Abstract: A novel control circuit for heating and heating/cooling systems wherein in a heating mode the circuit controls a valve means comprising a main valve and a modulating valve through which gas is supplied to a burner. The main valve is a normally closed, solenoid-actuated type which opens when its coil is energized, and energization of its solenoid is controlled by a pair of normally open relay contacts connected in series. One of the contacts closes when the temperature in the space being heated drops below a preset temperature. The other contact remains closed so long as the temperature in the space being heated remains below a maximum limit. In a heating/cooling system the circuit is selectively operatively coupled with the valve means and a refrigeration unit. When heating is selected, the circuit operates as mentioned above. In cooling, a cooling solenoid of the refrigeration unit is energized when the temperature in the space being cooled rises above a preset temperature.

Abstract: A reciprocable piston internal combustion engine, especially diesel engine, with an air guiding passage leading to a combustion chamber for combustion air to be conveyed by the air feeding passage. The air feeding passage is provided with twist-forming elements. Also means are provided for controlling air injection and are actuated dependent upon load or smoke with the opening cross section of the air feeding passage being variable within predetermined limits. The oxygen supply is kept low during the combustion of the air with the fuel in the center of the combustion chamber during all load ranges of the internal combustion engine. Combustion air which is rich in oxygen and stays close to the wall of the combustion chamber is affected by the radially progressing combustion only when the temperature in the combustion chamber or cylinder starts dropping in view of the expansion of the air-fuel mixture.

Abstract: An apparatus for the detoxification of exhaust gases of an internal combustion engine having a fuel metering mechanism, such as a carburetor, which meters out fuel corresponding to the air quantity, is described. An air quantity measuring device is provided which controls the metering mechanism so as to achieve a slightly enriched fuel-air mixture. Thus, the air number (.lambda.) is initially maintained at less than 1, the air number 1 designating a stoichiometric fuel-air mixture. Secondary air is admitted via a secondary air pump, an oxygen sensor being disposed on the exhaust side, until such time an optimum of fuel-air mixture is reached. The secondary air is admitted into the suction tube of the internal combustion engine downstream of the air measuring device.

Abstract: A flow control valve for an exhaust gas purifying system which is divided into a first valve chamber into which the exhaust gases flow and a second valve chamber out of which the exhaust gases flow. A first valve means responsive to the exhaust gases controls the communication between the first and second valve chambers and a second valve means controls the operation of the first valve means in response to the negative pressure in an air intake system.

Abstract: A system for use in multiple occupancy buildings wherein energy consumption for comfort heating or cooling is centrally metered to provide an indication of relative amounts of energy used by the individual occupancy units. An electrically operated elapsed time meter is associated with each occupancy unit having its own individual temperature control unit. The meter is actuated to record the time for which the temperature control unit is operating to consume energy for room heating or cooling purposes.

Abstract: A ventilating unit has separate passages connecting internal and external environments, and a reversible heat pump with evaporator in one passage and condenser in the other passage. Separate reversible axial flow fans are located in the two passages. Two ventilating modes are provided, in each of which the fans are moving air in opposite directions through the passages. When the internal environment is relatively warm, the incoming air passes over the evaporator and the outgoing air over the condenser, and vice versa when the internal environment is relatively cool. Special fan design facilitates direction reversal, and also variable speed operation. The unit also has an additional inlet with a heater, and control means are adapted to provide a recirculation mode in which the recirculated air is heated thereby.

Abstract: A carburetor has a choke control device that acts in connection with a thermoplastic control to permit the carburetor choke valve to be closed during starting but provides a controlled gradual opening of the choke valve after starting. The device includes a self-cleaning purge feature for continual cleaning of the device. A simple one way choke valve device and precision by-pass give exact control of the choke opening. A back pressure valve is provided to prevent back fire damage to the unit.

Abstract: An evacuated dual pane window structure is provided for reducing heat loss through the window structure. The window structure comprises a pair of closely spaced panes of glass having a spacing of less than 0.25 inch with a spacer means positioned between and uniformly spaced in the area between the panes, and sealing means such as an O-ring positioned around the perimeter and between the panes of glass. A vacuum pump may be provided for evacuating the area between the panes of glass for reducing thermal losses through the window structure. Reflective coatings may be provided on the inside surfaces of the glass. A plurality of windows of the above structure may be connected by manifold piping to a single vacuum pump which is actuated by a thermostat when a preset temperature differential exists between the outside and the inside of the building where the windows are used.

Abstract: In a rotary valve controlling the inlet of fuel to, and exhaust of combustion products from, a combustion chamber, an improved seal is achieved by providing rigid upstanding lips in the valve housing about the opening of the housing into the combustion chamber, the lips sloping away from the combustion chamber opening and the housing being split diametrically for movement about a hinge pin to provide flexibility to the system and prevent clamping on the valve.

Abstract: A built-in combination cooling and heating device for a residential building comprising peripheral wall members, a floor member and a ceiling member which are high thermally conductive and define a room of said residential building, an outer jacket surrounding said room defining members in a peripherally spaced relationship to the members to define an annular air space therebetween and having a hole in the center of the funnel-shaped lower end portion and the conical upper end portion provided with exhaust ports, a heater disposed in said center hole of the outer jacket lower end portion, a tunnel provided below said floor in communication with said center hole, a porous heat radiation plate suspended from said floor member right above said heater, a cooler suspended from the center of said upper end portion of the outer jacket, a porous cooling air dispersion plate suspended from said upper end portion of the outer jacket and a ventilator provided in the attic defined between the roof of said building and up

Abstract: In an internal combustion engine in which fuel in a fuel tank is sent to the carburetor to be sucked into the engine, a fuel separating system for starting an internal combustion engine comprising means for heating the fuel fed out of the fuel tank and means for cooling a vaporized low-boiling point fuel to condense so that a low-boiling fuel is fractionated out of the fuel in the fuel tank and the engine is started by the thus extracted low-boiling point fuel.

