Abstract: In a heating and/or cooling system, two heat transmitting media are blended into a blended medium with adjustable temperature. The motor (M) of a blending member is controlled pulsewise in both directions by comparison pulses from a setpoint/actual value temperature comparison.In order to provide a system which is simple to construct, which is wear-resistant and which permits a quick and accurate adjustment of the blending member, the circuit arrangement for controlling the motor (M) contains a first pulse generator (TB1), which generates pulses of constant width commencing respectively with the end of a comparison pulse and is connected to second and third pulse generators (TB2, TB3). The second and third pulse generators (TB2, TB3) generate pulses of a width proportional to the actual value or the setpoint of the temperature, respectively, which directly control the motor (M) after comparison in a comparator (CO).

Abstract: A stand-by heating/power supply system for an emergency vehicle, such as an ambulance, has an auxiliary electric heater and pump connected in the conventional heater coolant line adjacent the upstream side of the rear heat exchanger normally employed in such a vehicle. A control unit is connected to supply operating power to this heater and pump and also to operate the heater fan independently of the standard fan control provided in the vehicle. The control unit, in turn, is supplied with operating power upon connection with a conventional residential alternating current power source and includes timer circuits and electronic switches to delay the turning on of the heater pump unit and the fan and other auxiliary electrical power supplies for a predetermined time period after the connection with the alternating power source is made. The time delays for turning on different ones of the utilization devices within the vehicle also is varied, so that no sudden power surge takes place.

Abstract: A heating apparatus for a passenger compartment of a motor vehicle including a heater is provided with a bypass passage which bypasses an engine water jacket and an engine driven water pump, and a thermostat valve disposed between a feed passage from the engine water jacket and the heater so that the liquid from the engine water jacket is prevented from flowing into the heating circuit until the liquid temperature reaches to a predetermined level. A rapid warming up of the passenger compartment is enabled by forming a heating circuit with small water capacity through the bypass passage.

Abstract: A solenoid valve is arranged in a bypass passage of an engine cooling water circuit to selectively open and close the bypass passage. A temperature sensor is arranged in a vehicle cabin heating water circuit to monitor water temperature therein. A control unit is designed so that when the temperature sensor senses that the temperature of water in the vehicle cabin heating water circuit is below a predetermined level, the solenoid valve is closed, thereby increasing the flow rate of water in the vehicle cabin heating water circuit.

Abstract: An apparatus for controlling the air conditioning of a vehicle in accordance with the operational condition of said vehicle, the state of air conditioning of the passenger compartment of said vehicle and the relationships among the passenger compartment temperature, the atmospheric temperature and a command value of the passenger compartment temperature.

Abstract: A rapid-response water heating and delivery system for quickly and accurately heating water to a selected set point temperature within a predetermined temperature range, and for maintaining the selected set point temperature of the water for a wide range of volumetric flow rates and for a wide range of initial water temperatures. The heating and delivery system includes a water vessel containing electrical heating elements for heating the water flowing through the vessel and a control unit automatically operable to control the supply of electrical energy to the electrical heating elements, taking into account the actual temperature of the water being discharged from the vessel, the selected set point temperature called for, and the rate at which the actual temperature of the water being discharged from the vessel changes with respect to the selected set point temperature so that the temperature of the water flowing through the vessel quickly approaches the selected set point temperature.

Abstract: A digital indicating installation for vehicles which selectively reproduces several function values within an indicating field; by actuating one of several switches, the reproduction of a first function value is interrupted for a predetermined time and a further function value coordinated to the switch is reproduced in the meantime within the indicating field.

Abstract: A heating system which uses bleed air to heat and recirculate cabin air for the passenger space of a vehicle.

Abstract: A heat exchanger for a multiple fluid medium solar energy system comprising a plurality of elongated strips of heat conducting material secured together to define a plurality of elongated passageways of uniform cross-section extending parallel to one another in the direction of elongation of said strips and wound spirally in a coil formation in a direction such that the passageways extend along side-by-side spiral paths. Sealing material spacers are provided between portions of the spirally wound strips defining adjacent volutes at two annularly spaced positions with respect to each spiral path through which first and second bores extend in generally radial direction of a number equal to the number of spiral paths.

Abstract: A multiple fluid medium energy conversion system for a building which includes a radiant energy panel assembly connectable alternatively with a closed Brayton cycle closed air circuit or an open environmental air circuit, the open environmental air circuit including a clothes dryer selectively mounted therein, a temperature water storage closed circulating system for storing the temperature energy, a room air temperature conditioning circuit and a potable hot water circuit, the potable hot water circuit including an improved potable hot water storage tank assembly, all of the circuits being interrelated by heat exchangers and a control circuit for the system.

Abstract: An automatic system for controlling the environmental conditions in a building divided into a plurality of zones includes a control station that sends control signals over the power lines of the building to control power consuming appliances in the various zones. The control station includes a programmable computer that is operably coupled to various displays and control switches on a control panel. In one mode of operation the switches and displays are utilized to program a schedule into the computer for controlling the various power consuming appliances such as heating and airconditioning units, lights, machinery and the like in order to provide a desired environment within the various zones of the building.

Abstract: In a batten-seam roof construction employing at least one photovoltaic cell module, the electrical conduits employed with the at least one photovoltaic cell module are disposed primarily under the battens of the roof.

Abstract: A fully automatic regulating equipment for a heating device having an oil vaporizing burner, for instance for a central heating furnace, comprises a thermostat responsive to the output hot water temperature or to the room temperature and having a contact which is arranged in series with an electronic time delay relay by which an ignition member activated by a surface thermostat, the bi-metallic heating winding of an oil control regulator and the excitation winding of a solenoid operated valve arranged in the pipeline leading to the burner can be switched to the main voltage. The equipment further comprises a thermo-relay arranged in series with the contact of the time delay relay and parallel to the excitation winding of the ignition member. The thermo relay is operated to switch the bi-metallic heating winding of the oil control regulator and the excitation winding of the solenoid operated valve with time delay with respect to the winding of the ignition member, to the main voltage.

Abstract: A transparent thermal insulating system having controllable transmissivity to visible radiation comprising a first layer generally transparent to visible radiation, a second layer generally transparent to visible radiation and spaced from the first layer; partition means for separating the space between the layers into compartments; a thermal radiation suppression device for suppressing thermal radiation transmission; and a variable transparency thermal control device for controlling transmission of visible radiation as a function of temperature.