FR2264957A1 - Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations - Google Patents

Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations

Info

Publication number
FR2264957A1
FR2264957A1 FR7409524A FR7409524A FR2264957A1 FR 2264957 A1 FR2264957 A1 FR 2264957A1 FR 7409524 A FR7409524 A FR 7409524A FR 7409524 A FR7409524 A FR 7409524A FR 2264957 A1 FR2264957 A1 FR 2264957A1
Authority
FR
France
Prior art keywords
temp
variations
compensate
automobile
impedance
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.)
Granted
Application number
FR7409524A
Other languages
French (fr)
Other versions
FR2264957B1 (en
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.)
Central Glass Co Ltd
Original Assignee
Central Glass Co Ltd
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 Central Glass Co Ltd filed Critical Central Glass Co Ltd
Priority to FR7409524A priority Critical patent/FR2264957A1/en
Publication of FR2264957A1 publication Critical patent/FR2264957A1/en
Application granted granted Critical
Publication of FR2264957B1 publication Critical patent/FR2264957B1/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/12—Measures preventing the formation of condensed water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material

Abstract

The device is for windscreens or rear windows of automobiles and uses the impedance between two condensation detecting electrodes to actuate heating circuits the reliability of this system is increased by effecting the variation of impedance wrt ambient temperature. The device is designed to operate in conditions of persistent condensation formation with thermistors or semi-conductors used to detect temperature variation. The detectors are mounted in series with resistors of effect impedance variations. The detector circuit is connected to an oscillator through a capacitor and an a.c. is supplied at between 100 and 1000Hz.
FR7409524A 1974-03-20 1974-03-20 Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations Granted FR2264957A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7409524A FR2264957A1 (en) 1974-03-20 1974-03-20 Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7409524A FR2264957A1 (en) 1974-03-20 1974-03-20 Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations

Publications (2)

Publication Number Publication Date
FR2264957A1 true FR2264957A1 (en) 1975-10-17
FR2264957B1 FR2264957B1 (en) 1979-04-20

Family

ID=9136614

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7409524A Granted FR2264957A1 (en) 1974-03-20 1974-03-20 Anti-misting device for automobile - uses temp responsive elements to compensate for temp variations

Country Status (1)

Country Link
FR (1) FR2264957A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7331531B2 (en) 2003-09-11 2008-02-19 Preh Gmbh Condensation sensor
US7416331B2 (en) * 2003-09-11 2008-08-26 Preh Gmbh Condensation sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7331531B2 (en) 2003-09-11 2008-02-19 Preh Gmbh Condensation sensor
US7416331B2 (en) * 2003-09-11 2008-08-26 Preh Gmbh Condensation sensor

Also Published As

Publication number Publication date
FR2264957B1 (en) 1979-04-20

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Legal Events

Date Code Title Description
ST Notification of lapse