EP1503390A2 - Interrupteur d'alarme - Google Patents

Interrupteur d'alarme Download PDF

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Publication number
EP1503390A2
EP1503390A2 EP04254537A EP04254537A EP1503390A2 EP 1503390 A2 EP1503390 A2 EP 1503390A2 EP 04254537 A EP04254537 A EP 04254537A EP 04254537 A EP04254537 A EP 04254537A EP 1503390 A2 EP1503390 A2 EP 1503390A2
Authority
EP
European Patent Office
Prior art keywords
latch
call point
displaceable element
displaceable
abutment
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Withdrawn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
EP04254537A
Other languages
German (de)
English (en)
Other versions
EP1503390A3 (fr
Inventor
Christopher R. Johnson
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.)
CQR Security Components Ltd
Original Assignee
CQR Security Components Ltd
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 CQR Security Components Ltd filed Critical CQR Security Components Ltd
Publication of EP1503390A2 publication Critical patent/EP1503390A2/fr
Publication of EP1503390A3 publication Critical patent/EP1503390A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
    • H01H2003/0233—Emergency operating parts, e.g. for stop-switch in dangerous conditions for alarm triggering, e.g. fire alarm, emergency off switches operated by breaking a glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/052—Controlling, signalling or testing correct functioning of a switch

Definitions

  • the present invention relates to a call point for an alarm system such as a fire alarm system or an intruder alarm system more particularly to a manually operable call point which can be actuated and subsequently reset to test the alarm system to which it is connected.
  • Fire alarm systems frequently incorporate one or more manually operable call points which can be actuated by a person who discovers a fire in order to activate a fire alarm.
  • Such call points have traditionally incorporated a glass plate or element accessible through a window, a spring loaded switch resting on an edge of the glass plate.
  • a person strikes the glass plate through the window, breaking the plate such that the switch is released.
  • the status of the call point can be easily visually determined by a simple visual assessment of the condition of the glass plate.
  • a problem with such existing frangible type or break glass call points is that the call point cannot normally be actuated in order to test the alarm system without requiring the replacement of the glass plate which must be broken in order to actuate the call point.
  • call points have been developed using resettable non-frangible actuating means which can be activated and reset repeatedly without requiring replacement of a frangible element.
  • An example of such a resettable call point is shown in GB 2024521.
  • the construction of the call point is essentially similar to that of the traditional frangible type.
  • the frangible glass plate is replaced by a resilient plate 16 which can be deformed to release the switch 15 and activate the alarm system.
  • a tool can be used to reset the switch whereupon the plate 16 restores itself to its initial configuration.
  • a problem with this type of non-frangible call point is that the status of the call point cannot be easily determined by a cursory visual inspection.
  • a call point for use in fire or intruder alarm systems comprising a displaceable or frangible element, at least a portion of which is manually displaceable in order to actuate a switch to indicate an alarm condition.
  • said displaceable element is displaceable between a first position and a second position, the switch being actuatable when the displaceable element moves from its first position to its second position, first biasing means biasing the displaceable element from its first to its second position, the call point further comprising a latch having an abutment engageable against a portion of the displaceable element to maintain the displaceable element in its first position against the action of the first biasing means, the latch being manually moveable from an active position wherein the abutment engages said portion of the displaceable element to an inactive position wherein the displaceable element is free to move to its second position under the action of the first biasing means, in order to actuate the switch and thus test the alarm system.
  • the latch comprises an elongate hollow cylindrical body rotatably mounted within a housing of the call point for rotation about a longitudinal axis of the cylindrical body, said axis of rotation of the latch being arranged substantially parallel with the direction of movement of the displaceable element from its first to its second position, the abutment comprising a segment of an end of the latch adjacent said portion of the displaceable element, said segment having an axial extension greater than that of the remainder of said end of the latch, whereby the latch is rotatable between its active position, wherein a portion of the displaceable element engages the abutment to maintain the displaceable element in its first position, and its inactive position, wherein the abutment is displaced out of alignment with said portion of the displaceable element such that the displaceable element can move past the abutment, under the action of the first biasing means, to its second position.
  • the latch is operable by means of a key insertable through an aperture in the housing into the hollow centre of the of the latch, said key having one or more radially extending protrusions engaging corresponding slots or apertures in the inner surface of the latch such that the latch can be moved from its active to its inactive position by rotation of the key once inserted into the latch to a depth wherein said protrusions thereof engage said slots of the latch, whereby the abutment is moved out of alignment with said portion of the displaceable element such that the element moves from its first to its second position to actuate the switch in order to test the alarm system.
  • the key In order to reset the call point the key may be inserted further through the hollow centre of the latch until the end thereof engages said portion of the displaceable element, whereby further inward movement of the key urges the displaceable member from its second to its first position against the action of the first biasing means.
  • the latch may be moved from its inactive position to its active position by further rotation of the key, with the key remaining fully inserted such that the displaceable element is held in its first position.
  • a second biasing means biasing the latch from its inactive to its active position, the protrusions of the key being arranged such that said protrusions disengage said corresponding slots or apertures in the inner surface of the latch to permit free rotation of the latch relative to the key when the key is fully inserted to push the displaceable member to its first position such the latch rotates from its inactive position to its active position under the action of the second biasing means when the key is pushed fully in so as to reset the call point.
  • the call point further includes an indicating means viewable through a viewing window, the indicating means being obscured by the displaceable element when the displaceable element is in its first position, the indicating means being visible through the viewing window when the displaceable element is in its second position in order to provide a visible indication of the actuation of the call point.
  • the indicating means comprises a label applied to an inner wall of a housing of the call point behind at least a portion of the viewing window.
  • a call point As shown in Fig. 1, a call point according to the invention comprises a housing 1 fitted with a removable cover 2, the cover 2 having a viewing window 3 in a front surface thereof.
  • a displaceable element or plate 4 is movably mounted inside the housing 1, the plate 4 being visible and accessible through the viewing window 3.
  • An aperture 5 is provided in a lower side of the housing 2 though which is insertable a test and resetting key 6 as will be described below.
  • Figs. 2, 3 and 4 show the call point of Fig. 1 with the cover 2 removed to enable the internal components of the call point to be viewed.
  • the plate 4 comprises a rectangular planar member formed from a resilient material, said plate 4 being moveably mounted in the housing 1 such that the plate 4 is displaceable between a first position, shown in Fig. 3, wherein the upper edge of the plate 4 engages a spring loaded trigger 7 of a switch 8 to hold the switch 8 in an open position whereby the alarm is deactivated, and a second position, shown in Fig. 4, wherein the trigger 7 of the switch 8 is released, causing the switch 8 to close thus activating the alarm.
  • a compression spring 9 is mounted in the housing 1 acting between a wall of the housing 1 and an extension 10 of the plate 4, whereby the plate is biased towards its second position.
  • a latch 11 having an abutment 12 engageable against the lower edge the plate 4 is rotatably mounted in a lower part of the housing 1 of the call point to maintain the plate 4 in its first position against the action of the spring 9, the latch 11 being manually rotatable from an active position wherein the abutment 12 is aligned with and engages the lower edge of the plate 4 to an inactive or test position, wherein the plate 4 is free to move past the abutment 12 to its second position under the action of the spring 9 in order to actuate the switch and thus test the alarm system.
  • the latch 11 comprises an elongate hollow cylindrical body rotatably mounted in the housing 1 of the call point for rotation about the longitudinal axis of the cylindrical body, said axis of rotation of the latch 11 being arranged substantially parallel with the direction of movement of the plate 4 from its first to its second position, the abutment 12 comprising a segment of an end of the latch 11 adjacent the lower edge of the plate 4, said segment having an axial extension greater than that of the remainder of said end of the latch 11, whereby the latch 11 is rotatable between its active position, wherein the lower edge of the plate 4 engages the abutment 12 to maintain the plate 4 in its first position, and its inactive or test position, wherein the abutment 12 is displaced out of alignment with said portion of the plate 4 such that the plate 4 can move past the abutment 12, under the action of the spring 9, to its second position.
  • a spring 13 is mounted on the latch 11 to bias the latch 11 towards its active position.
  • the user presses the centre of the plate 4 visible through the viewing window 3.
  • the plate 4 is supported on its rear face adjacent its side edges by means of support members 14 (see Fig. 2) provided on the housing. Accordingly, manual pressure applied to the centre of the plate 4 causes the centre of the plate 4 to resiliently deflect inwardly such that the lower edge of the plate 4 is moved out of alignment with the abutment 12 provided on the latch 11, thereby releasing the plate 4 from the abutment 12 and allowing the plate 4 to move to its second position under the action of the spring 9, thus releasing the trigger 7 of the switch 8 and actuating the alarm.
  • the call point can be reset by inserting the key 6 into the aperture 5 in the housing 2 and through the latch 11 so that the end of the key 6 engages the lower edge of the plate 4 and pushes the plate 4 past the abutment 12 of the latch 11 and back into its first position.
  • the resilience of the plate 4 causes the plate to move back into engagement with the abutment 12 of the latch 11 once the plate 4 has been pushed back up into its first position by means of the key 6.
  • the key 6 is partially inserted into the aperture 5 in the housing 2 into the hollow centre of the of the latch 11 to the position shown in Fig. 5, said key 6 having opposed radially extending protrusions 15 engaging corresponding slots 16 in the inner surface of the latch 11 such that the latch 11 can be rotated from its active to its inactive or test position by rotation of the key 6 after insertion of the key 6 into the latch 11 to a depth wherein said protrusions 15 thereof engage said slots 16 of the latch 11, whereby the abutment 12 is moved out of alignment with the lower edge of the plate 4 such that the edge of the plate 4 can move past the abutment 12 allowing the plate 4 to move from its first to its second position under the action of the spring 9 to actuate the switch 8 in order to test the alarm system.
  • the key 6 is inserted further through the hollow centre of the latch 11 until the end thereof engages the lower edge of the plate 4, whereby further inward movement of the key pushes the plate 4 back into its first position against the action of the spring 9, as shown in Fig. 6.
  • the protrusions 15 of the key 6 are arranged such that said protrusions 15 disengage said corresponding slots 16 in the inner surface of the latch 11 to permit free rotation of the latch 11 relative to the key 6 when the key 6 is fully inserted to push the lower edge of the plate 4 clear of the abutment 12 of the latch 11 such that the latch 11 is free to rotate from its inactive position to its active position under the action of the spring 13.
  • Fig. 7. shows the call point according to the invention using a frangible glass plate 40 in place of the resilient plate 4 shown described above.
  • the frangible type of call point may be specified where it is necessary to quickly establish the status of the call point by a quick visual inspection.
  • the test and resetting key 6 can be used in exactly the same way as described above with reference to Figs. 5 and 6, the plate 40 being displaceable between its first and second positions by use of the key 6 in order to test and subsequently reset the call point as described above.
  • a problem associated with the resettable type of call point using a resilient plate 4 as shown in Figs. 1 to 6, is that it can be difficult to establish the status of the call point by a brief visual inspection since the plate 4 is not broken during operation of the call point.
  • This problem is addressed in the present invention as shown in Figs. 8 and 9 by providing a brightly coloured label 17 on the rear face of the housing 1 behind the plate 4, said label 17 being obscured by the plate 4 when the plate 4 is in its first position as shown in Fig. 8, the body of the plate 4 being opaque or non-transparent, the label 17 being visible through the viewing window 3 when the plate 4 is in its second position as shown in Fig.
  • extension 10 of the plate 4 against which the spring 9 acts being formed from a transparent material or having a viewing aperture therein, such that the label 17 is visible through the extension 10 of the plate 4 to provide a visual indication of the actuation of the call point.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Burglar Alarm Systems (AREA)
EP04254537A 2003-07-30 2004-07-29 Interrupteur d'alarme Withdrawn EP1503390A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0317798A GB2404494B (en) 2003-07-30 2003-07-30 Call point for an alarm system
GB0317798 2003-07-30

