DE3940006C2 - - Google Patents

Info

Publication number
DE3940006C2
DE3940006C2 DE19893940006 DE3940006A DE3940006C2 DE 3940006 C2 DE3940006 C2 DE 3940006C2 DE 19893940006 DE19893940006 DE 19893940006 DE 3940006 A DE3940006 A DE 3940006A DE 3940006 C2 DE3940006 C2 DE 3940006C2
Authority
DE
Germany
Prior art keywords
waveguide
light output
change
alarm
alarm system
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 - Lifetime
Application number
DE19893940006
Other languages
German (de)
English (en)
Other versions
DE3940006A1 (de
Inventor
Bernd 6238 Hofheim De Scherer
Norbert 6200 Wiesbaden De Schaaf
Uwe 6384 Schmitten De Bernecker
Peter Prof. Dr. 8014 Neubiberg De Fasshauer
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
Priority claimed from DE8900756U external-priority patent/DE8900756U1/de
Application filed by Individual filed Critical Individual
Priority to DE19893940006 priority Critical patent/DE3940006A1/de
Publication of DE3940006A1 publication Critical patent/DE3940006A1/de
Application granted granted Critical
Publication of DE3940006C2 publication Critical patent/DE3940006C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/186—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using light guides, e.g. optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
DE19893940006 1989-01-24 1989-12-02 Verfahren und optische alarmanlage zur ueberwachung von zu sichernden objekten Granted DE3940006A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893940006 DE3940006A1 (de) 1989-01-24 1989-12-02 Verfahren und optische alarmanlage zur ueberwachung von zu sichernden objekten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8900756U DE8900756U1 (de) 1989-01-24 1989-01-24 Optische Alarmeinrichtung mit Lichtwellenleiter
DE19893940006 DE3940006A1 (de) 1989-01-24 1989-12-02 Verfahren und optische alarmanlage zur ueberwachung von zu sichernden objekten

Publications (2)

Publication Number Publication Date
DE3940006A1 DE3940006A1 (de) 1990-08-02
DE3940006C2 true DE3940006C2 (https=) 1992-08-06

Family

ID=25887634

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893940006 Granted DE3940006A1 (de) 1989-01-24 1989-12-02 Verfahren und optische alarmanlage zur ueberwachung von zu sichernden objekten

Country Status (1)

Country Link
DE (1) DE3940006A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039273A1 (de) * 2000-08-11 2002-02-21 Alcatel Sa System zur Zugangsüberwachung von Bauwerken

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9201667A (nl) * 1992-09-25 1994-04-18 Nl Spoorwegen Nv Stelsel voor het detecteren van treinen.
IT1392891B1 (it) * 2009-02-16 2012-04-02 Def Di R Doni Spa Dispositivo antifurto per pannelli solari o simili e del tipo a fibre ottiche
CN116400182B (zh) * 2023-06-05 2023-08-11 湖南金鑫信息科技有限公司 一种通信线缆检测设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH670009A5 (https=) * 1984-09-17 1989-04-28 Gebauer & Griller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039273A1 (de) * 2000-08-11 2002-02-21 Alcatel Sa System zur Zugangsüberwachung von Bauwerken

Also Published As

Publication number Publication date
DE3940006A1 (de) 1990-08-02

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee