EP0568137A1 - Structure de montage pour appareil électrique avec dispositif indicateur de son déplacement - Google Patents

Structure de montage pour appareil électrique avec dispositif indicateur de son déplacement Download PDF

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Publication number
EP0568137A1
EP0568137A1 EP93201118A EP93201118A EP0568137A1 EP 0568137 A1 EP0568137 A1 EP 0568137A1 EP 93201118 A EP93201118 A EP 93201118A EP 93201118 A EP93201118 A EP 93201118A EP 0568137 A1 EP0568137 A1 EP 0568137A1
Authority
EP
European Patent Office
Prior art keywords
box
insert
mounting structure
members
reeds
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.)
Granted
Application number
EP93201118A
Other languages
German (de)
English (en)
Other versions
EP0568137B1 (fr
Inventor
Antonio Aldizio
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.)
BTicino SpA
Original Assignee
BTicino 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 BTicino SpA filed Critical BTicino SpA
Publication of EP0568137A1 publication Critical patent/EP0568137A1/fr
Application granted granted Critical
Publication of EP0568137B1 publication Critical patent/EP0568137B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/149—Mechanical actuation by lifting or attempted removal of hand-portable articles with electric, magnetic, capacitive switch actuation
    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits

Definitions

  • This invention relates to electric systems, and particularly to a structure for mounting an electrical apparatus inside a box, especially an apparatus equipped with a device for indicating removal of the apparatus from the box,
  • a commonly used expedient for indicating that electric apparatus housed in wall hung or set-in boxes have been tampered with provides electric components consisting of two discrete members coupled to each other whose electrical behavior is altered as the two members are moved away from each other.
  • a typical component of this type is the reed relay, wherein the two coupled members are a pair of ferromagnetic contacts and a permanent magnet.
  • the two coupled members are a pair of ferromagnetic contacts and a permanent magnet.
  • one of the members e.g. the permanent magnet, would be rigidly connected to an insert unreleasably attached to the box, and the other member to the electrical apparatus, in turn attached to the box in a removable fashion.
  • the reed relay is part of an indicator circuit, which may be the alarm circuit itself in which the electrical apparatus is connected in the instance of an intrusion-resisting system, and is connected such that the removal of the apparatus mounted in the box, and hence of the contact from the magnet, would result in an alarm being tripped upon the contact being opened or closed, depending on the reed relay type.
  • the member that is connected to the apparatus is usually located within the apparatus casing, close to the wall which locates opposite to the bottom of the box in which the apparatus is mounted.
  • the member that is connected to the box is attached to the latter either directly or through a specially provided support base, using screws, adhesives, or a strip of a double-sided adhesive material.
  • a group 10 of three modular construction electrical apparatus 11, 12 and 13 held together on a frame 14 is intended to be releasably fastened, such as by means of two screws 15, to the interior of a box 16 having a rectangular cross-sectional shape and being adapted to be set in a wall.
  • the frame 14 has lead-in walls 14a to facilitate alignment of the two parts.
  • One of the three apparatus may be an infrared detector of moving objects, and contains contacts (hidden from view in the drawing) of a reed relay on the bottom of its casing.
  • the permanent magnet for operating the reed relay, indicated at 17, is attached to an insert 18 adapted to be secured releasably on the box 16 interior.
  • the insert 18 comprises an elongate body 19 made of a non-magnetic material, e.g. a plastics molding, and having a recess wherein the magnet 17 is accommodated and held.
  • Two spring reeds 20, e.g. made of steel, are respectively attached to the ends of the body 19 by means of grooves 19a and interfitting formations 19b.
  • the free ends of the reeds 20 are each formed with two prongs 20a and are set apart a greater distance than the inside width dimension of the box 16.
  • Two tabs 21 are blanked out of the reeds 20 and suitably bent to locate at a spacing from one another smaller than the distance between the lower and upper sides of the apparatus 11. These sides have each a pair of parallel ribs 11a spaced apart to receive and guide the tabs 21.
  • the parts described above jointly define a mounting structure for mounting the group of electrical apparatus 10 inside the box 16, which is installed by first joining the insert 18 with the apparatus, as by forcing the latter in place between the tabs 21, and then fitting the group into the box 16 with the insert in place.
  • the group 10 will automatically align to the box by virtue of the lead-in walls 14a provided, and the insert 18 -- whose reeds 20 bend elastically inwards upon its introduction -- will also locate automatically in the box and retain its position relative to the apparatus 11.
  • the insert 18 is held unreleasably to the box by the prongs 20a engaging the opposed longitudinal walls of the box 15 under the spring bias from the reeds 20.
  • the insert 18 functions similar to an expansion anchor means.
  • the group 10 can be disassembled and reassembled without altering the mutual positioning of the insert and the apparatus.
  • the insert 18, although unreleasably secured from the operational standpoint may be easily taken, where required, out the box for use at another location in combination with the same or another apparatus, because of the expansion anchor-like arrangement relying on the comparatively modest spring bias provided by the reeds 20.
  • the mounting structure of this invention affords optimum positioning of the insert 18 and the apparatus 11 irrespective of the box depth.
  • a cylindrical box could be substituted for the rectangular box; the tabs 21 and corresponding ribs 11a could be replaced with some other guiding and fastening arrangement between the insert and the apparatus; instead of a reed relay, other components could be employed whose electrical characteristics be tied to the distance therebetween, such as a coil with a detachable ferromagnetic core, a separable plate capacitive element, a photoelectric coupler, a monostable microswitch, etc.. If required, moreover, terminals may be provided in the insert for any supply or connection lines to the portion of the electrical device housed therein.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Casings For Electric Apparatus (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP93201118A 1992-04-30 1993-04-17 Structure de montage pour appareil électrique avec dispositif indicateur de son déplacement Expired - Lifetime EP0568137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI921036 1992-04-30
ITMI921036A IT1255115B (it) 1992-04-30 1992-04-30 Struttura di montaggio di un apparecchio elettrico con dispositivo di segnalazione della rimozione dello stesso

