GB1382261A - Electrical operating circuits for windscreen wipers - Google Patents

Electrical operating circuits for windscreen wipers

Info

Publication number
GB1382261A
GB1382261A GB5168571A GB5168571A GB1382261A GB 1382261 A GB1382261 A GB 1382261A GB 5168571 A GB5168571 A GB 5168571A GB 5168571 A GB5168571 A GB 5168571A GB 1382261 A GB1382261 A GB 1382261A
Authority
GB
United Kingdom
Prior art keywords
contact
windscreen
thyristor
amplifier
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
GB5168571A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB5168571A priority Critical patent/GB1382261A/en
Publication of GB1382261A publication Critical patent/GB1382261A/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
    • B60S1/0825—Capacitive rain sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

1382261 Control of D.C. motors L SEYMOUR 26 Jan 1973 [6 Nov 1971] 51685/71 Heading H2J Intermittent operation, of the; windscreen wipers 4 of a vehicle is provided by the circuit shown, in which contacts 1, 2 are mounted'on the inside of the windscreen 3 which, when dry, produces a capacity value between the contacts to prevent signals applied to contact 1 being received by contact 2, the presence of water on the windscreen changing the capacity to produce at contact 2 a signal which is applied via a transistor amplifier 8, 10 to fire a thyristor 15 and so energize the wiper motor 16. Subsequent closure of the wiper-actuated switch 5 provides energization of the motor for one wiper cycle, removes the supply voltage from amplifier 8, 10 to isolate thyristor 15 from contact 2 and shunts the thyristor to cause it to turn off, further firing occurring when switch 5 opens if sufficient water is still present on the windscreen. Contact 1 may be fed with pulses from the vehicle ignition circuit or from a separate generator, suitable screening and filtering arrangements being provided. Protective diodes 12, 13, 14, 17 are provided for the thyristor 15 and the voltage supply to the amplifier, which supply may be regulated by a Zener diode to stabilize the amplifier current gain.
GB5168571A 1971-11-06 1971-11-06 Electrical operating circuits for windscreen wipers Expired GB1382261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5168571A GB1382261A (en) 1971-11-06 1971-11-06 Electrical operating circuits for windscreen wipers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5168571A GB1382261A (en) 1971-11-06 1971-11-06 Electrical operating circuits for windscreen wipers

Publications (1)

Publication Number Publication Date
GB1382261A true GB1382261A (en) 1975-01-29

Family

ID=10460995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5168571A Expired GB1382261A (en) 1971-11-06 1971-11-06 Electrical operating circuits for windscreen wipers

Country Status (1)

Country Link
GB (1) GB1382261A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495452A (en) * 1981-12-08 1985-01-22 Boegh Peterson Allan Windshield wiper control having a sensor and a repeatedly renewed offset signal
US4827198A (en) * 1988-02-09 1989-05-02 General Motors Corporation Vehicle windshield and wiper with rain sensor
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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495452A (en) * 1981-12-08 1985-01-22 Boegh Peterson Allan Windshield wiper control having a sensor and a repeatedly renewed offset signal
US4827198A (en) * 1988-02-09 1989-05-02 General Motors Corporation Vehicle windshield and wiper with rain sensor
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

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee