GB1321221A - Automatic window wipers and demisters - Google Patents

Automatic window wipers and demisters

Info

Publication number
GB1321221A
GB1321221A GB1321221DA GB1321221A GB 1321221 A GB1321221 A GB 1321221A GB 1321221D A GB1321221D A GB 1321221DA GB 1321221 A GB1321221 A GB 1321221A
Authority
GB
United Kingdom
Prior art keywords
moisture
heater
voltage
atmospheric temperature
wiper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SPENCE GM
Original Assignee
SPENCE GM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SPENCE GM filed Critical SPENCE GM
Publication of GB1321221A publication Critical patent/GB1321221A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
    • B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
    • B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
    • B60S1/0851—Resistive rain sensor

Abstract

1321221 Windscreen wipers G M SPENCE 23 June 1970 [7 May 1969] 23187/69 Heading A4F [Also in Divisions G1 and H2] A window wiper or demister for a vehicle window, windscreen or headlamp lens is provided with a moisture detector adapted to provide an electrical signal denoting the moisture content of a sensing region, control means responsive to said signal for operating a wiper or demister mechanism, further control means responsive to the signal to energize an electrical heater for the sensing region, and means responsive to atmospheric temperature for reducing the energization of the heater as the atmospheric temperature falls. The moisture detector 10 comprises a ceramic plate 11 having a one face two inter-digitated electrodes 12, 13, the conductance between which varies in accordance with the moisture between them. For evaporating such moisture a heating resistor 14 is provided in the reverse side of the plate 11. An alternating output from a multi-vibrator 15 is applied to the electrode 12 to provide a voltage about mid-point of a voltage divider 18, 19 dependent upon the moisture between the electrodes 12, 13. This voltage is amplified and rectified and applied to the base of a transistor 26 so that the voltage between its emitter and the negative line 22 represents the moisture between the electrodes 12, 13. When this voltage exceeds a first value a transistor 30 is rendered conducting, and when it exceeds a higher second value a transistor 31 is rendered conducting to energize relay coils 32, 33, respectively, for low and high speed operation of the wiper motor 40. The current through the heater is controlled by circuitry including transistors 49, 50, 52 and 58, and a potential divider including resistors 54, 55 and 56 and a thermistor 57. Wide variation of atmospheric temperature the thermistor 57 alters the output of the potential divider so that the current through the heater 14 falls as the atmospheric temperature rises. A switch 32c is operated by the relay coil 32 to short circuit the resistor 54 to increase the current through the heater 14 when the wiper, mechanism is in operation. Demister mechanism controlled by a moisture detector and similar circuitry is also described.
GB1321221D 1969-05-07 1969-05-07 Automatic window wipers and demisters Expired GB1321221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2318769 1969-05-07

Publications (1)

Publication Number Publication Date
GB1321221A true GB1321221A (en) 1973-06-27

Family

ID=10191564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1321221D Expired GB1321221A (en) 1969-05-07 1969-05-07 Automatic window wipers and demisters

Country Status (1)

Country Link
GB (1) GB1321221A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032745A (en) * 1974-04-19 1977-06-28 Saint-Gobain Industries Control system for vehicle window heater
US4317073A (en) * 1977-02-03 1982-02-23 Henry Blaszkowski Windshield wiper control system
FR2557725A1 (en) * 1984-01-03 1985-07-05 Tonny Stempniakowski Windscreen wiper automatic contactor.
US4859867A (en) * 1988-04-19 1989-08-22 Donnelly Corporation Windshield moisture sensing control circuit
US4871917A (en) * 1988-04-19 1989-10-03 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US4916374A (en) * 1989-02-28 1990-04-10 Donnelly Corporation Continuously adaptive moisture sensor system for wiper control
US4956591A (en) * 1989-02-28 1990-09-11 Donnelly Corporation Control for a moisture sensor
US4973844A (en) * 1989-07-10 1990-11-27 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
DE102014102089A1 (en) * 2014-02-19 2015-08-20 Hella Kgaa Hueck & Co. Printed circuit board for a light module of a vehicle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032745A (en) * 1974-04-19 1977-06-28 Saint-Gobain Industries Control system for vehicle window heater
US4317073A (en) * 1977-02-03 1982-02-23 Henry Blaszkowski Windshield wiper control system
FR2557725A1 (en) * 1984-01-03 1985-07-05 Tonny Stempniakowski Windscreen wiper automatic contactor.
US4859867A (en) * 1988-04-19 1989-08-22 Donnelly Corporation Windshield moisture sensing control circuit
US4871917A (en) * 1988-04-19 1989-10-03 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US4916374A (en) * 1989-02-28 1990-04-10 Donnelly Corporation Continuously adaptive moisture sensor system for wiper control
US4956591A (en) * 1989-02-28 1990-09-11 Donnelly Corporation Control for a moisture sensor
US4973844A (en) * 1989-07-10 1990-11-27 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
DE102014102089A1 (en) * 2014-02-19 2015-08-20 Hella Kgaa Hueck & Co. Printed circuit board for a light module of a vehicle

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees