GB248122A - Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus - Google Patents

Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus

Info

Publication number
GB248122A
GB248122A GB3001424A GB3001424A GB248122A GB 248122 A GB248122 A GB 248122A GB 3001424 A GB3001424 A GB 3001424A GB 3001424 A GB3001424 A GB 3001424A GB 248122 A GB248122 A GB 248122A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
magnetic
electromagnetic
core
casing
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
GB3001424A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3001424A priority Critical patent/GB248122A/en
Publication of GB248122A publication Critical patent/GB248122A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Abstract

248,122. British Thomson-Houston Co., Ltd., and Hutt, J. Dec. 13, 1924. Diaphragms; magnetic instruments.-Electromagnetic or electrodynamic sound emitting apparatus comprises a diaphragm supported at its centre, the motive force being applied at its periphery. The diaphragm 17 of a loud speaker is clamped between flexible washers 18 to a core 11. The edge of the diaphragm is provided with a flange 21 on which is wound the actuating coil 22 located in the gap between the pole pieces 12, 15. The magnetic circuit is excited by a coil 16 on the core 11 and enclosed in a magnetic casing 14. In another form, the central core is a permanent magnet mounted in a cup-shaped magnetic casing supported by a chain and carrying the actuating coil. The periphery of the diaphragm is spaced slightly from an outer flange of the casing serving as the outer pole of the magnetic circuit.
GB3001424A 1924-12-13 1924-12-13 Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus Expired GB248122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3001424A GB248122A (en) 1924-12-13 1924-12-13 Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3001424A GB248122A (en) 1924-12-13 1924-12-13 Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus

Publications (1)

Publication Number Publication Date
GB248122A true GB248122A (en) 1926-03-04

Family

ID=10300866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3001424A Expired GB248122A (en) 1924-12-13 1924-12-13 Improvements in and relating to electromagnetic and electrodynamic sound-emitting and converting apparatus

Country Status (1)

Country Link
GB (1) GB248122A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473721A (en) * 1981-04-01 1984-09-25 Siegfried Klein High-frequency loud speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473721A (en) * 1981-04-01 1984-09-25 Siegfried Klein High-frequency loud speaker

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