Abstract: A positive type photoresist composition comprising at least one alkali-soluble resin, at least one quinone diazide compound and a compound of the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 represents alkyl groups having 1 to 8 carbon atoms or a cycloalkyl group having 1 to 8 carbon atoms, R.sub.3 represents hydrogen, an alkyl group having 1 to 4 carbon atoms or halogen, R.sub.4 represents hydrogen or a cyano group and R.sub.5 represents a cyano group or a carboxyl group.

Abstract: A constant-speed running controller for maintaining the running speed of a vehicle at a fixed level by regulating the degree of opening of the throttle valve of the vehicle.

Abstract: A vehicle speed control system for a motor vehicle having an automatic transmission control system includes first reference data for exclusive use with only automatic transmission control and second reference data for exclusive use with both automatic transmission control and vehicle speed control. The second reference data is for decreasing the chance of a gear ratio change by comparison with the first reference data.

Abstract: A lockup clutch in a torque converter is connected by a lockup solenoid energized in response to a lockup signal generated by a lockup discrimination circuit. When a speed sensor detects a rate of deceleration higher than a predetermined level at the time the vehicle is abruptly braked, for example, a lockup control circuit overrides the lockup discrimination circuit to cut off the lockup signal for thereby de-energizing the lockup solenoid, whereupon the lockup clutch is disconnected.

Abstract: In such an operation mode that the vehicle is accelerated upon turning-on of the switch and, when the vehicle has reached a given vehicle speed, the switch is turned off to memorize the vehicle speed at that time for effecting constant-speed control at the memorized vehicle speed, a throttle valve is returned to apply the engine brake after turning-off of the switch. If at least one of several given conditions is satisfied, adjustment of opening degree of the throttle valve is started so as to maintain the current vehicle speed at the goal vehicle speed. This makes smaller overshoot of the controlled vehicle speed caused by a response deley of the vehicle. The given condition may be related to differences between current speed and set speed, elapsed time, elapsed distance, or degree of acceleration.

Abstract: When the device is not in use, supply of power to a computer CPU for controlling the device is automatically interrupted, thus prolonging the service life of the CPU and eliminating useless power consumption. The need of manual operation of a power-on switch can be dispensed with. When at least one of a set switch and a resume switch is actuated, supply of power to the CPU is automatically turned ON using a flip-flop circuit. If the vehicle speed is memorized during an ON state, the CPU is still held in an ON state. But if the vehicle speed is cleared, the CPU controls the flip-flop to set OFF supply of power. In case the vehicle speed is less than a given value, the memorized vehicle speed is cleared irrespective of the state of the set switch and the resume switch.

Abstract: An actuator for controlling the pressure in an internal space defined by a spring-biased diaphragm and a housing by solenoid valve. The internal space is selectively communicated with a negative pressure port or an atmospheric pressure port through a first solenoid valve. The pressure in the internal space is determined by the ratio of a time period in which it is communicated with the negative pressure port to a time period in which it is communicated with the atmospheric pressure port, and the position of the diaphragm is determined accordingly. Another solenoid valve for releasing negative pressure is included for safety. To the housing fixed are a microcomputer for receiving status signals from a vehicle speed sensor, clutch ON/OFF sensor, brake ON/OFF sensor, etc. to generate a solenoid valve opening and closing signal, and a printed board incorporating an electrical driver adapted to energize the solenoid valve in response to said signal.

Abstract: An automobile speed control system has a comparator circuit for issuing a speed difference signal when there is a difference between an automobile speed signal indicative of an automobile speed and an automobile speed setting signal indicative of a desired speed setting, an actuator responsive to the speed difference signal for adjusting the opening of a throttle valve to change the speed of an automobile in order to eliminate the speed difference signal, a cancel switch for cancelling a constant-speed travel mode of the automobile, a resume switch for resuming the constant-speed travel mode which has been cancelled, a timer circuit energizable for a prescribed interval of time in response to operation of the resume switch while the automobile is running in the constant-speed travel mode, and an acceleration signal generator circuit for generating an acceleration signal in response to operation of the resume switch while the timer circuit is in operation, whereby the acceleration signal can be produced to inc

Abstract: An automobile speed control system which is capable of running at a speed which is the same as the desired memorized speed and which will be maintained constant even during momentary voltage interruptions in the system, is comprised of a discharge device such as a diode which is arranged between one end of a grounded capacitor in an integrating circuit and a line which supplies a voltage higher than that of said one end of the capacitor when a voltage power source is normal. When the voltage of the voltage power source drops, the terminal voltage of the capacitor decreases slowly and the electric charge of the capacitor is discharged. When the voltage of the voltage power source rises again, the circuit operates in the same manner as the operation thereof when the power switch is closed and the memorized automobile speed is not changed from the prior memorized speed.

