GB549826A - Improvements relating to electrically operated sound producing horns - Google Patents

Improvements relating to electrically operated sound producing horns

Info

Publication number
GB549826A
GB549826A GB712741A GB712741A GB549826A GB 549826 A GB549826 A GB 549826A GB 712741 A GB712741 A GB 712741A GB 712741 A GB712741 A GB 712741A GB 549826 A GB549826 A GB 549826A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
electrically operated
improvements relating
sound producing
horns
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
GB712741A
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.)
ZF International UK Ltd
Original Assignee
Joseph Lucas 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 Joseph Lucas Ltd filed Critical Joseph Lucas Ltd
Priority to GB712741A priority Critical patent/GB549826A/en
Publication of GB549826A publication Critical patent/GB549826A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

549,826. Diaphragm horns. LUCAS, Ltd., J., and LUCAS, O. June 5, 1941, No. 7127. [Class 13] A double-tone horn comprises a pair of air passages b designed to produce two tones of different pitch, a diaphragm g mounted over one end of each passage, and electromagnetic means for vibrating the diaphragms. The air passages b are formed in part by spiral grooves in opposite faces of a member a forming the body of the horn and in part by an extension e projecting from one side of the body and internally divided by a member f. Each groove b is closed by a flat plate c having a central aperture opposite the inner end of the groove. Each operating means comprises a coil j, core k, armature l secured to the diaphragm g, and an interrupter q.
GB712741A 1941-06-05 1941-06-05 Improvements relating to electrically operated sound producing horns Expired GB549826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB712741A GB549826A (en) 1941-06-05 1941-06-05 Improvements relating to electrically operated sound producing horns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB712741A GB549826A (en) 1941-06-05 1941-06-05 Improvements relating to electrically operated sound producing horns

Publications (1)

Publication Number Publication Date
GB549826A true GB549826A (en) 1942-12-09

Family

ID=9827136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB712741A Expired GB549826A (en) 1941-06-05 1941-06-05 Improvements relating to electrically operated sound producing horns

Country Status (1)

Country Link
GB (1) GB549826A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480261A (en) * 1946-03-15 1949-08-30 Lucas Ltd Joseph Electrically operable horn
DE1034520B (en) * 1955-05-05 1958-07-17 Rau Swf Autozubehoer Signal horn, especially for motor vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480261A (en) * 1946-03-15 1949-08-30 Lucas Ltd Joseph Electrically operable horn
DE1034520B (en) * 1955-05-05 1958-07-17 Rau Swf Autozubehoer Signal horn, especially for motor vehicles

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