GB717222A - Improvements in or relating to transducers having an adjustable electrical impedance - Google Patents

Improvements in or relating to transducers having an adjustable electrical impedance

Info

Publication number
GB717222A
GB717222A GB24211/52A GB2421152A GB717222A GB 717222 A GB717222 A GB 717222A GB 24211/52 A GB24211/52 A GB 24211/52A GB 2421152 A GB2421152 A GB 2421152A GB 717222 A GB717222 A GB 717222A
Authority
GB
United Kingdom
Prior art keywords
impedance
circuit
casing
elements
seen
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
GB24211/52A
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.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation 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 Bendix Aviation Corp filed Critical Bendix Aviation Corp
Publication of GB717222A publication Critical patent/GB717222A/en
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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B06B1/0625—Annular array

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

717,222. Ceramic crystals. BENDIX AVIATION CORPORATION. Sept. 26, 1952 [Oct. 8, 1951], No. 24211/52. Class 40 (4) [Also in Group XL (b)] A sub-aqueous trans ducer comprises a ceramic crystal with a number of pairs o juxtaposed electrode: arranged in a series circuit. A bariun titanate ring 13 is mounted in a sound absorbent mass 15 in side a casing 10 closed by a sound-transparent window 11. The ring abuts against a steel cylinder 14 and the casing is otherwise filled with a liquid 16. The inner and outer electrodes 17, 18 are divided into two parts and connected electrically as seen at 25a in Fig. 4, so that the impedance is four times that of the usual element seen at 25b. In Fig. 4, which is a circuit arrangement suitable for an arrangement of six elements 25b arranged symmetrically round one element 25a, the power dissipated by each element is the same and the impedance of the circuit is <SP>4</SP>/ 7 that of one of the elements 25b.
GB24211/52A 1951-10-08 1952-09-26 Improvements in or relating to transducers having an adjustable electrical impedance Expired GB717222A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US717222XA 1951-10-08 1951-10-08

Publications (1)

Publication Number Publication Date
GB717222A true GB717222A (en) 1954-10-20

Family

ID=22103151

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24211/52A Expired GB717222A (en) 1951-10-08 1952-09-26 Improvements in or relating to transducers having an adjustable electrical impedance

Country Status (3)

Country Link
DE (1) DE1042436B (en)
FR (1) FR1063675A (en)
GB (1) GB717222A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014208256A1 (en) * 2014-04-30 2015-11-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Array of electroacoustic actuators and method for producing an array

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180120A (en) * 1985-09-04 1987-03-18 Graseby Dynamics Ltd Mounting transducers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE377921C (en) * 1920-05-23 1923-07-02 Joseph Engl Dr Electrostatic speakerphone
US2405604A (en) * 1943-03-13 1946-08-13 Bell Telephone Labor Inc Compressional wave translating device
US2420864A (en) * 1943-04-17 1947-05-20 Chilowsky Constantin Piezoelectric plastic material and method of making same
USRE23813E (en) * 1947-12-26 1954-04-20 Piezoelectric transducer and method for producing same
NL86929C (en) * 1948-06-12

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014208256A1 (en) * 2014-04-30 2015-11-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Array of electroacoustic actuators and method for producing an array
DE102014208256B4 (en) * 2014-04-30 2016-03-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Array of electroacoustic actuators and method for producing an array
US10425735B2 (en) 2014-04-30 2019-09-24 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Array of electroacoustic actuators and method for producing an array

Also Published As

Publication number Publication date
FR1063675A (en) 1954-05-05
DE1042436B (en) 1958-10-30

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