Abstract: An automobile speed control system for use with an automobile includes a throttle valve, actuator means operatively connected to the throttle valve for actuating the throttle valve, a plurality of switch means, detector means for detecting a speed of the automobile, a plurality of automobile speed memories, and electronic control means for storing values dependent on output signals issued from the detector means into the automobile speed memories, respectively, in response to operation of the switch means, for reading the values, one at a time, from the automobile speed memories in response to operation of the switch means, and for energizing the actuator means according to the read values.

Abstract: A speed range control system setting an automatic transmission at a proper speed range in accordance with throttle opening and vehicle traveling speed. The system detects a sudden fall in the level of a vehicle speed signal under the anomalous conditions such as disconnection of a vehicle speed signal line or slippage of wheels due to emergency braking, and then sets the automatic transmission at a safety speed range. After setting at the safety speed range, the speed range of the automatic transmission is set in accordance with the throttle opening and vehicle traveling speed after counting a predetermined number of vehicle speed signal pulses generated in conjunction with rotation of a drive shaft.

Abstract: An electromagnetic linear control valve including a housing having inlet and outlet ports, a valve mechanism disposed within the housing for controlling the quantity of fluid flow from the inlet port to the outlet port, an electric control circuit and a linear motor associated with the valve mechanism for operating the valve mechanism in response to an input current from the electric control circuit wherein the valve mechanism includes a valve seat member positioned between the inlet and outlet ports and having an elongated opening formed therein to permit flow of fluid therethrough and a valve member cooperating with the valve seat member to control the opening area of the valve seat member and wherein the linear motor includes a bobbin, a solenoid wound on the bobbin and connected to the electric control circuit, a yoke member of magnetic material extending into an inner peripheral portion of the bobbin and supported on the bobbin, a core of magnetic material movably mounted on the yoke member along the axi

Abstract: In combination with a flow control valve assembly, an electromagnetic motor assembly includes a stationary core surrounded by a solenoid coil at its small diameter portion, a yoke member coaxially spaced from the stationary core and having an axial hole coaxial with the small diameter portion of the stationary core, and a movable core arranged between the stationary core and the yoke member. The stationary core is formed at its inner end with an annular recess, and the movable core is at its inner end with an annular projection to be coupled within the recess with a predetermined clearance.

Abstract: A safety circuit in an automatic transmission control system having a comparator producing a transmission shifting control signal wherein upon comparing a vehicular velocity responsive signal and a throttle opening responsive signal, the safety circuit comprises:a comparator whose inverting input terminal is supplied with the vehicular velocity responsive signal through a capacitor and whose non-inverting input terminal is supplied with a constant voltage signal which is lower than the inverting terminal signal at normal state, the comparator detecting the difference between the two input voltages;a transistor circuit for connecting to ground said transmission shifting control signal; anda latching circuit for latching the output signal of the transistor circuit,whereby an abrupt loss of the vehicluar velocity responsive signal is detected.

Abstract: An electromagnetic valve assembly including a housing, a movable core axially, movably disposed in the housing, an electromagnetic coil positioned adjacent the movable core actuatable to move the movable core from a first position to a second position upon energization of the electromagnetic coil, a shaft coaxial with the movable core and axially movable together with the movable core, a valve mechanism including a valve member axially movably mounted on the shaft, a first and second valve seat disposed in the housing, the valve member being seated on the first valve seat when the movable core is in the first position and being seated on the second valve seat when the movable core is in the second position, a first spring member for continuously biasing the shaft and movable core to the first position, a stopper member secured to the housing engageable with the shaft and movable core upon the movable core being disposed in the first position and a second spring member for continuously biasing the valve member

Abstract: A control device for a solenoid valve including a valve body provided with a fluid inlet and fluid outlet ports, a valve member provided in the valve body and movable between a closed and open positions and a solenoid coil for electromagnetically actuating the valve member. The control device includes a switching circuit which is adapted to alternatively direct an energizing electric current to the solenoid coil in one direction so that the valve member is moved toward the open position and in the opposite direction so that the valve member is maintained in the closed position. Since the valve member is maintained in the closed position by the electromagnetic force, it is possible to prevent the valve member from being moved out of the closed position even under vibrations to which the valve may be subjected in use.

Abstract: An electromagnetically operated valve unit includes a casing of magnetic material having inlet and outlet ports, a support shaft of non-magnetic material fixed in position within the casing and provided at its one end with an axial bore coaxial with the outlet port and an axial hole formed in the peripheral wall of the bore to provide fluid communication between the inlet and outlet ports, a plunger of magnetic material in the form of a sleeve member axially slidable on the support shaft and cooperating with the axial hole to open and close the fluid communication, a coil spring for biasing the plunger in one direction to normally close the axial hole, a tubular yoke of magnetic material surrounding the support shaft and facing at its inner circumference to the outer circumference of the plunger with a predetermined annular clearance, and a solenoid coil wound around the tubular yoke.

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: 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.