Abstract: A raindrop detection wiper is provided with a raindrop detector for detecting a raindrop, a wiper motor for actuating a wiper blade, an automatic stop mechanism for stopping the wiper blade at a predetermined position, a control mechanism comprising a current detector, a memory and the like for operating intermittently or stopping the wiper motor in accordance with a signal from the raindrop detector and memory data stored by the memory. According to this invention, it is possible to wipe the wiping surface automatically by detecting the raindrop and drive current of the wiper motor even in a very light rain.

Abstract: A wiper control system includes measures an elapsed time of operation cycle, through which a wiper blade assembly performs one cycle of wiper operation. The wiper control system resets the measured elapsed time when ever the wiper blade assembly reaches a predetermined position. On the other hand, wiper control system detects the measured elapsed time exceeding a given period of time to initiate a predetermined fail-safe operation. In practice, the fail-safe operation is performed to intermittently drive the wiper motor with an interval which is long enough to sufficiently cooling off the wiper motor, when fail-safe operation is performed while wiper system is maintained ON, and to terminate driving of the wiper motor when the wiper system is turned OFF.

Abstract: A windshield wiper motor is provided with an auto-stopping switch having a first contact plate, a second contact plate, a third contact plate and a contact shoe for contacting with said third contact plate at all times and for contacting selectively with said first or second contact plate by sliding reciprocatively on a straight line in accordance with rotation of the final gear of reduction gear. It is possible to prevent the auto-stopping switch from chattering caused by snow gathered in the vicinity of a stopping position of a wiper blade in snowfall.

Abstract: A method and device for adapting the sensitivity of a sensor system for the detection of precipitations during the control of wiping intervals of a screenwiper drive of a motor vehicle as a function of the kinetic energy of striking precipitations. A pressure-sensitive sensor of a sensor system detects striking precipitations, the detections of striking precipitations are converted into electrical output signals, and the output signals are transmitted via a transmission path to an amplifier with an amplification factor for activating a wiper-motor control circuit. The electrical properties of the transmission path are varied as a function of ambient temperature such that the responsiveness of the sensor system is increased with decreasing temperatures, so that a reliable response even to snowflakes of small mass are achieved.

Abstract: In a windshield wiper system for vehicles, with which a rain detector is associated, the rain detector operates according to the principle of detection of the absorption by wet glass of light rays which are subjected to multiple total reflections within the windshield.The detector comprises a plurality of non-directional light sources together with a plurality of sensors each of which receives the light from the various sources. The light sources are modulated at different frequencies, and the sensors are associated with demodulation circuits, such that more detailed and accurate information as to the nature of the reductions in transparency of the windshield is obtained. The windshield wiper system is then activated in the light of this detailed information.

Abstract: An electromechanical A.C. motor reverser having a timed cam-driven SPDT switch with the side terminals thereof connected to separate motor stator coils. The movement of the transfer blade between contacts to break one motor coil circuit and complete the other reversing motor coil circuit is delayed sufficiently by the cam to permit the motor rotor speed to decay enought to enable reversal of rotation upon completion of the reversing coil circuit. The minimum contact transfer time is set at the period corresponding to two cycles of power line current.

Abstract: A motor vehicle has front and rear electric motor driven wiper mechanisms including front and rear control switches effective to independently activate and deactivate front and rear wiper operation and front and rear park switches effective to independently provide, for each of the front and rear wipers, automatic wiper parking when the respective control switch is turned off. The vehicle has a driveline transmission with a reverse indicator and a control circuit responsive to the reverse indicator to interconnect the rear wiper motor with the front wiper control switch and disconnect the rear part switch when vehicle reverse operation is indicated.

Abstract: A wiper controller, responsive to any of a plurality of wash and wipe conditions, causes a short circuit protection circuit to inhibit control if the wiper motor becomes shorted. Hysteresis is employed for comparator operation of an intermittent wipe circuit that enables suitable short circuit protection.

Abstract: A windshield wash and wipe after wash circuit responsive to any of a plurality of wash and wipe conditions causes a wiper arm and blade assembly to park with a high rate of consistency at an absolute park position out of the vision of the operator.

Abstract: A pair of wiper blades on a vehicle window are oscillated in opposing movement from an overlapping inner wipe arrangement, with upper and lower overlapped blades, outward to separated outer wipe positions and inward to the overlapping inner wipe arrangement with the positions of the blades reversed. Since the upper blade on the way out becomes the lower blade on the way back, it does not need to pause in its outer wipe position and it thus does not need to be subjected to a large acceleration in maintaining fast wipe cycles on large vehicle windshields. This reduces stress on the arm and blade and blade end whip.

Abstract: A pair of wiper blades on a vehicle window are oscillated in opposing movement between an overlapping inner wipe arrangement, in which one of the blades overlaps the other, and separated outer wiper positions. In dynamic symmetrical overlap (DSOL) operation, the first blade during each cycle to reach its outer wipe position is brought back first to be overlapped by the other for the start of the next cycle. This will normally produce alternating symmetrical overlap (ASOL) operation with its advantages of lower maximum blade acceleration and stress, since the overlapping blade precedes the other on the way out. However, if the leading blade is occasionally slowed, the other blade will not be forced to wait in its outer wipe position; and the cycle time will be minimized.

Abstract: A circuit for controlling three modes of operation of a multiple terminal load using a single positive DC voltage 12, simple circuitry, two relays 26, 30 and a single input control line 17. The circuit senses a switch 16, or logic device generating three conditions: open circuit, connection to positive voltage or connection to ground. Three operating modes are effected while minimizing the number of wires needed to control the multiple terminal load.

Abstract: A windshield wiper system for continuously controlling position and velocity of a wiper blade as it sweeps across the windshield. The blade is coupled directly to a motor having an encoder for continuously generating actual position pulses related to blade movement across the windshield. Desired position pulses are continuously generated which are related to desired blade position during the sweep. Both desired and actual position pulses are accumulated or counted such that desired and actual blade position are continuously known during the sweep. An error signal is generated by comparing accumulated desired and actual position pulses. Motor speed is corrected in response to the error signal for continuously correcting blade position and velocity.

Abstract: Disclosed is an electric motor system for automobiles having an electric motor and a control circuit for the motor, wherein the control circuit is attached to a part of a metallic housing of the motor system by means of a bonding agent and is embedded in resin material so as to maintain a favorable heat removal from the control circuit by virtue of a high heat conductivity and a heat radiation capability of the housing. Preferably, the housing accommodates a speed reduction unit which is connected to the output shaft of the motor and reduces its rotation speed. Favorable heat removal from the control circuit improves the reliability and the performance of the control circuit, and since the control circuit can be directly wired to the motor the number and the cross section of the electric wires which extend between various parts of the motor system can be reduced.

Abstract: This invention relates to a switch for energizing an electric motor of a wiper system from a voltage source, which motor has a switching member to be changed over in several modes of continuous operation as well as in a mode of intermittment operation. The switching member has two bridging contacts of which the first one co-operates with stationary contacts on a first contact path and the second one with stationary contacts on a second contact path. Thereby in at least one switching position a further mode of operation of the wiper system may be switched on via the second bridging contact and the stationary contacts of the associated second contact path in addition to intermittent operation. The switch has thus a high operational reliability, because there is little risk for a simultaneous failure of a stationary contact associated to the same mode of operation on both contact paths.

Abstract: A control apparatus and method for an electric motor having sensing devices which sense the frequency and polarity of EMFs in the rotor windings down to a condition where the rotor is in condition for reversing, and causing reversing of the motor when the frequency is such as to allow reversing and the polarits of a selected winding is at or near a zero crossing between positive and negative polarities. Cyclical reversal is effected by measuring the time the rotor takes to coast from a "power off" condition to the condition for reversing and with an electronically commutated motor reversing can usually be effected in one commutation period. The motor is used in a clothes washing machine or similar application where rapid reversal is required or timing of the time from one reversal to the next is required to be constant.

Abstract: In a vehicle windshield washer and wiper apparatus, the closure of a washer switch activates the washer and wiper and charges a capacitor to a first voltage. When the washer switch is released, the washer is deactivated but the wiper is activated through several more wipe cycles while the capacitor is discharging to a second voltage. The final wipe cycle and wiper parking is to be controlled by a wiper position responsive switch which is closed throughout the wipe pattern except for a speed predetermined angle, the beginning of which defines a desired park position. The improvement of the invention establishes the major discharge path for the capacitor through the wiper position responsive switch to greatly decrease the chance of the capacitor reaching the second voltage while the wiper position responsive switch is open and thereby more consistently park the wiper under the control of the wiper responsive switch in the desired park position.

