GB2012106A - Electro-mechanical transducers - Google Patents

Electro-mechanical transducers

Info

Publication number
GB2012106A
GB2012106A GB7846885A GB7846885A GB2012106A GB 2012106 A GB2012106 A GB 2012106A GB 7846885 A GB7846885 A GB 7846885A GB 7846885 A GB7846885 A GB 7846885A GB 2012106 A GB2012106 A GB 2012106A
Authority
GB
United Kingdom
Prior art keywords
dielectric plate
electro
electrodes
bonded
major surfaces
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
GB7846885A
Other versions
GB2012106B (en
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.)
Sony Corp
Original Assignee
Sony 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
Priority claimed from JP52146467A external-priority patent/JPS5936439B2/en
Priority claimed from JP52146468A external-priority patent/JPS5936440B2/en
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB2012106A publication Critical patent/GB2012106A/en
Application granted granted Critical
Publication of GB2012106B publication Critical patent/GB2012106B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
    • H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
    • H10N30/2041—Beam type
    • H10N30/2042—Cantilevers, i.e. having one fixed end

Landscapes

  • Compositions Of Oxide Ceramics (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

An electro-mechanical transducer 10 has a dielectric plate 11 which is coated on opposite major surfaces with electrodes 12a and 12b, and a base plate 13 which is bonded to one of the major surfaces of the dielectric plate 11 through the electrode 12b and does not follow the shrinkage and expansion of the dielectric plate 11 when a voltage is applied to the dielectric plate 11 through the electrodes 12a and 12b perpendicular thereto. The dielectric plate 11 is made of a ceramic which is in para-electric phase or anti-ferroelectric phase at room temperature to avoid residual strain and displacement due to domain structure. Two ceramic plates 11 may be bonded with a phosphor bronze base plate 13 therebetween to form a bi-morph. Such transducer can be used to support a magnetic head in a video tape recorder. <IMAGE>
GB7846885A 1977-12-06 1978-12-01 Electro-mechanical transducers Expired GB2012106B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP52146467A JPS5936439B2 (en) 1977-12-06 1977-12-06 Electrical/mechanical conversion element
JP52146468A JPS5936440B2 (en) 1977-12-06 1977-12-06 Electrical/mechanical conversion element

Publications (2)

Publication Number Publication Date
GB2012106A true GB2012106A (en) 1979-07-18
GB2012106B GB2012106B (en) 1982-06-23

Family

ID=26477299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7846885A Expired GB2012106B (en) 1977-12-06 1978-12-01 Electro-mechanical transducers

Country Status (5)

Country Link
CA (1) CA1125343A (en)
DE (1) DE2852795A1 (en)
FR (1) FR2411533A1 (en)
GB (1) GB2012106B (en)
NL (1) NL185640C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0837551A2 (en) * 1996-10-17 1998-04-22 C.R.F. Società Consortile per Azioni Electrostatic linear motor
US8847466B2 (en) 2008-06-19 2014-09-30 Nxp B.V. Piezoelectric bimorph switch

