EP0085500A1 - Sonnerie électrique d'alarme - Google Patents

Sonnerie électrique d'alarme Download PDF

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Publication number
EP0085500A1
EP0085500A1 EP83300236A EP83300236A EP0085500A1 EP 0085500 A1 EP0085500 A1 EP 0085500A1 EP 83300236 A EP83300236 A EP 83300236A EP 83300236 A EP83300236 A EP 83300236A EP 0085500 A1 EP0085500 A1 EP 0085500A1
Authority
EP
European Patent Office
Prior art keywords
gong
motor
assembly
bell
striker
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Withdrawn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
EP83300236A
Other languages
German (de)
English (en)
Inventor
Peter Mitchell
Anthony Watkins
Frederick Judd
Michael Anderson
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.)
TANN-SYNCHRONOME Ltd
Original Assignee
TANN-SYNCHRONOME 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 TANN-SYNCHRONOME Ltd filed Critical TANN-SYNCHRONOME Ltd
Publication of EP0085500A1 publication Critical patent/EP0085500A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
    • G10K1/063—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a bell
    • G10K1/064—Operating or striking mechanisms therefor

Definitions

  • the present invention relates to an electrically driven alarm bell.
  • the pitch of the gong must be increased to an unacceptably high level.
  • British Patent Specification No. 1,600,808 describes and claims an electric bell comprising a bell body, a driving electric motor having a rotor, a piston plate fitted to oscilate between first and second end positions, said piston plate being drivingly connected to said motor whereby rotation of the motor is directly and continuously converted to oscilation of the plate, a reciprocally mounted hammer adapted to strike the bell body, at least one spring serving to drivingly couple the piston plate to the hammer whereby the hammer is driven in at least one direction under the resilience of the spring.
  • an alarm bell comprising a gong shaped to provide a housing portion, motor means having a rotary output shaft and disposed within said gong with its output shaft extending towards the periphery thereof,
  • the gong is preferably circular and is adapted to be secured by means of a central fastening.
  • the motor is preferably mounted with its rearward end at or towards the centre line of the gong and its output shaft at the forward end, substantially perpendicular thereto, i.e. disposed along the gong radius.
  • the motor may be supported by means of a support assembly and associated motor clamp which locates the motor securely in position, said support assembly including means for attachment of the bell gong thereto.
  • the support assembly may include a pair of opposed blind bores adapted to receive a lay shaft accommodating a striker assembly, said lay shaft being in substantially spaced parallel relationship with the centre line of the gong.
  • the output shaft of the motor may be provided with a pinion which meshes with the teeth of an angled gear whereby rotation of the upward shaft to the motor is transmitted to the corresponding sub-assembly of the striker sub-assembly.
  • the alarm bell 10 comprises a base 11 having a peripheral edge wall 12 defining the circular , extremity of base 11, edge wall 12 being configured to provide an upstanding annular rim portion 13 and a frustoconical intermediate portion 14.
  • the base 11 has an upstanding gong support 15 defined by an upstanding wall 16 and a substantially planar portion 17 having a central threaded bore 18 and a peripheral rubber cushion 19.
  • the extremity of planar portion 17 remote from wall 16 is provided with a downwardly inclined portion 20 which terminates in an extremity portion 21 extending in substantially spaced parallel relationship with the base line 22 of the bell assembly.
  • the extremity portion is provided with a blind bore 23 directed towards said base line 22.
  • the base 11 co-operates with a motor clamp assembly 25 comprising a base plate 26 which latter is disposed generally contiguous the base 11 whereby the base 11 and the base plate 26 together define the base line 22 of the bell assembly.
  • the base plate 26 extends generally beneath the planar portion 17 in a direction away from the wall 16 and is provided in register with blind bore 23 with an upwardly directed blind bore 27 which together with blind bore 23 define journals for a shaft 28.
  • Base plate 25 terminates inwardly of the line defined by wall 16 and serves to provide a base opening 29.
  • the motor clamp assembly 25 serves to secure locate and clamp a motor 30 with its output shaft 31 disposed radially of the centre line 32 of the bell.
  • the output shaft 31 carries a pinion 33;
  • shaft 28 carries a pair of spaced discs 34 mounted concentrically on shaft 28, each disc having on its face remote from the other, a ring of gear teeth 35, one set of which are adapted to engaged with pinion 33 whereby rotation of the output shaft 31 of motor 30 drives via pinion 33 and gear teeth 35 disc 34 for rotation about the axis of shaft 28.
  • Each of discs 34 carries towards the periphery thereof a spigot (not shown) in spaced parallel relationship with shaft 28 and adapted to engage with the adjacent disc, said spigots being diametrically disposed one with respect to the other.
  • Each spigot carries a striker member 36 which is substantially cylindrical and has a central bore of approximately twice the diameter of the spigot on which it is mounted, the arrangement being such that each striker member 36 is capable of rotation about its associated spigot and is carried in floating relationship therewith.
  • Central threaded bore 18 is adapted to receive a captive screw 40 for securing a gong 41 to planar portion 17 of gong support 15 so that the gong is retained by screw 40 against cushion 19.
  • the gong has a central planar portion 42 and an annular convex portion 43 which terminates in inwardly extending frustoconical side wall 44.
  • Side wall 44 has, juxtaposed strikers 36, an inwardly directed impact blister 45.
  • the gong 41 is preferably a one-piece pressing from sheet steel and each of the base 11 and the motor clamp assembly are preferably formed from glass fibre reinforced polypropylene or glass fibre reinforced polyethylene.
  • the electric motor 30 is connected via the terminal block assembly mounted in juxtaposition with gong support 15 with the current supply wires which enter the alarm bell by means of the base opening 29. Energisation of the motor 30 results in rotation of the shaft 31 which drives the discs 34 at a predetermined rate of rotation so that the strikers 36 swing outwardly to the limit of their "float” and serve to strike the impact blister 45 at the periphery of the gong 41 thereby sounding the alarm bell.
  • the relatively short radius between the axis of shaft 28 and the periphery of each of strikers 36 at the extremity of their float serves to limit the centrifugal force and hence the circumferential velocity of each striker and therefore reduces the actual impact of the striker upon the impact blister 45 without reducing to any significant extent the volume of the alarm bell in operation.
  • the pitch of the note of the alarm bell is, of course, determined by the dimensions of the gong 41.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Emergency Alarm Devices (AREA)
EP83300236A 1982-01-21 1983-01-18 Sonnerie électrique d'alarme Withdrawn EP0085500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08201676A GB2118350A (en) 1982-01-21 1982-01-21 Alarm bell
GB8201676 1982-01-21