Abstract: A wiper apparatus using a three brush, permanent magnet motor in which a zener diode has a cathode connected to the low speed brush and an anode connected to the high speed brush. The zener breakdown voltage of the zener diode is chosen so that it reverse conducts during at least some portion of each wipe cycle during operation with the high speed brush on a wet window to limit peak wiper speeds and reduce strain on the wiper mechanism. Variations including a transistor, relay or additional zener diode controlled by the zener diode and connected in parallel therewith provide for reduced current and therefore power dissipation in the zener diode at the expense of somewhat limited speed limiting.

Abstract: A vehicle windshield wiper control circuit in which the first wipe cycle is initiated with closure of the wiper activation switch in intermittent operation. The control circuit uses a voltage comparison arrangement in which a voltage divider, with an instant wipe capacitor connected across the output, has a normal output voltage ineffective to produce motor drive for wiper actuation but produces a different output voltage through electric current diversion from one of its series resistors with the wiper activation switch open which is effective, immediately upon closure of the wiper activating switch, to initiate a wipe cycle, the instant wipe capacitor thereafter charging to the normal output voltage before another wipe cycle can be initiated.

Abstract: A vehicle window wiper control activates an electric motor to drive the wiper through repeating cycles of a wipe pattern on a vehicle window. In the pause mode, a first wiper position responsive switch provides a pause at both inner and outer wipe positions, one at each end of the wipe pattern. In the off mode, however, the final wipe cycle is completed through a second wiper position responsive switch which is open only in the inner wipe position and is connected in parallel with the first wiper position responsive switch to shunt it at the outer wipe position, so that the wiper is parked only in the inner wipe position. The wiper position responsive switches are multiple stationary contacts tracing circular paths of differing radii on a conducting plate with non-conducting portions which rotates with wiper movement. The division of total pause time into two pauses per wipe cycle allows a halving of the RC time constant in the pause timer, with cost and/or reliability benefits.

Abstract: A wiper arrangement for motor vehicles with a wiper arm that rests on the surface to be cleaned with an abutment force dependent on the vehicle velocity; the wiper arm thereby rests on the surface to be cleaned during non-wiper operation with a decreased abutment force compared to wiper operation and during a washing operation with an increased abutment force compared to wiper operation.

Abstract: The control device comprises a manually operable switch and a system for controlling the stopping of the motor in a fixed position corresponding to a parking position of a windshield wiper. The system comprises an electrical circuit with at least one sliding contact intended to interact with at least one track having electrically conductive and isolating sectors, a relative rotary movement between the sliding contact and the track being controlled by the motor. One of the elements formed by the sliding contact and the track is intended to be connected to the supply terminal of the motor armature, while the other such element can be grounded during the rotary movement. Said one element is connected to the supply terminal of the motor by means of electrical breaker designed to remain open when the wiper motor is operating normally and close when the manual switch is actuated to control the stopping of the motor.

Abstract: A wiper control apparatus includes a main relay switch for passing the voltage received from a power supply to make the wiper control apparatus operable, an ignition switch for passing the voltage from the power supply to make the vehicle operable, and control means for controlling the ON/OFF operation of the main relay switch. The control means operates in response to the conductive state of the ignition switch to render the main relay switch conductive. After a predetermined time in response to a cut-off state of the ignition switch, the control means renders the main relay switch non-conductive. The predetermined time allows the wiper blade to move down to a predetermined park position of a windshield after the ignition switch is turned off.

Abstract: A windshield wiper system includes two windshield wipers of which each is mounted on a separate wiper shaft and may be driven to and fro by a separate motor between an inner reversing position and an outer reversing position, which windshield wipers are at least partially superposed in their inner reversing position and rotate in opposite directions through one wiping cycle. The two windshield wipers are moved without collision even though they wipe an overlapping area. The first windshield wiper is driven by its associated motor with a greater angular velocity of the output shaft than the second windshield wiper is driven by its motor. In addition the first windshield wiper is stopped for a predetermined time in its inner reversing position between two wiping cycles.

Abstract: A wiper control system having a timing circuit for operating the wiper a predetermined time after the operation of the liquid spray pump commences operation and continues a predetermined time after the liquid spray pump stops. The system operates the wiper at high speed in the washer mode and in one embodiment changes to high speed and in another embodiment changes to low speed upon operation of the wiper to the off mode.

Abstract: The invention relates to driving mechanism for wiper blades of, for example, motor vehicles wherein two motors (14, 15) impart to the wiper arm, or to at least one of its elements, not only an oscillating, but also a translational (radial) movement. The oscillating movement is imparted to the wiper arm by means of a drive shaft (12) actuated by a first motor (14) and the radial movement is imparted to the wiper arm by means of the drive shaft (13) of a second motor (15) and by means of a conical gear (9a, 9b) associated with a screw/nut system (8, 7) wherein the nut (7) moves radially when the drive shaft (13) of the second motor (15) is rotating. The two movements of the wiper arm are controlled and regulated by an opto-electronical system comprising two slotted discs (14a, 15a), two reading heads (14b, 15b) and a micro-processor (19). Several embodiments of the invention are possible.

Abstract: A drive circuit is provided for a bidirectional DC inductive motor, as may be used for automotive window wipers and the like. Four power MOSFETS are connected in an H-bridge configuration with the motor and a DC source. A pair of input terminals receives respective direction-controlling logic signals. Respective intermediate switching circuits are connected between each input terminal and the high-side and low-side power MOSFETS connected to the same motor terminal for controlling those two power MOSFETS in a complementary manner. A braking signal may also be applied to the input terminals. A third terminal receives a pulse-width modulated control signal and extends it, via appropriate circuitry, to an appropriate one of the low-side power MOSFETS for speed regulation. The values of certain components of the drive circuitry are selected to minimize cross-conduction between certain power MOSFETS and to optimally accommodate the inductive effects of the motor and leads.

Abstract: A windshield wiper system for motor vehicles includes an electric motor which drives at least one wiper during normal wiper operation, too and fro between two reversing positions within a wiping area. When the wiper system has been switched off by means of an operating switch, the wiper is moved to a concealed parking position outside the wiping area. Upon switching on of the wiper system and during normal operation the motor runs in one direction of rotation, but for moving the wipers into the parking position the motor runs in the other direction of rotation. A position switch is changed over by a switching member coupled with a rotating drive member of the electric motor. The position switch, after the operating switch has been switched off, releases a signal for reversing the polarity and in the parking position releases a signal for switching off the electric motor.

Abstract: This concealed wiper system comprises a wiper motor (1) having a mechanism to house the wiper arm in the retracted position by reversing rotation of the wiper motor; an oscillator (50) in which the oscillation frequency is varied by means of a variable resistor (59) installed within the automobile compartment; a wiper actuation switch (3) for wiper actuation selection; a wiper motor-position detector (2) for detecting wiper motor output shaft position; a wiper motor drive circuit (6) for driving the wiper motor; and an intermittent actuation control device employing a microcomputer (5).Intermittent actuation is selected by means of said wiper actuation switch (3), the intermittent pause period is based upon signals from said wiper motor-position detector (2) and signals from said means of oscillation (50), said wiper motor drive circuit (6) is controlled by the microcomputer (5).

Abstract: A concealed wiper system comprises a wiper motor (1) having a mechanism to house a wiper arm in a retracted stop position by means of the reverse rotation of the wiper motor;a wiper actuation switch (3) with output capability which consists of a two-bit selection signal output from the selected switch positon;a wiper motor position detector (2) which detects data on wiper motor output shaft position, said detector output capability consisting of a two bit position signal determined by the position of said output shaft;a control means (4) consisting of a microcomputer which operates based upon said selection signals and position signals, said microcomputer also outputs both normal and reverse rotation signals; anda wiper motor drive circuit (6) which actuates said wiper motor in both normal and reverse rotation by means of signals from said control means.

Abstract: A control for an electrically powered, motor vehicle windshield wiper system with independent drive motors for the wiper blades which produces an opposing wiper pattern with overlapping park and which is simple and inexpensive to manufacture by providing a unique switching system which coordinates the blades to prevent interference therebetween and converts simply and effectively, when the system is turned off, to a blade parking control which allows continuation of normal blade movement into a predetermined park position. The control provides switch control for the motor of each wiper blade in response to certain predetermined positions of the other blade, including, in particular, a position adjacent but outside the wipe pattern of the other blade wherein the controlled blade may be stopped if necessary to avoid interference.

