NL70196C - - Google Patents

Info

Publication number
NL70196C
NL70196C NL70196DA NL70196C NL 70196 C NL70196 C NL 70196C NL 70196D A NL70196D A NL 70196DA NL 70196 C NL70196 C NL 70196C
Authority
NL
Netherlands
Application number
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.)
Publication of NL70196C publication Critical patent/NL70196C/xx

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)
  • Lasers (AREA)
  • Telephone Set Structure (AREA)
NL70196D 1947-10-31 NL70196C (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US783324A US2532694A (en) 1947-10-31 1947-10-31 Telephone transmitter having frustoconical back electrode

Publications (1)

Publication Number Publication Date
NL70196C true NL70196C (zh)

Family

ID=25128879

Family Applications (1)

Application Number Title Priority Date Filing Date
NL70196D NL70196C (zh) 1947-10-31

Country Status (3)

Country Link
US (1) US2532694A (zh)
GB (1) GB651378A (zh)
NL (1) NL70196C (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607859A (en) * 1950-12-01 1952-08-19 Bell Telephone Labor Inc Telephone transmitter
DE1061825B (de) * 1954-02-26 1959-07-23 Hans Widmaier Kohlegriessmikrophon-Sprechkapsel
NL275488A (zh) * 1961-03-02

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE402491A (zh) * 1933-05-11
US2191992A (en) * 1937-03-31 1940-02-27 Int Standard Electric Corp Telephone transmitter
US2225488A (en) * 1938-06-18 1940-12-17 Bell Telephone Labor Inc Impulse translating apparatus
US2404772A (en) * 1942-12-21 1946-07-30 Kellogg Switchboard & Supply Telephone transmitter
BE468390A (zh) * 1943-12-28

Also Published As

Publication number Publication date
US2532694A (en) 1950-12-05
GB651378A (en) 1951-03-14

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