GB312756A - Improvements in and relating to electrically operated loud speakers - Google Patents

Improvements in and relating to electrically operated loud speakers

Info

Publication number
GB312756A
GB312756A GB1099328A GB1099328A GB312756A GB 312756 A GB312756 A GB 312756A GB 1099328 A GB1099328 A GB 1099328A GB 1099328 A GB1099328 A GB 1099328A GB 312756 A GB312756 A GB 312756A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
relating
poles
coils
electrically operated
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
GB1099328A
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.)
O&S Bearing Co
Original Assignee
O&S Bearing Co
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 O&S Bearing Co filed Critical O&S Bearing Co
Priority to GB1099328A priority Critical patent/GB312756A/en
Publication of GB312756A publication Critical patent/GB312756A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

312,756. Dufort, C. J. Nesbitt-, and O. & S. Oilless Bearing Co., Ltd. April 13, 1928. Loud-speakers; magnetic instruments; diaphragms.-A moving-coil loud-speaker is provided with a, plurality of coils a, Fig. 1, attached to a diaphragm b of card, metal foil, moulded material &c., the diaphragm, in addition to being suspended by peripheral strips of thin leather b' in a suitable frame f, being also centred by a light tube or rod g secured to the centre of the diaphragm and after passing through the magnet system, connected to a spider or string system h, Fig. 3. The coils, which may be connected in series or parallel, project into gaps d formed between the poles of opposite polarity of a compound electromagnet or permanent magnet, e being the common pole of one polarity and c<1> - - e<4> the poles of opposite polarity.
GB1099328A 1928-04-13 1928-04-13 Improvements in and relating to electrically operated loud speakers Expired GB312756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1099328A GB312756A (en) 1928-04-13 1928-04-13 Improvements in and relating to electrically operated loud speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1099328A GB312756A (en) 1928-04-13 1928-04-13 Improvements in and relating to electrically operated loud speakers

Publications (1)

Publication Number Publication Date
GB312756A true GB312756A (en) 1929-06-06

Family

ID=9978059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1099328A Expired GB312756A (en) 1928-04-13 1928-04-13 Improvements in and relating to electrically operated loud speakers

Country Status (1)

Country Link
GB (1) GB312756A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789161A (en) * 1951-04-05 1957-04-16 Joseph B Brennan Loud-speakers
DE2850956A1 (en) * 1977-11-26 1979-05-31 Sony Corp SPEAKER
FR2433881A1 (en) * 1978-08-14 1980-03-14 Sony Corp LOUD SPEAKER
US4379951A (en) * 1977-04-20 1983-04-12 Gabr Saad Z M Electro-acoustic transducer means
GB2347818A (en) * 1999-03-10 2000-09-13 Steff Lin Flat type loud speaker
US11388517B2 (en) 2018-10-01 2022-07-12 Grawe & Schneider Gdbr Planar loudspeaker

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789161A (en) * 1951-04-05 1957-04-16 Joseph B Brennan Loud-speakers
US4379951A (en) * 1977-04-20 1983-04-12 Gabr Saad Z M Electro-acoustic transducer means
DE2850956A1 (en) * 1977-11-26 1979-05-31 Sony Corp SPEAKER
US4191863A (en) * 1977-11-26 1980-03-04 Sony Corporation Support for multi-point magnetic driver loudspeaker
FR2433881A1 (en) * 1978-08-14 1980-03-14 Sony Corp LOUD SPEAKER
GB2347818A (en) * 1999-03-10 2000-09-13 Steff Lin Flat type loud speaker
US11388517B2 (en) 2018-10-01 2022-07-12 Grawe & Schneider Gdbr Planar loudspeaker

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