Abstract: A butterfly water valve for a heater core has a vacuum motor attached to the water valve body with the vacuum motor connected to the butterfly valve crank. The vacuum motor housing has a well formed therein and a solenoid operated valve is quick connected in the well and is ported directly to the vacuum motor pressure chamber. The solenoid valve well communicates with a vacuum connector formed integrally with the vacuum motor housing. The vacuum motor housing is preferably formed of two shells welded together and sealing about the rim of a pressure responsive diaphragm.

Abstract: A system for controlling vehicle passenger compartment comfort. An electronic controller receives input from: (i) a thermistor array sensing blower plenum discharge temperature, (ii) a user movable Level Select Control (iii) a potentiometer sensing the position of a servo driven heater core water valve, (iv) an engine rpm tachometer generator and (v) a blower speed signal. The controller drives the servomotor for the water valve at a "High" rate until the valve position potentiometer indicates that the valve is within fifteen degrees (15.degree.) of the target, whereupon the controller drives the servomotor at a "Low" speed.

Abstract: An automatic control system for regulating the temperature of blower air discharged over a heater core to a vehicle passenger compartment. A thermistor is disposed to sense discharge air adjacent the heater core and provide a temperature signal. An electrical indication is provided of the condition of a servomotor driven valve controlling water flow to the heater core. An electrical reference signal is provided indicative of a user selected relative change of flow discharge air temperature. A signal is provided indicating the speed of the water pump circulating liquid to the heater core. The signals are summed and the valve sums driven until the sum is zero and the valve modulated to maintain the sum at zero for regulating blower air discharge temperature constant.

Abstract: A temperature control system for a passenger van having individual temperature selection controls for passengers in the forward and rear sections of the passenger compartment. Separate exothermic heat exchangers for circulation of engine coolant therethrough are provided for the forward and rear passengers. Each heat exchanger is supplied by a coolant control valve and individual blowers provide a stream of forced air over the heat exchangers. A thermistor senses the temperature of the air discharge over each heat exchanger and a controller sums the sensed temperature signal with a user selected relative temperature reference signal provided independently by the forward and/or rear passenger selector inputs and a valve position signal; and, the controller generates a control signal proportional to the summation.

Abstract: A feedback potentiometer type servoactuator having a plastic housing shell with small high RPM low voltage motor and non-metallic gear reduction train for driving an output shaft. The shell and cover plate provide structural support for gear journalling and the cover plate has an electrically resistive plastic strip baked onto the inside of the cover. Contacts mounted on the output gear for movement therewith wipe the resistive strip to provide variable resistance for an output shaft position feedback signal. The motor pinion and first stage reduction gears are made of urethane thermoplastic elastomer, the second stage gears of acetal plastic and the final gears are formed of 30% glass fiber filled polyester plastic for providing quiet running and long gear life.

Abstract: A slide-type electrical switching mechanism has a contact plate with plural U-shaped contact portions interconnected by a plurality of frangible portions. The plate is secured to the non-conductive switch housing by deforming portions of the housing over the contact plate. An elongated stationary contact strip is secured to the housing adjacent the contact plate. The frangible portions are punched out to form a plurality of discrete U-shaped contacts for switching purposes. A movable contact assembly continuously engages the contact strip and makes and breaks a circuit between the contact strip and one of the leg portions of each U-shaped contact.

Abstract: The dual sealing fluid connector connects and seals pneumatic control or other fluid conveying lines with a pneumatic or other fluid control device. The connector further provides a seal with a panel through which it extends to isolate the regions on either side of the panel from each other. The connector has a resilient body which extends through an aperture in the panel. The resilient body has a peripherally extending sealing projection for engaging one side of the panel around the aperture to prevent the environments on either side of the panel from intermixing through the aperture. The resilient body further has a pair of axial bores which are connected at one end with the pneumatic control lines and at their other end with the pneumatic control device. A panel mounting clip has engaging portions which project outward from the resilient body for engaging the second side of the panel to lock the panel between the sealing projection and the engaging portions.

Abstract: A vacuum regulator valve (10) is disclosed comprising a force-balance modulator valve subassembly (114, 118, 119, 122, 124, 126) mounted to a housing (12, 30) having inlet (14) and outlet (16) fluid ports. A vent insert (114) is adjustably biased through a biasing spring (166) by a rotary cam arrangement which includes a spring (64) biased rotary input member (48) rotatably mounted on a housing tubular projection (40). A ring-shaped drive member (144) is rotatable with input member (48) and supports a cup-shaped cam member (154). As projections (152) on the reaction member (144) rotate relative to cam surfaces (160), the cam follower is moved linealy relative to the vent insert. Locking tabs (50, 146, 148, 150) and alignment grooves (46, 80, 96, 98) enable the cam arrangement to be assembled in a predetermined angular position and locked to the housing without fasteners. An externally accessible adjustment member (162) enables valve calibration after final assembly.