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GB528523A - Improvements in or relating to telephone transmitters - Google Patents

Improvements in or relating to telephone transmitters

Info

Publication number
GB528523A
GB528523A GB13102/39A GB1310239A GB528523A GB 528523 A GB528523 A GB 528523A GB 13102/39 A GB13102/39 A GB 13102/39A GB 1310239 A GB1310239 A GB 1310239A GB 528523 A GB528523 A GB 528523A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone transmitters
telephone
allloys
permalloy
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
GB13102/39A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB528523A publication Critical patent/GB528523A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

528,523. Allloys. STANDARD TELEPHONES. & CABLES, Ltd. May 2, 1939, No. 13102. Convention date, Sept. 24, 1938. Drawings to Specification. [Class 82 (i)] [Also in Group XXXIX] The ribbon diaphragm of a telephone transmitter is made of permalloy (iron plus about 30 per cent. of nickel) to which molybdenum may be added in small quantities.
GB13102/39A 1938-09-24 1939-05-02 Improvements in or relating to telephone transmitters Expired GB528523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US231487A US2226934A (en) 1938-09-24 1938-09-24 Acoustic device

Publications (1)

Publication Number Publication Date
GB528523A true GB528523A (en) 1940-10-31

Family

ID=22869425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13102/39A Expired GB528523A (en) 1938-09-24 1939-05-02 Improvements in or relating to telephone transmitters

Country Status (2)

Country Link
US (1) US2226934A (en)
GB (1) GB528523A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545714A1 (en) * 1985-12-13 1987-06-19 Bayer Ag Apparatus and process for the treatment of wound sheet-like structures, especially of textile webs
JP5253795B2 (en) * 2007-11-29 2013-07-31 株式会社オーディオテクニカ Ribbon microphone and ribbon microphone unit
JP5545833B2 (en) * 2010-04-27 2014-07-09 株式会社オーディオテクニカ Ribbon microphone unit and ribbon microphone
WO2015077099A1 (en) * 2013-11-21 2015-05-28 Ghaffari Mohsen Tunable ribbon microphone

Also Published As

Publication number Publication date
US2226934A (en) 1940-12-31

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