Abstract: The cooling system includes a cyclically operating cooling-medium compressor driven by the vehicle engine. At low to medium engine speeds, corresponding to speeds from idling to city-driving speeds, the cooling system develops a cooling power sufficient to satisfactorily cool the interior of the passenger compartment. At higher engine speeds, corresponding to highway travel, the cooling power developed by the cooling system is automatically decreased by automatically decreasing the per-cycle volumetric throughput of the cooling-medium compressor. The automatic decrease is effected in automatic response to the reaching of a certain engine rpm or a certain condensation pressure in the condenser of the cooling system. In the illustrated embodiment, the compressor is a sliding-vane compressor, and the per-rotation volumetric throughput thereof is decreased by arresting certain ones of the vanes in the retracted position.

Abstract: A vehicular air cooling-ventilating system which provides cooled, filtered, and dehumidified air for the operating cab of a large off the road vehicle in a unitary package usually mounted in the cab overhead. Unit utilizes available hydraulic fluid power for all shaft horsepower requirements. A unique compensated drive system provides operation of the pulsating torque compressor load by a hydraulic motor prime mover. The compensated drive system also provides operation in the presence of pulsating hydraulic fluid pressure commonly encountered in the supply of large vehicles. Internal components are protected from contamination by an air operated vent cover. Additionally, the difficult condensate handling problem caused by motion of the vehicle and consequences of condensate loss in the vehicle cab is overcome through the use of a flow metered baffle design in the condensate receiver.

Abstract: An engine for driving the compressor of an air conditioner system which is powered by the heat of the exhaust manifold of a vehicle internal combustion engine. The engine of the invention includes a closed cylinder with a piston dividing the cylinder into two compartments, and with the piston rod extending beyond one end of the cylinder to power both the air conditioner compressor pump and a liquid pump that supplies the engine with pressurized liquid. The inlet port of the engine is located on a cylinder wall midway between the cylinder ends, with bores in the piston linking the inlet port with each cylinder compartment at the position of the cylinder that reduces the particular compartment to its minimum volume. Each end of the cylinder is surrounded by a heated exhaust jacket so that the liquid fed into the cylinder compartment is vaporized to expand the cylinder compartment and drive the piston.

Abstract: An aerodynamic enclosure for a refrigerated trailer. The enclosure fits over the upper portion of the front wall of the trailer, enclosing the factory installed refrigeration unit and motor. The enclosure has an upper front opening which fits around the air opening of the refrigeration equipment. A second front opening is covered with hinged doors to provide access to the refrigeration equipment. A pair of side openings are covered by hinged doors and provide access to the refrigeration controls and equipment. A top opening provides an outlet for air from the enclosure. The enclosure is symmetrical about its vertical axis and is aerodynamically contoured to reduce wind resistance and provide substantial economies in fuel consumption. An auxiliary door may be used to cover the upper front opening of the enclosure when the refrigeration equipment is not in use.

Abstract: A system that samples and uses heat from a hot exhaust as a source of heat o the hot side of a Vuilleumier compressor is driven by some external rotational input means to overcome the friction of a regenerator matrix containing hot displacer and cause reciprocal movement of the hot displacer. The Vuilleumier compressor produces alternating pressure waves that are applied to a cold finger array of free-displacer refrigerators wherein air is passed over the cold ends of each of the cold fingers to cool or refrigerate some desired area and heat is removed from the hot ends of the cold fingers and exhausted in another direction.

Abstract: A refrigeration type air conditioning apparatus employing a heat transfer medium for use in a vehicle having a large passenger area, comprising a vehicle engine driven compressor and a pair of electric motor driven compressors, all of which are connected to a pair of condenser coils via a discharge manifold and to a split evaporator coil via a suction manifold while each of the condenser coils is connected to one half of the evaporator coil via an expansion valve.

Abstract: The cooling system includes a cyclically operating cooling-medium compressor driven by the vehicle engine. At low to medium engine speeds, corresponding to speeds from idling to city-driving speeds, the cooling system develops a cooling power sufficient to satisfactorily cool the interior of the passenger compartment. At higher engine speeds, corresponding to highway travel, the cooling power developed by the cooling system is automatically decreased by automatically decreasing the per-cycle volumetric throughput of the cooling-medium compressor. The automatic decrease is effected in automatic response to the reaching of a certain engine rpm or a certain condensation pressure in the condenser of the cooling system. In the illustrated embodiment, the compressor is a sliding-vane compressor, and the perrotation volumetric throughput thereof is decreased by arresting certain ones of the vanes in the retracted position.

