FR2054558B1 - - Google Patents

Info

Publication number
FR2054558B1
FR2054558B1 FR7018965A FR7018965A FR2054558B1 FR 2054558 B1 FR2054558 B1 FR 2054558B1 FR 7018965 A FR7018965 A FR 7018965A FR 7018965 A FR7018965 A FR 7018965A FR 2054558 B1 FR2054558 B1 FR 2054558B1
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.)
Expired
Application number
FR7018965A
Other versions
FR2054558A1 (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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP4666569U external-priority patent/JPS496952Y1/ja
Priority claimed from JP4911269U external-priority patent/JPS4736109Y1/ja
Priority claimed from JP6236869U external-priority patent/JPS4741469Y1/ja
Priority claimed from JP6237069U external-priority patent/JPS5215214Y1/ja
Priority claimed from JP9664069U external-priority patent/JPS4938414Y1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2054558A1 publication Critical patent/FR2054558A1/fr
Application granted granted Critical
Publication of FR2054558B1 publication Critical patent/FR2054558B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
    • G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR7018965A 1969-05-22 1970-05-25 Expired FR2054558B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP4666569U JPS496952Y1 (fr) 1969-05-22 1969-05-22
JP4122469 1969-05-26
JP4911269U JPS4736109Y1 (fr) 1969-05-26 1969-05-26
JP6236869U JPS4741469Y1 (fr) 1969-06-27 1969-06-27
JP6237069U JPS5215214Y1 (fr) 1969-06-27 1969-06-27
JP9664069U JPS4938414Y1 (fr) 1969-10-09 1969-10-09

Publications (2)

Publication Number Publication Date
FR2054558A1 FR2054558A1 (fr) 1971-04-23
FR2054558B1 true FR2054558B1 (fr) 1975-09-26

Family

ID=27550025

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7018965A Expired FR2054558B1 (fr) 1969-05-22 1970-05-25

Country Status (4)

Country Link
US (1) US3749854A (fr)
FR (1) FR2054558B1 (fr)
GB (1) GB1316811A (fr)
NL (1) NL155162B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172253A (en) * 1972-04-19 1979-10-23 Hermans Albert L Controlled wave pattern ultrasonic burglar alarm
US4006371A (en) * 1973-03-19 1977-02-01 Whitewater Electronics, Inc. Electroacoustical transducer comprising piezoelectric element
JPS5642499A (en) * 1979-05-15 1981-04-20 Nippon Ceramic Kk Ultrasonic-wave transducer
JPS5667731A (en) * 1979-11-06 1981-06-08 Nissan Motor Co Ltd Knocking sensor
JPS6025956B2 (ja) * 1980-12-10 1985-06-21 松下電器産業株式会社 超音波送受波器
JPS5851697A (ja) * 1981-09-22 1983-03-26 Matsushita Electric Ind Co Ltd 超音波送受波器
US4607186A (en) * 1981-11-17 1986-08-19 Matsushita Electric Industrial Co. Ltd. Ultrasonic transducer with a piezoelectric element
FR2536622B1 (fr) * 1982-11-19 1986-03-07 Thomson Csf Hydrophone de vitesse
US5185728A (en) * 1990-10-31 1993-02-09 Cyber Scientific Omnidirectional ultrasonic transducer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1376306A (fr) * 1963-02-07 1964-10-23 Brown Ltd S G Perfectionnements aux transducteurs électro-acoustiques
US3360664A (en) * 1964-10-30 1967-12-26 Gen Dynamics Corp Electromechanical apparatus

Also Published As

Publication number Publication date
US3749854A (en) 1973-07-31
DE2025084B2 (de) 1972-06-15
NL7007549A (fr) 1970-11-30
NL155162B (nl) 1977-11-15
FR2054558A1 (fr) 1971-04-23
GB1316811A (en) 1973-05-16
DE2025084A1 (de) 1971-01-14

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