WO2004102502A1 - Points d'appel - Google Patents

Points d'appel Download PDF

Info

Publication number
WO2004102502A1
WO2004102502A1 PCT/GB2004/001951 GB2004001951W WO2004102502A1 WO 2004102502 A1 WO2004102502 A1 WO 2004102502A1 GB 2004001951 W GB2004001951 W GB 2004001951W WO 2004102502 A1 WO2004102502 A1 WO 2004102502A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
call point
chassis
displaceable element
point according
Prior art date
Application number
PCT/GB2004/001951
Other languages
English (en)
Inventor
John Francesco Bourne
Christopher Martin Stringfellow
Neil John Morris
Karl Andrew Vondrak
Original Assignee
Kac Alarm Company Limited
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 Kac Alarm Company Limited filed Critical Kac Alarm Company Limited
Priority to EP04742892.5A priority Critical patent/EP1627368B1/fr
Publication of WO2004102502A1 publication Critical patent/WO2004102502A1/fr
Priority to NO20055994A priority patent/NO332652B1/no

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/12—Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators, e.g. details of alarm push buttons mounted on an infrastructure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts

Definitions

  • This invention relates generally to alarm call points, with the term "call point” being used to refer to a manually-operable alarm device of the kind which is activated by user, in response to a fire or other such incident.
  • call points in use, form part of an alarm system, with it commonly being the case that a number of call points are used, in a given system, at various locations in a building, for example.
  • call points have often been of the "break-glass" type, in which a sheet of glass or other frangible-type material must be broken, either manually or with the aid of a certain tool, so as to actuate a switch in the call point which, in term, causes the alarm to sound.
  • a particular call point is of the first (frangible) or second (non- frangible) type, a widely-accepted requirement is that unauthorised access to the internal components of the call point should be restricted, for evident safety and functional reasons.
  • a call point having a chassis, a displaceable element movable between set and activated positions so as to trigger an alarm, a flag to provide a visual indication of such activation and a cover, the displacement element and flag being operatively associated with the cover, in that removal of the cover from the chassis results in activation of the call point and the provision of a visual indication thereof.
  • the displaceable element may be biased (perhaps resiliently-biased) towards the activated position, the cover having an engagement part which, when the cover is attached to the chassis, restricts movement of the displaceable element towards said activated position.
  • the displaceable elements may comprise a plate, an edge of which, in the set position, may bear upon an engagement part of the cover.
  • the plate may be deformable, such that inwardly-directed pressure exerted thereupon allows the edge thereof to move free of the engagement part, thus allowing the plate to move towards the activated position.
  • the flag may be integral with or attached to the displaceable element.
  • the flag comprises a part of the displaceable element which is visually distinct from the remainder thereof.
  • the cover may be mounted on the chassis such that limited sliding movement therebetween may be effected.
  • the chassis may have a catch which engages with the cover to restrict said sliding movement.
  • the catch is releasable using an appropriately configured key.
  • the catch may comprise a resilient limb, with the key, in use, preferably being operative to urge part of the limb out of engagement with the cover.
  • the displaceable element may be provided with a restraining formation which, when the displaceable element is in the activated position, is operative to restrict movement of the element back towards the set position.
  • the restraining formation may comprise a protrusion, which in use, may abut against a co-operating formation of the chassis.
  • the co-operating formation comprises a resilient finger. Sliding movement of the cover may allow the displaceable element to move between set and test positions.
  • An appropriately configured key may be required to allow movement of the displaceable element towards the test position, although the key may not be so required to return the element to the set position.
  • an alarm call point having a chassis, a displaceable element movable between set and test positions so as to test the alarm and a cover, the cover being mounted for sliding movement on the chassis and being operatively associated with the displaceable element such that an alarm test procedure may be invoked by bringing about sliding movement of the cover.
  • the invention in its second aspect, may comprise one or more of the features described in relation to the first aspect, or elsewhere herein.
  • a trigger mechanism for a call point comprising a displaceable element adapted for movement, in use, between set and activated positions so as to trigger an alarm, a flag to provide a visual indication of such activation and a cover, the displaceable element and flag being operatively associated with the cover whereby removal of the cover from a chassis of the call point results in activation of the call point and the provision of a visual indication thereof.
  • the invention in its third aspect, may comprise one or more of the features set out in the preceding paragraphs, or elsewhere herein.
  • Figure 1 is an exploded view of the principal components of a call point
  • Figures 2A, 2B and 2C are perspective views of a call point chassis
  • Figures 3 A and 3B are perspective views of a call point cover
  • Figure 4 is a perspective view of a displaceable (non-frangible) element, or pressure plate;
  • Figures 5A and 5B are perspective illustrations of a call point release key
  • Figures 6A and 6B are perspective illustrations of a spring biased- plunger. Detailed Description and Best Mode of the Invention
  • a call point assembly (shown in exploded form) includes a chassis 10 and a displaceable element 11 which, when the call point is assembled, lies between the chassis 10 and a removable cover 12.
  • a frangible plate 13 (made, for example, of glass) may be provided, in conjunction with an optional graphics label 14 which may be adhered thereto.
  • the present invention relates principally to non-frangible type call points, with the glass plate 13 and graphics label 14 thus being shown simply for the sake of completeness.
  • a hinged lid 15 may also be provided which, as shown in Figure 2A, is pivotally secured to an upper part of the chassis 10, so as to provide protection against inadvertent activation of the call point, in generally conventional manner.
  • the lid 15, for the avoidance of doubt, does not form part of the present invention.
  • a printed circuit board Disposed towards the rear of the call point chassis 10 is a printed circuit board (PCB) 16, to which are mounted appropriate electronic and electrical components, again in generally conventional manner.
  • an LED 17 is provided, which illuminates in the event of the call point being activated.
  • a microswitch assembly 18 mounted to the PCB 16 is a microswitch assembly 18 having an actuating element 19 disposed, when the call point is assembled, for engagement with a spring-biased plunger 20, shown in more detail in Figures 6 A and 6B.
  • the plunger 20 is attached to the PCB 16 by way of slotted engagement between an engagement head 21 and a slot 22 provided in an edge portion of the PCB 16, with a coil (compression) spring 23 being disposed between the plunger 20 and a spring-holding lug 24 provided as part of a PCB cover 25. It should be understood, in that regard, that movement of the plunger 20 in line with the principal axis of the spring 23 causes the switch actuating element 19 to be depressed/released, thus activating/resetting an associated alarm system, depending upon the system's particular configuration.
  • release/ test key 26 which, as explained in more detail hereinafter, serves to release the cover 12 from the chassis 10, for resetting and testing purposes.
  • the key 26 is illustrated in more detail in Figures 5A and 5B.
  • the PCB 16 is provided with at least one (in this case two) edge connectors 27 which are adapted for electrically-conducting engagement with a removable connector 28, by way of a push- fit engagement, to facilitate call point installation. This is described in more detail in our co-pending patent application and does not form part of the present invention.
  • the plunger 20 is slidably received within a slot 22 of the PCB 16 which, in turn, is attached, by way of a snap-fit engagement, to the PCB cover assembly 25.
  • this sliding engagement is assisted by a pair of plunger runners 21-, which lie either side of guide ribs 22- provided on an inside surface of the chassis 10.
  • the spring 23 is thus trapped between the plunger 20 and an inwardly-facing surface of the holding lug 24 meaning, when assembled, that a nose 29 of the plunger 20 will be disposed near - but slightly raised from - a V-shaped recess 30 provided in an edge 31 of the chassis 10.
  • This nose 29 is received by a correspondingly-configured V-shaped recess 32 provided in an edge 33 of the displaceable element 11.
  • Runner ribs 37 are also provided, whereby the displaceable element 11 may undergo limited sliding movement, generally in the plane of the chassis 10, against the action of the spring 23. Downward movement of the element 11, under the bias of the spring 23, is restricted by engagement of a lower edge 38 of the element 11 with the inturned formations 35.
  • the element 11 is free to move - albeit to a limited extent - in an upwards direction, against the action of the spring 23, into an aperture 39 provided in the chassis.
