Stewart Warner Corporation

Vernon N Tramontini

Robert G Ireland

A method of vacuum brazing large assemblies in an enclosed evacuated furnace with brazing material containing a gettering agent in the area of the joints to be formed, including sensing the temperature of the assembly to be brazed adjacent the joints on the exterior surface of the assembly, and shifting an additional quantity of gettering agent from a cool zone into a hot zone in the furnace as the surface temperature of the assembly approaches the brazing temperature. A furnace adapted to carry out this method is also disclosed.

Vacuum brazing process with improved gettering

An air cooling tower system for condensing exhaust steam in power plants, that has water cooling augmentation to maintain the plant cooling capacity during high atmospheric temperature periods. The cooling tower includes a plurality of banks of brazed aluminum plate and fin type heat exchangers arranged in inverted 'V' shaped sets. These heat exchangers cool ammonia used as the cooling fluid in the primary condenser for the power plant turbine exhaust steam. Each of these heat exchangers has a core consisting of a plurality of parallel aluminum plates spaced apart by fin assemblies that define a plurality of fluid passes. Approximately every other one of these passes has closed sides that open at the ends of the core to headers and define ammonia passes. The passes adjacent the ammonia passes are open at the sides and define air passes that permit the free flow of air transversely through the heat exchanger cores. An additional pass is provided adjacent every fourth one of the ammonia passes and these have closed sides and ends and define the passes for the cooling water. The water passes communicate at the bottom of the core with a water inlet manifold and at the top of the core with a water outlet manifold. The cooling tower system is designed so that at 55 degrees Fahrenheit air temperatures or below, the cooling air alone will provide the necessary cooling for the ammonia to satisfy plant requirements. Above 55 degrees Fahrenheit air temperature, cooling water from a separate water tank is pumped through the water passes to provide an additional cooling effect to maintain the design cooling capacity.

Dry cooling tower with water augmentation

A vehicular radiator having a core assembly consisting of a plurality of vertical rows of fluid carrying tubes separated by a plurality of rows of fins with the outer fin rows having mounting surfaces connected to side channels so that the core assembly may be suitably supported. To permit free expansion of the fluid carrying tubes and to reduce the supporting stresses for the core assembly, upper and lower header plates are provided carried by the tubes but unconnected to the side channels to permit free relative movement therebetween caused by thermal expansion and contraction. Upper and lower tanks are provided connected to the upper and lower header plates and these have suitable inlet and outlet fittings adapted to be connected to the cooling circuit of an associated engine. As a result of eliminating the supporting requirement for the header and associated tanks, the upper tank may be made smaller than customary, reducing the weight and size of the overall radiator through the provision of an auxiliary reservoir for the upper tank.

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Indianapolis, IN, United States of America

Vernon N Tramontini