GB451664A - Improvements in and relating to loud speakers - Google Patents

Improvements in and relating to loud speakers

Info

Publication number
GB451664A
GB451664A GB414235A GB414235A GB451664A GB 451664 A GB451664 A GB 451664A GB 414235 A GB414235 A GB 414235A GB 414235 A GB414235 A GB 414235A GB 451664 A GB451664 A GB 451664A
Authority
GB
United Kingdom
Prior art keywords
loud
relating
former
loud speakers
cone
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
GB414235A
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
Priority to BE413710D priority Critical patent/BE413710A/fr
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB414235A priority patent/GB451664A/en
Priority to FR47049D priority patent/FR47049E/en
Publication of GB451664A publication Critical patent/GB451664A/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
    • H04R9/06—Loudspeakers

Abstract

451,664. Loud - speakers. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London, and MOIR, J., 24, Lawrence Road, Rugby. Feb. 8, 1935, No. 4142. [Class 40 (iv)] A moving-coil loud-speaker has a paper cone 3 secured to a metal former 1 carrying the driving coil 2, and a small metal cone 4 integral with, or in continuous metallic contact with the former. Specification 405,754 is referred to.
GB414235A 1925-01-09 1935-02-08 Improvements in and relating to loud speakers Expired GB451664A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE413710D BE413710A (en) 1925-01-09
GB414235A GB451664A (en) 1935-02-08 1935-02-08 Improvements in and relating to loud speakers
FR47049D FR47049E (en) 1925-01-09 1936-02-06 Improvements to sound-producing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB414235A GB451664A (en) 1935-02-08 1935-02-08 Improvements in and relating to loud speakers

Publications (1)

Publication Number Publication Date
GB451664A true GB451664A (en) 1936-08-10

Family

ID=9771546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB414235A Expired GB451664A (en) 1925-01-09 1935-02-08 Improvements in and relating to loud speakers

Country Status (1)

Country Link
GB (1) GB451664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315112A (en) * 1979-12-12 1982-02-09 Alan Hofer Speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315112A (en) * 1979-12-12 1982-02-09 Alan Hofer Speaker

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