  • the displaceable element 11 is held in place by the cover 12 which is mounted to the chassis 10 by engagement of cover arms 40 with outer surfaces of the chassis side walls 36.
  • the cover arms 40 are configured so as to permit limited sliding movement of the U-shaped cover 40 along runner tracks 41 of the chassis 10, with inwardly facing lugs 42, provided on the cover arms 40, serving to restrict the degree of permitted sliding movement, by abutment thereof with stop walls 43 of the chassis.
  • the distal ends of the cover arms 40 will lie in contact with abutment surfaces 44 of the chassis,, although sliding movement of the cover, in a generally downwards direction, allows the cover 12 to become slightly separated from these abutment surfaces, with the degree of separation being limited by the presence of the stop walls 43 of the chassis.
  • the cover 12 is held in position as a result of a snap-fitting engagement between a pair of resilient, barbed limbs 73 and ramped shoulder formations 54 provided on the cover 12.
  • the cover 12 is restrained from sliding movement, relative to the chassis 10 which, in turn, means that the displaceable element 11 is trapped within the assembly.
  • this state of affairs relates to an "alarm set” condition, with it being necessary, to activate the alarm, to allow the plunger 20 to move relative to the microswitch actuator 19 which, in turn, requires movement of the displaceable element 11 that is held in abutting relationship with the nose 29 of the plunger 20.
  • the displaceable element which is flexible but non-frangible, is depressed, using manual (finger) pressure in an inwards direction, into the body of the call point.
  • the displaceable element 11 is also provided with a pair of ramped formations 68 which, in use, bear upon the concave surface 55 of the chassis 10, so as to encourage deformation of the element 11 to occur towards a lower part thereof, and thus to facilitate the engagement between the parts 56 and 57, by hindering any such inward flexing towards the upper part of the element 11.
  • the displaceable element 11 is trapped between the cover 12 and a somewhat concave surface 55 of the call point chassis.
  • the element 11 is provided, on its rear surface, with a shelf-like protrusion 56 which, when the element 11 adopts its inwardly-flexed condition, mates with the distal end of a resilient finger 57, thus preventing upward sliding movement of the element 11.
  • the element 11 is prevented from upwards movement by engagement of the protrusion 56 with the finger 57, with it not being possible to disengage these components without the element 11 returning to its unflexed (flat) condition. This, however, is prevented by the engagement posts 50 which now press upon a lower part 58 of the element 11, keeping it in its flexed condition.
  • the key 26 is introduced through a keyhole 59, so that ramped key surfaces 60 may be brought into sliding engagement with barbed formations 61 of the resilient limbs 73.
  • This engagement results in the resilient limbs 73 being deflected inwardly (i.e. into the body of the call point) which, in turn, frees the barbs 61 from their engagement with the engagement shoulders 54 of the cover 12.
  • the cover 12 is free to move in a generally downwards direction, with this movement being assisted by the sprung-fork nature of the key 26.
  • the key 26 comprises a pair of splayed but resilient limbs 62 which are able to flex away from each other upon introduction of the key 26 into the keyhole 59, with a somewhat hexagonal guide element 63 assisting in this splaying separation.
  • the key is also provided with a pair of shoulder-like catch formations 64 which, once the key is fully introduced, engage with a pair of suitably- configured engagement elements 65 provided on the cover 12. This engagement allows the key to be used to pull the cover 12 away from (and generally downwardly in relation to) the chassis 10, subsequent to which the key may be removed.
  • the operative relationship between the cover 12 and the displaceable element 11 allows the call point of the present invention to operate in a substantially tamper proof manner, as it is very difficult - if not impossible - to remove the cover 12 from a "set" call point without allowing the displaceable element 11 to be released under the influence of the spring 23.
  • tampering is likely to result not only in activation of the alarm itself but also in a visual indication of that fact, by virtue of the flag 52 coming into view, under the action of the spring 23.
  • the key is only, in fact, required to release the cover 12 from the chassis 10; the key is not needed to reset the mechanism, as all that is required is for sliding movement of the cover 12 to be effected, which can be done manually, by a user.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Casings For Electric Apparatus (AREA)
  • Audible And Visible Signals (AREA)
  • Burglar Alarm Systems (AREA)
  • Electric Clocks (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

