Abstract: In a control circuit for a vehicle windshield wiper system, a relay energization retaining circuit forms a self-sustaining circuit jointly with a relay drive transistor for driving a wiper relay, and maintains supply of electric current to the wiper motor when the ON signal for the relay drive transistor is terminated as long as the auto stop switch is at the brake position until the auto stop switch subsequently moves on to the drive position.

Abstract: A control system for an automotive vehicle multi-functional apparatus employs an electronic control unit operably controlling a rear window wiper assembly. In another aspect of the present invention, an electronic control unit is operable as a multiplexed rear node for controlling a variety of liftgate devices and functions. In a further aspect of the present invention, an electronic control unit controls a single multi-functional electromagnetic device. The multi-functional electromagnetic device uses intermittent motion mechanisms to selectively operate differing devices driven therefrom. A method of operating the electronic control unit of the present invention is also provided.

Abstract: An improved interval control device comprising a timing device; a memory unit; trigger button actuable, a first time, by the user to initiate operation of the desired mechanism and to start said timing device to determine the duration of operation of said desired mechanism; said trigger button being actuable a second time by said user to halt operation of said desired mechanism, to cause said memory unit to store the time of operation indicated by said timing device and to restart said timing device to determine the length of the rest period; said trigger button being actuable by said user a third time to restart operation of said desired mechanism and to cause said memory unit to store the duration of said rest period and, thereafter, to actuate said desired mechanism in accordance with the stored intervals of operation and rest; and a device for ceasing said operation.

Abstract: The present invention relates to a method of governing a system such as a vehicle screen wiping system. It also relates to a governing apparatus for performing the method of the invention, and to a governed system of the simultaneous or synchronized type, for wiping a glass surface of a vehicle.The governing apparatus according to the invention includes a low level control module which effects, in the system, a reversion to a stable state. The command signal from the low level control module is generated by an intermediate level control module which operates as an open loop. Finally perturbations are compensated for by a high level control module which produces a modification of the command signals in such a way as to render the governing action convergent. The modification of the command signals consists in reducing the rate of propagation of the command signals when the load increases.

Abstract: A circuit for implementing dual wash/wipe controls in an automotive vehicle having right- and left-side driver stations. The circuit can be used with existing wash/wipe control switches and comprises solid state diodes, a single selector switch, and a single relay, connected in a novel configuration with other existing components. The selector switch selects a wash/wipe switch at either one of the driver stations to have control over an electric-motor driven wiper motor to the exclusion of a wash/wipe switch at the other driver station. Diodes couple each wash/wipe switch to a wash/wipe electronic control module that in turn operates the electric-motor driven wiper motor.

Abstract: A device for operating a windshield wiper, with the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit which receives a control signal from the evaluator for operating the windshield wiper if a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value. The evaluator includes a detector stage for determining whether the sensor signal or the values derived therefrom lie within a normal range (UGR, OGR), and a selector stage for switching to a predetermined base interval mode of operating of the wipes when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range.

Abstract: The invention relates to a device for the automatic control of a windscreen wiper motor. The device has a moisture sensor which emits a signal depending on the moisture on the windscreen or another point on a motor vehicle so that this signal to some extent produces an analog reflection of the moisture varying in time. The output signal of the sensor is evaluated in such a way that it is continuously compared with a threshold value which can be altered. Every time this threshold value is reached or exceeded by a pulse-like change in the sensor output signal, this event is counted. After a given number Z of such events the windscreen wiper motor is switched on.

Abstract: A windshield wiper control detects a stall condition of the windshield wiper motor such as may be caused by a freezing of wiper blades to the windshield by monitoring the commutating switch normally used to park the windshield wiper blades when the wipers are turned off. Failure of the signal from the switch to change indicates the motor has stalled and causes a timer holding a value greater than a wiper cycle to time out and de-energize the wiper motor. The wiper motor is re-energized by turning off then on again the wiper control. A method of setting the interval between intermittent operation of the wiper with a single switch, times from previous wiper cycles to the switch activation to set a longer or shorter wiper cycle interval.

Abstract: Harsh full voltage conductive switching action is removed from a commutator-type rotary switch integral with a motor assembly and is placed in relay contacts external to the motor assembly by controlling reduced current through the rotary switch to the relay to maintain the relay energized after a control voltage is removed from the relay, and initiating a fixed time one-shot pulse generator in response to the rotary switch opening the reduced current to de-energize the relay and switch the load into a dynamic braking circuit at a particularly timed moment.

