GB353202A - Improvements in or relating to electro-acoustic apparatus - Google Patents

Improvements in or relating to electro-acoustic apparatus

Info

Publication number
GB353202A
GB353202A GB19016/30A GB1901630A GB353202A GB 353202 A GB353202 A GB 353202A GB 19016/30 A GB19016/30 A GB 19016/30A GB 1901630 A GB1901630 A GB 1901630A GB 353202 A GB353202 A GB 353202A
Authority
GB
United Kingdom
Prior art keywords
june
constituted
class
core
coil
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
GB19016/30A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB353202A publication Critical patent/GB353202A/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
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers

Landscapes

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

Abstract

353,202. Loud-speakers. LEVY, L., 5, Rue du Cirque, Paris. June 21, 1930, No. 19016. Convention date, June 21, 1929. [Class 40 (iv).] An electroacoustic device, such as a loudspeaker, comprises a metallic cylinder 8 of copper or aluminium secured to the base of a frustoconical diaphragm 7 and located in the gap formed between the poles 2, 3 of an electromagnet 1, the fixed coil 6 which receives the speech currents being wound on the end of the core 2. This core is preferably provided with radial slots or constituted by juxtaposed iron sheets and the magnetic air gap may be reduced by forming the coil 6 of magnetic wire, such as iron, nickel or alloys. If desired, a non-radial field may be employed, the movable member 8 being constituted by a flat metallic ring. Reference has been directed by the Comptroller to Specifications 18765/13, 131,041, 217,056, 246,556, 253,159, 295,342 and 308,318, [all in Class 40 (iv), Telephones &c.].
GB19016/30A 1929-06-21 1930-06-21 Improvements in or relating to electro-acoustic apparatus Expired GB353202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR696762T 1929-06-21

Publications (1)

Publication Number Publication Date
GB353202A true GB353202A (en) 1931-07-23

Family

ID=9046781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19016/30A Expired GB353202A (en) 1929-06-21 1930-06-21 Improvements in or relating to electro-acoustic apparatus

Country Status (2)

Country Link
FR (1) FR696762A (en)
GB (1) GB353202A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118398A (en) * 1982-04-14 1983-10-26 Boaz Elieli Moving coil electroacoustic transducers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118398A (en) * 1982-04-14 1983-10-26 Boaz Elieli Moving coil electroacoustic transducers

Also Published As

Publication number Publication date
FR696762A (en) 1931-01-07

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