GB808990A - Improvements in or relating to electrically operated acoustic signalling devices - Google Patents

Improvements in or relating to electrically operated acoustic signalling devices

Info

Publication number
GB808990A
GB808990A GB16231/56A GB1623156A GB808990A GB 808990 A GB808990 A GB 808990A GB 16231/56 A GB16231/56 A GB 16231/56A GB 1623156 A GB1623156 A GB 1623156A GB 808990 A GB808990 A GB 808990A
Authority
GB
United Kingdom
Prior art keywords
relating
electrically operated
signalling devices
diaphragms
acoustic signalling
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.)
Expired
Application number
GB16231/56A
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.)
CHARLES FRANCIS BELL
Original Assignee
CHARLES FRANCIS BELL
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 CHARLES FRANCIS BELL filed Critical CHARLES FRANCIS BELL
Publication of GB808990A publication Critical patent/GB808990A/en
Expired legal-status Critical Current

Links

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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

808,990. Diaphragm vibrators. BELL, C. F. May 25, 1956 [July 18, 1955], No. 16231/56. Class 13. [Also in Group XXXIX] In a diaphragm vibrator in which two diaphragms 1, 2 are rim clamped and mounted parallel to one another, each carries a ferro-magnetic plunger 9, 10 and a single energizing coil 12 effects the operation of both diaphragms. Perforated cores 6, 7 are provided for the diaphragms.
GB16231/56A 1955-07-18 1956-05-25 Improvements in or relating to electrically operated acoustic signalling devices Expired GB808990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ808990X 1955-07-18

Publications (1)

Publication Number Publication Date
GB808990A true GB808990A (en) 1959-02-18

Family

ID=19916214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16231/56A Expired GB808990A (en) 1955-07-18 1956-05-25 Improvements in or relating to electrically operated acoustic signalling devices

Country Status (1)

Country Link
GB (1) GB808990A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001588A1 (en) * 1991-07-12 1993-01-21 F.I.A.M.M. Componenti Accessori - F.C.A S.P.A. A motor-vehicle horn

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001588A1 (en) * 1991-07-12 1993-01-21 F.I.A.M.M. Componenti Accessori - F.C.A S.P.A. A motor-vehicle horn
US5420563A (en) * 1991-07-12 1995-05-30 F.I.A.M.M. Componenti Accessori-F.C.A. S.P.A. Motor-vehicle horn

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