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3135494A1 (en) * 1981-09-08 1983-03-24 Robert Bosch Gmbh, 7000 Stuttgart "FUEL INJECTION SYSTEM"
DE3240884A1 (en) * 1982-11-05 1984-05-10 Philips Patentverwaltung Gmbh, 2000 Hamburg CERAMIC BISTABLE BENDING ELEMENT
US4625137A (en) * 1983-12-09 1986-11-25 Nippon Telegraph & Telephone Public Corp. Piezoelectric actuator using bimorph element
USRE33691E (en) * 1984-12-21 1991-09-17 General Electric Company Piezoelectric ceramic switching devices and systems and method of making the same
DE3532660A1 (en) * 1985-09-13 1987-03-26 Atlas Fahrzeugtechnik Gmbh FUEL INJECTION VALVE
US4755706A (en) * 1986-06-19 1988-07-05 General Electric Company Piezoelectric relays in sealed enclosures
JPH02240977A (en) * 1989-03-14 1990-09-25 Toshiba Corp Displacement generating device
JP2538754B2 (en) * 1993-09-21 1996-10-02 山一電機株式会社 Torsion oscillator
DE10017760C1 (en) * 2000-04-10 2001-08-16 Festo Ag & Co Piezoceramic bending transducer has base on which piezoceramic layers with electrodes between them are mounted, compensating layer made from material with same coefficient of thermal expansion being mounted on opposite side of carrier
DE10149840A1 (en) * 2001-10-10 2003-05-08 Festo Ag & Co Piezoceramic bending transducer and use of the piezoceramic bending transducer
RU2513030C2 (en) * 2012-04-10 2014-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВПО "НИУ "МЭИ") Reversivble rotation electrostatic micromotor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756353A (en) * 1950-04-10 1956-07-24 Gen Electric Bender-mode piezoelectric device and method of making the same
GB1145371A (en) * 1965-02-24 1969-03-12 Clevite Corp Field responsive devices and materials
US4106065A (en) * 1976-03-19 1978-08-08 Ampex Corporation Drive circuitry for controlling movable video head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0837551A2 (en) * 1996-10-17 1998-04-22 C.R.F. Società Consortile per Azioni Electrostatic linear motor
EP0837551A3 (en) * 1996-10-17 1998-10-28 C.R.F. Società Consortile per Azioni Electrostatic linear motor
US8847466B2 (en) 2008-06-19 2014-09-30 Nxp B.V. Piezoelectric bimorph switch

Also Published As

Publication number Publication date
FR2411533A1 (en) 1979-07-06
NL7811863A (en) 1979-06-08
NL185640C (en) 1990-06-01
CA1125343A (en) 1982-06-08
GB2012106B (en) 1982-06-23
FR2411533B1 (en) 1984-07-06
DE2852795C2 (en) 1989-06-22
DE2852795A1 (en) 1979-06-07
NL185640B (en) 1990-01-02

Similar Documents

Publication Publication Date Title
GB2012106A (en) Electro-mechanical transducers
US2625663A (en) Transducer
DE3378004D1 (en) Integrated magnetostrictive-piezoelectric metal oxide semiconductor magnetic playback head
CA2069708A1 (en) Probe-driving mechanism, production thereof, and apparatus and piezoelectric actuator employing the same
GB681671A (en) Improvements in and relating to electro-mechanical translating devices
US3809828A (en) Electret transducing device
GB1227623A (en)
JPS574130B2 (en)
IT1118701B (en) DEVICE FOR THE APPLICATION OF A CONTROL VOLTAGE TO A PIEZOELECTRIC POSITIONER ELEMENT PARTICULARLY FOR THE PURPOSE OF POSITIONING A RECORDING OR REPRODUCTION ELEMENT COMPARED TO AN INFORMATION TRACK
GB787444A (en) Improvements in or relating to ferroelectric signal recording and reproducing systems and record members therefor
JP3470920B2 (en) converter
JPS6125228B2 (en)
GB725833A (en) Piezo electric transducers
NL103781C (en)
JPS57158012A (en) Automatic tracking device
JPS5892745U (en) semiconductor pressure transducer
JPS55122230A (en) Rotary head type magnetic picture recording and reproducing device
JPS5545232A (en) Piezo-electric vibrator
FR2287134A1 (en) Piezo-transmission element - contg. inlaid electrodes to reduce read-in voltage
JPS5727424A (en) Contact pressure controller for magnetic head of head drum device
JPS608869U (en) Water contact detection device
JPS5532271A (en) Electro-mechanical converting element unit
JPS53118030A (en) Opposed electrode for electrostatic recorder
JPS62204584A (en) Polarization for piezoelectric body
JPS57158011A (en) Video signal recording and reproducing device

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19981130