EP0232388A1 - Dispositif de securite - Google Patents

Dispositif de securite

Info

Publication number
EP0232388A1
EP0232388A1 EP19860905139 EP86905139A EP0232388A1 EP 0232388 A1 EP0232388 A1 EP 0232388A1 EP 19860905139 EP19860905139 EP 19860905139 EP 86905139 A EP86905139 A EP 86905139A EP 0232388 A1 EP0232388 A1 EP 0232388A1
Authority
EP
European Patent Office
Prior art keywords
panel
security apparatus
chamber
alarm
air chamber
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Withdrawn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
EP19860905139
Other languages
German (de)
English (en)
Inventor
Frederick William Millar
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
Application filed by Individual filed Critical Individual
Publication of EP0232388A1 publication Critical patent/EP0232388A1/fr
Withdrawn legal-status Critical Current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
    • G08B13/20—Actuation by change of fluid pressure
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass

Definitions

  • This invention relates to security apparatus and particularly to apparatus for providing an alarm signal when glass or other panels are interfered with or broken.
  • the present invention provides security apparatus comprising a transparent panel, means defining an air chamber extending across the panel, means to hold the interior of said chamber at non-atmospheric pressure, and alarm means responsive to a change in pressure in said air chamber to produce' an alarm signal, it being understood that as used herein the term "transparent panel” includes a partially transparent and or translucent panel.
  • the means defining the air chamber may define a tubular duct extending across the panel.
  • the 'duct may be formed by transparent tubing applied to a face of the panel. Alternatively it can be comprised of one or more holes formed in the body of the panel.
  • the panel may be comprised of two parallel transparent sheets and the air chamber may be defined between those sheets to extend continuously throughout a major part of the panel.
  • Figure 2 is a cross-section on the line 2-2 in Figure 1;
  • Figure 3 is a cross-section through a control unit forming part of the apparatus shown in Figures 1 and 2;
  • Figure 4 illustrates a modification incorporating a single glazed panel to which a vacuum tube is applied
  • Figure 5 illustrates a further modification in which a vacuum duct is formed within a glazed panel
  • Figure 6 illustrates a modified form of control unit.
  • the apparatus illustrated in Figure 1 comprises a panel 1 formed from double glazing glass sheets 2, 3 set in a frame 4. The edges of the sheets 2 and 3 are set in the frame and sealed with an adhesive strip (not shown) so as to produce within the panel a sealed air chamber 5 which extends continuously throughout substantially the whole area of the panel.
  • a small tube 6 is installed through the top of frame 4 to allow air to pass between the chamber* 5 and an alarm .
  • control unit 7 fitted to the upper side of the frame.
  • Alarm control unit 7 comprises a housing 8 which encloses a tubular chamber 9 closed by a diaphragm 10. Tube 6 connects air chamber 5 with the interior of the tubular chamber 9.
  • a switch 13 disposed within housing 8 has an actuator 14 in engagement with the diaphragm 10 so as to be " actuated by movement of the diaphragm. This switch is wired to an alarm 15 disposed within the housing and powered from a rechargeable battery 16.
  • Air can be pumped from the interior of the control unit via a suction fitting 17 provided with a non-return valve.
  • the air in chamber 9 and chamber 5 can then expand by movement of diaphragm 10 so that chambers 9 and 5 are also reduced to sub-atmospheric pressure, albeit to a lesser degree than that within the casing 8 of the control unit. This causes the diaphragm to set the switch so as to turn the alarm circuit on.
  • Figure 4 shows a modification in which a panel 21 formed of a single glass sheet has applied to it a small diameter tube 22 formed of glass or other transparent material.
  • the tube is adhered to a back face of the panel and it is connected via a tube 23 to an alarm control unit 24 which may be identical to the control unit 7 of the previous embodiment.
  • Tube 22 is extended across the panel in a zicr-zag path or formation so as to extend throughout a substantial area of the panel.
  • the interior of the tube is evacuated to sub-atmospheric pressure through the control unit. If the panel is broken or cut, the negative pressure within the tube is destroyed and the alarm will be activated.
  • Figure 5 illustrates a further embodiment in which a glass panel 31 is formed with a series of small tubular bores 32, 33.
  • the panel is set within a frame 34 and its outer edge engages a sealing strip (not shown) which may be formed of neoprene.
  • the bores 32, 33 then form limbs of a continuous chamber which extends across a substantial part of the panel.
  • This chamber is connected via a tapping 35 to a control unit 36 mounted on top of the panel frame.
  • Control unit 36 may be similar to the control unit of the previous embodiments.
  • the panel chamber is evacuated to sub-atmospheric pressure by the application of suction through the control unit and the alarm is activated when this negative pressure is destroyed on breakage or cutting of the panel.
  • FIG. 6 illustrates a modified control unit 7A which is generally similar to control unit 7 of Figure 3 and in which like components have been identified by like reference numerals but with the addition of the suffix "A".
  • the diaphragm chamber 9A is provided by a totally sealed casing 40 disposed within the outer casing 8 of the control unit and the tube 6 connects directly with the interior of casing 8.
  • suction applied to the interior of casing 8 via the suction fitting 17A is also applied directly to the air chamber extending across the panel. This enables a significant sub-atmospheric pressure to be generated in a relatively large volume and the modified control unit is particularly suited to apparatus for protection of large windows such as shop front windows.
  • Evacuator of casing 8 will cause diaphragm 10A to move and allow the fixed volume of air within chamber 9A to expand. This sets the switch i3A in an active or "on” condition and the alarm 15A will be activated by movement of diaphragm 10A consequent to a loss of vacuum due to interference with the panel being secured on to the casing of the control unit.
  • the illustrated apparatus has been advanced by way of example only and many variations are possible.
  • the diaphragm and switch actuator for the alarm could be replaced by a pressure transducer or other suitable device operating in an electronic circuit.
  • the invention enables provision of a simple and unobtrusive means for providing an alarm signal when glass or other panels are interfixed with or broken.
  • the invention may be applied to security for windows in domestic houses or any other buildings, shop front windows, glass fronted display cases and other glazed display fronts.

