EP1612756A3 - Alarm call point - Google Patents

Alarm call point Download PDF

Info

Publication number
EP1612756A3
EP1612756A3 EP05105127A EP05105127A EP1612756A3 EP 1612756 A3 EP1612756 A3 EP 1612756A3 EP 05105127 A EP05105127 A EP 05105127A EP 05105127 A EP05105127 A EP 05105127A EP 1612756 A3 EP1612756 A3 EP 1612756A3
Authority
EP
European Patent Office
Prior art keywords
reed switch
call point
contacts
frangible element
magnet
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Withdrawn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
EP05105127A
Other languages
German (de)
French (fr)
Other versions
EP1612756A2 (en
Inventor
John Rattlidge
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.)
European Safety Systems Ltd
Original Assignee
European Safety Systems 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 European Safety Systems Ltd filed Critical European Safety Systems Ltd
Publication of EP1612756A2 publication Critical patent/EP1612756A2/en
Publication of EP1612756A3 publication Critical patent/EP1612756A3/en
Withdrawn legal-status Critical Current

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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding

Abstract

A call point comprising a frangible element 9 which is mounted within a housing 1 and exposed via a window 8 to enable it to be broken or displaced to indicate an alarm situation. The breakage or displacement of the frangible element causes a cam/lever assembly to rotate about an axis 10 moving a magnet carried on a lever 12 away from a reed switch 15, thus causing the reed switch contacts to change state. The reed switch is mounted in a sealed chamber 6 so that sparking at its contacts cannot ignite the ambient atmosphere, and operates by virtue of the magnetic influence of the magnet through the wall 17 of the chamber 6.
EP05105127A 2004-07-01 2005-06-10 Alarm call point Withdrawn EP1612756A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0414782A GB2415830B (en) 2004-07-01 2004-07-01 Call point

Publications (2)

Publication Number Publication Date
EP1612756A2 EP1612756A2 (en) 2006-01-04
EP1612756A3 true EP1612756A3 (en) 2006-12-27

Family

ID=32843412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05105127A Withdrawn EP1612756A3 (en) 2004-07-01 2005-06-10 Alarm call point

Country Status (2)

Country Link
EP (1) EP1612756A3 (en)
GB (1) GB2415830B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007020283A1 (en) 2007-04-30 2008-11-13 Robert Bosch Gmbh Signaling device with manual release
CN102867668B (en) * 2012-09-12 2014-08-06 广东电网公司江门供电局 Lock cylinder software type anti-misoperation mechanism for five-prevention 10kV switching cabinet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359719A (en) * 1980-10-06 1982-11-16 Honeywell Inc. Hall effect alarm pull station
EP0592925A1 (en) * 1992-10-13 1994-04-20 Siemens Aktiengesellschaft Hand hazard warning device
GB2370670A (en) * 2000-09-22 2002-07-03 Manhar Amlani Emergency signalling device incorporating an audible warning device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857679A (en) * 1986-11-20 1989-08-15 Bennett Brian S Alarm system
GB9017708D0 (en) * 1990-08-13 1990-09-26 Amlani Manher Signalling device
GB2401992B (en) * 2003-05-17 2006-12-13 Kac Alarm Company Ltd Call points

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359719A (en) * 1980-10-06 1982-11-16 Honeywell Inc. Hall effect alarm pull station
EP0592925A1 (en) * 1992-10-13 1994-04-20 Siemens Aktiengesellschaft Hand hazard warning device
GB2370670A (en) * 2000-09-22 2002-07-03 Manhar Amlani Emergency signalling device incorporating an audible warning device

Also Published As

Publication number Publication date
EP1612756A2 (en) 2006-01-04
GB2415830B (en) 2006-05-17
GB2415830A (en) 2006-01-04
GB0414782D0 (en) 2004-08-04

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