Abstract: There is provided a heat-exchanger system for heat-exchange between a gas such as air and a liquid such as water, comprising at least one heat exchanger unit which unit comprises at least one tube which is wound to form a hollow coil and which is arranged to conduct said liquid, characterized thereby, that said coil is closed or covered at one end; in that the other end of said coil which is open, is placed against a base plate having an opening which is aligned with the coil opening and has a size and shape corresponding to those of the coil opening; and in that the turns of the coil are slightly separated in order to permit the gas to flow perpendicularly across the tube during the passage through the wall of the coil.

Abstract: A heat pipe is disclosed which carries an evaporable working fluid and which includes a wick. More particularly, in accordance with the invention the wick comprises a first layer having a small-pore structure and disposed adjacent the vapor space within the pipe and a second layer having a large-pore structure and disposed adjacent the first layer.

Abstract: A method and apparatus for generating heating and cooling by circulating a working fluid within passageways carried by rotors, compressing said working fluid therewithin and removing heat from said working fluid in a heat removal heat exchanger and adding heat into said working fluid in a heat addition heat exchanger, all carried by said rotors. The working fluid is sealed within, and may be a suitable gas, such as nitrogen. A working fluid heat exchanger is also provided to exchange heat within rotor between two streams of said working fluid. In one arrangement, the unit uses two rotors, both rotating; in an alternate arrangement, one of the rotors may be held stationary. Applications include air conditioning service, and heating applications.

Abstract: A method and apparatus for the thermodynamic assisted compression of gases wherein a gas is alternately compressed and expanded with addition of heat regeneratively. The basic apparatus and method are applicable to a variety of uses such as gas compression, turbines and in heat temperature boosters. Working fluids may be either gases or vapors. Heat may also be removed during compression steps and added during expansion steps. Process can be used with both steady flow and non-flow apparatus.

Abstract: A control device regulating flow rate of a two-phase mixture of steam and water through a vent conduit in fluid communication with the exit from the fourth pass of a four-pass heat exchanger and a low pressure source. The heat exchanger conducts a first fluid vapor through the first and second tube side passes while condensing a portion of the first fluid vapor therein and separating the resulting mixture into condensate and vapor portions at the exit of the second pass. The separated first fluid vapor is then routed through the third and fourth passes where additional condensation of first fluid vapor takes place. A high ratio of first fluid vapor to first fluid condensate is maintained in all four passes to prevent tube failure due to cyclic tube temperatures resulting from alternate flooding and draining of the tubes' interior. The first fluid exiting from the fourth pass is a two-phase mixture of vapor and condensate which must both be vented to a lower pressure source.

Abstract: A deflector for heat exchanger tube is provided which enhances exchange of heat between the various portions of the liquid flowing in the tube. It comprises a tail piece offset laterally relatively to the body of said deflector which prevents it from being swept away by the liquid, said tail piece being adapted to come into abutment with the edge of the tube.

Abstract: A method and apparatus for the compression of compressible fluids wherein a fluid is first compressed within a constant volume with addition of heat, and then further compressed in a compressor means increasing the fluid pressure and temperature. After compression, the fluid is passed into a heat exchanger for heat removal, with the heat so removed usually being used as the heat being added into the fluid in the initial step. After passing through the heat exchanger, the fluid leaves the process. Various types equipment may be used, including vane, piston, screw or other positive displacement type apparatus. In an alternate arrangement, heat may also be removed during the compression in the compressor means. Also, work may be extracted from the fluid after leaving the heat exchanger heat removal.

Abstract: A primary fluid is circulated within vertical flexible tubes enclosed within a fluid-tight shell and a secondary fluid flows over the external tube walls. A secondary fluid admission chamber is formed in the top portion of the shell by a horizontal tube plate traversed by primary fluid distribution means. The upper end of each tube is fixed on a unit of revolution having a passage for the primary fluid and constituted by a sliding ring and two components. The first component has a frusto-conical external surface which cooperates with the internal wall of the ring. The second component has a cylindrical external surface provided with grooves which define passages for the downflow of secondary fluid with the internal wall of a tube-plate hole.

Abstract: A heating and air conditioning system and a special variable volume terminal box associated therewith, the system utilizing energy dissipated by the lighting and other building facilities in a controlled manner through the functioning of the variable volume terminal box.

Abstract: A gap self-compensating valving mechanism for an internal combustion engine, provided with a hydraulic pressure retaining mechanism arranged in place between a rocker shaft and a rocker arm. The hydraulic pressure containing mechanism includes lifters, a check valve and a return spring.

Abstract: An engine cooling system comprises a radiator through which a cooling air flow is induced by means of a fan. The cooling air flow is divided into a main stream and an auxiliary stream. Gases to be cooled, for example the exhaust gases of the engine, are mixed with the auxiliary air stream and are discharged via an outlet duct.

