, and the member for preventing warp and the base material are fixed to one another by welding along the periphery thereof, thereby forming a blank for rolling. The blank is hot-rolled, a rolled article is cut along its periphery to separate the means for preventing warp, and subsequently, the cover material is removed by machining, grinding, or pickling.

Abstract: A method of making a control assembly intended for use in manually regulating the operating speed of power equipment in which fine adjustments may be obtained by rotating the control knob and rapid changes in speed may be achieved by shifting the knob axially. The assembly includes an outer one-piece sleeve adapted to be mounted upon an instrument panel or engine housing and permanently joined to a flexible casing containing the operating wire or cable. A plunger assembly is rotatably and slidably received within the sleeve, the plunger assembly including a thin-walled plunger tube of flexible material having a control knob ultrasonically welded to one end of the plunger. The side wall of the plunger tube has a non-circular (preferably oval-shaped) opening through which a retractable follower (ball) protrudes for engaging the internal threads of the sleeve when vernier adjustment is desired.

Abstract: An air cooled rotor for a rotary internal combustion engine, such as a Wankel type engine, in which the housing has a two-lobed epitrochoidal bore which forms the cavity, the rotor having an outer profile of generally equilateral triangular shape with outwardly curved sides, such as convexly curved sides, and the rotor being mounted on an eccentric journal of a main shaft and being geared to rotate in a planetary manner within the cavity at one third of the speed of rotation of the main shaft, the rotor comprising a body and an insert secured together by one or more rigid fasteners which extend into a passage part of the insert from a passage part of the body which opens to the outer profile of the rotor, the or each fastener extending transverse to the axis of rotation of the rotor, at an angle of between 70.degree. and 90.degree. to the axis.

Abstract: A one piece, welded drum rotor for a gas turbine engine is described. The drum rotor is characterized by disks having a superalloy composition which is different from the seal alloy composition. Several welding techniques are utilized to join the drum rotor components to each other.

Abstract: A method of producing a plate-shaped bearing member for sliding bearings, the structure being composed of a patterned body of supporting bearing material and a lubricant, utilizing a galvanoplastic fabrication step, the method including: producing a mold provided with a pattern of recesses, the step of producing including performing an X-ray deep-etch lithography procedure; filling the recesses to form the body of bearing material; removing the mold from the body of bearing material so that spaces are left in the bearing material; and filling the thus produced spaces with the lubricant.

Abstract: A mask particularly useful in the weld repair of air cooled gas turbine blades and vanes contains a mixture of ceramic particles in a liquid carrier. The mask is applied onto the surface of the blade or vane, and into the cooling holes. Following a sintering treatment, an inert, thermally stable, electrically nonconductive ceramic mask is produced, which is easily removed after welding.

Abstract: The process comprises creating two conductor strips provided with end pieces whose external parts are bent on one and the same side, welding the electric-electronic components to the bent parts of corresponding end pieces, making a mold, inserting into the mold the unit constituted by the strips and the components, pouring liquid sealant into the mold in such a way as to cover the components but not the strips, with this condition being maintained until the sealant has set, separating the mold from the one piece block of sealant in which the components are dipped and from which project, at least partially, end pieces, removing the strips from the corresponding end pieces in order to define with these, the electrical terminations of the components, bending the terminations against the longitudinal sides of the one piece block and cutting the block along crosswise planes that do not effect the components.

Abstract: A valve assembly and the manner of making the same of the character which embodies a hollow cylindrical body having fluid inlet and outlet ports and a slide member, or spool, slidable within the body to control fluid flow through the valve. Sealing elements are carried by the valve body for sealable engagement with the slide member as it reciprocates within the valve body. The fluid passageways which carry the fluid between the inlet and outlet ports of the valve body are uniquely formed internally of the slide member. Because the slide member is precision ground to a uniform diameter over its entire length, there exists no differing diameters or steps which might abrade the sealing means or tend to cause an inadvertant shifting of the spool within the valve body due to fluid pressures exerted thereon.