Abstract: An automatic control system for regulating the temperature of the passenger compartment in an automotive vehicle is simplified and improved by the use of a power servomotor having a vacuum motor, an electrical programmer, and a diverter valve as component parts thereof. The servomotor controls the position of a plenum mounted air blend door regulating the passage of cold, tempered, or heated air into the passenger compartment. The servomotor also controls the position of the electrical programmer which in turn controls desired blower speeds and certain other system functions. The servomotor further controls the position of the linear diverter valve which ports vacuum in accordance with predetermined conditions to other vacuum actuated motors employed in the system.

Abstract: An auxiliary air intake passageway provided with a fuel jet opens into the main barrel between the main throttle and the intake manifold. A valve permits auxiliary air-fuel mixture to flow into the main barrel through the air intake passageway when the vacuum in the intake manifold exceeds a certain value during deceleration of the vehicle. The auxiliary mixture supply prevents excessive reduction of the exhaust gas temperature and resulting emission of unburned pollutants.

Abstract: Rooms of a building are provided with an air distributing ceiling and plenum chambers thereabove. Treated air is pumped to the plenum chambers where it passes through the ventilating ceiling to heat or cool an enclosed area below. A recirculation system permits withdrawal of all of the treated air from the enclosed area. The withdrawn air is recirculated after mixing with freshly treated air. The air is treated by passing a portion thereof over a heating or cooling coil while the remainder bypasses the coil. The mixture of treated and bypass air is pumped at a high rate into the plenum chambers where a static pressure such as 1 inch of water exists.

Abstract: A plurality of structural unit bodies are utilized to construct by suitably assembling the unit bodies. Each structural unit body comprises an outer flange and an inner flange extending from one end edge and the other end edge respectively of a box-shaped frame. A stuffed box is secured to the surface of the inner flange and the stuffed box is in the form of a flat box made of a dampproof material. The stuffed box is covered on the outside with a metal net-like material and has disposed therein a pipe capable of passing fluid therethrough. The box is stuffed with noncombustible materials. The upper portion of the middle section of the frame, the inside flange surface and the entire surface of the stuffed box is plastered or covered with mortar whereby there is formed a circumferential groove between the outer flange and the underside of the mortar.

Abstract: A Diesel engine comprises a set of starting cylinders and a set of power cylinders; and an injection pump including two sets of plunger pistons, one said set of plunger pistons being associated with the starting cylinders for supplying fuel to the starting cylinders and the other set of plunger pistons being associated with the power cylinders for supplying fuel to the power cylinders. Emission of unburned hydrocarbons and nitrogen oxides is reduced as compared with conventional Diesel engines.

Abstract: A conductivity probe unit comprising a chamber with a restricted entrance and an internal button electrode, the chamber being located in the header tank of a radiator.

Abstract: A refrigeration system is disclosed which utilizes the rejected heat from the condenser of an air conditioner to heat a second medium such as water for a swimming pool. A control is provided to maintain the temperature of the pool within a given range without degrading the performance of the air conditioning system and actually improving its economy and efficiency of operation. A heat exchanger, to place the second medium in heat exchange relationship with the refrigerant, is placed between the condenser unit and the expansion valve of the refrigeration system. The temperature of the refrigerant entering the heat exchanger is controlled by the on and off cycling of a fan to selectively move air across the coils of the condenser responsive to the temperature of the second medium.

Abstract: A tank for oil or other hydraulic fluid is improved both for cooling the fluid during normal operation and for heating it up preliminarily at start-up time by an internal curtain spaced a narrow distance from the side walls and providing a cooling channel through which, during operation, the oil may be passed in immediate contact with the outer side walls of the tank to be cooled before flowing into the main storage chamber, a flap valve being turned at start-up time to a position to direct returning oil directly into the main storage chamber where it is relatively insulated from the outer side walls by the stagnant oil in the cooling channel, so that the heat developed by power-circulation of the oil is conserved and in cold weather the oil is more quickly brought up to satisfactory operating temperature. The peripheral cooling channel normally used also settles foreign particles from the hydraulic fluid, and dissipates any entrained air at its surface.

Abstract: This invention teaches a combination refrigerator-thawer cabinet that can be used as a conventional refrigerator or as a thawer for quick thawing frozen food without allowing the temperature of the food to exceed a predetermined guideline temperature, such as 45.degree.F. The disclosed unit is similar to a standard refrigerator having a cabinet for holding the food, but further has an auxiliary air circulating plenum located within the cabinet. Heating means are located within the plenum, and plenum fans draw the cabinet air into the plenum to be heated by the heating means and subsequently to be discharged back into the cabinet. The plenum air flow arrangement provides that the plenum outlets are adjacent the top and bottom cabinet walls and the plenum inlets are near the middle of the cabinet, and this minimizes the formation of hot spots where heated thawing air is blasted directly against the food.