Un point d'appel comprend un châssis et un élément mobile qui se déplace entre les positions fixe et activée de manière à déclencher une alarme et montrer un drapeau qui permet l'affichage visuel de cette activation, de même qu'un couvercle destiné à l'élément de déplacement; le drapeau peut être associé fonctionnellement avec le couvercle en ce que le retrait du couvercle du châssis provoque l'actionnement du point d'appel et une indication visuelle de cet événement.
PCT/GB2004/001951 2003-05-17 2004-05-06 Points d'appel WO2004102502A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04742892.5A EP1627368B1 (fr) 2003-05-17 2004-05-06 Points d'appel
NO20055994A NO332652B1 (no) 2003-05-17 2005-12-16 Varslingspunkt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0311391.7 2003-05-17
GB0311391A GB2401992B (en) 2003-05-17 2003-05-17 Call points

Publications (1)

Publication Number Publication Date
WO2004102502A1 true WO2004102502A1 (fr) 2004-11-25

Family

ID=9958283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001951 WO2004102502A1 (fr) 2003-05-17 2004-05-06 Points d'appel

Country Status (6)

Country Link
EP (1) EP1627368B1 (fr)
GB (1) GB2401992B (fr)
MY (1) MY137917A (fr)
NO (1) NO332652B1 (fr)
TW (1) TW200508997A (fr)
WO (1) WO2004102502A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10249175B2 (en) 2015-09-18 2019-04-02 Gulf Security Technology Company Limited Push plate of manual alarm device

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406717B (en) * 2003-09-30 2007-09-05 Safety Technology Internat Alarm call point
GB2415830B (en) * 2004-07-01 2006-05-17 Europ Safety Systems Ltd Call point
DE102006046839B4 (de) * 2006-10-02 2020-03-12 Robert Bosch Gmbh Branddruckknopfmelder
DE102007020282A1 (de) * 2007-04-30 2008-11-06 Robert Bosch Gmbh Meldevorrichtung mit Testmechanismus sowie Spezialschlüssel zur Betätigung des Testmechanismus
DE102007020284A1 (de) * 2007-04-30 2008-11-06 Robert Bosch Gmbh Meldevorrichtung mit manueller Auslösung und Alarmanzeige
GB2456327B (en) * 2008-01-11 2009-12-30 Everday Technology Co Ltd Manual call point
CN102208296B (zh) 2010-03-31 2013-11-06 西门子公司 一种手动报警装置的复位机构及其手动报警装置
RU177083U1 (ru) * 2016-11-10 2018-02-07 Общество с ограниченной ответственностью "Группа компаний "РУБЕЖ" Извещатель пожарный ручной
DE102017100476A1 (de) * 2017-01-11 2018-07-12 Dormakaba Deutschland Gmbh Fluchtwegterminal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638297A (en) * 1984-08-20 1987-01-20 Killark Electric Manufacturing Company Remote signaling box
WO2001011585A1 (fr) 1999-08-10 2001-02-15 Fulleon Limited Points d'appels ou unites a bris de glace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024521A (en) * 1978-04-11 1980-01-09 Kac Alarm Co Ltd Electrical Switch
GB2352332B (en) * 1999-07-22 2003-10-08 Kac Alarm Company Ltd A trigger mechanism for an alarm call-point

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638297A (en) * 1984-08-20 1987-01-20 Killark Electric Manufacturing Company Remote signaling box
WO2001011585A1 (fr) 1999-08-10 2001-02-15 Fulleon Limited Points d'appels ou unites a bris de glace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10249175B2 (en) 2015-09-18 2019-04-02 Gulf Security Technology Company Limited Push plate of manual alarm device

Also Published As

Publication number Publication date
EP1627368B1 (fr) 2015-10-28
MY137917A (en) 2009-03-31
GB2401992B (en) 2006-12-13
TW200508997A (en) 2005-03-01
NO332652B1 (no) 2012-11-26
GB0311391D0 (en) 2003-06-25
NO20055994L (no) 2006-02-17
GB2401992A (en) 2004-11-24
EP1627368A1 (fr) 2006-02-22

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