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)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Telephone Set Structure (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 (US06265458-20010724-C00056.png) 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 (US06265458-20010724-C00056.png)
DE (1) DE602492C (US06265458-20010724-C00056.png)
FR (1) FR732482A (US06265458-20010724-C00056.png)
GB (1) GB382165A (US06265458-20010724-C00056.png)

Also Published As

Publication number Publication date
BE386838A (US06265458-20010724-C00056.png) 1932-04-30
FR732482A (fr) 1932-09-21
DE602492C (de) 1934-09-13

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