SE543110C2 - Safety device for a fire detector - Google Patents

Safety device for a fire detector

Info

Publication number
SE543110C2
SE543110C2 SE1851321A SE1851321A SE543110C2 SE 543110 C2 SE543110 C2 SE 543110C2 SE 1851321 A SE1851321 A SE 1851321A SE 1851321 A SE1851321 A SE 1851321A SE 543110 C2 SE543110 C2 SE 543110C2
Authority
SE
Sweden
Prior art keywords
battery
lock
housing
fire
battery holder
Prior art date
Application number
SE1851321A
Other languages
Swedish (sv)
Other versions
SE1851321A1 (en
Inventor
Michael Olsson
Mikael Rydle
Rickard Grönstedt
Original Assignee
O&G Res & Development Ab
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 O&G Res & Development Ab filed Critical O&G Res & Development Ab
Priority to SE1851321A priority Critical patent/SE543110C2/en
Priority to EP19794507.4A priority patent/EP3871203A1/en
Priority to PCT/EP2019/078937 priority patent/WO2020084010A1/en
Publication of SE1851321A1 publication Critical patent/SE1851321A1/en
Publication of SE543110C2 publication Critical patent/SE543110C2/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • 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
    • G08B29/18—Prevention or correction of operating errors
    • 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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/181—Prevention or correction of operating errors due to failing power supply
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Fire Alarms (AREA)

Abstract

There is provided a fire warning device (1) that comprises a housing (2) formed by two shell parts (3a, 3b) being connectable with a lock (4) to form a closed housing (2), where the fire warning device (1) comprises a friction anchoring device (5) disposed in a passageway (6) that extends between two mutually opposite ends (7, 8) of the closed housing (2), such as to enable the housing (2) to be closed around a cable, rod or chain (9) for suspending the fire warning device (1) , the fire warning device (1) comprising a fire sensor (10) , said fire sensor (10) being connectable to a battery (11) to power the fire sensor (10), the fire warning device (1) comprising a battery holder (13) arranged to receive a battery (11) with a predetermined size, and a safety device (14) comprising a safety spring (15) with a lockblocking part (16) that is blocking the lock (4) when there is no battery (11) in the battery holder (13), thereby preventing the housing (2) from closing, and where said lock-blocking part (16) is removed from the lock (4) when a battery (11) is placed in the battery holder (13), to enable closing of the lock (4).

Description

Safety device for a fire detector Field of the invention This invention relates to a fire alarm, such as a smoke detector, in particular a smoke de- tector that can be attached to a cable, rod or a chain.
Background Smoke detectors for household use are typically puck-shaped devices that are attached tothe ceiling with the use of screws. Installation is somewhat cumbersome as holes must bedrilled into the ceiling and the detector is then screwed into place. For the average home- owner it is somewhat cumbersome to stand on a ladder and work on the ceiling.
EP1038280 describes as innovative type of fire detector that can be attached to the cableof a hanging lamp. lt consists of two shell parts that can be closed around the cable so thatthe smoke detector is suspended by the cable. This provides simple installation since it is not necessary to drill and screw into the ceiling. lt is important that a user is aware ifthere is no battery power in the fire alarm. Otherwisea user may think that the alarm is working although it really is not. For this reason, firealarms often make a sound when the battery is approaching is end of life, indicating thatthe battery needs to be changed. However, it is also necessary to make a user aware thatthere is no battery at all in the device. Otherwise a user may install the device with no bat- tery, which would be dangerous.
A second problem is that it should be easy to change the battery in the fire detector.
Summary of invention ln a first aspect of the invention there is provided a fire warning device that comprises ahousing formed by two she|| parts being connectable with a lock to form a closed housing,where the fire warning device comprises a friction anchoring device disposed in a passage-way that extends between two mutually opposite ends of the closed housing, such as toenable the housing to be closed around a cable, rod or chain for suspending the fire warn-ing device, the fire warning device comprising a fire sensor, said fire sensor being connect-able to a battery to power the fire sensor, and a battery holder arranged to receive a bat-tery with a predetermined size, and a safety device comprising a safety spring with a lock-blocking part that is blocking the lock when there is no battery in the battery holder,thereby preventing the housing from closing, and where said lock-blocking part is re-moved from the lock when a battery is placed in the battery holder, to enable closing of the lock. This a convenient way to arrange a battery safety device in this type of fire alarm.
The battery may press on the safety spring when it is placed in the battery holder. For ex-ample, the battery may urge the safety spring into a she|| part thereby moving the lock-blocking part of the safety spring away from the lock when it is placed in the batteryholder.
The battery holder may comprise a flexing hook that urges the battery into a predeter-mined position to lock the battery in the battery holder, and where the flexing hook andthe safety spring is formed in one part. This is a particularly convenient to arrange the safety spring and the flexing hook. The spring may be a metal wire spring.
The look blocking part may comprise a metal wire loop that is urged against the interior of the she||. ln a second aspect of the invention there is provided a fire warning device that comprisesa housing formed by two she|| parts being connectable with a lock to form a closed hous- ing, the fire warning device comprising a fire sensor, the fire warning device further comprising a friction anchoring device disposed in a passageway that extends betweentwo mutually opposite ends ofthe closed housing, such as to enable the housing to beclosed around a cable, rod or chain for suspending the fire warning device, where the fric-tion anchoring device can be closed around the cable, rod or chain separately from thehousing. This has the advantage that that the housing can be opened while the device isstill attached to the cable, chain or rod, and enables change of battery without moving thedevice from its place on the cable. Preferably, the housing is able to close around the fric- tion anchoring device. ln one embodiment, the friction anchoring device may be a clamp comprising a first partand a second part, where the cable, rod or chain can be clamped between the first partand the second part, where the clamp can be opened and closed separately from thehousing. The clamp and the housing may open in the same direction. The first and the sec- ond parts of the clamp may be urged together by a clamping spring.
One of the clamp parts may be fixed in relation to one shell part so that it does not movein relation to the shell part. This has the advantage of making it easier to open the clampand the housing when attaching the device to a cable. lt is preferred that a battery holder is located in the shell part that is not fixed together with the clamp part.
Drawings The accompanying drawings form a part of the specification and schematically illustratepreferred embodiments of the invention, and serve to illustrate the principles of the inven- tion.
Fig. 1 shows a fire warning device where the housing is open.Fig. 2 shows the fire warning device where the housing is closed.Fig. 3 shows a fire warning device without battery.
Fig. 4. shows a fire warning device with battery.
Figs. 5 and 6 are sections of a part of a fire warning device, with and without battery.
Fig. 7 is a section of a part of a fire warning device in the open state.Fig. 8 is a section of a part of a fire warning device in the closed state.
Fig. 9 shows a metal spring.
Detailed description Figs. 1 to 9 shows one embodiment of a fire warning device. The fire warning device 1 com-prises a housing 2 formed by two shell parts 3a 3b. The two shell parts are connected withhinge 18 and are connectable with a lock 4 formed by parts 4a 4b. Lock parts 4a 4b canreversibly attach to each other to form a closed housing 2. Lock parts 4a 4b may for examplesnap together. The fire warning device 1 comprises a friction anchoring device disposed ina passageway 6 that extends between two mutually opposite ends 7, 8 ofthe closed housing2, such as to enable the housing 2 to be closed around a cable, rod or chain 9 (referred toas cable 9 herein) for suspending the device 1. The anchoring device may for example be aclamp 5 able to clamp onto the cable 9. Preferably the anchoring device is reversibly at-tached to cable 9. The fire warning device 1 can therefore easily be attached the cable 9,for example the cable 9 of a lamp that is suspended from a ceiling in the cable 9. Thereby,the device 1 is easy to install as it is not necessary to drill holes in the ceiling. lt is also easy to remove the device 1 from the cable 9.
The fire warning device 1 comprising a fire sensor 10 which preferably is a smoke detectoras is known in the art. The fire sensor 10 is connectable to a battery 11 to power the firesensor 10 via cable 12. The cable 12 may be connectable to the battery 11 with connector24. The fire sensor 10 is able to detect fire, for example by detecting heat or smoke, and then trigger a sound alarm to alert persons in the house.
The fire warning device 1 comprises a battery holder 13 arranged to receive a battery 11with a predetermined size. Often a disposable battery such as a PP3 battery (often referredto as a ”9-volt battery"), is used. Preferable battery holder 13 is be arranged to receive the battery 11 in a predetermined direction.
The housing 2 encloses the other parts of the device 1, including the friction anchoring de-vice, fire warning sensor 10, battery 11, battery holder 13, cable 12, connector 24 and safetydevice 14. Preferably the housing 2 has apertures 27 as inlets for ambient air, thereby al-lowing smoke to come in contact with the fire detector 10. Clamp parts 20, 21 may have at least one aperture 25 for allowing of circulation of air inside the device 1.
The friction anchoring device may be of the type shown in EP103828 which engages thecable 9 upon closing of the housing 2 (not shown in the Figs. 1-9). However, in a preferredembodiment, shown in Figs. 1-9, the friction anchoring device may be such that it can beclosed around the cable 9 separately from the housing 2. The friction anchoring device maybe a clamp 5 comprising a first part 20 and a second part 21, where the cable 9 is clampedbetween the first part 20 and the second part 21. The first 20 and second parts 21 of theclamp 5 may be urged together to a closed state by a spring 19. The clamp 5 can preferablybe opened by hand. The clamp 5 may preferably have a hinge 22 that connects first part 20and second part 21. ln one embodiment the clamp 5 and the housing 2 opens in the same direction. Hinge 22 of clamp 5 and hinge 18 of housing 2 may be parallel.
Preferably the clamp 5 distributes force from spring 19 along a length of contact betweenclamp 5 and cable 9, where the cable 9 is kept straight. This prevents the formation of kinksin cable 9. lt is also preferred that the anchoring device does not make it necessary for thecable 9 to turn or make kinks. Ugly kinks are prone to remain even after the device 1 isremoved from the cable 9, in particular if the device 1 has been hanging on the cable 9 for a long time. ln one embodiment, one of the first part 20 and second part 21 of clamp 5 can be fixed inrelation to one of shell 3a, 3b so that it does not move in relation to the shell part. Attach-ment makes second clamp part 21 and shell part 3b behave as one part. Below it is describedhow second clamp part 21 is fixed in relation to shell part 3b, such that it cannot swingseparately from shell part 3b. This simplifies installation, because the user can then openthe clamp 5 by grabbing one shell 3b part with one hand and the other shell 3 and the clamp part 20 with the other hand and then pry the clamp 5 apart. lt is preferred that second clamp part 21 that is closest to the she|| part 3b that does notcomprise the battery holder 13 is attached to the she|| part 3b. The fixation of clamp part21 in relation to she|| part 3b may be permanent. Clamp part 21 may be attached to she||part 3b in a suitable way. For example, this may be achieved with locking mechanism 23.
Alternatively, one clamp part 21 can for example be glued together with the she|| part 3b.
The fire warning device 1 may preferably further comprises a safety device 14 that preventsthe closing of the housing 2 when there is no battery 11 installed in the battery holder 13.The safety device 14 comprises a safety spring 15 with a lock-blocking part 16 that is block-ing the lock 4 when there is no battery 11 in the battery holder 13, thereby preventing the housing 2 from closing. The battery 11 may interact directly with the safety spring 15. ln a preferred embodiment the safety spring 15 interferes with a lock part 4a of the she||part 3a where the battery holder 13 is located. The lock-blocking part 16 of safety spring 15moves away from the lock part 4a when a battery 11 is placed in the battery holder 13, to enable closing of the lock 4.
The safety device 14 may be configured so that the battery 11 presses on the safety spring15 when the battery 14 is placed in the battery holder 13. The battery 11 thereby urges thelock-blocking part 16 of the safety spring 15 away from the lock 4, for example lock part 4aor 4b. When the battery 11 is removed, the lock blocking part 16 moves towards lock 4 and interferes with lock 4 so that it cannot be closed.
Thus, when a battery 11 is placed in the battery holder 13, the device 1 can be closed arounda lamp cable 9, but when there is no battery 11 in the battery holder 13, the housing 2cannot be locked in the closed position and remains open. lf device 1 has a friction anchor-ing device that closes separately from housing (such as a clamp 5, described above) thedevice 1 can still be attached to cable 9, in its open state, but housing 2 cannot be closed.The fact that the open (non-closable) device 1 hangs visible on the cable 9 provides a re- minder to the user to install a battery 11 in the device 1. ln another embodiment (not shown in Figs. 1-9) closing of the lock 4 of housing 2 is neces-sary for attaching the device 1 to the cable 9, and the friction anchoring device cannot beclosed independently of the housing 2. Here, the device 1 cannot be attached to the cable 9 without installing a battery 11. This also provides a safety warning to the user.
The lock-blocking part 16 may be a metal wire loop that is urged against the interior of theshell 3a. Figs. 5 and 7 show how the lock blocking part 16 rests against lock part 4a therebypreventing lock part 4b to snap into place. Placing the battery 11 in the battery holder 13forces spring 15 into shell 3a, thereby causing lock blocking part away from lock part 4b asseen in Figs 6 and 8. This allows lock part 4a to snap together with lock part 4b to close the housing 2.
Thus safety spring 15 may have a first position where the lock 4 cannot be closed and asecond position where the lock 4 can be closed, and where the insertion of the battery 11into the battery holder 13 causes the safety spring 15 to move from the first position to thesecond position, and where removal of the battery 11 causes the safety device 14 to move from the second position to the first position.
The battery holder 13 may comprise a flexing hook 17 that urges the battery 11 into a fixedposition. Battery holder 13 may also comprise battery supports 26. ln the embodimentshown in Figs. 1 to 9 battery 11 is clamped between flexing hook 17 and battery supports 26. Flexing hook 17 is preferably adapted to the predetermined size ofthe battery 11.
The flexing hook 17 and the spring 15 may be made in one part, for example a metal wire.ln Figs. 1 to 9 flexing hook 17 and spring 15 is made by one piece of metal wire. Fig. 9 showthe metal wire spring that constitutes spring 15 (with lock-blocking part 16) and flexing hook 17. The metal wire provides flex for spring 15 and flexing hook 17.
While the invention has been described with reference to specific exemplary embodiments, the description is in general only intended to illustrate the inventive concept and should not be taken as limiting the scope of the invention. The invention is generally defined by the claims.

