GB705100A - Improvements in telephone instruments and microphones of the moving coil type - Google Patents

Improvements in telephone instruments and microphones of the moving coil type

Info

Publication number
GB705100A
GB705100A GB2304851A GB2304851A GB705100A GB 705100 A GB705100 A GB 705100A GB 2304851 A GB2304851 A GB 2304851A GB 2304851 A GB2304851 A GB 2304851A GB 705100 A GB705100 A GB 705100A
Authority
GB
United Kingdom
Prior art keywords
air
gaps
coil
microphones
moving
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
GB2304851A
Inventor
Joachim Wolff
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.)
FORTIPHONE Ltd
Original Assignee
FORTIPHONE 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 FORTIPHONE Ltd filed Critical FORTIPHONE Ltd
Priority to GB2304851A priority Critical patent/GB705100A/en
Publication of GB705100A publication Critical patent/GB705100A/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
    • 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

Landscapes

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

Abstract

705,100. Moving-coil instruments. FORTIPHONE, Ltd. Sept. 11, 1952 [Oct. 3, 1951],. No. 23048/51. Drawings to Specification. Class 40 (4) In a moving-coil telephone instrument the magnetic structure includes two aligned annular air-gaps, and a cylindrical former extends between and into both air-gaps, carrying a moving-coil in at least one air-gap, and being attached at both ends to flexible supports for endwise motion in the air-gaps. The embodiment has one coil in each of the air-gaps.
GB2304851A 1951-10-03 1951-10-03 Improvements in telephone instruments and microphones of the moving coil type Expired GB705100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2304851A GB705100A (en) 1951-10-03 1951-10-03 Improvements in telephone instruments and microphones of the moving coil type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2304851A GB705100A (en) 1951-10-03 1951-10-03 Improvements in telephone instruments and microphones of the moving coil type

Publications (1)

Publication Number Publication Date
GB705100A true GB705100A (en) 1954-03-10

Family

ID=10189262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2304851A Expired GB705100A (en) 1951-10-03 1951-10-03 Improvements in telephone instruments and microphones of the moving coil type

Country Status (1)

Country Link
GB (1) GB705100A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926221A (en) * 1957-11-21 1960-02-23 William A Kagdis Loudspeaker construction
US3055991A (en) * 1955-11-30 1962-09-25 Guss Reuben Loudspeaker
US3118125A (en) * 1959-06-18 1964-01-14 Claude C Sims Underwater sound transducer with sealed liquid coupling chamber
US3599020A (en) * 1970-02-27 1971-08-10 Ibm Linear actuator with alternating magnetic poles
FR2559332A1 (en) * 1984-02-02 1985-08-09 Ruelle Jean Louis Symmetric linear electromagnetic transducer.
US4783824A (en) * 1984-10-23 1988-11-08 Trio Kabushiki Kaisha Speaker unit having two voice coils wound around a common coil bobbin
US5337364A (en) * 1990-11-28 1994-08-09 Canadian Bionic Research Inc. Communication device for transmitting audio information to a user
US5446797A (en) * 1992-07-17 1995-08-29 Linaeum Corporation Audio transducer with etched voice coil
US5528697A (en) * 1991-05-17 1996-06-18 Namiki Precision Jewel Co., Ltd. Integrated vibrating and sound producing device
US5604815A (en) * 1992-07-17 1997-02-18 Linaeum Corporation Single magnet audio transducer and method of manufacturing
CN102378083A (en) * 2010-08-12 2012-03-14 郭建文 Dynamic damping middle/low-sound loudspeaker
EP2663092A2 (en) 2012-05-11 2013-11-13 Deben Acoustics Limited Acoustic device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055991A (en) * 1955-11-30 1962-09-25 Guss Reuben Loudspeaker
US2926221A (en) * 1957-11-21 1960-02-23 William A Kagdis Loudspeaker construction
US3118125A (en) * 1959-06-18 1964-01-14 Claude C Sims Underwater sound transducer with sealed liquid coupling chamber
US3599020A (en) * 1970-02-27 1971-08-10 Ibm Linear actuator with alternating magnetic poles
FR2559332A1 (en) * 1984-02-02 1985-08-09 Ruelle Jean Louis Symmetric linear electromagnetic transducer.
US4783824A (en) * 1984-10-23 1988-11-08 Trio Kabushiki Kaisha Speaker unit having two voice coils wound around a common coil bobbin
US5337364A (en) * 1990-11-28 1994-08-09 Canadian Bionic Research Inc. Communication device for transmitting audio information to a user
US5528697A (en) * 1991-05-17 1996-06-18 Namiki Precision Jewel Co., Ltd. Integrated vibrating and sound producing device
US5446797A (en) * 1992-07-17 1995-08-29 Linaeum Corporation Audio transducer with etched voice coil
US5604815A (en) * 1992-07-17 1997-02-18 Linaeum Corporation Single magnet audio transducer and method of manufacturing
CN102378083A (en) * 2010-08-12 2012-03-14 郭建文 Dynamic damping middle/low-sound loudspeaker
EP2663092A2 (en) 2012-05-11 2013-11-13 Deben Acoustics Limited Acoustic device

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