Abstract: This invention relates to a control system and method for a vehicle speed-response type intermittent wiper. An operation time interval for the wiper, which serves to wipe a window of a vehicle, is set in accordance with a speed of the vehicle to drive the wiper at the operation time interval. Upon detection of a start of the vehicle from a stopped state, the wiper is driven in temporary precedence of the wiper operation time interval so that driving of the wiper can be adequately controlled to ensure the provision of a sufficient area of vision without driving the wiper beyond necessity.

Abstract: A wiper system for a motor vehicle window includes a wiper arm, a permanent magnet motor, a linkage connecting the motor with the wiper arm, and a switching mechanism. The wider arm is adapted to be rotatably mounted on a vehicle body for operable movement between first and second end wipe positions. The motor is of the three brush permanent magnet type, the brushes being a high speed brush, a low speed brush and a common brush. The switching mechanism is responsive to wider blade position and is closed, electrically connecting the high speed brush with the low speed brush, thereby achieving an intermediate speed, in at least one end wipe position.

Abstract: A windshield wiper controller 10 is provided for automatically regulating the operating speed of a motor powering a windshield wiper. An automatically set or manually set wiper speed selector 36, 48 is provided for selecting a wiper speed setting to initially control the operating speed of the windshield wiper motor. A sensor 22 senses the actual speed of the windshield wiper movement relative to the windshield. Controller 32 is responsive to the sensor 22 and automatically generates a wiper speed increase signal to the selector when the sensed wiper speed is less than a selected value, and similarly generates a wiper speed reduce signal when the sensed wiper speed is greater than a selected value. The wiper speed sensor 22 may include a magnet 20 which acts as a triggering mechanism outputting a signal from the wiper sensor. A timer 44 measures the time interval between at least a substantial portion of the forward wiping motion and the return wiping motion.

Abstract: An intermittent windshield wiper system includes a wiper control module and a wiper switch which allows an operator to set a time delay between consecutive wipes of a windshield wiper. The wiper switch includes an input setting that allows an operator to set the time delay according to the operator's needs and weather conditions. The wiper control module records the time delay and controls a wiper motor to repeatedly actuate a windshield wiper with the operator-set time delay between consecutive actuations of the windshield wiper. In one embodiment, the control module includes a timer for measuring the time delay, a memory for recording the time delay and a motor control for controlling the wiper motor. A method of controlling a windshield wiper for a vehicle is also disclosed.

Abstract: A rotary motor including the combination of an electromagnetically powered first motor and an electrically powered second motor. The first motor and the second motor being mechanically coupled to each other via a common drive shaft for delivery of produced rotary power. The first motor member includes at least one radially disposed electronically pulsed ON/OFF electromagnet member that magnetically couples to a rotatable permanent magnet member disposed on a flywheel member attached to the common drive shaft. The second motor member being electrically coupled to the first motor member for receiving secondary electrical energy produced from back-emf and/or electric power generated by induction at the electromagnet member. The second motor member is adapted with a flywheel member having embedded permanent magnets that influence the flux fields that surround the rotating armature and stator poles to enhance performance of the second motor.

Abstract: Two windshield wiper blades are powered by separate electric motors. The blades overlap and when one blade is at its reversal point the other blade leaves part as the other blade begins to return to park. The position of the blades is encoded. The blades, if synchronized should be at identical locations and position codes at the same time. Motor power to the blade that arrives first is be removed, allowing the blade to coast. If the other blade still does not arrive at the position after an elapsed time, the first to arrive blade is dynamically braked. Intermittent wiper operation is provided in a way that initiates an immediate wipe if wiper delay is changed while the blades are parked.

Abstract: The invention proposes a process and a device for powering an electric motor (M) intended particularly to drive a windshield wiper arm of a motor vehicle, of the type comprising a control unit (2) connected to control elements (3) under user control and to position sensors (5, 6, 7) of the windshield wiper arm, and comprising means (9) of control of the supply to the motor controlled by the control unit, characterized in that it comprises means (2a) for switching off the supply to the motor at the end of a first determined time (TETA.sub.1), whose inhibition is provided by the position sensors (5, 6, 7) so as to switch off the supply to the motor (M) during a second determined time (TETA.sub.2) if these switching off means have not been inhibited by activation of a position sensor by the arm.