Publications (1)

Publication Number Publication Date
EP0085500A1 true EP0085500A1 (fr) 1983-08-10

Family

ID=10527768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83300236A Withdrawn EP0085500A1 (fr) 1982-01-21 1983-01-18 Sonnerie électrique d'alarme

Country Status (3)

Country Link
EP (1) EP0085500A1 (fr)
DK (1) DK22783A (fr)
GB (1) GB2118350A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1025527A (fr) * 1950-10-05 1953-04-16 Anciens Etablissements Paul Ma Timbre pour cycles et engins analogues
FR1050122A (fr) * 1952-02-02 1954-01-05 Timbre pour bicyclettes
GB2074772A (en) * 1980-04-22 1981-11-04 Kobishi Electric Co Ltd Gong striking mechanisms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305066A (en) * 1979-07-31 1981-12-08 Kobishi Electric Co., Ltd. Motor driven bell sound generating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1025527A (fr) * 1950-10-05 1953-04-16 Anciens Etablissements Paul Ma Timbre pour cycles et engins analogues
FR1050122A (fr) * 1952-02-02 1954-01-05 Timbre pour bicyclettes
GB2074772A (en) * 1980-04-22 1981-11-04 Kobishi Electric Co Ltd Gong striking mechanisms

Also Published As

Publication number Publication date
DK22783A (da) 1983-07-22
GB2118350A (en) 1983-10-26
DK22783D0 (da) 1983-01-20

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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

Designated state(s): AT BE CH DE FR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840116

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JUDD, FREDERICK

Inventor name: ANDERSON, MICHAEL

Inventor name: WATKINS, ANTHONY

Inventor name: MITCHELL, PETER