Publications (2)

Publication Number Publication Date
EP1503390A2 true EP1503390A2 (fr) 2005-02-02
EP1503390A3 EP1503390A3 (fr) 2007-03-21

Family

ID=27799447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04254537A Withdrawn EP1503390A3 (fr) 2003-07-30 2004-07-29 Interrupteur d'alarme

Country Status (2)

Country Link
EP (1) EP1503390A3 (fr)
GB (1) GB2404494B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965399A1 (fr) * 2007-03-01 2008-09-03 Siemens Schweiz AG Commutateur d'urgence pour un système d'alerte de danger
EP1988525A2 (fr) 2007-04-30 2008-11-05 Robert Bosch GmbH Dispositif d'alerte doté d'un mécanisme de test et clé spéciale destinée à l'actionnement du mécanisme de test
EP2093735A1 (fr) 2008-02-19 2009-08-26 Siemens Aktiengesellschaft Commutateur d'urgence doté d'un élément de commutation bistable
EP2166523A1 (fr) * 2008-09-18 2010-03-24 Novar GmbH Alarme manuelle
FR2966964A1 (fr) * 2010-10-28 2012-05-04 Cooper Technologies Co Dispositif d'alarme incendie
US9200604B2 (en) 2007-02-23 2015-12-01 Robert Bosch Gmbh Fuel injector having press-fitting structures
US10249175B2 (en) 2015-09-18 2019-04-02 Gulf Security Technology Company Limited Push plate of manual alarm device
GB2635003A (en) * 2023-08-25 2025-04-30 Jack Fuse Pty Ltd An improved switch unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2424764B (en) * 2005-03-31 2007-10-03 Maxhunt Ltd Call points

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2112211A (en) 1981-12-23 1983-07-13 Kac Alarm Co Ltd Electric switch
WO2001011585A1 (fr) 1999-08-10 2001-02-15 Fulleon Limited Points d'appels ou unites a bris de glace
EP1288881A1 (fr) 2001-09-03 2003-03-05 Siemens Building Technologies AG Avertisseur manuel de risques

Family Cites Families (3)

* 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
FR2813705B1 (fr) * 2000-09-05 2002-11-29 Legrand Sa Dispositif declencheur manuel a membrane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2112211A (en) 1981-12-23 1983-07-13 Kac Alarm Co Ltd Electric switch
WO2001011585A1 (fr) 1999-08-10 2001-02-15 Fulleon Limited Points d'appels ou unites a bris de glace
EP1288881A1 (fr) 2001-09-03 2003-03-05 Siemens Building Technologies AG Avertisseur manuel de risques

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9200604B2 (en) 2007-02-23 2015-12-01 Robert Bosch Gmbh Fuel injector having press-fitting structures
EP1965399A1 (fr) * 2007-03-01 2008-09-03 Siemens Schweiz AG Commutateur d'urgence pour un système d'alerte de danger
WO2008104604A1 (fr) * 2007-03-01 2008-09-04 Siemens Aktiengesellschaft Bouton d'appel d'urgence pour un système avertisseur de danger
EP1988525A2 (fr) 2007-04-30 2008-11-05 Robert Bosch GmbH Dispositif d'alerte doté d'un mécanisme de test et clé spéciale destinée à l'actionnement du mécanisme de test
EP1988525A3 (fr) * 2007-04-30 2010-01-06 Robert Bosch GmbH Dispositif d'alerte doté d'un mécanisme de test et clé spéciale destinée à l'actionnement du mécanisme de test
CN101299290B (zh) * 2007-04-30 2016-01-06 罗伯特·博世有限公司 具有测试机构的报警装置及用于操作测试机构的专用工具
EP2093735A1 (fr) 2008-02-19 2009-08-26 Siemens Aktiengesellschaft Commutateur d'urgence doté d'un élément de commutation bistable
WO2009103712A1 (fr) * 2008-02-19 2009-08-27 Siemens Aktiengesellschaft Commutateur d'appel d'urgence comportant un élément de commutation bistable
EP2166523A1 (fr) * 2008-09-18 2010-03-24 Novar GmbH Alarme manuelle
FR2966964A1 (fr) * 2010-10-28 2012-05-04 Cooper Technologies Co Dispositif d'alarme incendie
US10249175B2 (en) 2015-09-18 2019-04-02 Gulf Security Technology Company Limited Push plate of manual alarm device
GB2635003A (en) * 2023-08-25 2025-04-30 Jack Fuse Pty Ltd An improved switch unit

Also Published As

Publication number Publication date
EP1503390A3 (fr) 2007-03-21
GB2404494A (en) 2005-02-02
GB0317798D0 (en) 2003-09-03
GB2404494B (en) 2006-08-09

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