EP0503965A1 - Gefahrenmeldeanlage - Google Patents
Gefahrenmeldeanlage Download PDFInfo
- Publication number
- EP0503965A1 EP0503965A1 EP92302188A EP92302188A EP0503965A1 EP 0503965 A1 EP0503965 A1 EP 0503965A1 EP 92302188 A EP92302188 A EP 92302188A EP 92302188 A EP92302188 A EP 92302188A EP 0503965 A1 EP0503965 A1 EP 0503965A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- back plate
- container
- alarm
- edges
- cover
- 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- Withdrawn
Links
Images
Classifications
-
- 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
- G08B29/10—Monitoring of the annunciator circuits
Definitions
- This invention relates to an alarm system, particularly a siren system intended to be mounted on an exterior wall of a building so that it can be activated from within the building to produce an audio alarm.
- the siren must be mounted in a secure container so that it cannot be easily disabled in is position exterior of the building.
- a siren system will comprise a back plate secured to the exterior wall by fastening means only accessible from within the container and with an electrical connection passing through the wall and back plate into the container.
- a mounting plate is mounted on the back plate and carries the electronics, loud speaker(s), backup battery, switches, etc., for producing the audio signal.
- An inner cover member is secured to the mounting plate to form therewith an inner container/housing around the audio system and an outer cover member is secured to the back plate to form therewith an outer container/housing.
- the alarm is triggered if an electrical connection is made between the inner and outer cover members for example by penetration by a drill, that the alarm is triggered if the fastening members securing the outer cover to the back plate are removed, and the alarm is triggered if the container is attacked by fire.
- One object of the present invention is to provide an alarm siren system which has the above features but additionally includes other features which make it more secure and less susceptible to successful disablement.
- the system according to the invention includes a plurality of new features any of which may be claimed independently or in any combination.
- the invention also extends to a new form of visual light arrangement particularly suitable for use with an alarm system but which may be claimed or used independently of an alarm system.
- the light generating tube may itself be within the container and the light transmitted to a solid piece of plastics material on the exterior of the container by reflection, refraction, light tube or the like.
- a system is extremely indestructible and may be used and claimed independently of an alarm system.
- the invention provides an alarm system comprising a light source adapted to be mounted on an exterior wall of a building and for connection to initiating means adapted, when activated, to initiate the light source to give an alarm signal, the light source being embedded in and/or arranged to transmit light through a solid piece of strong light transmitting material such that when mounted no wiring is accessible for disablement.
- this invention provides an alarm system comprising an audio alarm located within a secure container, the container being adapted to be mounted on an exterior wall of a building and to be connected to initiating means arranged, when activated, to initiate the alarm, and including a light source arranged to be initiated by the same initiating means to give a light indication, the light source being embedded in and/or arranged to transmit light through a solid piece of strong light transmitting material secured to the exterior of the container such that no wiring is accessible for disablement.
- An alarm system has a metal back plate 12 having a base 13 formed with four depressions defining feet 14 adjacent its corners.
- the back plate is secured to the exterior wall 15 of a building by screws 16 extending through screw holes 17 in the centres of the depressions and with the feet abutting the wall so that the back surface 18 of the back plate is spaced from the wall by about 6 millimetres.
- the top, side and bottom edges, 20, 21 and 22 respectively are turned forwardly and are also turned inwardly at an angle of about 10 degrees.
- the bottom edge 22 defines two screw holes 23 for receiving screws 24 for securing an outer cover member 25 to the back plate.
- the outer cover member 25 has an inwardly turned lip 83 along its top edge which engages over the top of the back plate and the cover member has no openings therein except for receiving the screws 24.
- the back plate has two series of apertures 26, each arranged in an annulus 27 corresponding with the outer rim of a respective loud speaker 28 for outlet of sound.
- the back plate also has an aperture 31, defined by a bush 32, for receiving an electrical cable 33 extending through the wall and has an aperture 34 for a foam detector to be described hereinafter.
- the back plate also has four mounting pegs or screws 35 surrounded by insulating members 36 by which a mounting plate 40 is mounted on the back plate.
