Abstract: A tubular heat exchanger, the core of which is comprised of two sets of U-shaped tubes facing in opposite directions. A header plate receives the ends of one set of tubes. Another, longitudinally spaced, header plate receives the ends of the other set of tubes, and the sets of tubes between the header plates are in a substantially interfitting relation. A manifolding means at the one header plate provides for flow of a first fluid at one temperature into the one ends of the one set of tubes and out the other ends thereof. Other manifolding means at the other header plate provides for similar flow of a second fluid at a different temperature through the other set of tubes. Intermediate their ends, the tubes of the different sets are in a nested, companion relation promoting a transfer of heat between the different flowing fluids. The core can be surrounded by a shell apertured for venting or draining of a leaked fluid or for flow of a third fluid over and around the assembled tubes.

Abstract: A fin strip of the kind used as secondary heat transfer surface in heat exchangers. Convolutions in the strip are formed to increase the developed length of a fin strip and thereby to increase the surface area which can be accommodated in a given space, particularly an annular space, without obstruction to flow. In a strip corrugated to provide alternating peaks and valleys, peaks are depressed to form spaced apart peak portions interconnected by intermediately positioning valley portions which add to the developed length of the strip without reducing the space between strip valleys. In an annular space occupied by a fin strip made in accordance with the invention fin density is substantially uniform throughout.

Abstract: A joint for sealing around rods, shafts, cylinders and the like. A metallic sealing ring is configured for axial pressure control and is installed without substantial frictional contact with surfaces to be sealed. An actuating member is a part of the joint and is applied in a manner to expand inside and outside diameters of the sealing ring into contact with the sealed surfaces as a part of the installation process.

Abstract: Valve apparatus including a regulating valve controlling fluid flow through a duct and positionable to produce a regulated downstream pressure from a normally relatively higher upstream pressure. A pilot valve enables a relatively reduced fluid pressure to be used on and in connection with a regulating valve operator. The pilot valve responds to inlet pressure and enables sequential operating steps according to which, in part, the regulating valve moves to a fully open position upon inlet or upstream pressure dropping to a predetermined low value and moves to a fully closed position upon inlet or upstream pressure dropping below the predetermined low value.

Abstract: An oiling system in turbo and like machinery providing cooling, lubricating and fluidized damping functions. A rotor shaft operates in connection with a reservoir of lubricating oil, and with a lubricant supply mechanism, to supply oil to the shaft bearings in an amount properly to cool and to lubricate shaft bearings despite adverse effects of high speed, relatively high temperature operation. At the same time, and along paths of flow leading to and through the shaft bearings, oil films are established and maintained damping attempted vibratory and like dynamic behavior in the rotor shaft.

Abstract: A concept for reducing the number of parts in, and for simplifying the assembly of, a plate and fin type heat exchanger in which a fluid makes plural passes at least at one level of the heat exchanger. A single layer of a secondary heat transfer material replaces multiple detail parts of the prior art and is appropriately configured in conjunction with flow divider members to assure continuous fluid flow to and between fluid passes.

Abstract: A rotor support in turbo and like machinery. A rotor has bearing support in a tubular cartridge member. In a cantilever construction, the cartridge member is fixed at one end to a first housing wall and extends perpendicularly therefrom to a non-rigid mounting in another housing wall in a longitudinal spaced relation to the first. Installed as an interface member between the opposite or outer end of the cartridge member and the second housing wall is a resilient metallic C-ring. The C-ring achieves substantially constant support characteristics throughout wide ranging and repeated thermal expansions and contractions of contacting parts, and over a relatively long period of time.

Abstract: A tube and shell heat exchanger of a brazeless type. A single header construction mounts tubes made for high efficiency heat transfer and supported for damage free operation. A removable mounting plate confines a tube and header core in a shell and is adapted for free mounting and for controlled inflow and outflow of the tube side and shell side fluids. By-passing flow of shell side fluid within the shell is obviated by a recessed mounting of the header allowing a standard spacing of the tube bundle relatively to shell interior wall surfaces.

Abstract: Thermal actuating or like apparatus in which a sight conduit is comprised in a valve housing enabling the changing position of a thermal actuator within the housing to be observed from outside the housing. A fiber optic device acts as the sight conduit and provides for a display externally of the housing of color coded or like markings on the actuator. In one aspect thereof, the invention makes possible a substantially continuous comparison of the operations of redundant actuators so that an operator or user of the apparatus may be alerted to failure of one of the actuator units.