Abstract

Dispositif de sécurité destiné à produire une alarme lorsque l'on touche à un panneau en verre ou similaire (21). Une chambre à air (22) s'étendant à travers le panneau (21) est maintenue à une pression non atmosphérique, de préférence à une pression sub-atmosphérique, et une alarme (24) est sensible à toute variation de pression dans cette chambre lorsque l'on touche au panneau (21). La chambre à air peut être définie par un conduit tubulaire (22) s'étendant à travers le panneau. Le conduit (22) peut être formé d'un tube transparent appliqué sur une face du panneau (21) ou bien il peut être constitué d'orifices formés dans le corps du panneau. Dans une variante, le panneau est constitué de deux feuilles transparentes parallèles entre lesquelles est définie la chambre à air qui s'étend de manière continue sur toute une grande partie du panneau.
EP19860905139 1985-08-12 1986-08-08 Dispositif de securite Withdrawn EP0232388A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU189685 1985-08-12
AU1896/85 1985-08-12

Publications (1)

Publication Number Publication Date
EP0232388A1 true EP0232388A1 (fr) 1987-08-19

Family

ID=3692393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860905139 Withdrawn EP0232388A1 (fr) 1985-08-12 1986-08-08 Dispositif de securite

Country Status (2)

Country Link
EP (1) EP0232388A1 (fr)
WO (1) WO1987001228A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9978229B2 (en) 2014-03-31 2018-05-22 Glass Security Pte Ltd Tamper detection device and a method for installing the device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR645154A (fr) * 1927-12-05 1928-10-20 Appareil avertisseur de tentatives d'effraction et d'incendie
US1974779A (en) * 1931-10-23 1934-09-25 John M Lupold Burglar alarm
GB1108593A (en) * 1964-02-13 1968-04-03 Oasis Technical Invest Ltd Window and the combination thereof with alarm means
GB1125754A (en) * 1965-04-14 1968-08-28 Oasis Technical Invest Ltd Improvements relating to alarm apparatus
GB1208891A (en) * 1967-05-23 1970-10-14 Oasis Technical Invest Ltd Improvements relating to windows
GB1208892A (en) * 1967-05-23 1970-10-14 Oasis Technical Invest Ltd Alarm actuator apparatus
FR2250166A1 (en) * 1973-11-05 1975-05-30 Cogny Pierre Pressure sensitive security barrier - has tubes connected to sensor detecting change produced by compressor
DE2642203A1 (de) * 1976-09-20 1978-03-23 Winter Peter Diebstahlsicherheitsglas
GB2065945B (en) * 1979-07-02 1983-06-22 Millar F W Security apparatus
AU2479684A (en) * 1979-07-02 1984-07-05 Millar, F.W. Security container
US4350978A (en) * 1981-04-24 1982-09-21 Riccobono Paul J Humidity-sensitive broken panel alarm
EP0134476B1 (fr) * 1983-07-06 1987-10-14 Winfred Klink Dispositif de capteur sensible à la pression pour un transmetteur de signaux d'alarme

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8701228A1 *

Also Published As

Publication number Publication date
WO1987001228A1 (fr) 1987-02-26

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19870514