EP0219466A3 - Improved apparatus for indicating the passage of an intruder across the boundary of a predetermined region - Google Patents

Improved apparatus for indicating the passage of an intruder across the boundary of a predetermined region Download PDF

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Publication number
EP0219466A3
EP0219466A3 EP86830277A EP86830277A EP0219466A3 EP 0219466 A3 EP0219466 A3 EP 0219466A3 EP 86830277 A EP86830277 A EP 86830277A EP 86830277 A EP86830277 A EP 86830277A EP 0219466 A3 EP0219466 A3 EP 0219466A3
Authority
EP
European Patent Office
Prior art keywords
tubes
boundary
passage
indicating
predetermined region
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Withdrawn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
EP86830277A
Other languages
German (de)
French (fr)
Other versions
EP0219466A2 (en
Inventor
Luigi Bianco
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.)
Elkron SpA
Original Assignee
Elkron SpA
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 Elkron SpA filed Critical Elkron SpA
Publication of EP0219466A2 publication Critical patent/EP0219466A2/en
Publication of EP0219466A3 publication Critical patent/EP0219466A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/20—Actuation by change of fluid pressure

Abstract

The alarm apparatus for indicating the passage of an in­ truder across the boundery of a predetermined region com­ prises at least one pair of yieldable fluid-filled tubes (2, 4) for burying side by side along the boundary of the region, a dia­ phragm-type, two-directional differential pressure transducer (8) connected to one end of each tube and arranged to output an electrical signal as a result of the deformation of the dia­ phragm means (16a, 16b) caused by a difference between the pressures in the two tubes, valve means (22) mounted in at least one bypass duct (18) of the transducer and arranged to put the two tubes suddenly into fluid communication when the difference between the pressures in the two tubes exceeds a predetermined threshold value, and capillary means (24) which put the two tubes into fluid communication and are interposed in the bypass duct hydraulically in parallel with the valve means.
EP86830277A 1985-10-04 1986-10-01 Improved apparatus for indicating the passage of an intruder across the boundary of a predetermined region Withdrawn EP0219466A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6784385 1985-10-04
IT67843/85A IT1182588B (en) 1985-10-04 1985-10-04 IMPROVED EQUIPMENT FOR SIGNALING THE PASSAGE OF AN INTRUDER THROUGH THE BORDER OF A PREDETERMINED REGION

Publications (2)

Publication Number Publication Date
EP0219466A2 EP0219466A2 (en) 1987-04-22
EP0219466A3 true EP0219466A3 (en) 1988-11-23

Family

ID=11305729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86830277A Withdrawn EP0219466A3 (en) 1985-10-04 1986-10-01 Improved apparatus for indicating the passage of an intruder across the boundary of a predetermined region

Country Status (2)

Country Link
EP (1) EP0219466A3 (en)
IT (1) IT1182588B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108332885A (en) * 2018-03-06 2018-07-27 中国航发哈尔滨东安发动机有限公司 A kind of monitoring of structures of power

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029062A (en) * 1978-08-24 1980-03-12 Italcontrol Srl Intruder detection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029062A (en) * 1978-08-24 1980-03-12 Italcontrol Srl Intruder detection

Also Published As

Publication number Publication date
EP0219466A2 (en) 1987-04-22
IT1182588B (en) 1987-10-05
IT8567843A0 (en) 1985-10-04

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Inventor name: BIANCO, LUIGI