Abstract: A window wiper control system provides accurate regulation and/or profiling of wiper speed. A desired interval corresponding with the preselected speed or speed profile is stored; a reference signal is provided to indicate a reference position of the wiper and is used to measure the actual interval of a wiper stroke or cycle. The actual interval is compared with the desired interval and an appropriate adjustment is made in a pulse-width modulation signal for effecting a desired speed and interval. The pulse-width modulation signal preferably has a relatively-low repetition rate. The wiper speed may be profiled to include acceleration and deceleration, and the intervals of acceleration and deceleration may be lengthened substantially to provide an apparent dwell.

Abstract: An automatic device for actuation of components for cleaning motor vehicle glass which includes a system for detection of the dirtiness of the glass, made up of a measuring photosensitive element receiving light directly through the glass and a reference photosensitive element isolated from any direct light and influenced only by the light transmitted through the interior of the glassing and an electronic circuit to receive and compare the responses of the two photosensitive elements and means to control the cleaning components automatically when the difference is response of these elements exceeds a certain threshold.

Abstract: A motor control circuit comprising a switching circuit which controls the supply of power from a source thereof to a motor responsive to a control signal, and a speed control circuit which generates the control signal. The speed control circuit can vary the motor speed cyclically, operating as an stable multi-vibrator. An overload protection circuit detects the occurrence of a current overload condition and either reduces to a low level the power delivered to the motor or inhibits the switching circuit's operation altogether.

Abstract: Method and apparatus for controlling the intermittent speed of a windshield wiper. A multi-speed motor for operating the windshield wiper is adapted to react to a change in drag of the wiper to automatically switch the motor to a different intermittent rate according to the load condition that exists.

Abstract: In a circuit arrangement for a reversible electric motor for directly driving a windshield wiper the motor is operated at reduced rotational speed in predetermined angular ranges to ensure smooth starting and stopping in the reversing positions and an accurate parking position.

Abstract: A device for detecting the presence of water includes a capacitance sensor coupled to a windshield to detect capacitance changes. A multivibrator is coupled to the sensor to translate the detected capacitance change to the frequency domain. A phase-locked loop coupled to the multivibrator produces a phase pulse in response to water causing a change in capacitance and, in turn, a change in the frequency of the multivibrator.

Abstract: A wiper driving apparatus comprises a speed reduction gear train mounted on a drive shaft of a motor which drives reciprocally and pivotally a wiper blade; a pin member operatively engaged with said gear train so as to move once every rotation of the gear train; a relay switch driven by a relay coil and including a moving contact and fixed contacts disposed opposite sides of the movable contact; an operating lever member for transmitting the movement of the pin member to the movable contact of the relay switch and retaining contact of the movable contact with one of the fixed contacts; and a control circuit including the relay switch and the operating lever member for controlling the driving, intermittent, and automatic stop operations of the wiper blade.

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 control method performed in response to the occurrence of an abnormal sensor output during the operation of monitoring the output signal of a sensor and controlling the operation of an automobile device such as a wiper. A microcomputer detects the presence or absence of an abnormal value of the sensor output signal converted to digital form so that when the abnormal value is detected, the operation of the automobile device is selectively controlled in accordance with an engine operating condition indicative signal applied to the microcomputer.

Abstract: A windshield wiper assembly comprising two windshield wipers each driven by a separate motor is described in which a control provides switching signals for switching on and off the wiper motors so as to achieve relatively smooth running of the wipers. In particular wiping areas one motor is continuously switched on and only the other motor, in dependence on the difference of the angular positions of the two wipers, is controlled such that collision of the wipers is prevented when the wiping areas overlap.

Abstract: A stop-position controlling device for an electric windshield wiper is disclosed, which comprises an oscillation means for a wiper blade and a switch mechanism provide with armature shortcircuiting contacts for forcedly stopping the wiper blade at a predetermined position under a turn-off state of a wiper switch. In this device, the armature shortcircuiting contacts are shifted at plural positions for forcedly stopping the wiper motor at different positions and a turnover means is further arranged therefor, or a contact moving means is disposed for displacing the armature shortcircuiting contacts to plural positions.

