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GB2181621A - Electro-mechanical transducer - Google Patents

Electro-mechanical transducer

Info

Publication number
GB2181621A
GB2181621A GB08622675A GB8622675A GB2181621A GB 2181621 A GB2181621 A GB 2181621A GB 08622675 A GB08622675 A GB 08622675A GB 8622675 A GB8622675 A GB 8622675A GB 2181621 A GB2181621 A GB 2181621A
Authority
GB
United Kingdom
Prior art keywords
pin
electro
layers
conductive coatings
coatings
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.)
Granted
Application number
GB08622675A
Other versions
GB8622675D0 (en
GB2181621B (en
Inventor
Thomas Griffith Jones
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8622675D0 publication Critical patent/GB8622675D0/en
Publication of GB2181621A publication Critical patent/GB2181621A/en
Application granted granted Critical
Publication of GB2181621B publication Critical patent/GB2181621B/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
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

An electro-mechanical transducer has two layers (20) of a polarised piezoelectric polymer coated on each face with a conductive coating (22). The two layers are arranged back to back and secured by a double-sided adhesive tape (24) with their positively charged conductive coatings facing each other. As the protective layers (26) of insulation and a protective sheath (28) are provided. The inner conductive coatings are interconnected by a pin (30) passing through the polymer layers with the outer conductive coating being omitted in the vicinity of the pin. The outer conductive coatings are likewise interconnected by a pin (32), connection to an external screened cable being made through these pins with pin (32) being connected to the outer screen of the cable and pin (30) to the inner signal wire. Because the device is piezo-electric no external power supply is required and interconnection of the two inner conductive coatings enhances the signal generated by the device while the two outer coatings act as an electro-magnetic and electro-static screen to reduce extraneous and unwanted spurious signals which would otherwise affect operation of the device.
GB8622675A 1985-01-21 1986-01-21 Electro-mechanical transducer Expired GB2181621B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858501475A GB8501475D0 (en) 1985-01-21 1985-01-21 Electro-mechanical transducer

Publications (3)

Publication Number Publication Date
GB8622675D0 GB8622675D0 (en) 1986-10-22
GB2181621A true GB2181621A (en) 1987-04-23
GB2181621B GB2181621B (en) 1989-07-19

Family

ID=10573163

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858501475A Pending GB8501475D0 (en) 1985-01-21 1985-01-21 Electro-mechanical transducer
GB8622675A Expired GB2181621B (en) 1985-01-21 1986-01-21 Electro-mechanical transducer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858501475A Pending GB8501475D0 (en) 1985-01-21 1985-01-21 Electro-mechanical transducer

Country Status (4)

Country Link
EP (1) EP0210214A1 (en)
AU (1) AU5354886A (en)
GB (2) GB8501475D0 (en)
WO (1) WO1986004477A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9108490D0 (en) * 1991-04-20 1991-06-05 Jones Richard W Device for acoustic wave generation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH587595A5 (en) * 1974-05-30 1977-05-13 Plessey Handel Investment Ag
US4166229A (en) * 1978-02-23 1979-08-28 The United States Of America As Represented By The Secretary Of The Navy Piezoelectric polymer membrane stress gage
DE2944506A1 (en) * 1978-11-05 1980-05-08 Ngk Spark Plug Co PIEZOELECTRIC CONVERTER FOR ELECTRIC STRING INSTRUMENTS AND CARTRIDGES CONTAINING THEM
JPS58156299A (en) * 1982-03-12 1983-09-17 Toshiba Corp Multi-layer polymer transducer
US4475014A (en) * 1982-09-13 1984-10-02 Harman-Motive Inc. Acoustical transducer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH587595A5 (en) * 1974-05-30 1977-05-13 Plessey Handel Investment Ag
US4166229A (en) * 1978-02-23 1979-08-28 The United States Of America As Represented By The Secretary Of The Navy Piezoelectric polymer membrane stress gage
DE2944506A1 (en) * 1978-11-05 1980-05-08 Ngk Spark Plug Co PIEZOELECTRIC CONVERTER FOR ELECTRIC STRING INSTRUMENTS AND CARTRIDGES CONTAINING THEM
JPS58156299A (en) * 1982-03-12 1983-09-17 Toshiba Corp Multi-layer polymer transducer
US4475014A (en) * 1982-09-13 1984-10-02 Harman-Motive Inc. Acoustical transducer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Volume 7, No. 276 (E-215) (1421), 9 December 1983 & JP,A,58 156299 (Tokyo Shibaura Denki K.K.) 17 September 1983 … *

Also Published As

Publication number Publication date
GB8622675D0 (en) 1986-10-22
WO1986004477A1 (en) 1986-07-31
GB8501475D0 (en) 1985-02-20
EP0210214A1 (en) 1987-02-04
GB2181621B (en) 1989-07-19
AU5354886A (en) 1986-08-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000121