GB382165A - Improvements in and relating to microphones - Google Patents

Improvements in and relating to microphones

Info

Publication number
GB382165A
GB382165A GB4472/32A GB447232A GB382165A GB 382165 A GB382165 A GB 382165A GB 4472/32 A GB4472/32 A GB 4472/32A GB 447232 A GB447232 A GB 447232A GB 382165 A GB382165 A GB 382165A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
magnetic
sleeve
carbon
magnet
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
GB4472/32A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4472/32A priority Critical patent/GB382165A/en
Priority to DEL80593D priority patent/DE602492C/de
Priority to FR732482D priority patent/FR732482A/fr
Priority to BE386838D priority patent/BE386838A/xx
Publication of GB382165A publication Critical patent/GB382165A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
GB4472/32A 1932-02-15 1932-02-15 Improvements in and relating to microphones Expired GB382165A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4472/32A GB382165A (en) 1932-02-15 1932-02-15 Improvements in and relating to microphones
DEL80593D DE602492C (de) 1932-02-15 1932-02-26 Mikrophon mit Kohlekoernerfuellung
FR732482D FR732482A (fr) 1932-02-15 1932-02-29 Perfectionnements dans les microphones
BE386838D BE386838A (de) 1932-02-15 1932-03-01

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB4472/32A GB382165A (en) 1932-02-15 1932-02-15 Improvements in and relating to microphones
DEL80593D DE602492C (de) 1932-02-15 1932-02-26 Mikrophon mit Kohlekoernerfuellung
FR732482T 1932-02-29
BE386838T 1932-03-01

Publications (1)

Publication Number Publication Date
GB382165A true GB382165A (en) 1932-10-20

Family

ID=9777816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4472/32A Expired GB382165A (en) 1932-02-15 1932-02-15 Improvements in and relating to microphones

Country Status (4)

Country Link
BE (1) BE386838A (de)
DE (1) DE602492C (de)
FR (1) FR732482A (de)
GB (1) GB382165A (de)

Also Published As

Publication number Publication date
BE386838A (de) 1932-04-30
DE602492C (de) 1934-09-13
FR732482A (fr) 1932-09-21

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