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DE68905567D1 - SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION. - Google Patents

SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION.

Info

Publication number
DE68905567D1
DE68905567D1 DE8989402891T DE68905567T DE68905567D1 DE 68905567 D1 DE68905567 D1 DE 68905567D1 DE 8989402891 T DE8989402891 T DE 8989402891T DE 68905567 T DE68905567 T DE 68905567T DE 68905567 D1 DE68905567 D1 DE 68905567D1
Authority
DE
Germany
Prior art keywords
alarm
security system
electrical transmission
signals
radio electrical
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 - Fee Related
Application number
DE8989402891T
Other languages
German (de)
Other versions
DE68905567T2 (en
Inventor
Jacques Duboys
Gerard Akenine
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.)
Cerberus Guinard
Original Assignee
Cerberus Guinard
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 Cerberus Guinard filed Critical Cerberus Guinard
Application granted granted Critical
Publication of DE68905567D1 publication Critical patent/DE68905567D1/en
Publication of DE68905567T2 publication Critical patent/DE68905567T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/16—Security signalling or alarm systems, e.g. redundant systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
  • Transceivers (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Fire Alarms (AREA)

Abstract

The proposed device consists in that, each transmitter (1) associated with an alarm detection device (2) comprises two devices (3) and (4) for transmitting the alarm signal in such a way as to transmit two alarm signals which are identical but separated in time by a certain period. On reception, an alarm is recognised not only when both signals are received, but also when a single signal is received. The coding of the two transmission devices into the alarm signals permits determination of the transmission device (3) or (4) which is defective. The proposed device is applicable to security systems. <IMAGE>
DE8989402891T 1988-10-25 1989-10-19 SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION. Expired - Fee Related DE68905567T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8813920A FR2638267B1 (en) 1988-10-25 1988-10-25 SAFETY SYSTEM WITH RADIOELECTRIC TRANSMISSION

Publications (2)

Publication Number Publication Date
DE68905567D1 true DE68905567D1 (en) 1993-04-29
DE68905567T2 DE68905567T2 (en) 1993-08-26

Family

ID=9371248

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8989402891T Expired - Fee Related DE68905567T2 (en) 1988-10-25 1989-10-19 SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION.

Country Status (4)

Country Link
EP (1) EP0366527B1 (en)
AT (1) ATE87385T1 (en)
DE (1) DE68905567T2 (en)
FR (1) FR2638267B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848231A (en) * 1970-12-31 1974-11-12 Baldwin Electronics Inc Alarm system utilizing pulse position modulation and dual conductor sensor
US3909722A (en) * 1973-06-22 1975-09-30 Jbh Electronic Systems Inc Variable frequency communication system
US4575712A (en) * 1984-02-27 1986-03-11 Pittway Corporation Communication system
US4665385A (en) * 1985-02-05 1987-05-12 Henderson Claude L Hazardous condition monitoring system

Also Published As

Publication number Publication date
DE68905567T2 (en) 1993-08-26
FR2638267B1 (en) 1990-12-21
ATE87385T1 (en) 1993-04-15
FR2638267A1 (en) 1990-04-27
EP0366527A1 (en) 1990-05-02
EP0366527B1 (en) 1993-03-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: BLUMBACH, KRAMER & PARTNER, 81245 MUENCHEN

8339 Ceased/non-payment of the annual fee