FR2019237A1 - - Google Patents

Info

Publication number
FR2019237A1
FR2019237A1 FR6933363A FR6933363A FR2019237A1 FR 2019237 A1 FR2019237 A1 FR 2019237A1 FR 6933363 A FR6933363 A FR 6933363A FR 6933363 A FR6933363 A FR 6933363A FR 2019237 A1 FR2019237 A1 FR 2019237A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6933363A
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2019237A1 publication Critical patent/FR2019237A1/fr
Withdrawn legal-status Critical Current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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR6933363A 1968-09-30 1969-09-30 Withdrawn FR2019237A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6813993A NL6813993A (enrdf_load_stackoverflow) 1968-09-30 1968-09-30

Publications (1)

Publication Number Publication Date
FR2019237A1 true FR2019237A1 (enrdf_load_stackoverflow) 1970-06-26

Family

ID=19804799

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6933363A Withdrawn FR2019237A1 (enrdf_load_stackoverflow) 1968-09-30 1969-09-30

Country Status (6)

Country Link
US (1) US3683129A (enrdf_load_stackoverflow)
AT (1) AT294212B (enrdf_load_stackoverflow)
DE (1) DE1948095A1 (enrdf_load_stackoverflow)
FR (1) FR2019237A1 (enrdf_load_stackoverflow)
GB (1) GB1276196A (enrdf_load_stackoverflow)
NL (1) NL6813993A (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721840A (en) * 1971-09-14 1973-03-20 Nittan Co Ltd Sound generator
US4190782A (en) * 1978-07-24 1980-02-26 Telex Communications, Inc. Piezoelectric ceramic resonant transducer with stable frequency
US4384482A (en) 1979-11-27 1983-05-24 Imperial Clevite Inc. Vibrating transducer power supply for use in abnormal tire condition warning systems
US5128235A (en) * 1989-04-21 1992-07-07 E. I. Du Pont De Nemours And Company Method of forming a three-dimensional object comprising additives imparting reduction of shrinkage to photohardenable compositions
US4942066A (en) * 1989-04-21 1990-07-17 E. I. Du Pont De Nemours And Company Solid imaging method using photohardenable materials of self limiting thickness
WO2010007735A1 (ja) * 2008-07-14 2010-01-21 株式会社村田製作所 圧電発電装置
JP5837827B2 (ja) * 2012-01-06 2015-12-24 日本セラミック株式会社 ユニモルフ振動子と超音波送受信器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939106A (en) * 1943-10-06 1960-05-31 Bell Telephone Labor Inc High frequency electromechanical transducer
US2448352A (en) * 1946-03-26 1948-08-31 Sperry Prod Inc Piezoelectric crystal mounting means
US3030606A (en) * 1953-03-19 1962-04-17 Wilbur T Harris Hollow conical electromechanical transducer
US2967956A (en) * 1955-04-19 1961-01-10 Gulton Ind Inc Transducer
GB878087A (en) * 1957-12-09 1961-09-27 Raytheon Co Electroacoustical apparatus
US3007013A (en) * 1959-04-22 1961-10-31 Astatic Corp Microphone construction
US3206558A (en) * 1961-09-22 1965-09-14 Erie Technological Prod Inc Microphone
BE623017A (enrdf_load_stackoverflow) * 1961-09-29
US3305638A (en) * 1964-02-17 1967-02-21 Steven D Teachout Condenser microphone circuit with solid electrolyte battery polarizing source

Also Published As

Publication number Publication date
DE1948095A1 (de) 1970-08-27
AT294212B (de) 1971-11-10
NL6813993A (enrdf_load_stackoverflow) 1970-04-01
GB1276196A (en) 1972-06-01
US3683129A (en) 1972-08-08

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Legal Events

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