BE427273A - - Google Patents

Info

Publication number
BE427273A
BE427273A BE427273DA BE427273A BE 427273 A BE427273 A BE 427273A BE 427273D A BE427273D A BE 427273DA BE 427273 A BE427273 A BE 427273A
Authority
BE
Belgium
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE427273A publication Critical patent/BE427273A/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)
  • Diaphragms And Bellows (AREA)
BE427273D 1937-03-31 1938-03-31 BE427273A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US134044A US2191992A (en) 1937-03-31 1937-03-31 Telephone transmitter

Publications (1)

Publication Number Publication Date
BE427273A true BE427273A (enrdf_load_stackoverflow) 1938-04-30

Family

ID=22461499

Family Applications (1)

Application Number Title Priority Date Filing Date
BE427273D BE427273A (enrdf_load_stackoverflow) 1937-03-31 1938-03-31

Country Status (4)

Country Link
US (1) US2191992A (enrdf_load_stackoverflow)
BE (1) BE427273A (enrdf_load_stackoverflow)
FR (1) FR835932A (enrdf_load_stackoverflow)
NL (1) NL57470C (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE482597A (enrdf_load_stackoverflow) * 1944-08-15
US2481771A (en) * 1945-08-25 1949-09-13 Bendix Aviat Corp Carbon pile regulator
US2482972A (en) * 1945-09-10 1949-09-27 Bendix Aviat Corp Electron tube type phonograph reproducer
US2481782A (en) * 1945-09-26 1949-09-13 Bendix Aviat Corp Carbon pile regulator
US2481752A (en) * 1946-05-15 1949-09-13 Bendix Aviat Corp Electric regulator with diaphragm type spring
NL70196C (enrdf_load_stackoverflow) * 1947-10-31
US2532741A (en) * 1947-10-31 1950-12-05 Bell Telephone Labor Inc Microphone with opposite electrodes being of varying and constant curvature
US2562526A (en) * 1949-12-01 1951-07-31 Stromberg Carlson Co Telephone transmitter
DE976947C (de) * 1952-06-25 1964-09-17 Standard Elek K Lorenz Ag Federnde Einspannung der Membran einer Sprech- oder Hoerkapsel
US3020346A (en) * 1957-12-09 1962-02-06 Lionel Corp Microphone for sound dispatching station

Also Published As

Publication number Publication date
NL57470C (enrdf_load_stackoverflow) 1946-05-15
US2191992A (en) 1940-02-27
FR835932A (fr) 1939-01-05

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