Abstract: A windshield cleaner control for a vehicle in which signals from separate washer and wiper actuating switches in the vehicle passenger compartment are voltage multiplexed on a single electric conductor through the firewall to washer and wiper actuating circuitry in the vehicle passenger compartment. A wiper actuating path is established including, in series, a source of electric power, a wiper motor actuating coil relay, the park switch and the washer motor, the internal impedance of the actuating coil being sufficiently greater than that of the washer motor that the latter is not activated by current flow through the former. The parallel wiper and washer switches are connected in series between the source of electric power and the electric conductor, park switch and washer motor, but a resistor in series with the wiper switch similarly prevents activation of the washer motor by the wiper switch.

Abstract: In an automotive windshield wiper control system, a rain sensor provides a rain condition-indicative signal useful in controlling the wiper in its intermittent operation mode. That signal is integrated to yield a value representing rain accumulation on the windshield, and when the integrated value exceeds a given threshold, the wiper is reciprocated once to clear the windshield. In order to prevent arhythmic wiper operation, the signal integrator is disabled during wiper operation so that the integrated value will not approach the threshold too soon after or even before the end of the preceding wiper operation cycle.

Abstract: Contact wear and damage to circular tracks of an end of travel stop arrangement for electric windshield wipers is minimized by the configuration and orientation of the contact. The contact takes the form of a bent end of a contact arm which engages the track with an elongated end edge that extends at an angle greater than zero and less than 90.degree. to the transverse or radial centerline of an insulating sector between ends of a conductive track. The so-angled contact edge slides easily over the junction between conducting and insulating sectors of the track.

Abstract: A method and apparatus for controlling the feed speed of a machine in a numerical control system having a manual pulse generator for generating pulses in response to a manual operation. The numerical control system numerically controls the machine by supplying the machine with the generated pulses as feed pulses in a manual feed mode and with feed pulses corresponding to a commanded feed speed in modes other than the manual feed mode. The commanded feed speed is modified in accordance with an override quantity stored in a register. The method includes selectively designating the modes other than the manual feed mode, changing the override quantity, which is stored in the register, based on the pulses generated by the manual pulse generator and in accordance with the designated mode, and modifying the commanded feed speed in accordance with the override quantity stored in the register.

Abstract: A drive motor for each loom is selectively connected to a given commercial frequency power source for high speed rotation at normal running of the loom and to a low frequency power unit for low speed rotation at inching operation, thereby assuring accurate inching operation with cheap cost on looms under mass drive condition.

Abstract: There is provided an electrical inching control for inching a drive system comprising a grinding mill driven by one or more three phase synchronous motors. The electric inching control includes an inching power bus and contactors or the solid state equivalent thereof. The inching bus supplies energy for the stator windings of the synchronous motors. The contactors or switches connect the positive and negative sides of a direct current power supply to the different phases of the stator windings in a sequence which provides a stepped rotating magnetic field, and the rotor field windings are excited with direct current. The interacting stator and rotor fields causes a rotation of the rotor a predetermined amount with each step causing the mill also to rotate a respective predetermined amount.

Abstract: The condition of a surface is sensed by cyclically moving two members having engaged surfaces relative to each other, driving the surfaces for only a portion of each cycle to set up a threshold kinetic energy level in accordance with the friction between the engaged surfaces, sensing the kinetic energy developed in one of the members due to moving the members relative to each other, comparing the developed kinetic energy with the threshold kinetic energy and controlling the cyclic movement of the members in accordance with the relationship between the kinetic energy threshold and the developed kinetic energy. The cyclic movement of the members is then used to provide a visual indication of the condition of one of the surfaces.

Abstract: A windshield wiper control system has operations controlled by single touch actuators. A first such actuator provides for initiation of wiper operation in low speed with the first actuation and alternate high and low speed operation with additional actuations. A second such actuator stops wiper operation and, if actuated while the wiper is not running, initiates a single wipe of the wiper. A further actuator may be provided for initiation of either programmed or operator controlled wash operation, depending on the length of actuation. A final actuator may be provided for two touch intermittent wiper operation, in which the operator sets the delay time by two consecutive touches. Variations are described for either depressed park or non-depressed park systems.