FR2381364A1 - Burglar alarm system with two sensors - responds to change of force and to vibrations, and sensors deliver their signals to evaluation device (BE 16.8.78) - Google Patents

Burglar alarm system with two sensors - responds to change of force and to vibrations, and sensors deliver their signals to evaluation device (BE 16.8.78)

Info

Publication number
FR2381364A1
FR2381364A1 FR7804351A FR7804351A FR2381364A1 FR 2381364 A1 FR2381364 A1 FR 2381364A1 FR 7804351 A FR7804351 A FR 7804351A FR 7804351 A FR7804351 A FR 7804351A FR 2381364 A1 FR2381364 A1 FR 2381364A1
Authority
FR
France
Prior art keywords
sensors
signals
vibrations
burglar alarm
responds
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.)
Withdrawn
Application number
FR7804351A
Other languages
French (fr)
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.)
GRAAF JACOBUS DE
Original Assignee
GRAAF JACOBUS DE
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 GRAAF JACOBUS DE filed Critical GRAAF JACOBUS DE
Publication of FR2381364A1 publication Critical patent/FR2381364A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems

Abstract

The burglar alarm comprises a sun-shade, curtain, venetian blind etc., suspended on a support, with elements indicating their unwanted operation. The device has a sensor connected with the sun-shade and/or its support. It delivers a first output signal in accordance with changes of forces applied to the support. A second sensor delivers a second output signal in accordance with a contact with the shade causing its vibrations in a certain frequency range. The signals can be applied to an evaluation circuit which delivers a signal indicating a state of alarm when both signals appear simultaneously.
FR7804351A 1977-02-18 1978-02-16 Burglar alarm system with two sensors - responds to change of force and to vibrations, and sensors deliver their signals to evaluation device (BE 16.8.78) Withdrawn FR2381364A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7701795A NL7701795A (en) 1977-02-18 1977-02-18 BURGLARY PROTECTION.

Publications (1)

Publication Number Publication Date
FR2381364A1 true FR2381364A1 (en) 1978-09-15

Family

ID=19828008

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804351A Withdrawn FR2381364A1 (en) 1977-02-18 1978-02-16 Burglar alarm system with two sensors - responds to change of force and to vibrations, and sensors deliver their signals to evaluation device (BE 16.8.78)

Country Status (4)

Country Link
BE (1) BE864010A (en)
DE (1) DE2805001A1 (en)
FR (1) FR2381364A1 (en)
NL (1) NL7701795A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245682A2 (en) * 1986-05-07 1987-11-19 Alioth, Alexandra Control device for an electric-alarm apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218341A1 (en) * 1985-08-22 1987-04-15 Philip Young Alarm for a blind

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245682A2 (en) * 1986-05-07 1987-11-19 Alioth, Alexandra Control device for an electric-alarm apparatus
EP0245682A3 (en) * 1986-05-07 1989-03-08 Alioth, Alexandra Control device for an electric-alarm apparatus

Also Published As

Publication number Publication date
NL7701795A (en) 1978-08-22
BE864010A (en) 1978-08-16
DE2805001A1 (en) 1978-08-24

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Legal Events

Date Code Title Description
ST Notification of lapse