GB438090A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

Publication number
GB438090A
GB438090A GB33527/34A GB3352734A GB438090A GB 438090 A GB438090 A GB 438090A GB 33527/34 A GB33527/34 A GB 33527/34A GB 3352734 A GB3352734 A GB 3352734A GB 438090 A GB438090 A GB 438090A
Authority
GB
United Kingdom
Prior art keywords
ribbon
nov
tortuous
passageway
microphone
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
GB33527/34A
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.)
Marconis Wireless Telegraph Co Ltd
Original Assignee
Marconis Wireless Telegraph 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
Application filed by Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB438090A publication Critical patent/GB438090A/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
    • H04R9/08—Microphones

Landscapes

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

Abstract

438,090. Microphones. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.- (Assignees of Olson, H. F. ; 920, Stokes Avenue, Collingswood, New Jersey, U.S.A.) Nov. 21, 1934, No. 33527. Convention date, Nov. 21, 1933. [Class 40 (iv)] A pressure - sensitive ribbon microphone, which may be of very small size for suspension from the speaker's lapel, is provided with a coiled or tortuous passageway packed with felt or other damping material, the passageway commencing behind the ribbon and housed within the magnet system. As shown, the microphone comprises a magnet 11 with polepieces 12, diaphragm 10 and a tortuous passage formed by a spiral partition 13. The ribbon 1 is suspended between end plates 15. The Specification as open to inspection under Sect. 91 comprises also a modification, Fig. 4 (Cancelled), in which the tortuous passage is replaced by a flared tube 16<a> extending across the magnet system and terminating in a tube 16 of uniform crosssection. This subjectmatter does not appear in the Specification as accepted.
GB33527/34A 1933-11-21 1934-11-21 Improvements in or relating to microphones Expired GB438090A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US438090XA 1933-11-21 1933-11-21

Publications (1)

Publication Number Publication Date
GB438090A true GB438090A (en) 1935-11-11

Family

ID=21928994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33527/34A Expired GB438090A (en) 1933-11-21 1934-11-21 Improvements in or relating to microphones

Country Status (1)

Country Link
GB (1) GB438090A (en)

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