FR1185908A - Perfectionnements aux microphones - Google Patents

Perfectionnements aux microphones

Info

Publication number
FR1185908A
FR1185908A FR1185908DA FR1185908A FR 1185908 A FR1185908 A FR 1185908A FR 1185908D A FR1185908D A FR 1185908DA FR 1185908 A FR1185908 A FR 1185908A
Authority
FR
France
Prior art keywords
refinements
microphone
microphone refinements
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
Other languages
English (en)
French (fr)
Inventor
Anthony Crisp Beadle
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR1185908A publication Critical patent/FR1185908A/fr
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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR1185908D 1956-11-09 1957-11-08 Perfectionnements aux microphones Expired FR1185908A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34296/56A GB803284A (en) 1956-11-09 1956-11-09 Improvements in or relating to telephone transmitters

Publications (1)

Publication Number Publication Date
FR1185908A true FR1185908A (fr) 1959-08-10

Family

ID=10363849

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1185908D Expired FR1185908A (fr) 1956-11-09 1957-11-08 Perfectionnements aux microphones

Country Status (5)

Country Link
US (1) US2960579A (cs)
BE (1) BE562223A (cs)
FR (1) FR1185908A (cs)
GB (1) GB803284A (cs)
NL (1) NL222241A (cs)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841035A (en) * 1905-07-28 1907-01-08 Edward Glaze Electrical switch.
US2481368A (en) * 1947-10-04 1949-09-06 Gen Electric Starting switch for fluorescent lamps
GB778726A (en) * 1954-07-05 1957-07-10 Hoover Ltd Improvements relating to electric switches having two "on" and one "off" positions
US2960580A (en) * 1959-04-10 1960-11-15 Ark Les Switch Corp Rotary switch

Also Published As

Publication number Publication date
GB803284A (en) 1958-10-22
BE562223A (cs)
NL222241A (cs)
US2960579A (en) 1960-11-15

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