Claims (5)

CLAll\/IS
1. WA fire warning device (1) that comprises a housing (2) formed by two shell parts (3a,
2.
3.
4. 3b) being connectable with a lock (4) to form a closed housing (2), where the firewarning device (1) comprises a friction anchoring device (5) disposed in a passage-way (6) that extends between two mutually opposite ends (7, 8) of the closed hous-ing (2), such as to enable the housing (2) to be closed around a cable, rod or chain(9) for suspending the fire warning device (1), the fire warning device (1) comprisinga fire sensor (10), said fire sensor (10) being connectable to a battery (11) to powerthe fire sensor (10), and a battery holder (13) arranged to receive a battery (11) witha predetermined size, and a safety device (14) comprising a safety spring (15) with alock-blocking part (16) that is blocking the lock (4) when there is no battery (11) inthe battery holder (13), thereby preventing the housing (2) from closing, and wheresaid lock-blocking part (16) is removed from the lock (4) when a\{§._§j¿_:j¿__battery (11) isplaced in the battery holder (13), to enable closing ofthe lock (4),characterized in that the battery holder (13) comprises a flexing hook (17) that urges the battery (11) intoa predetermined position to lock the battery (11) in the battery holder (13), andwhere the flexing hook (17) and the safety spring (15) lí-si-ggggjggggformed in one part.The device of claim 1 where the battery (11) presses on the safety spring (15) when it is placed in the battery holder (13).The device of claim 1 or 2 where the battery (11) urges the safety spring (15) into ashell part (3a) thereby moving the lock-blocking part (16) of the safety spring (15)away from the lock (4) when it is placed in the battery holder (13). The device of any one of claims 1 to 3 where the i ggg-ivspring metal wire spring.
5. The device according to claim 4 where the lock-blocking part icomprises a metal wire loop that is urged against the interior of the she||_='
SE1851321A 2018-10-25 2018-10-25 Safety device for a fire detector SE543110C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE1851321A SE543110C2 (en) 2018-10-25 2018-10-25 Safety device for a fire detector
EP19794507.4A EP3871203A1 (en) 2018-10-25 2019-10-23 Safety device for a fire detector
PCT/EP2019/078937 WO2020084010A1 (en) 2018-10-25 2019-10-23 Safety device for a fire detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1851321A SE543110C2 (en) 2018-10-25 2018-10-25 Safety device for a fire detector

Publications (2)

Publication Number Publication Date
SE1851321A1 SE1851321A1 (en) 2020-04-26
SE543110C2 true SE543110C2 (en) 2020-10-06

Family

ID=68344843

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1851321A SE543110C2 (en) 2018-10-25 2018-10-25 Safety device for a fire detector

Country Status (3)

Country Link
EP (1) EP3871203A1 (en)
SE (1) SE543110C2 (en)
WO (1) WO2020084010A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881063A (en) * 1989-01-30 1989-11-14 Ei Company, Ltd. Battery removal indicator
US5820406A (en) * 1996-07-29 1998-10-13 Hetherington; Michael Warnett Terminal and door latch for battery operated devices
SE512409C2 (en) 1997-12-11 2000-03-13 Rickard Groenstedt Suspension for fire alarms
EP1768075A1 (en) * 2005-09-22 2007-03-28 Tophat ApS Alarm device and housing for an alarm device

Also Published As

Publication number Publication date
EP3871203A1 (en) 2021-09-01
WO2020084010A1 (en) 2020-04-30
SE1851321A1 (en) 2020-04-26

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