- the apertures 26 are covered by sheets of woven cloth material, indicated at 37, stuck to the inner surface of the back plate, which sheets prevent entry of foam.
- the mounting plate 40 is formed from sheet metal having forwardly turned edges at least the side edges 41 of which are also turned inwardly at an angle of about 10 degrees.
- the plate 40 is formed with four keyhole apertures 42 by which the plate is mounted on the back plate suspended from the pegs or screws 35, with the mounting plate insulated from the back plate.
- the mounting plate carries all the electronics, loud speakers and backup battery for operating the siren alarm. These may be of known form and will not be described in detail nor is the connecting wiring shown in the drawings as this does not form part of the inventive features.
- the mounting plate carries loud speakers 28 and is also formed with a series of apertures indicated at 43 arranged in two annuli and substantially aligned with the apertures 26 in the back plate.
- the electronic circuitry is mounted on a circuit board 44 slidably mounted between two spaced upstanding walls 45.
- a battery 46 is also mounted on the mounting plate and partly surrounded by an upstanding wall 47.
- Micro switches 48 of known form are arranged to be engaged by the screws 24 such that if the screws are removed the alarm is triggered.
- An inner cover member 50 is made from sheet metal having a flat top 51 and sides 52 which slope outwardly at about 10 degrees and are dimensioned to be a close fit within the inner sloping edges 41 of the mounting plate.
- the inner cover member 50 is secured to the mounting plate by screws 53 and 54 through the top and bottom sides.
- the tops of the walls 45 and 47 are spaced about 2 millimetres from the inner surface of the inner cover member.
- they may extend right up to the inner surface of the cover member or more preferably have lugs (not shown) which extend through the cover member to prevent blows on the inner cover member forcing these walls outwardly. These walls help to prevent damage to the electronic ciruitry or the battery if the inner cover member is subjected to damaging blows.
- the outer cover member 25 is formed from sheet metal having a top 60 and sides 61 which are outwardly sloped at an angle of about 10 degrees. When the outer cover is secured to the back plate it is spaced from the inner cover.
- a mercury tilt switch 63 mounted on the outer cover member between the inner and outer cover members. The switch is arranged to activate the alarm if the outer cover member is tilted more than a predetermined amount for example 5 degrees or is subject to a shock above a predetermined level for example 2G.
- a similar mercury tilt switch 64 is mounted on the inner cover member.
- the whole system has a depth when assembled between the front surface of the outer cover member and the back surface of the back plate which is only fifty millimetres.
- a foam and fire detection unit 70 is mounted on the mounting plate under the circuit board 44.
- the unit comprises a circuit board 71 having first and second thermistors 72, 73 projecting from opposite sides of the board and linearly coupled together.
- the board is mounted on a hollow member 74 secured in an aperture 75 in the mounting plate so that the first thermistor 72 is exposed to the exterior of the outer container through aperture 34 and the second thermistor is located in the inner container formed by the mounting plate and inner cover member 50.
- the circuitry on the board 71 is arranged to trigger the alarm if the temperature of the first or second thermistor exceeds that of the second or first thermistor respectively by more than five or ten degrees C respetively.
- Figure 6 shows the outer cover member 25 being used as a tray and the inner cover being used as a hood during connection of the system to a wall.
- the outer cover member is arranged to be supported at the side of the back plate during assembly.
- a strobe fluorescent light is often mounted on a conventional outer cover of a siren alarm unit to be initiated by initiation of the alarm. As seen in Figure 3, such a unit 76 is mounted on a separate mounting plate 77 attached to the back plate by fasteners 78 only accessible from the interior of the unit.
- a fluorescent light tube 80 is embedded in a sheet or block 81 of transparent or translucent plastics or other strong material (such as "unbreakable” glass) mounted on the bottom edge of the cover member 25 and connected by wiring 82, also inaccessible (by being embedded in the material), to the interior of the container.
- the light could be transmitted from a light source in the interior to the block of material by reflection, refraction, light tube or the like, so that the light source could not be broken by breaking the plastics or other material.