Abstract: A motor drive system for imparting oscillating motion to a window wiper is disclosed which slows the wiper as it approaches respective right and left positions and holds the wiper at the right and left positions for a selectable delay interval in order to avoid deleterious effects of instantaneous motor direction reversal. The system includes a motor drive chip for generating the drive signal to the window wiper motor, a programmable logic array for sequencing the operation of the motor drive chip, and a delay chip for timing the selected delay.

Abstract: A feedback control circuit limits current being supplied to an electric drive motor. The motor drives a load cyclically along a path, and the load closes a switch when it passes a predetermined position. This activates a timing circuit which times out after a predetermined delay. If the load does not return to the predetermined position at the end of the prescribed delay time, then an oscillator circuit is triggered into operation to periodically terminate current flow to the motor. This provides cooling periods and enables the motor to exert repeated, temporary high torque efforts to restore normal operation.

Abstract: A method and apparatus for finely adjusting the dwell period for an intermittent windshield wiper. A multi-position switch establishes a maximum delay and a delay request. A processor reads the switch setting and senses the timing of a positioning movement relative to the timing of the next preceding wiper blade stroke. When the elapsed time between those events is intermediate the maximum delay and the delay request, the dwell period is set equal to the elapsed time. Otherwise the dwell period is set equal to the maximum delay.

Abstract: A device is described for controlling the operation of an electric motor for driving the arm of a windshield wiper of an opening window, particularly the rear window of an automotive vehicle. The device has a control unit for supplying power to the motor. The operation of the motor is controlled by a key contact of the vehicle and a control element. The key contact and the control element are under user control and are connected in series between a power supply source, the control unit, and a contact for detecting the opening or closing of the window. The device is further characterized in that the open window detection contact is connected to a control unit data input so that it controls restarting the motor only after opening and closing of window and only after reinitialization of the control element by interruption of the control element and by a new user action on the control element.

Abstract: A drive control circuit includes a first and a second relays, each of which selectively connects one of the terminals of a motor with a power supply. A power connecting circuit can connect the power supply with each one of the relays. A control circuit controls the power connecting circuit to disconnect the power supply from the first and second relays, and then controls to switch the connecting arrangements between the power supply and each terminal of the motor utilizing the first and second relays. Therefore, the rotational direction of the motor is switched, or the rotation of the motor is stopped.

Abstract: A windshield wiper control system improves vehicle windshield wiper operation by selectively controlling the motor speed of a dc motor that drives the wiper blade across the windshield. The motor speed is reduced for a portion of the wiper pattern adjacent the reversal points at each end of the wiper pattern. The motor speed is changed as a function of blade position by varying the duty cycle of an excitation voltage signal provided to a variable speed dc motor. The disclosed embodiment is useful for variable and continuous speed control in a vehicle wiper system.

Abstract: A windshield wiper system in which a dedicated microcontroller controls not only the wiper motor, but also a solenoid which provides dynamically variable downforce on the wiper blade.

Abstract: It is an object of the present invention to offer a headlamp cleaning device which is always capable of attaining a constant cleaning capacity by keeping the ejected quantity of the cleaning fluid constant for a single cleaning operation without any regard to the fluctuations in the voltage of the electric power in the power source.The headlamp cleaning device according to the present invention is provided with an electric power source voltage monitoring means which monitors the power source voltage as applied to a cleaning device motor. This device furnishes the power source voltage to the electric power supply time setting means. When a cleaning device switch 9 is turned ON, the electric power supply time setting means 10-2 sets the driving time T to a longer time period when the value of the electric power source voltage is low, but sets the driving time T to a shorter period when the value of the electric power source voltage is high.

Abstract: An improved actuator (10) wherein movement of an external potentiometer (R.sub.x) to drive a bi-directional motor (50) and move an attached member starts a timer (68). When a predetermined time period has elapsed, the actuator cuts power to the drivers (U1) of the motor, thereby putting the system into a "sleep" mode in which a minimum amount of current is drawn. If the external potentiometer was moved so as to cause an end of travel position of the member and the motor stalls, the actuator maintains this stall condition only until expiration of the predefined time period at which time the sleep mode is initiated. This sleep mode is thereafter maintained until power is reset or until the position of the external control potentiometer is changed. The time-out period is set to allow for full movement of the vane as well as to compensate for any uncertainty as to whether an end of travel position has been reached.