Abstract: Locomotive environmental system to be mounted in the roof of a cab for controlling the environment within the cab which includes a housing having an upper chamber arranged above the roof line of the cab and having one compartment for a condenser unit and another compartment for a compressor unit, a blower in the compartment housing the condenser unit for circulatng air through the condenser compartment and also through the compartment housing the compresser unit, a lower chamber arranged below the roof line of the cab and housing an evaporator unit for the system together with blower means for circulating air through the lower chamber and the cab, wherein the motors for the compressor unit and the blower associated with the condenser unit are driven by the same source of variable power.

Abstract: This invention relates primarily to an air cooling apparatus primarily adapted for use in automobiles and comprises a unitary structure consisting of a compressor, condenser and evaporator, all connected to perform their normal operations in the cooling of air and which combined unit is rotated from the crankshaft of an automobile through a unique system of mountings and connections, wherein an adjustable strut structure is provided for supporting one end of the rotating compressor, condenser and evaporator and which supporting strut structure may be attached to an existing automobile with comparative ease, the strut structure also provided with means for maintaining the proper tension on the belt connecting the shaft to the crankshaft of the engine.

Abstract: Closed-circuit cooling processes, and apparatus for performing such processes, in which a working fluid is successively compressed, condensed through the removal of heat, expanded, and vaporised by take-up of heat from a fluid to be cooled, before being again compressed, the working fluid having been obtained by mixing refrigerant, having a boiling point within the range 0.degree. to 60.degree. C at atmospheric pressure, with air having a partial pressure initially, that is prior to use and throughout at least a major part of the volume of the circuit, of at least 0.05 atmospheres absolute.

Abstract: An air conditioning system for a railway vehicle operable from an applied high voltage direct current, which system includes an alternating current induction motor driving a variable speed, helical screw-type refrigerant compressor. A variable frequency AC drive circuit is provided to power the motor from the high voltage direct current. The output frequency of the drive circuit is varied according to the cooling demand of the vehicle.

Abstract: An air-conditioning system particularly, but not exclusively, for vehicles employs a single liquid/air heat exchanger and means selectively to supply either hot liquid or cooled liquid to said heat exchanger whereby selectively to heat or cool the air passing through said heat exchanger. As applied to a motor vehicle, the system only requires a single heat exchanger on the interior side of the vehicle bulkhead.

Abstract: A method and assembly for air conditioning a motor home vehicle or the like employing a heat transfer medium and cooling both the front passenger area and the rear living area using a single compressor source. The assembly having a compressor driven either by the vehicle's engine or a compressor driven by an electric drive motor, a first and second condenser mounted on the roof of the vehicle, a first, second and third evaporator mounted to a first, second and third blower, the first evaporator and first blower mounted under the dash of the vehicle and the second and third evaporators and second and third blowers mounted on the roof of the vehicle.

Abstract: An air conditioner is mounted to the roof of an operator's compartment of mobile equipment wherein a hydraulic circuit is empowered by the variable RPM prime mover for the vehicle while the fans and compressor of the unit are driven at a constant speed by means of a single hydraulic motor having an axially vertical shaft journaled in its case and extending above and below the case to drive the evaporator and condenser fans and the compressor.

Abstract: An automotive air conditioning system including series connected condenser, expansion valve and evaporator components having refrigerant supplied thereto by a mechanical refrigerant compressor; the refrigerant compressor includes a drive shaft connected to the output of a variable speed traction drive transmission having an input shaft connected to a belt pulley for drive from the vehicle engine. The transmission includes a compact carriage that supports friction cones at opposite ends thereof and includes an axially adjustable speed transfer spool for bridging first and second pluralities of friction cones on either end of the carriage to vary the power transfer from the input shaft to an output shaft so as to manually adjust the circulation of refrigerant flow through the system in accordance with ambient temperature conditions.

Abstract: In an engine powered vehicle having a generator, a storage battery, and a refrigerated compartment having a refrigerated cooling coil, a compressor is connected to the cooling coil, the condensor is connected to the compressor. A refrigerant expansion means is connected to the compressor and to the cooling coil. In one embodiment a second compressor is operatively connected to the vehicle engine; in another a second condensor is connected to the second compressor, and in another the refrigeration system includes a third compressor connected in parallel with the first compressor and the second compressor. A second condensor, a second means to expand refrigerant, and a second cooling coil is connected with the third compressor to refrigerate two separate compartments. Each embodiment preferably has a control to operate the systems relative to the refrigeration demand of the system.

Abstract: A combination high pressure relief valve and magnetic clutch disconnect switch for an air conditioning compressor which utilizes an automatically resetting valve member. The escape of pressurized refrigerant under control of the relief valve pressurizes the interior of a cap member on the end of the relief valve and thereby disconnects the ground circuit portion of the electromagnetic compressor clutch. This renders the system inoperative until the cap can be replaced and the original cause of the high pressure is determined and remedied.