Abstract: An air-filter assembly having a filter cap and a filter case, both being made of elastic material such as synthetic rubber and which are formed integrally with each other. The air filter assembly is provided at an air inlet pipe portion of a valve for use in an exhaust gas emission cleaning system.

Abstract: A differential pressure switch device having a flexible diaphragm between two chambers subject to differential pressure, a permanent magnet movable with the diaphragm against a biasing force when pressure differences occur in the chambers, a thermo ferrite combined with the magnet for cooperation therewith, and a reed switch assembly actuated by the movement of the magnet and through the action of the thermo ferrite which becomes magnetic or non-magnetic depending on the temperature.

Abstract: An electromagnetic control valve is provided with a housing having an inlet and two outlets extending through the wall of the housing. A valve member is mounted in spaced relation from each outlet opening on a resilient member for movement into and out of engagement with a valve seat surrounding the outlet opening. An elongated valve actuator is pivoted at its mid-point between the two valve members and is provided with a projection adjacent each end disposed in contact with a respective valve member. A spring normally biases the valve actuator about its pivot point to bias one of the valve members into engagement with its associated valve seat. An electromagnet is located on the opposite side of the valve actuator from said one of said valve members to pivot the valve actuator against the force of the spring.

Abstract: A vacuum servomotor comprises a cup-shaped casing having a bottom wall provided thereon with a vacuum nozzle for connection to a source of vacuum and an air nozzle in communication with the atmosphere, the casing being integrally formed with a cylindrical support structure extending inwardly from the bottom wall and surrounding the air and vacuum nozzles. The servomotor further comprises a support plate secured to an inner end of the support structure, and an electromechanically operated solenoid valve assembly mounted on the support plate within the support structure to normally open and close the air and vacuum nozzles, the valve assembly closing and opening the air and vacuum nozzles in response to an output signal from an electric control circuit.

Abstract: Automobile speed control to maintain actual automobile speed at a desired automobile speed, in which a superposed electrical analog signal formed by a first electrical signal indicating actual automobile speed and a feedback signal indicating fuel injection duration in an engine of an automobile is supplied to a comparator which compares it with a second electrical signal indicating desired automobile speed and memorized on a capacitor. The differential signal or error signal at the output of the comparator circuit is supplied to a servomotor which controls the position or opening of a throttle valve of the engine. The feedback signal is supplied from an injection time signal generator circuit which, in response to a fuel injection command signal from an electronic fuel injection control device associated with the engine, generates an electrical analog signal corresponding to fuel injection duration.

Abstract: Automobile speed control system to maintain actual automobile speed at a desired automobile speed, in which a first electrical signal indicating actual automobile speed is compared with a second electrical signal indicating desired automobile speed in a comparator circuit to obtain an error signal indicating the difference between actual and desired automobile speeds. The error signal is supplied to throttle valve control means to shift a throttle valve into a position at which actual automobile speed equals the desired automobile speed. A superposed signal, consisting of the first electric signal and a negative feedback signal substantially indicating throttle valve position, is applied to a memory capacitor which provides the second electrical signal. Rememorization of the capacitor is controlled by a set switch through a memorization control circuit. The desired automobile speed level to be memorized on the capacitor is controlled by closure duration and closure repetition of the set switch.

Abstract: A solenoid-operated fluid control valve has an armature assembly which includes a reciprocally movable platelike magnetic valve member and a seal element loosely retained by the valve member and projecting therefrom. A magnetic core defines a fluid passageway and has a valve seating surface at its one end. The valve seating surface of the magnetic core opens in a valve chamber which surrounds the side surface of the magnetic valve member to guide its movement toward and away from the valve seating surface and to maintain the seal element in alignment with the valve seating surface. The seal element has opposed conical or spherical ends and an annular recess therebetween. The seal element loosely engages with and retained by an opening of the magnetic valve member to abut concentric with the valve seating surface of the magnetic core in spite of a slight eccentricity of the assembly within the valve chamber.

Abstract: An irrigation system for human body such as anus and private part. The system comprises a heated water containing tank, a pair of heated water ejection units of an injection nozzle type for scouring or irrigating of anus and private part of female, and a heated air drying apparatus for drying anus and private part. A first temperature sensor is disposed in the tank for controlling intermittently a control circuit associated with a water heating unit in the tank so as to stabilize the temperature of the heated water in the tank. A second temperature sensor is disposed in the tank for deenergizing the water heating unit in the event the temperature in the tank rises up to a predetermined higher level. A pump motor unit and a water passage for mixing and agitating the tank water to avoid non-uniform temperature distribution are associated with the tank.

Abstract: In a pressure control device for applying modulated pressure to a servo chamber of a vacuum servomotor in response to an output signal from an electric control circuit, the control device includes a modulator valve for modulating pressure in the servo chamber, a solenoid winding to be energized by the output signal from the electric control circuit, a pole of magnetic material disposed within the winding, a spring loaded armature of magnetic material positioned to face the pole and operatively connected to the modulator valve, and a shock absorber mounted on the pole to receive the armature thereon upon energization of the winding.