Abstract: A vehicle window wiper interfacing arrangement for interconnecting a window wiper function switch, a wiper motor controller, and an auto-delay controller to permit a water drop sensor to control a window wiper delay time when a window wiper system is operated in an AUTO-DELAY mode. The auto-delay controller outputs three wiper function signals, namely OFF, LOW speed and WASH to the wiper motor controller via a single bi-directional multiplexed line. The wiper motor controller outputs a wiper position signal to the auto-delay controller via the same bi-directional multiplexed line for use by a control program to determine a proper wiper delay time period.

Abstract: A miniaturized window wiper includes a mounting hub having a concealed mounting boss therein, the hub being pivotally connected to a wiper arm which further mounts and shrouds a wiper blade holder, the wiper arm being subjected to tension by a torsion spring in order to bias a wiper blade against a window. A motor drive system for imparting oscillating motion to the wiper is also disclosed.

Abstract: Apparatus, for example vehicle screen wiping apparatus, is controlled by a control system comprising an emitter connected to a slave receiver through a single transmission channel. The emitter is arranged to deliver control or command signals, each of which is represented by a predetermined electrical quantity, so that at least one control signal can be passed along the transmission channel to the receiver connected to the other end of the latter. The receiver activates the electrical load such as the electric motor of the wiping apparatus. The emitter produces a plurality of values of an electrical quantity, representing control or command signals produced by a suitable device such as a switch. These control signals are passed to the slave receiver, via the single transmission channel, and are decoded by the receiver.

Abstract: A neural network provides automatic control of a windshield wiper. A rain sensor generates sensing signals indicating a rain pattern, and the neural network generates wiping demand signals indicating a wiping action desired by the driver. A training unit uses manually generated wiping supervision signals to create weight factors for the neural network.

Abstract: A rain detector in which the level of a sensor signal (15) which is emitted by a sensor (14) or the level of a sensor signal (17) which is processed by a signal processing unit (16) is set at a predetermined resting level (44) by a control unit (19, 30). This use of a predetermined reference level makes possible an automatic calibration of the rain detector which takes into consideration all tolerances for electrical and optical components, their age-related drift, and tolerances during the installation of the rain detector.

Abstract: A wiper control system which includes dual wiper control circuits operating from a single rotary control switch, which is mounted in a cockpit of an aircraft remote from the rest of the wipers and system components which are mounted near an aircraft windscreen in a housing from which a motor converter drive shaft protrudes generally normal to a portion of the airframe surface. The drive shaft is connected to one end of a wiper arm and the second end of the wiper arm is rotatably attached to the wiper blade. The dual wiper control circuits are electrically isolated from each other. The rotary switch includes dual voltage dividers and a single axial rotating member to create an analog voltage output signal representative of the control switch position which is interpreted by a controller circuit. The rotary switch speed selections include a HIGH speed, a LOW speed, an INTERMITTENT delay selection, and also a selection for PARK and OFF.

Abstract: The present invention is an improved windshield wiper assembly. The assembly includes a wiper blade which undergoes oscillatory rotary motion and is swept back and forth between two extreme locations across a windshield to remove rain and other precipitation from the windshield. A brushless DC motor has its output shaft connected to the wiper assembly. The foregoing results in rotary oscillation of the blade and permits the elimination of the four-bar mechanism which is typical of prior art wiper assemblies. The rotary motion of the blade in either direction is decelerated when the blade reaches a preselected position between two extreme locations.

Abstract: An apparatus and method for controlling a windshield wiping system, including a motor and windshield wipers, by detecting when a wiper passes over the portion of the windshield monitored by an optoelectronic sensor for the last time during a complete wipe cycle. In addition to the sensor, the apparatus includes a switch arrangement for activating the windshield wiping system and a circuit for processing the sensor output. The apparatus also includes a switching contact device associated with the motor for detecting the resting position of the windshield wipers.

Abstract: A window wiper comprising an arm having an end rotatably mounted near a window glass, a sliding member reciprocally slidable along the sliding member, a loop-like control cable connected to the sliding member, a mechanism for actuating the arm to reciprocally rotate, and a mechanism for actuating the control cable to reciprocally circulate in synchronized with the motion of the arm, whereby the window glass can be swept with single arm.

Abstract: A windshield wiper system (10) which includes an electrical drive motor (12) that makes available a driving moment for at least one windshield wiper (16) performing a back and forth movement on a pane to be cleaned. A signal processing arrangement (20) is provided which, by way of an electrical switching stage (18), controls or regulates the rotation rate of the drive motor (12) to a constant value.

