Abstract: In order to perform a vehicle speed control in a motor driven type power steering control device, a speed change point detection sensor is provided and an assist is added or removed according to a speed change point signal therefrom. Therefore, a construction of an input circuit and a control program become simple and a simple control unit can be used. Further, by inputting a speed change point other than those at which the assist is added, it is possible to easily determine a breakage of an input line for speed change point, resulting in a highly safe power steering.

Abstract: A motor controller for use on a treadmill to prohibit the treadmill from operating at a high speed immediately upon energization. The controller uses solid state circuitry in a motor speed circuit with a speed setting potentiometer set by the user. The system is adapted so as upon energization a minimum speed is initially achieved. The results are obtained with the interaction of a buffer circuit, solid state circuitry, and an SCR motor speed control circuit.

Abstract: The present invention relates to a drive control device for a motor actuator for use with an automobile air conditioner.The drive control device for a motor actuator is formed by using a transistor, and the supply of current from a power source to a motor constituting the drive unit of the motor actuator is carried out by the switching operation of a single transistor.A safety circuit is added to the control switches for applying a signal to the control device for the motor actuator, the safety circuit operates to always make the air condition in the compartment to be set required air conditioning mode.

Abstract: A device for controlling the output speed of a motor of a ring spinning machine, a ring twisting machine and the like in case of replacing travelers of such machines includes a speed setter for the motor and a potentiometer which is operatively connected with the speed setter to limit the output speed of the motor for allowing breaking in of replaced travelers. The potentiometer is further coupled with a speeding-up unit which is e.g. a stepper motor and which over a selected period of time increases the limited output speed to the normal operating level by automatically resetting the slider of the potentiometer from one end position to another end position.

Abstract: A coffee grinder has a control circuit for its electric grinder motor which includes a three-position control switch having a resident "Off" position, a resident "On" position, and a non-resident or momentary "On plus Start" position. In the "Off" position power is interrupted to all circuits of the grinder. The "On" position is a resting position which is resumed after the start of each grind cycle in readiness for the start of another grind cycle. The "On plus Start" position is momentary and in which a relay is energized so as to complete a circuit that energizes the grinder motor. In one type of coffee grinder the electrical control circuit includes a timer which can be set to determine the length of the grinding cycle. In another type of coffee grinder the length of the grinding cycle is determined by the presence of a ground coffee receiving bag or other container. In both types of grinders the normal grinding cycle can be terminated by placing control switch in its "Off" position.

Abstract: A wiper device has a reversible electric motor having an output shaft operatively connected to a reciprocally movable wiper blade. The electric circuit including motor armature is constructed such that, when a wiper switch is on, the motor shaft is reciprocally rotated in alternate directions within a predetermined angular range less than 360.degree. to reciprocally drive the wiper blade and that, when the wiper switch is turned off, the motor shaft is rotated beyond the predetermined angular range to move the wiper blade to a rest position out of its wiping range.

Abstract: A two speed motor control comprises push buttons that can be activated to start, stop, select a high start of speed or select a low start of speed for the motor. The high and low selector buttons can be used to transfer between high and low speed operation for the motor. Units in the form of AND gates for example can be provided with inputs to establish permissive conditions for a motor start up or speed change operation. These automatically avoid overheating the motor or starting the motor during an inappropriate condition of equipment connected to the motor. Start up and speed selection is achieved without the operator having to verify the existance of appropriate conditions.

Abstract: In an electrical tool having a clutch for adjusting rotational torque of the driven shaft, a limit switch of double-throw type is used for detecting the state of the clutch, and a capacitor is arranged to be charged via the limit switch. In one embodiment of the instant invention, the capacitor is normally discharged and is charged when the clutch assumes a disengaged state, thereby producing a trigger pulse used for making a short circuit for the motor only when the capacitor is not fully charged. In another embodiment, the capacitor is normally charged, and is discharged when the clutch assumes a disengaged state, thereby producing a trigger pulse used for making a short circuit for the motor. With this arrangement a switching circuit provided for making the short circuit for the motor is effectively prevented from making the short circuit when a power switch is turned on irrespective of the state of the clutch.

Abstract: An arrangement to preclude false starting and stopping of a motor driving a loom in accordance with start and stop control signals from a microprocessor control unit susceptible to noise. The motor is connected to start only upon coincidence between the control unit start signal and energization of a manually operated start switch; and to stop in response to either the control unit stop signal or energization of a manually operated stop switch.

Abstract: Windshield wiper apparatus for a motor vehicle includes a first wiper pivoted below the driver side of the windshield and capable of wiping an arc between the bottom center and the driver side end thereof, a second wiper pivoted to the passenger side of the pivot of the first and capable of wiping an arc between the bottoms of the driver and passenger sides thereof, said arcs having a substantial portion of overlap on the driver side, first and second motors effective to drive the first and second wipers at substantially similar speeds and control apparatus having a mode of operation in which it is effective to drive the wipers in tandem from the bottom of the windshield to the end of the arc of the first wiper at the driver end of the windshield, hold the first wiper in that position while driving the second wiper to the bottom of the driver side and back and then drive both wipers in tandem back to the starting point.