- the plastics material block is preferably connected to the outer cover by the screws which connect that cover to the back plate, so that tampering with the fixing of the strobe light initiates the alarm siren and the light.
- the inner cover may be formed with holes adjacent the loud speakers, so as to increase the sound escaping if the back has been surrounded by foam and the front cover already attacked.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
- Fire-Detection Mechanisms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9105495 | 1991-03-15 | ||
GB9105495A GB2253734B (en) | 1991-03-15 | 1991-03-15 | Alarm system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0503965A1 true EP0503965A1 (de) | 1992-09-16 |
Family
ID=10691618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92302188A Withdrawn EP0503965A1 (de) | 1991-03-15 | 1992-03-13 | Gefahrenmeldeanlage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0503965A1 (de) |
GB (1) | GB2253734B (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995030982A1 (en) * | 1994-05-07 | 1995-11-16 | Pyronix Limited | Sounder |
EP2993650B1 (de) | 2014-09-05 | 2020-07-29 | ELV Elektronik AG | Sensoreinrichtung |
CN113744509A (zh) * | 2021-09-06 | 2021-12-03 | 华帝股份有限公司 | 一种翻盖的预警方法、装置、计算机设备及可读存储介质 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9410581D0 (en) * | 1994-05-26 | 1994-07-13 | Independent Computer Support | Electronic security device |
GB2359649B (en) * | 2000-02-25 | 2004-06-16 | Delaware Electronic Technology | Alarm unit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3710371A (en) * | 1970-02-18 | 1973-01-09 | G Whalen | Portable security alarm and alarm system |
US4241332A (en) * | 1979-02-05 | 1980-12-23 | Body Guard, Inc. | Personal security alarm |
DE8627987U1 (de) * | 1986-10-21 | 1986-12-04 | Sonax-Alarmanlagen GmbH & Co KG, 49477 Ibbenbüren | Schutzgehäuse für einen akustischen Signalgeber |
GB2215500A (en) * | 1988-03-08 | 1989-09-20 | Triple S Developments Ltd | Burglar alarms |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2187893B (en) * | 1986-03-15 | 1988-11-30 | Unisys Corp | Shielded equipment enclosure |
GB2189083B (en) * | 1986-03-15 | 1989-11-08 | Burroughs Corp | Equipment enclosure |
-
1991
- 1991-03-15 GB GB9105495A patent/GB2253734B/en not_active Expired - Fee Related
-
1992
- 1992-03-13 EP EP92302188A patent/EP0503965A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3710371A (en) * | 1970-02-18 | 1973-01-09 | G Whalen | Portable security alarm and alarm system |
US4241332A (en) * | 1979-02-05 | 1980-12-23 | Body Guard, Inc. | Personal security alarm |
DE8627987U1 (de) * | 1986-10-21 | 1986-12-04 | Sonax-Alarmanlagen GmbH & Co KG, 49477 Ibbenbüren | Schutzgehäuse für einen akustischen Signalgeber |
GB2215500A (en) * | 1988-03-08 | 1989-09-20 | Triple S Developments Ltd | Burglar alarms |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995030982A1 (en) * | 1994-05-07 | 1995-11-16 | Pyronix Limited | Sounder |
GB2302438B (en) * | 1994-05-07 | 1998-08-19 | Pyronix Ltd | Sounder |
EP2993650B1 (de) | 2014-09-05 | 2020-07-29 | ELV Elektronik AG | Sensoreinrichtung |
CN113744509A (zh) * | 2021-09-06 | 2021-12-03 | 华帝股份有限公司 | 一种翻盖的预警方法、装置、计算机设备及可读存储介质 |
CN113744509B (zh) * | 2021-09-06 | 2023-02-28 | 华帝股份有限公司 | 一种翻盖的预警方法、装置、计算机设备及可读存储介质 |
Also Published As
Publication number | Publication date |
---|---|
GB2253734A (en) | 1992-09-16 |
GB9105495D0 (en) | 1991-05-01 |
GB2253734B (en) | 1994-07-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR IT NL |
|
17P | Request for examination filed |
Effective date: 19930316 |
|
17Q | First examination report despatched |
Effective date: 19950509 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19971024 |