Abstract: A method for generating stepper motor ramps and analyzing the motor torque required compared with the motor torque available wherein the generated ramp accelerates the motor as fast as possible while maintaining a user settable torque safety factor and/or safety margin. The method uses the minimum available stepper motor torque at the current motor speed to ultimately compute the maximum useable acceleration, uses the maximum acceleration to generate the next motor step time and hence the next motor velocity, computes the next velocity from the desired acceleration and the previous velocity and utilizes friction during deceleration of the motor.

Abstract: In a vehicle window wiper system having an electric drive motor with high, low and common brushes, electric motor energizing apparatus and forward and reverse motor operation, an auto-resetting current limiting device provides non-sacrificial protection to motor windings and associated circuitry during the various modes of motor operation.

Abstract: A windshield wiper assembly which effects relatively smooth wiping motions as a pair of wiper blades are moved independently of each other such that the wiper blades do not interfere with each other. One wiper blade moving in a direction of approaching an overlapping area is stopped when that wiper blade has preceded the other wiper blade moving in a direction of moving away from the overlapping area by a first predetermined value or more. Meanwhile, the wiper blade moving in the direction of moving away from the overlapping area is stopped when that wiper blade has preceded the wiper blade moving in the direction of approaching the overlapping area by a second predetermined value or more exceeding the first predetermined value.

Abstract: A windshield wiper system and method includes a dc motor for connection to drive a windshield wiper. A motor current switch controls current through a field winding of the dc motor. First and second speed selection switches are provided for selecting a speed desired for the windshield wiper. Means responsive to actuation of the first speed selection switch operates the motor current switch to control the current through the field winding of the dc motor for a first duty cycle, and means responsive to actuation of the second speed selection switch operates the motor current switch to control the current through the field winding of the dc motor for a second duty cycle different from the first duty cycle. A delay switch is provided, and a motor drive circuit responsive to a first activation of the switch enables the circuit for operating the motor to drive the windshield wiper once.

Abstract: A motor vehicle glass wiper system includes first and second motor assemblies and respective first and second wiper blades. Each motor assembly is effective to move its respective wiper blade through a wipe pattern that is bounded by an outboard direction reversing position and an inboard direction reversing position. The wipe patterns of the first and second wiper blades overlap to establish an interference zone of potential wiper blade contact which is adjacent both inboard direction reversing positions and bounded thereby. A wiper motor control monitors a respective key position sensor for each wiper blade. The control energizes each one of the wiper motors to move its respective wiper blade to the inboard direction reversing position and back to the outboard direction reversing position each time the key position sensor of the other one of the wiper blades indicates a transition out of the interference zone thereby inhibiting interference between the wiper blades.

Abstract: A wiper apparatus for wiping the windshield of a vehicle with a plurality of wiper blades operated by a plurality of wiper motors which comprises an intermittent switch, autostop switches disposed to the respective wiper motors, relays for operating the respective wiper motors in response to ON-states of the respective autostop switches, a relay driving circuit for driving the relays, a first timer circuit responsive to OFF-states of both the autostop switches for generating a first timer signal, a second timer circuit responsive to an intermittent signal from the intermittent switch and the ending edge of the first timer signal for generating a second timer signal, a third timer circuit responsive to an ON-state of either autostop switch for generating a third timer signal and holding the relay driving circuit to drive the relays, and a prohibiting circuit for forbidding and permitting the operation of the relay driving circuit according to the first timer signal and the second timer signal, respectively.

Abstract: Apparatus is provided for controlling a windscreen wiping system. The apparatus includes a circuit arrangement which includes a microcontroller, a clock generator unit comprising a switch and a clock-pulse generator, an I/V converter, a phase-selective rectifier and an amplifier with a low-pass characteristic. The apparatus also includes an optoelectronic apparatus having IR beam transmitters for transmitting useful signals in clocked form and IR beam receivers for receiving the transmitted useful signals. The IR beams which are transmitted are influenced between the IR beam transmitters and the IR beam receivers by a liquid or solid coating on the screen, such that the signals received by IR beam receivers are varied in dependence upon the coating present on the screen. The amplifier filters out the interference quantities of the ambient light to obtain a processed useful signal.