Abstract: Automobile speed control system to maintain actual automobile speed to desired automobile speed, in which a first electrical signal indicating the actual automobile speed is compared with a second electrical signal indicating the desired automobile speed with a comparator circuit to obtain an error signal indicating speed difference between the actual and desired automobile speeds. The error signal is supplied to throttle valve control means to shift the throttle valve into a position at which the actual automobile speed equals to the desired automobile speed. The error signal, through an electrical first order lag circuit, is fed back to the comparator circuit to stabilize speed control operation of the system, whereby the prior art feedback potentiometer, in prior arts linked to the throttle valve to supply negative feedback signal to the comparator circuit is eliminated.

Abstract: In a control system for electrically controlling rotation speed of an engine having a throttle valve and a fuel injection control apparatus to control fuel injection timing and duration in accordance with opening angle of the throttle valve, the control system comprises an integration circuit for integrating an output signal of the fuel injection control apparatus to generate an integrated signal indicative of the fuel injection timing and duration, a setting circuit for setting an instant value of the integrated signal as a command signal indicative of a desired set speed, a comparator coupled with the integration circuit and the setting circuit for comparing the integrated signal with the command signal to produce an output signal therefrom, and a servomotor for controlling the opening angle of the throttle valve in response to the output signal from the comparator to operate the engine at the desired set speed.

Abstract: A desired automobile speed signal memory circuit for an automobile speed control system to maintain actual automobile speed constant at a desired speed. The memory circuit memorizes an actual automobile speed signal at the moment a desired speed set switch is closed. This memorized automobile speed signal is then used as a reference signal by the automobile speed control system to keep the actual automobile speed constant. The memory circuit has a capacitor which memorizes the desired speed signal, a first FET which forms a memorization loop with the capacitor upon the closure of the desired speed set switch, and a second FET which supplies the memorized desired speed signal on the capacitor in an impedance conversion mode as the reference signal used by the automobile speed control system to maintain constant the speed of the automobile.

Abstract: In an electromagnetically operated valve unit, a moving-coil linear motor is associated with a flow regulating valve to linearly control the quantity of fluid flow in proportion to an input current applied thereto.

Abstract: The idle speed of an engine is controlled in response to a control signal derived from the voltage across a thermistor responsive to the temperature of the engine cooling water. The thermistor voltage level varies exponentially with temperature changes. An engine idle speed control signal generator circuit includes a network of resistors, diodes and a transistor which produces an output control signal whose maximum level is limited to a value corresponding to a desired maximum idle speed, and whose minimum level is maintained above a value corresponding to the minimum desired idling speed. The circuit also adjusts the level of the output control signal to compensate for varying engine loads and faults in the circuit.

Abstract: An automobile speed control for maintaining actual road speed at a preselected driving speed. To control throttle position so as to maintain the actual road speed at the preselected speed, a first error signal is obtained from a comparator. The first error signal is, for the purpose of stabilizing the actual road speed, compared with a negative feedback signal to generate the final throttle position control signal. The negative feedback signal is obtained from an intake air flow rate detector to prevent increasing the force required for operating the throttle valve control mechanism and to facilitate installation of the speed control system.

Abstract: An electrothermally operated valve which comprises a housing provided thereon with first and second ports and with a hermetic chamber in communication with the respective ports, a bimetallic element having a stationary end secured to an inner wall of the housing and a movable end, a cut-off valve including a valve body fixed on the movable end of the bimetallic element to co-operate with one of the first and second ports, and a heating coil coupled with the bimetallic element and adapted to be connected with a source of electricity. When the bimetallic element is heated upon energization of the heating coil, deflection of the bimetallic element is assisted by snap action to open the cut-off valve so as to communicate the first and second ports to each other through the hermetic chamber.

Abstract: An electrically operated switching valve comprising a valve housing provided with a pair of opposed valve ports, a valve member disposed between the valve ports for co-operation therewith and a snap-action valve actuating device for actuating said valve member alternately into engagement with the valve ports. The valve actuating device includes a rectangular plate which is bent in one direction along the longitudinal center line and a strap member extending between diagonally opposite corners of the plate and secured thereto. The strap member has a length which is smaller than the diagonal dimension of the plate so that the plate is deflected under tension applied by the strap member in the opposite direction along the transverse center line of the plate. The strap member is associated with an electric heating wire so that it is heated when the wire is energized.

Abstract: A pressure differential switch device having a flexible diaphragm between two chambers subject to differential pressures and a permanent magnet movable with the diaphragm against a biasing force when pressure differences occur in the chambers; the magnet moving to a position in which the magnetic field of the magnet actuates the contacts of a reed switch assembly.

Abstract: In a governor switch apparatus including a governor mechanism to be driven at various speeds of a rotary element and a switching mechanism to be actuated by the governor mechanism, the switching mechanism comprises a seesaw lever to be actuated at its central portion by the governor mechanism, a first switching device engageable with a first end of the lever and provided with a first normally open switch, a second switching device engageable with a second end of the lever to be assembled symmetrically with the first switching device and provided with a second normally open switch, and a stopper for blocking the movement of the first end of the lever after closure of the first switch. The first switch is closed prior to the second switch due to a difference between the resilient forces given to the first and second switching devices respectively.