Abstract: A process for controlling the movement of a motorized door is disclosed. Also, a control apparatus that has a close loop feedback system for use in controlling a motorized door is disclosed. The invention provides for improved safety by incorporating improved obstacle sensing thresholds through the use of a comparator system.

Abstract: A control for a vehicle window driving motor in an H-switch semiconductor bridge with an SCR and a FET in each opposite armature current path includes control logic circuitry enabling one-touch actuation of window movement in either direction with stoppage by actuating either actuation device and with flip-flop control of the bridge elements to prevent shorting out the power supply. A variation provides automatic stoppage in the up direction by stall current sensing with automatic reverse after a time delay to allow the SCR conducting during upward movement to turn off.

Abstract: A position control system for controlling a motor-driven mechanism capable of occupying a plurality of specified positions comprises a plurality of switches for specifying a position to be occupied by the mechanism and an encoder for generating a specified position signal representative of the specified position and a loading circuit for providing a present position signal representative of the position presently occupied by the mechanism. A read-only memory circuit uses the specified and present position signals to provide a control signal for controlling the motor to move the mechanism to a particular position and a comparison signal and a particular position signal indicative of that particular position. A position detector responsive to the position of the mechanism provides a detection signal representative of the particular position when the mechanism reaches it.

Abstract: Disclosed is an automatic door actuator which comprises arithmetic unit for calculating a weight of a door, a distance of movement of the door and braking points of the door through learn control of door actuation which is effected once every time a power supply switch is turned on and irrespective of the on-off condition of a normal door actuation start switch; first memory for storing results of calculation by the arithmetic unit; second memory for previously storing various phase angles for starting operation, for deceleration braking operation and for predetermined low velocity control, corresponding to various weights of the door; whereby the control unit is responsive to the first memory to read out from the second memory the phase angles for starting operation, for deceleration braking operation and for predetermined low velocity control corresponding to the actual weight of the door determined in the learn control to thereby supply a trigger signal to semiconductor controlled rectifying elements in ac

Abstract: In order to obtain very long operating autonomy without maintenance, with low power consumption and low wear and tear, both the energizing and de-energizing of a DC motor are controlled by an electronic switching circuit providing bounce-free switching. A switching-on control circuit actuates the switching circuit, causing it to energize the motor. A switching-off control device, comprising a rotary component connected to the motor shaft and including contact elements responsive to the position of the rotary component, actuates the switching circuit to cut off the power supply to the motor after the rotary component has rotated through a predetermined angle. The arrangement is advantageous for driving apparatus which is not easily accessible and lacks reliable mains power. Another useful particularity consists in a multiple plug device whereby the rate of intermittent driving may be varied within the range of 1 day to 31 days.

Abstract: A control circuit is used during slow or stop-motion playback operation of a video tape device to drive video tape intermittently. In order to avoid errors in the stopping position of the tape, a pulse width modulated (PWM) signal is provided to a motor controller circuit associated with the capstan motor of the video tape device. A frequency signal generator coupled to this motor generates a frequency signal that varies with the capstan motor speed, and this frequency signal is provided to a retrigger monostable multivibrator which generates a PWM signal whose duty ratio changes in proportion to the capstan motor speed. A drive pulse generator and a brake pulse generator provide drive start and brake start signals, respectively, when it is desired to commence and stop movement of the tape.

Abstract: A motor driving a garage door is controlled by a controller, and the rotation of the motor in the normal and reverse directions is normally controlled in response to an actuating signal applied to the controller from a main push button switch. In a specific-mode in which an actuating signal is applied to the controller from an emergency push button switch, a mat switch or a fire sensor, the latter signal has priority over the former signal, and the motor is driven to move the garage door to its full-open position.

Abstract: A food processor is comprised of a food processing cutter which is driven by a motor connected to an AC power source, a switch for controlling on and off of the motor, a pulse generator for forming count pulses having a given period from the AC power source, a set switch, a start switch, and a timer which operates the start switch at a time point set therein to start the rotation of the motor. Further, the food processor includes an up-counter for counting the count pulses while the set switch is operated to store a driving time period data of the motor, and a down-counter to which the stored data of the up-counter is transferred when the start switch is operated by the timer. The down-counter counts down the data every time it receives the count pulse and produces a drive stop signal for the motor when its contents become "0".

Abstract: A motor driven winding mechanism suitable for a vehicle panel or the like, said window being movable by means of a raising and lowering mechanism (41) having an operating shaft (50) thereon which is rotatable to effect raising and lowering of the window, includes a reduction gear unit (10-30) drivingly coupled to the motor and to be mounted on the operating shaft for rotating that shaft, and sensing means (52-62; 72-80) for sensing rotation of the gear unit about that shaft due to reactive torque produced in the gear unit during operation and controlling operation of the motor in accordance therewith, for example, by de-energizing or reversing the motor upon a predetermined rotation being sensed. The sensing means senses predetermined displacement of the reduction gear unit around the operating shaft axis against the action of a spring (60, 80) resulting from reactive torque produced therein.

Abstract: An automatic door operator system is provided with a first potentiometer having its wiper arm coupled to a pivoting member whose angular position varies in accordance with the magnitude and direction of an obstructive load applied to the door. A second potentiometer is provided having its wiper arm coupled to a movable member whose position corresponds to the position of the door. The potentiometers are connected as voltage dividers and the voltages provided at their wiper arms are utilized for controlling the movement of the door.