Abstract: A wiper controller comprises a power source, a wiper drive motor, a power switch, a wiper switch, a position detector for detecting the position of a wiper on the windshield of a vehicle, a drive control circuit for controlling the power supply to the motor, and a switch circuit for controlling the power supply to the drive control circuit. The drive control circuit is connected to the power source, and controls the power supply to the motor from the power source, based on the ON/OFF status of the power switch and wiper switch, and also based on information from the position detector. The drive control circuit causes the wiper to stop at a predetermined position on the windshield. The switch circuit allows power to be supplied to the drive control circuit when the power switch is switched on, and further allows the power to be supplied, for a predetermined period of time, after the power switch is switched off.

Abstract: A wiper system for wiping a windshield of an automotive vehicle. The wiper system is comprised of a wiper arm to which a wiper blade is movably fixed. The wiper arm is driven by a wiper motor through a link mechanism so as to move the wiper blade in such a manner that the moving speed of the wiper blade is accelerated at an initial period and decelerated at the remaining period in a stroke of wiper blade movement. The degree of deceleration is reduced in the course of the remaining period, thereby omitting troublesome or bothersome feeing of a driver seated in the vehicle.

Abstract: A windshield wiper system has two motors. Each propels its own wiper blade. A blade parking disk is attached to each motor and contains a conductive and a non-conductive segment. Electrical power supplied through the conductive segment to the motor from a "parking contact", is interrupted by the non-conductive segment, parking the blade. During normal operation, the voltage change on the "parking contact" is sensed for each motor to determine if one motor is faster than the other. If the speed difference exceeds a set level, power to the faster motor is interrupted for a preset time interval during each rotation of the parking disk, until the difference is less than the set level. The voltage on the parking contact is also sensed for the higher voltage produced if the motors are operating at high speed. If the motors are operating at high speed, the preset time interval is increased and the allowable speed difference is reduced.

Abstract: Windshield wiper systems are commonly used on vehicles that must operate out-of-doors. In systems employing two or more wiper elements, each operating from an individual wiper motor, some mechanism must be employed to prevent out-of-sync operation from causing the wiper elements to collide if they operate in an overlap area. The instant wiper system includes first and second electric motors each drivingly connected to a respective windshield wiper element. Switching devices selectively controllably provide electrical power to the motors in response to receiving respective motor control signals. Synchronizing devices provide first and second synchronizing signals in response to the respective wiper elements being positioned at corresponding predetermined cycle start locations. A logic circuit controllably produces the motor control signals in response to receiving the respective synchronizing signals.

Abstract: A head lamp washer is disclosed, which is for use in a motor vehicle having a head lamp and a windshield washer for washing a windshield of the motor vehicle. The head lamp washer comprises a washing liquid spray system for spraying washing liquid over a face of the head lamp. The spray system has both a manual mode in which the spray system operates independently and an automatic mode in which the spray system operates in cooperation with the windshield washer. A manual mode setting switch causes the spray system to assume the manual mode when turned ON and an automatic mode setting switch causes the spray system to assume the automatic mode when turned ON. Under the operation mode, the washing liquid spraying starts when the operations of the windshield washer are counted to a predetermined number. The amount of washing liquid sprayed under the automatic mode is less than that sprayed under the manual mode.

Abstract: The wiping device for a windshield of a motor vehicle includes at least one wiper lever with an articulated wiper element which contacts the windshield and is driven in a reciprocating manner between two reversing positions by a drive unit. A particularly reliable and precise operation is obtained, when the wiper lever is provided with at least one sensor on the windshield detecting a predetermined operating position of the wiper lever. The wiping device has a control device, to which the sensor and the drive unit are in working connection so that the drive unit can operate the wiper lever according to signals from the sensor.

Abstract: An automatic perfumer capable of operating in one of a plurality of modes to suite varying room conditions, the modes including an intermittent mode for perfuming at predetermined intervals, and a light-activated intermittent mode for operating as described above and only upon the application of light, thereby avoiding needless nighttime operation.

Abstract: An apparatus and method for controlling a windshield wiping system, including a motor and windshield wipers, by detecting when a wiper passes over the portion of the windshield monitored by an optoelectronic sensor for the last time during a complete wipe cycle. In addition to the sensor, the apparatus includes a switch arrangement for activating the windshield wiping system and a circuit for processing the sensor output. The apparatus also includes a switching contact device associated with the motor for detecting the resting position of the windshield wipers.