Abstract: A heat transfer or like surface has fins attached thereto in a disconnected, spaced apart, substantially parallel relation, the fins standing upright on edge on the surface. A method of producing and attaching the fins has particular utility in the presence of a curved mounting surface, the fins being formed to allow them to be bent in conformance with the curved surface. Apparatus including an adjustable roller mechanism and a braze fixture are useful in forming and attaching the fin material.

Abstract: An air inlet control inset in the skin or outer wall surface of an aircraft or the like. The control device has an open position in which it is able to capture ram air flowing over the wall surface and which at the same time defines an open flow area through which lower pressure ambient air can be inducted when ram air is unavailable. The air inlet control includes a shutter opening into ram air flow, and an actuating mechanism therefor. In one disclosed form of the invention, the shutter is aerodynamically biased to reduce actuating forces required to close the shutter against ram air pressure.

Abstract: A method of pollution abatement in the outflow of wastewater from a manufacturing plant or the like. A simultaneous precipitation of chromium and flouride contaminants is carried out with a subsequent removal of precipitates under conditions substantially reducing the volume of solids containing water to be handled.

Abstract: A fixture useful both to receive and position parts assembled for brazing and to hold the assembled parts during the brazing process. Part locators in the fixture position the parts during assembly or loading, and remain attached to the fixture during brazing. The locators are influenced to maintain an engagement with assembled parts but are able to yield in controlled directions under expansion resulting from the heat of brazing. The result is to obviate distortion in the brazed article. Locators have a linked relationship with relatively fixed support members, and are inherently self aligning in a vertical sense for uniform contact with the parts.

Abstract: A self-locating sealing assembly in which a compressible sealing member and an encircling retainer ring make an assembly for sealing non-grooved joints. The sealing assembly has special application to a standard type pipe flange having a relatively projected sealing surface. The sealing assembly has clip type locating means which make a peripheral engagement with the projected sealing surface concentrically to locate the sealing assembly and to hold it located while the joint is being closed.

Abstract: A method of making mechanical tube joints in whichfirst and second metal working operations, applied through a ferrule installed in a tube end in a header plate, effect initially a tight fit of the tube end in the plate followed by a sealing contact. The method proposes a machine operation in which multiple header plates, each providing multiple tube positions, are supported for indexing movements relative to a bank of tools for performing the second of the first and second metal working functions, complete sealed joints of all tube positions in all plates being effected in a single series of automatic operations.

Abstract: A fixture useful both to receive and position parts assembled for brazing and to hold the assembled parts during the brazing process. Part locators in the fixture position the parts during assembly or loading, and remain attached to the fixture during brazing. The locators are influenced to maintain an engagement with assembled parts but are able to yield in controlled directions under expansion resulting from the heat of brazing. The result is to obviate distortion in the brazed article.

Abstract: A heat exchanger-canister combination, the canister being used to hold a solid state refrigerant absorbing heat from a circulating fluid heated at a relatively remote source, the walls of the canister being used to transfer heat into the contained refrigerant.

Abstract: A method, in the art of brazing metallic parts to one another, including a step of subjecting a brazed assembly to relatively high temperatures over a relatively short period of time in a manner to induce blistering of unbrazed or weakly brazed areas. Blistered material can then be removed, leaving a soundly brazed structure which in use will not fragment and give up loose materials to ambient surroundings.

Abstract: Apparatus indicating the quantity of fluid in a closed and pressurized fluid circulating system. The apparatus compensates or corrects for fluid expansion and contraction due to temperature change so that the indicated quantity is the true quantity. The apparatus includes a direct acting, mechanical connection from a fluid accumulator-reservoir device to an indicator. A thermostat sensing fluid temperature introduces a correction into the mechanical connection.

Abstract: A method of making a heat exchanger in which extended heat transfer material, such as a fin annulus composed of thin corrugated deformable metal, is installed in annular fluid flow paths defined between concentric tubes. Concepts of electromagnetic forming and metallurgical bonding are used in a unique combination of steps to arrive at a method well suited to economical production and which at the same time assures a high efficiency level of heat transfer and leak protection effects.