Abstract: A method of producing propeller shafts for jet-propelled small-sized boats comprises the steps of preparing a main shaft in the form of a hollow round bar, which is a finished part and a pair of auxiliary shafts shorter in length than the main shaft, in the form of solid round bars, which are roughly shaped parts, connecting and integrating the pair of auxiliary shafts with the opposite cut ends of the main shaft by the friction welding process utilizing heat of friction produced by relative pressurized rubbing movement between the parts, and, with the main shaft, which is a finished part, used as a standard, machining the surfaces of the auxiliary shafts, which are roughly shaped parts, to form mount surfaces for fitting thereon such parts as oils seals, bearings, and a propeller.

Abstract: Steam turbine blades are fastened in an outer layer of weld material applied by deposit welding to the outer surface of the rotor body, the composition of the weld material being optimally matched with respect to hot strength and/or corrosion resistance, in particular stress corrosion resistance, to the local mechanical, thermal and chemical requirements. A possible option is additionally to insert a deposit welded intermediate layer of medium alloying element content. Steels with 10-14% Cr, low carbon and additions of Mo and possibly V are preferred as the weld material for the layer.

Abstract: An aluminum torpedo piston is provided with a piston head fabricated from a etal matrix composite material composed of aluminum and silicon carbide fibers that are integrally joined by an inertial welding technique. A 23% weight of silicon carbide fibers to powdered aluminum was selected. Resistance to intense heating which would otherwise cause melting and erosion of the piston is avoided to permit longer, high speed runs.

Abstract: A method for remotely removing and replacing defective tube ends of heat exchanger tubes located adjacent a tubesheet. In the method, a rotary cutting tool is inserted into each defective tube and the tube end portion is cut at a location near the tubesheet, a weld joint between the tube and tubesheet is removed, and the defective tube is then withdrawn through the tubesheet opening. Next, the resulting exposed end of the existing tube is remotely machined using a special rotary cutting tool, then a new replacement tube is inserted through the tubesheet opening and positioned in axial alignment and interfitting engagement with the end of the existing tube, after which the rear end of the new tube is expanded firmly against the tubesheet opening. The front or inner end of the replacement tube is then expanded firmly against the inner surface of the existing tube end, in preparation for welding these tubes together.

Abstract: In an open-end spinning rotor comprising two separately-formed rotor parts subsequently connected to one another, a parting gap between the two rotor parts opens into the fiber-collecting groove and is formed at least partially as a weld seam connecting the two rotor parts. At least part of the fiber-collecting groove may be formed by an insert ring to increase the wear-resistance of the groove. The ring, adjoining a sliding wall of the upper rotor part, is clamped between the two rotor parts and thereby radially inwards limits the parting gap inwards. To produce one of the present open-end spinning rotors, during welding the two rotor parts are so arranged relative to the welding location and rotated past the latter that the weld seam forms on the outside of the spinning rotor and does not project into the fiber-collecting groove.

Abstract: An axle assembly includes an axle member, a flange, and a spindle. The flange is provided with a central bore. An end portion of the spindle extends through the central bore of the flange to contact an end of the axle member. A central portion of the spindle contacts a surface of the flange. Separate weld joints are formed between the axle assembly components at the two contact areas. The welding flash around the outer circumference of the weld may be removed to allow for visual inspection. A preferred method of manufacturing the assembly is by a friction or inertia welding process.

Abstract: A method is provided for manufacturing a heat shield for an exhaust system component. The exhaust system component preferably is of tubular nonlinear configuration. The heat shield is formed from a larger pipe having an internal diameter greater than the outer diameter of the exhaust system component. Appropriately dimensioned inwardly directed supports are formed in the larger pipe. The larger pipe then is bent into a nonlinear configuration substantially identical to the configuration of the exhaust system component. The outer pipe then is cut longitudinally in half along its entire length to define a unitary nonlinear heat shield which can be mounted to the exhaust system component. A portion of the remaining half of the larger pipe can be reattached to the heat shield to provide an air gap pipe along a portion of the length of the exhaust system component.

Abstract: A process and an apparatus for forming an air gap pipe are provided. Inner and outer pipes are bent or deformed into comparable configurations such that the inner pipe can be mounted within the outer pipe. The outer pipe then is split longitudinally by a preprogrammed cutting apparatus. The cutting of the outer pipe terminates just short of the complete longitudinal length of the pipe to facilitate rematching later in the process. The cutter includes a follower to trace the actual configuration of the pipe and thereby to offset differences from one pipe to the next. An array of clamps are provided to align the outer pipe halves relative to one another and to facilitate the reattachment.

Abstract: A piston is formed in two parts. The main part is formed by gravity die casting from aluminum or aluminum alloy and a second part of the piston is formed by a squeeze casting process to produce a material which is stronger and more resistant than the gravity die cast aluminum or aluminum alloy. At least one piston ring groove is formed in the second part. The two parts are then electron beam welded together to form the complete piston. The squeeze cast portion may be reinforced with whiskers or fibres to further improve its properties. This method of construction has the benefit that only the minimum amount of the piston is formed by the more expensive and time-consuming squeeze casting process so that parts of the piston which do not require the improved properties given by squeeze casting are simply gravity die cast. This is of particular benefit in large diesel pistons.

Abstract: A process for the manufacture of half bearings with flanges rigidly connected thereto, made of a steel plate with an antifriction layer, in which the plain (i.e. not yet flanged) half bearing and a pair of flanges are produced and worked separately, and subsequently the two flanges are fixed, in the correct position, onto the half bearing by a welding operation carried out by projection or by condenser discharge. The preparation and working of the thus separate components results in being very economical owing both to the reduction of the operational costs and to a considerable reduction of the cost of the necessary equipment, and the production times are remarkably reduced. The welding step requires very short times and, by the suitable choice of the process used for the welding operation, no deterioration of the antifriction layer applied to the support steel plate occurs, nor any deformation of the plate itself, so that no further working on the finished piece is required.

Abstract: This is a method for repairing low alloy steel steam turbine (both high pressure and low pressure sections) or generator rotors. The defective section of the original rotor is removed and a replacement end is used, with mating attachments machined on the replacement end and the original rotor. The inner portion of the weld joining the replacement end to the original rotor is provided by a narrow gap weld, either by gas metal or by submerged arc welding. The outer 1/2-2 inches of the weld is provided by gas tungsten arc welding. The mating attachment and at least the inside 1/4 inch of the weld is bored out to remove possible crack initiation sites and to provide a smooth inspectable bore. In this manner, a fast and reliable technique is provided which provides accurate alignment, fast, essentially distortion free welding, and the superior mechanical properties of gas tungsten arc welding in the outer, more highly stressed zones.

Abstract: A method for axially aligning adjacent opposing faces of a first and second shaft segment having a respective joint face, of a steam turbine rotor to be welded together includes mating the joint faces of each shaft segment, placing a crushable lip, which axially extends from one of the joint faces, under an axially compressive force, and supporting the joined shaft segments at their axially outboard ends. An apparatus for axially aligning opposing end faces of a first and second shaft segment to be welded together, the first and second shaft segments including a respective joint face. An adjustable support for raising and lowering the joined shaft segments thereby changing the axial distance across the annular groove defined by adjacent opposing end faces to be welded. Means for measuring the force at the adjustable support, provides an indication of the weight counteracted by the support when optimum axial alignment of the shaft segments is achieved.

Abstract: A rotary compressor of the type having an outer metal cylinder casing, a metal cylinder with a vane slot and a vane and the method of assembling the compressor by forming the cylinder with a circular chamber, the center of which is in alignment with the central axis of the cylinder and having a circular outer wall slightly smaller than the inside diameter of the casing. A vane slot is cut in the cylinder which slot is open at one end into the chamber. A vane is placed in the slot to divide the chamber into a high pressure side and a low pressure side. The cylinder has formed therein three curved elongated ports spaced from each other in the cylinder between the chamber and outer wall. The length of each port and thickness of the metal between the port and outer wall of the cylinder cooperate to provide adequate strength for welding and sufficiently flexible to absorb any significant distortion forces caused by welding without transmitting the distortion forces to the vane slot.

