Abstract: A method of establishing a leak tight and structural connection between a core tube and an accommodating header plate in a tubular heat exchanger, including the steps of positioning the core tube into bores of the header plate and a braze foil, installing a ferrule inside the core tube end, radially expanding the ferrule in the core tube end, thus expanding the core tube end into intimate contact with the header plate in which it is received, deforming a ferrule into pinching contact with the braze foil plate, directing the flow of the braze material towards the contact surface area, and brazing the tubular heat exchanger in order to form a seal at the intimate contact area. A leak tight connection and a tubular heat exchanger having a leak tight connection produced via the noted method are also set forth.

Abstract: A method of establishing a leak tight and structural connection between a core tube and an accommodating header plate in a tubular heat exchanger, including the steps of positioning the core tube into bores of the header plate and a braze foil, installing a ferrule inside the core tube end, radially expanding the ferrule in the core tube end, thus expanding the core tube end into intimate contact with the header plate in which it is received, deforming a ferrule into pinching contact with the braze foil plate, directing the flow of the braze material towards the contact surface area, and brazing the tubular heat exchanger in order to form a seal at the intimate contact area. A leak tight connection and a tubular heat exchanger having a leak tight connection produced via the noted method are also set forth.

Abstract: A system for removing and/or preventing ice build-up on an aircraft includes at least one heat exchanger mounted within an aperture in the tailpipe of a gas turbine engine. The heat exchanger includes an inner plate having a surface which faces inwardly into the tailpipe and which is in direct contact with the heated exhaust gas in the tailpipe, and an outer plate with a surface facing outwardly from the tailpipe and in direct contact with a cooler air stream passing around the turbine engine core. A series of heat exchange fins are formed on the inner plate to direct exhaust gas across the inner plate, and a series of heat exchange fins are formed on the outer plate to direct the cooler air across the outer plate. Heat transfer fluid flows between the inner plate and the outer plate and absorbs heat energy from the exhaust gas. The heat transfer fluid flows through a filter, accumulator and pump system to heat transfer structure integral with the exposed portions of the aircraft.

Abstract: A pivotally adjustable valve disc has a ring seal set in its grooved periphery for contact with a wall of a valve accomodating bore. A flexible, radially expansible member is in the valve groove in a backing relation to the ring seal. Passages admit pressure fluid from the upstream side of the valve disc to the valve groove where the applied pressure is exerted through the radially expansible member toward a radial expansion of the ring seal. In its pressured contact with the seal, the radially expansible member blocks pressure fluid escape through gaps and interfacial joints therein.

Abstract: A method of making leak-tight tube joints, in a non-brazed tubular heat exchanger or the like, including the steps of expanding tube ends out into mechanical contact with a header plate in which they are received, and, in conjunction with this step, introducing a sealant into tube joints. According to one invention aspect, the sealant has the form of a relatively ductile elastomeric or metallic material and is introduced into a joint as a coating on a tube end. In another invention aspect, the sealant has the form of an anaerobic adhesive and is introduced into the joint as a liquid by a capillary action for subsequent curing in the hidden crevices and voids of the joint.

Abstract: A device in a fluid flow path moves to perform a fluid flow control operation at a predetermined high fluid temperature. A mechanism normally locked out of participation in the movements of the device is released at a selected fluid temperature higher than the predetermined fluid temperature and compells the device to a performance of the control operation. The thermostatic device and the locking and release mechanism are incorporated in a unitary structure insuring the carrying out of a control function even when elements of the device having primary responsibility therefor fail or respond inadequately.

Abstract: A method of making leak-tight tube joints, in a non-brazed tubular heat exchanger or the like, including the steps of expanding tube ends out into mechanical contact with a header plate in which they are received, and, in conjunction with this step, introducing a sealant into tube joints. According to one invention aspect, the sealant has the form of a relatively ductile elastomeric or metallic material and is introduced into a joint as a coating on a tube end. In another invention aspect, the sealant has the form of an anaerobic adhesive and is introduced into the joint as a liquid by a capillary action for subsequent curing in the hidden crevices and voids of the joint.

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 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.