Abstract: The control station comprises an enclosure having two terminal blocks disposed therein. Each terminal block has a set or normally opened and normally closed contacts which are mechanically interlocked and movable into an open and closed position respectively by an actuating lever. The ground terminals of each set of contacts on each terminal block are electrically interlocked for common connection to an external ground line. The wiring terminals of the normally closed contacts are electrically interlocked to provide a parallel connection through the respective normally closed contacts between an external circuit and the ground line. The terminal of the normally open contact on each terminal block is electrically connected to an external circuit, each proceeding an independent sequence for some controlled device when the contact is closed.

Abstract: An electronic control means utilized in an electrically actuated shift apparatus for a multispeed axle including an electric power source and an electric motor coupled to actuate means for shifting the axle. The power source is connected to the electric motor through a shift speed control switch and a plurality of steering diodes. When the switch is actuated to select an axle speed, power is applied through one of the steering diodes to one side of the armature of the motor. Power is also applied through another of the diodes as a shift signal to a timing circuit. A first means is responsive to the shift signal for generating a first control signal for a first predetermined time. At the termination of the first control signal, the timing circuit generates a second control signal to connect the other side of the motor armature to ground thereby actuating the motor.

Abstract: A pre-step timer circuit for pre-advancing the next timer period (control step) in a DC motor controller, such as in a crane-hoist controller. A sensing resistor module is connected from the line side of a contactor coil of a preceding control step to the input of a timer module in series with the accelerating contactor coil in the next control step. This resistor module sensing the previous coil voltage provides a feed-forward path for the sensed voltage signal to pre-time the next timer module. So, if a master switch is left in the previous control step long enough for the next timer module to time out, then the next control step is actuated immediately when the master switch is advanced thereto.

Abstract: When the user presses a touch-activated switch a first time, a first digital storage device becomes set and furnishes a platter-motor-start signal to the control electronics of the platter drive motor. If the touch-activated switch is pressed a second time, the first digital storage device becomes reset, and the signal commanding that the platter drive motor operate terminates. A second digital storage device likewise assumes its set and reset states in response to the first and second pressing of the touch-activated switch. Sensors ascertain various operating conditions during the course of turntable operation, such as the swinging of the tone arm to the position corresponding to the lead-in groove of a phonograph record. The states of the digital storage devices are additionally dependent upon the conditions sensed by the sensors. Logic circuitry interprets the combinations of states of the digital storage devices and causes the requisite turntable operations to be performed, e.g.

Abstract: An electronic current sensor and controller for automatically controlling the extension and retraction of a power antenna with the energization and de-energization of an automobile radio receiver.

Abstract: An interlock system for manual and automatic starting of a turbine engine in which the automatic system is independent of the manual system, and in which the automatic and manual systems are prevented from interfering with each other. This is accomplished with a dedicated computer and electronic logic circuitry which insures that the automatic start system cannot be initiated when the engine is running or when manual starting has been initiated.

Abstract: When the user presses a touch-activated switch a first time, a first digital storage device becomes set and furnishes a platter-motor-start signal to the control electronics of the platter drive motor. If the touch-activated switch is pressed a second time, the first digital storage device becomes reset, and the signal commanding that the platter drive motor operate terminates. A second digital storage device likewise assumes its set and reset states in response to the first and second pressing of the touch-activated switch. Sensors ascertain various operating conditions during the course of turntable operation, such as the swinging of the tone arm to the position corresponding to the lead-in groove of a phonograph record. The states of the digital storage devices are additionally dependent upon the conditions sensed by the sensors. Logic circuitry interprets the combinations of states of the digital storage devices and causes the requisite turntable operations to be performed, e.g.

Abstract: A vehicle with apparatus for discharging material such as salt on a roadway or the like at a rate that a control system automatically varies with vehicle speed includes means that ordinarily interrupts normal control to prevent discharge of material while vehicle speed is below preselected threshold value. The system also includes a blast circuit which responds to momentary manual operation of a switch to impose a blast signal on control system to override all other control activity to cause rapid dispensing of material for a preselected period even if vehicle is stopped or moving below the threshold speed.

Abstract: A speed control system for a chairlift which reproduces automatically at the arrival of a seat in the disembarking station the speed which this seat had in the embarking station. The speed information is applied to a shift-register or a magnetic recorder which restores this information to control the speed at the arrival.

Abstract: Apparatus for remotely adjusting reference indicia of display instruments such as flight instruments wherein a knob affixed to the shaft of a d.c. generator, remotely disposed from the flight instrument produces a d.c. signal, the magnitude and polarity of which are dependent on the speed and direction, respectively, of rotation of the knob. The d.c. signal is coupled to a d.c. motor mechanically connected to said flight instrument reference indicia and adjusts the same accordingly. The apparatus further includes circuitry, electrically connected between the d.c. generator and the d.c. motor for producing compensating voltages equal to the start-up voltages of the d.c. motor, which when added to the d.c. signal insure a continuous response by the d.c. motor to the d.c. signal, and also for isolating the output impedance of the d.c. generator from the d.c. motor.

Abstract: A protective panel circuit provides under-voltage protection to existing manually operated motor controllers, and in addition assures that the controller is returned to the off or start position after a power interruption before the motor circuit can be re-energized.