Abstract: The device comprises for each window an electric driving motor and a selector which is adapted to ensure the selective supply of current to the motor, in one direction or the other, through a control circuit acting on a supply source. The supply source is of the type capable of delivering at least two distinct energy levels. The control circuit comprises means for applying to an input of the supply source an energy level control signal which produces, as a function of the position of the selector, the application of a torque to the motor when raising the window which is higher than the torque applied when descending the window.

Abstract: In a reversible motor-operated wiper mechanism including a rotary gearwheel through which drive is imparted to a wiper from the reversible motor, a device is provided for operating a limit switch for stopping the motor at a parked position of the wiper. The device has an annulus and integral cam form and neck disposed under the gear wheel and rotatable relative thereto. An arcuate plate is rivetted to the underside of the gearwheel and includes a downwardly projecting plate portion. During forward rotation of the gearwheel, an abutment surface of the plate portion engages the neck to drive the annulus and cam form. In this direction, a spring urges the cam form upwardly so that a plunger of the limit switch does not lie in the path of movement of the cam form. In the reverse direction of rotation of the gear wheel, a ramp surface on the plate portion urges the cam form downwardly so that the limit switch is operated.

Abstract: A control means for the wire wrapping machine comprising a lead wire wrapping spindle and an outer fixed sleeve for rotatably supporting the spindle in which after completion of the wire wrapping operation an inverse current is supplied to a motor for the short period to allow the spindle to rotate reversely so that a slot provided in the spindle always comes to a position in alignment with a recess provided in the outer sleeve.

Abstract: An improved garage door operator of the motor-driven chain-and-sprocket type comprising a molded plastic gear case assembly supporting an output shaft for rotation relative thereto. A molded plastic worm wheel is loosely disposed on the shaft for limited rotation relative thereto and is driven by a reversible electric motor through a worm. Camming surfaces on the worm wheel and a second element which is fixedly disposed on the shaft form a low-torque coupling such that under normal conditions the motor drives the shaft to move the garage door. If the door encounters an obstacle and is unable to move, continued rotation of the motor drives the cam surface of the second element up the cam surface of the wheel so as to axially shift the second element relative to the gear case to trip a reversing switch. A rachet knob projects outside of the gear case permitting manual adjustment of the low-torque coupling.

Abstract: Disclosed is a device for electronic direction control of trolling motors for maneuvering boats. The device includes a power supply, a steering mechanism including a motor for altering the direction of the trolling motor thrust, a direction control for generating a signal proportional to the desired direction of trolling motor thrust, and a direction sensor for generating a signal proportional to the actual direction of trolling motor thrust. Two electronic circuits are provided to process the desired and actual direction signals. The first circuit provides a pulse width modulated output signal which variably controls the angular velocity of the steering mechanism by controlling the operational state of a switching circuit having at least one transistor and thereby controlling the flow of current to the steering motor.

Abstract: An ophthalmic refracting chart projector having rotary slide discs, the images on which are projected on a screen, having remote operating controls permitting selective showing of the slides in selectable sequence.

Abstract: A rotary tap changer or switch is rotated by a motor to a plurality of contactor positions by a control system having a cam that rotates to activate limit switches respectively corresponding to contactor positions. The activation of the limit switches causes operation of a relay which, after a selected time delay, operates to discharge a capacitor across the motor to apply dynamic braking and stop the motor. When starting the motor to rotate the tap changer, energization is applied through the limit switches to select rotation in a forward or reverse direction determined with some modification by the shortest distance of rotation to the new selected position.

Abstract: A control device for a motor-driven closure panel, for instance an automobile sunroof panel whose closed position is an intermediate position between an open, retracted position and another open, pivoted position, the circuitry for the reversible motor including an impulse relay operating a control switch in one of the two motor connections, the relay coil being connected in parallel to the motor and between the control switch and the pole reversing switch, a position-responsive switch cutting off the relay circuit whenever the panel moves out of its closed position and energizing the impulse relay whenever the panel reaches the closed position. An improved switch arrangement prevents the panel from being stuck in a position in which the reversible motor becomes inoperative.

Abstract: A vehicle light control system for emergency and patrol vehicles equipped with emergency recognition rotating beacons in which the beacons are provided with side-facing flood lights for illuminating areas at one or both sides of a vehicle to provide means to observe conditions in the side areas of the vehicle position, and in which the control system provides means located inside the vehicle for directional control and selective operation of the side-facing lights with or without the operation of the rotating beacons.

Abstract: A television tuner drive system includes a bidirectional electric motor coupled to a rotatable channel selector. A carryover cam and switch coupled to the motor causes the motor power to be decoupled at each broadcast channel position. A plurality of cams are supported by a rotating drum coupled to the channel selector and coact with a cam follower and single pole switch to override the carryover switch and maintain power coupling to the motor. The drum-supported cams are positionable to selectively coact or clear the cam follower permitting programming of channel stop positions.

Abstract: An improved garage door operator of the motor-driven chain-and-sprocket type comprising a molded plastic gear case assembly supporting an output shaft for rotation relative thereto. A molded plastic worm wheel is loosely disposed on the shaft for limited rotation relative thereto and is driven by a reversible electric motor through a worm. Camming surfaces on the worm wheel and a second element which is fixedly disposed on the shaft form a low-torque coupling such that under normal conditions the motor drives the shaft to move the garage door. If the door encounters an obstacle and is unable to move, continued rotation of the motor drives the cam surface of the second element up the cam surface of the wheel so as to axially shift the second element relative to the gear case to trip a reversing switch. Up and down limits are established by means of a small threaded shaft which is driven off of the worm wheel and which produces linear displacement of a limit switch actuator traveler.