Abstract: Circuit for controlling the operability of one or more cylinders of a multicylinder internal combustion engine having electrically controllable means associated with it for preventing combustion from occurring in at least one cylinder of the engine. Preferably, the electrically controllable means for preventing combustion in a cylinder comprises a solenoid and associated mechanical means for preventing opening of the intake and exhaust valves for such cylinder to be thus disabled. Maintaining the intake and exhaust valves in a closed condition prevents the intake of an air-fuel mixture and permits compression and expansion, in a spring-like manner, of gases trapped within the combustion chamber.

Abstract: An apparatus for heating food items while retaining the moisture and nutritional aspects of the food wherein a food item to be warmed or heated is placed in a container having a removable lid or cover which is placed within an enclosure which is refrigerated and which includes means for heating the container. As the food is heated the container wall and cover are subjected to the cooling effect of the refrigeration system whereby any moisture driven off from the food item through heating of the food condenses on the surface of the cooled wall and lid of the refrigerated container to flow back to the food item being heated. Nutritional items are retained in the food item being heated by the presence of a moist atmosphere and its cooling effect above the food item.

Abstract: A chassis for an electronic apparatus having heat generating circuit components attached to heat exchangers along its top and bottom walls. Each heat exchanger includes a base from which parallel fingers project toward a plane passing horizontally through the center of the chassis, the various exchangers having fingers of differing lengths to define an air passage of varying effective cross-sectional area, thereby promoting air turbulence for increased cooling. The heat exchangers at the entrance to the air passage are aluminum, while those at the exit where the cooling air is warmest are copper.

Abstract: A plurality of parallel heat exchange tubes are grouped together and connected at the ends to form a bank. One or more banks are positioned so that one end lies in a supply air stream and the other end lies in an exhaust air stream. Each bank of tubes is sealed and contains a working fluid of the type having a liquid phase and a vapor phase. At one end of each tube, the working fluid absorbs heat from one of said air streams to effect vaporization of said fluid, the vaporized fluid flows to the cooler end of said tube where said vaporized fluid gives up heat to the cooler air stream and condenses in the tube. The condensed fluid then flows back to the warmer end by means of gravity.One end of the lowest tube in each bank includes a reservoir connected thereto which communicates with the normally cooler air path and includes a heating coil operatively associated therewith for providing a modulated control of the system responsive to the temperature of the enclosed space being ventilated.

Abstract: A heat exchange panel possessing a system of internal fluid passageways defining at least two longitdudinally extended headers extending substantially the length of the panel, a connecting header located at one end of the panel in a direction transverse to the longitudinally extended headers and interconnecting same, a plurality of connecting portions of said passageways extending transversely between the respective longitudinally extended headers, and fluid exit and entry portions extending longitudinally from at least two of said headers. The configuration of the headers serves to reduce pressure drop while maintaining uniformity of fluid flow under high velocity, and renders the panel eminently suitable for solar energy applications.

Abstract: A system is disclosed for preventing overheating of a carburetor of the type which is placed with an intake manifold above an exhaust manifold. A heat insulating plate is disposed substantially horizontally between the intake manifold and the carburetor. This plate extends to substantially cover the area above the exhaust manifold. A substantially vertical plate extends upwardly from the heat insulating plate at an edge thereof most distant from the engine. A path is thereby created for the convection currents from the exhaust manifold to bypass the carburetor.

Abstract: A valve control device for an overhead camshaft engine including a rotatable cam interconnected through a rocker to a valve mounted for reciprocal movement from an open to a closed position. The valve is normally biased toward the closed position and engages the rocker at one end, the other end of the rocker directly engaging the cam. A hydraulic brake is connected to the rocker at its other end and retards movement of the valve toward the closed position.

Abstract: A plurality of mutually parallel finned tubes forming a heat exchanger are positioned so closely together that the peripheries of mutually oppositely extending segments of the tube's respective fins are not substantially interspaced. To support the finned tubes, one or more groups of those segments are shortened to form transverse passages through which tube support members are passed transversely with respect to the tubes.

Abstract: A radiator for heating installations comprises an external container consisting of component elements, and a heat exchanger which goes through the entire assembly of elements forming the radiator acting as the tie-beam which holds the elements together. A second tie beam is positioned in the upper part of the elements to hold them together. The finned tube which constitutes the heat exchanger, is provided with an internal coaxial tube, of length slightly smaller than the external tube. The primary heating fluid returns through the internal tube so that the supply of the fluid is carried out from a single extremity of the apparatus. Since the walls of the radiator are not subjected to high pressure, the radiator may be manufactured of material of modest mechanical resistance, for instance plastic material.