GB252002A - Improvements in electro-dynamic devices adapted for use as microphones or loud-speaking apparatus - Google Patents

Improvements in electro-dynamic devices adapted for use as microphones or loud-speaking apparatus

Info

Publication number
GB252002A
GB252002A GB11868/26A GB1186826A GB252002A GB 252002 A GB252002 A GB 252002A GB 11868/26 A GB11868/26 A GB 11868/26A GB 1186826 A GB1186826 A GB 1186826A GB 252002 A GB252002 A GB 252002A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
pole
pieces
loud
winding
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
GB11868/26A
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.)
Societe des Etablissements Gaumont
Original Assignee
Societe des Etablissements Gaumont
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 Societe des Etablissements Gaumont filed Critical Societe des Etablissements Gaumont
Publication of GB252002A publication Critical patent/GB252002A/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
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane
    • H04R9/048—Construction in which the windings of the moving coil lay in the same plane of the ribbon type
    • 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

252,002. Soc. des Etablissements Gaumont. May 6, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Magnetic instruments; loud-speakers; diaphragms.-The diaphragm a, Fig. 1, of a microphone or loud speaker is formed as a ring of elastic insulating material, such as rubber, which is preferably corrugated and is covered by a winding of wire secured thereto by a suitable adhesive. The diaphragm and coil are supported in the air gap between the poles N, S of an electromagnet or permanent magnet by rubber bands c. In modifications, the diaphragm is formed of a triangular or rectangular shape and may be mounted on one or both of the pole-pieces by non- magnetic pegs. Figs. 6 and 7 show another form which the diaphragm may take, the supporting strips d being secured to the pole-pieces by screws e by means of which the tension of the diaphragm may be adjusted. Fig. 10 shows a construction in which two curved horns f are employed, one on each side of the diaphragm, so as to direct the sound in the same direction, When it is not desired to utilize the vibrations of the air produced in the interior of the diaphragm, these may be directed towards the external air through filters of felt or cotton by forming grooves g in the supports d, Figs. 6 and 7. or by forming channels in the pole-pieces. The diaphragm may be further supported by providing it on each face with a part which has no winding, as shown in dotted lines in Fig. 7.
GB11868/26A 1926-04-29 1926-05-06 Improvements in electro-dynamic devices adapted for use as microphones or loud-speaking apparatus Expired GB252002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR32649T 1926-04-29

Publications (1)

Publication Number Publication Date
GB252002A true GB252002A (en) 1926-07-29

Family

ID=8670348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11868/26A Expired GB252002A (en) 1926-04-29 1926-05-06 Improvements in electro-dynamic devices adapted for use as microphones or loud-speaking apparatus

Country Status (2)

Country Link
FR (2) FR609853A (en)
GB (1) GB252002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573399A (en) * 1968-08-14 1971-04-06 Bell Telephone Labor Inc Directional microphone

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744615C (en) * 1941-03-07 1944-01-21 Philips Nv Microphone for noisy surroundings
US2691148A (en) * 1950-06-24 1954-10-05 Rca Corp Ultrasonic transducer
US3564163A (en) * 1967-04-20 1971-02-16 Robert L Wathams Ribbon loudspeaker
US4317966A (en) * 1980-02-19 1982-03-02 Lister Clive R B Vibratory ribbon speaker
FR2521808A1 (en) * 1982-02-12 1983-08-19 Richard Rapp Robert Ribbon loudspeaker for HF sounds - has two magnetic poles defining air gap which contains electrically conducting ribbon
US4550228A (en) * 1983-02-22 1985-10-29 Apogee Acoustics, Inc. Ribbon speaker system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573399A (en) * 1968-08-14 1971-04-06 Bell Telephone Labor Inc Directional microphone

Also Published As

Publication number Publication date
FR32649E (en) 1928-02-14
FR609853A (en) 1926-08-25

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