Abstract: A collector for electric machines, including a rotationally symmetrical sintered ceramic body and a plurality of radially disposed metallic segments which are separated from each other by one interspace each and which are bonded to the ceramic body via a eutectic intermediate layer. The segments are bonded to the ceramic body in accordance with the eutectic method by being surface-oxidized on their inside narrow side and radially pressed against the ceramic body with the totality being brought to the melting temperature corresponding to the metal/metal-oxide eutectic and subsequently being cooled down again. A preferred embodiment includes: copper segments on an Al.sub.2 O.sub.3 ceramic body.

Abstract: A method of securing a funnel-shaped guide member in the bore wall of the p-shaped casing of a self-adjusting hydraulic tappet for overhead camshaft internal combustion engines comprising first introducing a funnel-shaped guide member (2) into the bore of the cup-shaped casing (1) made of a ferrous material and being initially unhardened, the guide member (2) bearing on a shoulder (9) of the bore and then in any sequence:(a) On that side of the guide member (2) which is opposite the shoulder (9), chiplessly forming material from the bore wall so as to bear sealingly on the guide member (2) and thus to locate the same relatively to the casing (1);(b) Sealing the joint between the cup-shaped casing (1) and the funnel-shaped guide member (2) by welding or soldering.

Abstract: An annular beam 46 which is hollow and which extends circumferentially about an annular flow path 22, 24 for working medium gases is disclosed. The annular beam supports and positions both a shroud 42 and a fabric 44 for containing particles having axial and radial velocity. The annular beam has a first wall 48 and a second wall 50. The second wall is spaced radially from the first wall. A plurality of annular plates 52 extending circumferentially about the interior of the beam. The plates are attached to the first wall and to the second wall. In one detailed embodiment the annular plates have a C-shaped cross section formed of a circumferentially extending rib 58 and two axially oriented legs 60, 62. The radial height of the rib is many times greater than the radial height of the legs. A method of fabricating the annular beam is disclosed.

Abstract: The method of producing a metallic, ceramic, or metal ceramic, part, employing powdered material, that includes:(a) forming two or more oversize powder material preforms respectively corresponding to two or more sections of the ultimate part to be produced,(b) placing said preforms in side-by-side relation, and(c) consolidating said preforms at elevated temperature and pressure to weld said sections together and to reduce the sections to ultimate part size.

Abstract: An air gap pipe and a method for forming the same are provided. The air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples in the outer pipe. The outer pipe is placed in a condition for receiving the inner pipe by longitudinally cutting the outer pipe in half with a pre-programmed plasma arc or laser cutting apparatus. The two halves of the outer pipe are secured together to provide vents, if necessary, for selective dissipation of heat.

Abstract: The invention relates to a multi-lobe composite casing, the inner wall of said casing being constituted by several adjacent cylindrical sectors, each enveloping a screw over the portion of the latter outside the penetration zone. According to the invention the hardest metal layer deposited on the inner wall of the body is applied in the form of a powder containing the desired constituents. This powder is welded to the metallic inner base wall by means of a plasma torch operating on the principle of a transferred arc or a semi-transferred arc. The invention is applied to machines with several overlapping screws of the extruder type.

Abstract: A method for axially aligning adjacent opposing faces of a first and second shaft segment having a respective joint face, of a steam turbine rotor to be welded together includes mating the joint faces of each shaft segment, placing a crushable lip, which axially extends from one of the joint faces, under an axially compressive force, and supporting the joined shaft segments at their axially outboard ends. An apparatus for axially aligning opposing end faces of a first and second shaft segment to be welded together, the first and second shaft segments including a respective joint face, comprises an adjustable support for raising and lowering the joined shaft segments thereby changing the axial distance across the annular groove defined by adjacent opposing end faces to be welded. Means for measuring the force at the adjustable support, provides an indication of the weight counteracted by the support when optimum axial alignment of the shaft segments is achieved.

Abstract: A process of manufacturing at least a nut of a ball-type feed screw and nut system separately from its fastening element and then joining the nut to its fastening element by a connector so as to produce an assembly designed for the specific requirement of each use of the ball-type feed screw and nut system. The invention is used, in particular, in drive devices for machine tools.

Abstract: A tool for the manufacture of a fuel assembly, said tool comprising for each end of an assembly an inner metal plate which can be applied to the bottom of an end member, an outer metal plate which can be displaced, under the action of a jack, along sliding columns fixed to the inner plate, in longitudinal translation with respect thereto and threaded ties traversing corresponding openings in the end member and in the inner and outer plates, able to engage with the internal thread of the guide tubes, and each provided with a head on which is supported a spring for compensating the action of the jack. A method for utilizing the tool is set forth, also.

Abstract: A method is provided for the fabrication of a steel propeller which is designed to have a final shape and size consistent with a conventional propeller design. The resultant formed propeller includes n individual blades, each having boss segments. When the boss segments of the individual blades are joined together they form a propeller having a center boss portion. A center aperture may thereupon be drilled or bored in the boss for mounting the propeller on the shaft of a marine engine. The propeller is formed, in accordance with the method of the present invention, by individually press-forging n steel blanks into individual blade portions which include boss segments. The press-forged blades are then ground with their lateral surfaces beveled to permit them to be welded together into a whole propeller. The center aperture is then formed and the propeller finally heat treated and finally ground.

Abstract: A fabricated reciprocating piston pump having a power end frame characterized by spaced apart elongated precut steel plate members forming the frame sidewalls and forming bearing support members for supporting the jackshaft and eccentric shaft bearings. The shaft bearings are mounted in cylindrical sleeves which are supported by respective pairs of the frame plate members. The pump includes crossheads which are of rectangular cross-sectional shape having flat parallel bearing surfaces and which are supported in the frame by elongated crosshead slide plates which may be adjusted laterally and vertically to align the crossheads with the axis of reciprocation of the pump piston rods. The pump fluid end is made up of premachined cylindrical tube and bar stock sections which are welded together into a unitary assembly including the pump cylinders, the suction and discharge valve housings, and the suction and discharge fluid manifolds.

Abstract: A method of forming a rotor for a vane-type rotary pump. The rotor is generally cylindrical with a plurality of vane slots. A tubular member having generally flat sections separated one from the other by corner portions is formed into the rotor by forming the flat sections into slots by deforming the tubular member. The slots are thereafter formed into the vane slots with a die and the corner portions are formed into the outer peripheral surface of the rotor, also using a die.

Abstract: A method for producing a nondirectional pen includes the steps of drawing a solid metal rod to form a pen blank having three or more radial blade sections extending along the length of the pen blank and equally spaced angularly away from one another; cutting the pen blank into pen bodies having a predetermined length; shaping the forward end of each of the pen bodies into a substantially conical configuration; welding a pen point ball to the tip of the pen body; slotting the pen body from its tip to a predetermined depth through the pen point ball to form longitudinal slots; and plastically deforming the pen body to close the slots.

Abstract: A method for producing a nondirectional pen includes the steps of drawing a metal pipe to form a pen blank having three or more radial blade sections extending along the length of the pen blank and equally spaced angularly away from one another, each of the radial blade sections including an internal gap extending along the length of that blade section; cutting the pen blank into pen bodies having a predetermined length; shaping the forward end of each of the pen bodies into a substantially conical configuration; slotting the pen body from its tip to form longitudinal slots each aligning with the internal gap of the corresponding radial blade section; and providing a hard pen point capable of writing.

Abstract: A method and apparatus are disclosed for carrying out repair, maintenance or testing of apparatus, components and the like in hot cells, more particularly hot cells of reprocessing plants for spent nuclear fuels. The position of damage zones is detected and ascertained with the use of coordinates. Replacement parts and tools are moved into the maintenance and work position in dependence upon the coordinate data, and the repair or maintenance work is automatically carried out under computer control, with remote operation and remote monitoring. For carrying out the work, computer-controlled handling machines and manipulators are used which are adapted to travel in controllable manner in the hot cell. The monitoring and detecting, using coordinates, of damage zones and defects may be carried out with the use of cameras and/or leak detectors.