Publications (2)

Publication Number Publication Date
EP0568137A1 true EP0568137A1 (fr) 1993-11-03
EP0568137B1 EP0568137B1 (fr) 1996-11-27

Family

ID=11363135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93201118A Expired - Lifetime EP0568137B1 (fr) 1992-04-30 1993-04-17 Structure de montage pour appareil électrique avec dispositif indicateur de son déplacement

Country Status (4)

Country Link
EP (1) EP0568137B1 (fr)
DE (1) DE69306158T2 (fr)
ES (1) ES2095558T3 (fr)
IT (1) IT1255115B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2412472A (en) * 2004-03-25 2005-09-28 Optex Co Ltd Tampering switch for security sensors
DE102005062492A1 (de) * 2005-12-27 2007-07-12 Albrecht Jung Gmbh & Co. Kg Elektrisches/elektronisches Installationsgerät
FR2930666A1 (fr) * 2008-04-29 2009-10-30 Radio Systemes Ingenierie Sa Unite de detection protegee contre l'arrachement et/ou l'effraction et systeme comprenant au moins une telle unite
EP2113896A1 (fr) * 2008-04-29 2009-11-04 Radio Systèmes Ingenierie (Société Anonyme) Unité de détection protégée contre l'arrachement et/ou l'effraction et système comprenant au moins une telle unité

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602079A1 (fr) * 1986-07-24 1988-01-29 Sessegolo Jean Fiche electrique antivol.
US4855719A (en) * 1986-10-07 1989-08-08 Hermetic Switch, Inc. Electrical receptable alarm switch
US4980672A (en) * 1989-10-17 1990-12-25 Generation 2, Inc. Overhead socket smoke detector with theft alarm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602079A1 (fr) * 1986-07-24 1988-01-29 Sessegolo Jean Fiche electrique antivol.
US4855719A (en) * 1986-10-07 1989-08-08 Hermetic Switch, Inc. Electrical receptable alarm switch
US4980672A (en) * 1989-10-17 1990-12-25 Generation 2, Inc. Overhead socket smoke detector with theft alarm

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2412472A (en) * 2004-03-25 2005-09-28 Optex Co Ltd Tampering switch for security sensors
US7170403B2 (en) 2004-03-25 2007-01-30 Optex Co., Ltd. Tamper switch structure and security sensor including the tamper switch structure
GB2412472B (en) * 2004-03-25 2008-10-22 Optex Co Ltd Tamper switch structure and security sensor including the tamper switch structure
DE102005062492A1 (de) * 2005-12-27 2007-07-12 Albrecht Jung Gmbh & Co. Kg Elektrisches/elektronisches Installationsgerät
DE102005062492B4 (de) * 2005-12-27 2007-10-31 Albrecht Jung Gmbh & Co. Kg Elektrisches/elektronisches Installationsgerät
FR2930666A1 (fr) * 2008-04-29 2009-10-30 Radio Systemes Ingenierie Sa Unite de detection protegee contre l'arrachement et/ou l'effraction et systeme comprenant au moins une telle unite
EP2113896A1 (fr) * 2008-04-29 2009-11-04 Radio Systèmes Ingenierie (Société Anonyme) Unité de détection protégée contre l'arrachement et/ou l'effraction et système comprenant au moins une telle unité

Also Published As

Publication number Publication date
DE69306158T2 (de) 1997-03-20
ITMI921036A0 (it) 1992-04-30
IT1255115B (it) 1995-10-20
ES2095558T3 (es) 1997-02-16
EP0568137B1 (fr) 1996-11-27
DE69306158D1 (de) 1997-01-09
ITMI921036A1 (it) 1993-10-30

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