EP0520222A3 - Capacitive field changing sensor - Google Patents

Capacitive field changing sensor Download PDF

Info

Publication number
EP0520222A3
EP0520222A3 EP19920109488 EP92109488A EP0520222A3 EP 0520222 A3 EP0520222 A3 EP 0520222A3 EP 19920109488 EP19920109488 EP 19920109488 EP 92109488 A EP92109488 A EP 92109488A EP 0520222 A3 EP0520222 A3 EP 0520222A3
Authority
EP
European Patent Office
Prior art keywords
field changing
changing sensor
capacitive field
capacitive
sensor
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.)
Ceased
Application number
EP19920109488
Other languages
German (de)
English (en)
Other versions
EP0520222A2 (de
Inventor
Bernhard Dr. Dipl.-Phys. Hering
Konrad Kraus
Harald Dipl.-Ing. Schermann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0520222A2 publication Critical patent/EP0520222A2/de
Publication of EP0520222A3 publication Critical patent/EP0520222A3/de
Ceased 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
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP19920109488 1991-06-26 1992-06-04 Capacitive field changing sensor Ceased EP0520222A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4121110 1991-06-26
DE19914121110 DE4121110C1 (OSRAM) 1991-06-26 1991-06-26

Publications (2)

Publication Number Publication Date
EP0520222A2 EP0520222A2 (de) 1992-12-30
EP0520222A3 true EP0520222A3 (en) 1993-02-03

Family

ID=6434793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920109488 Ceased EP0520222A3 (en) 1991-06-26 1992-06-04 Capacitive field changing sensor

Country Status (2)

Country Link
EP (1) EP0520222A3 (OSRAM)
DE (1) DE4121110C1 (OSRAM)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2040524A (en) * 1979-12-04 1980-08-28 Lawrence Security Services Ltd Alarm System
FR2450464A1 (fr) * 1979-03-02 1980-09-26 Anvar Detecteur de proximite pour la realisation de dispositifs de protection des lieux et des biens contre les intrusions, et de dispositifs de comptage
WO1990010280A1 (en) * 1989-03-01 1990-09-07 Marconi Electronic Devices Limited Electronic monitoring arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839806A1 (de) * 1978-09-13 1980-03-27 Ristow Kg Dr Alfred Diebstahlsicherung
US4293852A (en) * 1978-12-08 1981-10-06 Lawrence Security Services Ltd. Capacitive article removal alarm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450464A1 (fr) * 1979-03-02 1980-09-26 Anvar Detecteur de proximite pour la realisation de dispositifs de protection des lieux et des biens contre les intrusions, et de dispositifs de comptage
GB2040524A (en) * 1979-12-04 1980-08-28 Lawrence Security Services Ltd Alarm System
WO1990010280A1 (en) * 1989-03-01 1990-09-07 Marconi Electronic Devices Limited Electronic monitoring arrangement

Also Published As

Publication number Publication date
EP0520222A2 (de) 1992-12-30
DE4121110C1 (OSRAM) 1992-11-05

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