Abstract: A refurbished turbine vane and method of producing the same. Used turbine vanes are cleaned, annealed and slotted adjacent their ends, after which the cooling passages are welded closed and all cracks welded over, on both leading and trailing edges. The trailing edge, for a vane having a short chord, is built up by welding along its full length with an alloy wire, after which the slots that were cut adjacent the ends are closed, also by welding. Then the worn surfaces of the vane are built-up by a plasma spray process, using a metal powder with added silica, to a thickness as great as 30 to 40 thousandths of an inch. The built-up vane is then sintered and thereafter surface finished to conform to the original contour of the blade when new. The cooling holes are finally recut, and the vane polished as required and inspected.

Abstract: Aluminum or aluminum alloy scraps or wastes are broken into chips and converted into a cylindrical body to be extruded under a temperature suitable to produce extruded structural profiles. The method is characterized by the fact that the interior of the extruder is evacuated prior to or simultaneously with the extrusion step so as to exhaust air entrapped in the cylindrical body.

Abstract: A method of refurbishing the air seal flanges of turbine blades which have become worn, comprising the steps of adding a bead of welding material to the opposite side portions and the edge portions of the flange so as to build up those areas which have been worn away, and thereafter removing controlled amounts of the built up areas so as to restore the piece to its original geometry. In the latter step, the blade is clamped in a first machine having a pair of abrasive belts and a pair of pivotally mounted pressure shoes engageable with the backs of the belts respectively, such that their abrasive surfaces can be brought into engagement with the opposite sides of the air seal flanges. Controlled quantities of the built-up flange can be removed, depending on the degree of advancement of the shoes.

Abstract: Method and device for removing the crank-shaft of an internal combustion engine, wherein the frame of the engine is tilted on one side about an axis parallel with the center-line of the crank-shaft, and said crank-shaft is extracted from below.

Abstract: Cylindrical water tanks, such as used for water softeners, inherently corrode at the bottom and herein is taught that the tanks are repaired by removing the bottom dish with the use of a novel tool that moves around the tank and bears thereagainst with a substantially uniform force thereby readily following the tank's contour, by sandblasting the interior for cleaning, by installing a new bottom dish to the cylindrical body with the use of a novel tool that automatically stops further penetration of the dish into the tank when a predetermined overall height of the tank is obtained, by welding the bottom dish to the body, by coating the interior with a non-corrosive plastic with the use of a novel spray gun apparatus that radially sprays the liquid plastic onto the inner walls of the tank as the spray nozzle moves axially therein and then the spray nozzle is adjusted to cause the spray to form an upward diverging cone to coat the underside of the top cover, and finally by allowing the plastic to harden.

Abstract: A method for manufacturing a refrigerating system. According to the method, adhesive is applied either to outer faces of an intermediate insulating body or to inner faces of a pair of outer metal skins which are to engage the outer faces of the insulating body to form a wall structure therewith, or to all of these faces. Evaporator and condenser coils are introduced into grooves of the insulating body at opposed faces thereof so as to directly engage the metal skins. These coils may be introduced either before or after the application of the adhesive. Then after the skins are applied to the assembly of the insulating body and coils, the assembled insulating body, coils, and skins are situated in an evacuated atmosphere for eliminating any air bubbles in the adhesive while tightly pressing the metal skins against the insulating body and coils.

Abstract: A method of manufacturing a flat heat-exchanger tube from thin, flexible metal strip material, comprising the steps of bending first and second longitudinal edge portions of the strip into an overlapping position over a central portion of said strip, bending the innermost edge portion in the vicinity of its edge at an angle to the remaining portion of said last mentioned edge portion to form a support flange and pressing said edge portions together under reaction from said central portion, via the support flange pressed thereagainst, while joining said longitudinal edge portion by means of soldering.

Abstract: The invention relates to a machine for manufacturing cable forms of the kind used, for example, in relay sets. The machine is fully automatic insofar as the cables are formed at least to the stage where each wire is terminated with the insulation stripped from the ends, the ends being arranged such that when the manufactured cable form is placed on the relay set or other apparatus the wire ends are in the optimum position for connection to the terminals of the apparatus. The machine comprises a holding table slidable along a longitudinal frame and supporting a plurality of holding clutches simulating the configuration of terminals which, in use, the wires will be connected. The holding clutches firmly hold the ends of wires being used to make the cable form. A rotary indexing head is mounted above the table and is adapted to actuate any one of a plurality of different wires into an operating position wherein it may be introduced into a holding clutch.

Abstract: Method and apparatus for bubble shearing are disclosed in which nascent bubbles are formed by flowing gas through the very small capillary openings of a gas diffusing surface into a moving liquid that shears the nascent bubbles off as it moves past the capillary openings. In the apparatus disclosed, the gas diffusing surface forms one wall of a liquid transmitting slot through which the shearing liquid flows as it shears off fine gas bubbles.A gas transmitting body or gas "bar" for use in the bubble shearing apparatus is disclosed. The gas transmitting body has at least one wall with a plurality of gas transmitting passages extending therethrough terminating in capillary openings. The maximum size of the capillary openings is given, as well as the maximum distance of the most remote capillary openings from an edge of the gas diffusing surface defining one boundary thereof. Improved and preferred values for these parameters are also given. Other structural features of the gas transmitting body are disclosed.

Abstract: In rotary piston engines including apex seals each comprising a main body constituting a substantial part of the seal, an end piece disposed in abutting relationship to an end of the main body through slanted cam surfaces which serve to force the end piece axially outwardly to engage with the inner surface of the side housing when the end piece is resiliently biased radially outwardly by spring means, the method of assembling the apex seals in the rotary piston engine, which comprises providing a projection of consumable material between the main body of each seal and the spring means so as to retain the spring means preventing the end piece from being displaced over the end face of the center housing, the consumable material being of such a type that dissipates under heat produced during engine operation.

Abstract: Before skins are brazed on airfoil cores having cooling channels recessed into the surfaces thereof, the surfaces of the cooling channel walls are covered with a layer of oxide material. The oxide formation selected is one that is not reducible in dry hydrogen. Thereafter, when the normally employed hydrogen or vacuum brazing operation is conducted to apply the airfoil skin, the oxide-covered sides of the cooling channels will not be wet by the molten braze alloy. Plugging of the covered cooling channels during manufacture is thereby greatly reduced.

Abstract: Airfoil-shaped bucket cores having grooves recessed into the surfaces thereof must be covered with an outer layer to provide the requisite aerodynamic and wearing surface and to define the cooling passages. In order to apply this outer layer by flame spraying (or comparable method of particle deposition), the core surface is first covered with a substrate layer. This substrate layer is provided with means by which later-applied surface coating material will be anchored in place. Thereafter, the outer material is applied (as by flame spraying, for example) and the surface thereof is ground and polished to dimension as may be needed.

Abstract: A method of prolonging the life of a carbon anode ring furnace is disclosed wherein portions of the confronting refractory brick flue walls of the furnace which have partly collapsed can be readily straightened. The refractory bricks of the collapsed portion of a flue wall are urged back into the plane of the wall by interposing a hydraulic jack between the closely spaced flue walls and actuating the jack to apply opposing forces to the wall. The jack is positioned and actuated in a number of locations corresponding to a predetermined circular pattern about a deformation zone to successively reduce the deviation of the bricks of the deformation zone. A tie brick is thereafter inserted between the walls to maintain them in their normal spaced relation.

Abstract: A hand portable device for fastening a holding bar on a printing blanket and method of fastening such holding bar is provided and the device employs cooperating rollers to urge portions of such holding bar in clamping engagement against opposed surfaces of the blanket.

Abstract: A method for the manufacture of hollow articles comprising providing a first sheet of metal, placing on said first sheet a weld-inhibiting material in a pattern corresponding to a predetermined configuration of fluid passageways, forming an assembly by superimposing a second sheet of metal upon the surface of said first sheet bearing said pattern, pressure welding said assembly in the areas thereof not separated by weld-inhibiting material, and expanding the areas separated by said weld-inhibiting material, wherein the weld-inhibiting pattern provided is so configured that when said assembly is expanded, a marker structure is formed which is situated so as to guide the determination of the final linear dimensions of said article. The foregoing marker enables the rapid, automated sizing of articles such as heat exchange panels produced by the above process.

Abstract: A novel method for the production of a thin shell outer member for an overrunning roller clutch with cylindrical rollers at each end and a central portion profiled to form camming surfaces for the grip rollers and the two ends having smooth cylindrical recesses for the cylindrical rollers.

Abstract: An improved tip cap configuration for a turbomachinery blade includes tip cap seats formed integrally with and located on the inner sides of a hollow turbomachinery blade. Tip cap retaining members are also formed integrally with the inner wall of the blade and are spaced a short radial distance from the tip cap seats. The blade is initially provided with a flared open end and the tip caps are positioned on the seats and the flared end is crimped so as to capture the tip cap between the seats and the retaining members. The crimping operation is stopped at a point wherein a smooth outer contour is obtained for the blade in the region of the tip cap. A method of making such a blade is also disclosed.

Abstract: A catalytic reactor of oval cross section comprises a generally cylindrical catalytic substrate clamped between paired housing shells and spaced therefrom by a mesh support that extends around the oval periphery of the substrate and slightly overlaps the latter's axially opposite ends to provide locating projections. The support and housing are preferably interlocked by one or more pairs of inwardly opening channels of the housing having portions of the mesh support confined therein, each pair being spaced axially by a rib of the housing projecting into the mesh support. The housing has axially endwise converging cam portions adjacent and axially endwise of the opposite ends of the substrate to engage the locating projections and center the assembled substrate and mesh support within the housing during manufacture of the reactor.

Abstract: Forming of wire contacting jaws for a channel type electrical terminal of conductive sheet metal is disclosed, without diminishing the length of the terminal, by first obtaining a stretching of the conductive metal into a preliminary displaced configuration, then reverse forming and coining the metal into a jaw formation deeper and narrower than the first configuration, and then substantially removing the reverse curvature, with added coining and stretching of the metal, into a final jaw formation which is deeper and narrower than that obtained in the second step, without rupture of the metal. Slight reverse curvature is retained adjacent the juncture of the sides of the jaw with the body of the terminal.

Abstract: A method of manufacturing arcuate sealing strips for the pistons of rotary piston machines. The running surface on one face of the strip carries a wear-resistant hard layer.