GB1344717A - Electroacoustic device - Google Patents

Electroacoustic device

Info

Publication number
GB1344717A
GB1344717A GB3253371A GB3253371A GB1344717A GB 1344717 A GB1344717 A GB 1344717A GB 3253371 A GB3253371 A GB 3253371A GB 3253371 A GB3253371 A GB 3253371A GB 1344717 A GB1344717 A GB 1344717A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
contact breaker
july
contacts
arm
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
GB3253371A
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.)
Edwards Co Inc
Original Assignee
Edwards Co Inc
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 Edwards Co Inc filed Critical Edwards Co Inc
Publication of GB1344717A publication Critical patent/GB1344717A/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
    • G10K9/15—Self-interrupting arrangements

Landscapes

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

Abstract

1344717 Alarm buzzers EDWARDS CO Inc 12 July 1971 [10 July 1970] 32533/71 Heading G5J When the diaphragm 11 (Fig. 3) of an alarm moves it contacts and pushes an arm 17 to open the contacts 16 of a contact breaker. A resilient plastics pad 19 is provided on the arm and the contact breaker is adjustably mounted on the housing, a spring 31 biasing the contact breaker against the head of the screw 28. The diaphragm has a resonator 20 attached to it and a screw 23 determines the permitted amplitude of vibration of the diaphragm. A capacitor 32 is included to suppress arcing and a housing with a perforated cover 21 encloses the device.
GB3253371A 1970-07-10 1971-07-12 Electroacoustic device Expired GB1344717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5375470A 1970-07-10 1970-07-10

Publications (1)

Publication Number Publication Date
GB1344717A true GB1344717A (en) 1974-01-23

Family

ID=21986316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3253371A Expired GB1344717A (en) 1970-07-10 1971-07-12 Electroacoustic device

Country Status (2)

Country Link
US (1) US3656156A (en)
GB (1) GB1344717A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742493A (en) * 1971-12-06 1973-06-26 Edwards Co Audible signal apparatus
US3866203A (en) * 1971-12-06 1975-02-11 Edwards Company Inc Audible signal apparatus
US4142186A (en) * 1977-08-01 1979-02-27 P. R. Mallory & Co., Inc. Means for improving the electroacoustical properties of a buzzer
DE9320030U1 (en) * 1993-12-28 1995-05-18 Robert Bosch Gmbh, 70469 Stuttgart Electromagnetic signal device
JP3309037B2 (en) * 1995-08-17 2002-07-29 株式会社ミツバ Adjustment judgment method of horn for car
FR2910167A1 (en) * 2006-12-14 2008-06-20 Composants Electr Sa Soc D Horn for motor vehicle, has movable core coupled to oscillating membrane and defining air gap with fixed core, and casing enclosing ferromagnetic element forming shunt to channalize electromagnetic flux to confine flux near coil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1789947A (en) * 1924-12-22 1931-01-20 Sparks Withington Co Signaling device
US1729284A (en) * 1926-07-16 1929-09-24 North East Electric Co Electromagnetic horn
DE511295C (en) * 1928-10-31 1930-10-29 Eugen Grill Fa Electromagnetic horn
US2299671A (en) * 1940-10-28 1942-10-20 Gen Motors Corp Electromagnetic motor switch

Also Published As

Publication number Publication date
US3656156A (en) 1972-04-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee