ES476411A1 - Un transductor piezoelectrico - Google Patents

Un transductor piezoelectrico

Info

Publication number
ES476411A1
ES476411A1 ES476411A ES476411A ES476411A1 ES 476411 A1 ES476411 A1 ES 476411A1 ES 476411 A ES476411 A ES 476411A ES 476411 A ES476411 A ES 476411A ES 476411 A1 ES476411 A1 ES 476411A1
Authority
ES
Spain
Prior art keywords
piezo
track
electric
transducer
drive voltage
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
ES476411A
Other languages
English (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
Application filed by Sony Corp filed Critical Sony Corp
Publication of ES476411A1 publication Critical patent/ES476411A1/es
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
    • 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
    • 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
    • G11B5/592—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 using bimorph elements supporting the 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
    • 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
    • H10N30/80—Constructional details
    • H10N30/802—Drive or control circuitry or methods for piezoelectric or electrostrictive devices not otherwise provided for
    • 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
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Abstract

Un transductor piezoléctrico, u hoja dimorfa, del tipo que tiene una pareja de elementos piezoeléctricos dotados de polaridad eléctrica interpuestos entre unos electrodos interiores y exteriores, estando los elementos unidos entre sí por sus respectivos electrodos interiores tiene sus elementos de polaridades opuestas, y está provisto de un circuito de excitación (Sf) conectada a los electrodos exteriores de los elementos piezoeléctricos, respectivamente, para producir la desviación o deflexión del transductor, y una malla de circuito para fijar, a un valor máximo Vz relativamente pequeño, la tensión en los electrodos interiores unidos entre sí, por lo menos en respuesta a una polaridad de la tensión de excitación de sentido puesto al de la polaridad de uno de los elementos piezoeléctricos, para así evitar una sustancial despolarización de por lo menos ese elemento primeramente citado. De preferencia, en el circuito excitador indicado conforme a esta invención, el electrodo exterior indicado conforme a este invención, el electrodo exterior de uno de los elementos piezoeléctricos está conectada a masa , y la fuente de suministrado de la tensión de excitación está conectada entre el electrodo exterior del otro elemento piezoeléctrico y la masa. En el caso en que la tensión de excitación sea una tensión de corriente alterna, por ejemplo, para efectuar una oscilación de pequeña amplitud ("dither o "tremor") del transductor u hoja dimofra, la malla de circuito del circuito de excitación tiene también por efecto el de fijar, al relativamente pequeño valor máximo (Vz) , la tensión presente en los electrodos interiores unidos entre si, en respuesta a la polaridad de la tensión de excitación de sentido opuesto al de la polaridad del otro de los elementos piezoeléctricos , para así evitar la sustancial despolarización de ese otro elemento. En una forma convenientemente de realización del invento, la malla de circuito para fijar la tensión puede estar en forma de un divisor de tensión que incluya unos medios unidireccionales, tales como unos diodos, conectados a los respectivos elementos piezoeléctricos, y polarizados cada uno de modo que permita el paso de corriente por el diodo en sentido opuesto al de la polaridad del elemento piezoélectrico respectivos, y unos limitadores de tensión constituidos, por ejemplo, por unos diodos de Zener, y que estén cada uno conectado en serie con el respectivo elemento unidireccional o diodo de modo que la tensión fijada sea la tensión de Zener (Vz).
ES476411A 1977-12-29 1978-12-28 Un transductor piezoelectrico Expired ES476411A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15818777A JPS5492307A (en) 1977-12-29 1977-12-29 Driving circuit of electrostrictive converter

Publications (1)

Publication Number Publication Date
ES476411A1 true ES476411A1 (es) 1979-11-16

Family

ID=15666162

Family Applications (1)

Application Number Title Priority Date Filing Date
ES476411A Expired ES476411A1 (es) 1977-12-29 1978-12-28 Un transductor piezoelectrico

Country Status (16)

Country Link
US (1) US4237399A (es)
JP (1) JPS5492307A (es)
AT (1) AT374940B (es)
AU (1) AU523309B2 (es)
BR (1) BR7808536A (es)
CA (1) CA1132707A (es)
CH (1) CH626764A5 (es)
DE (1) DE2856508A1 (es)
DK (1) DK153608C (es)
ES (1) ES476411A1 (es)
FR (1) FR2413840B1 (es)
GB (1) GB2011734B (es)
IT (1) IT1101699B (es)
NL (1) NL191375C (es)
SE (1) SE438222B (es)
SU (1) SU1367845A3 (es)

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855963A (en) * 1972-11-08 1989-08-08 Exxon Production Research Company Shear wave logging using acoustic multipole devices
CA1147456A (en) * 1978-03-23 1983-05-31 Raymond F. Ravizza Automatically compensated movable head servo circuit and method
JPS6235145Y2 (es) * 1979-10-08 1987-09-07
CA1192646A (en) * 1980-02-04 1985-08-27 Herzl Laor Piezoelectric apparatus for positioning optical fibers
JPS57140083A (en) * 1981-02-24 1982-08-30 Sony Corp Video signal reproducing device
JPS57135583A (en) * 1981-02-14 1982-08-21 Sony Corp Video signal reproducing device
US4362407A (en) * 1981-09-08 1982-12-07 Piezo Electric Products, Inc. Piezoelectric printer and piezoelectric multilam actuator used therein
US4932003A (en) * 1982-05-19 1990-06-05 Exxon Production Research Company Acoustic quadrupole shear wave logging device
JPS5919383A (ja) * 1982-07-23 1984-01-31 Omron Tateisi Electronics Co 圧電バイモルフ
US4475014A (en) * 1982-09-13 1984-10-02 Harman-Motive Inc. Acoustical transducer
JPS5961555U (ja) * 1982-10-14 1984-04-23 オムロン株式会社 圧電バイモルフの駆動回路
JPS5994103A (ja) * 1982-11-19 1984-05-30 Nec Corp 電気機械変換器の制御装置
AT380934B (de) * 1983-01-13 1986-07-25 Enfo Grundlagen Forschungs Ag Elektrisch-pneumatischer signalwandler
JPS59143654A (ja) * 1983-02-05 1984-08-17 Konishiroku Photo Ind Co Ltd 液体放出装置
US4625137A (en) * 1983-12-09 1986-11-25 Nippon Telegraph & Telephone Public Corp. Piezoelectric actuator using bimorph element
JPS60237869A (ja) * 1984-05-11 1985-11-26 Nippon Soken Inc 圧電素子駆動装置
US4553061A (en) * 1984-06-11 1985-11-12 General Electric Company Piezoelectric bimorph driven direct current latching relay
JPS6116429A (ja) * 1984-06-29 1986-01-24 オムロン株式会社 ２層貼り電歪素子の駆動回路
JPS6177221A (ja) * 1984-09-20 1986-04-19 オムロン株式会社 リレ−
USRE33691E (en) * 1984-12-21 1991-09-17 General Electric Company Piezoelectric ceramic switching devices and systems and method of making the same
JPS61285082A (ja) * 1985-06-10 1986-12-15 Toshiba Corp 圧電型駆動装置
US4914673A (en) * 1985-10-07 1990-04-03 Minolta Camera Kabushiki Kaisha Radiation thermometer
EP0632439B1 (en) * 1987-05-22 1998-08-12 Fuji Photo Film Co., Ltd. Method of and system for driving magnetic tape
WO1989007345A1 (en) * 1988-02-08 1989-08-10 Pacific Bell Improved piezoelectric relay element and method for driving the same
DE3843109C1 (es) * 1988-12-21 1990-06-13 Gruenbeck Wasseraufbereitung Gmbh, 8884 Hoechstaedt, De
DE3843110C1 (es) * 1988-12-21 1990-02-22 Gruenbeck Wasseraufbereitung Gmbh, 8884 Hoechstaedt, De
JP2536114B2 (ja) * 1989-01-18 1996-09-18 トヨタ自動車株式会社 圧電素子の駆動装置
DE3935474A1 (de) * 1989-06-22 1991-01-03 Hoechst Ceram Tec Ag Piezoelektrischer biegewandler und seine verwendung
JP3185226B2 (ja) * 1991-01-30 2001-07-09 株式会社村田製作所 圧電バイモルフ素子の駆動方法及び圧電バイモルフ素子
US5241233A (en) * 1992-03-16 1993-08-31 Rockwell International Corporation Electric drive for a rectifying segmented transducer
DE4216050C2 (de) * 1992-05-15 1995-05-24 Daimler Benz Ag Ultraschallwanderwellenmotor mit formschlüssiger Anregung von Wanderwellen
JPH0744841A (ja) * 1993-07-26 1995-02-14 Sharp Corp 回転ヘッド型磁気記録再生装置
DE69416054T2 (de) * 1993-08-13 1999-08-05 Sharp Kk Aufnahme/Wiedergabegerät und Verfahren zur Kopfhöheeinstellung in einem solchen Gerät
DE19514308A1 (de) * 1995-04-18 1996-10-24 Siemens Ag Ultraschallwandlerkopf mit integrierten steuerbaren Verstärkereinrichtungen
US5825117A (en) * 1996-03-26 1998-10-20 Hewlett-Packard Company Second harmonic imaging transducers
US6362542B1 (en) * 1997-08-15 2002-03-26 Seagate Technology Llc Piezoelectric microactuator for precise head positioning
DE19935768C2 (de) * 1999-07-23 2003-10-09 Auergesellschaft Gmbh Piezoelektrischer akustischer Alarmgeber
US6653762B2 (en) * 2000-04-19 2003-11-25 Murata Manufacturing Co., Ltd. Piezoelectric type electric acoustic converter
DE10023556A1 (de) 2000-05-15 2001-11-29 Festo Ag & Co Piezo-Biegewandler sowie Verwendung desselben
JP2004055410A (ja) * 2002-07-22 2004-02-19 Advantest Corp バイモルフスイッチ、バイモルフスイッチ製造方法、電子回路、及び電子回路製造方法
US7656071B2 (en) * 2002-10-21 2010-02-02 Hrl Laboratories, Llc Piezoelectric actuator for tunable electronic components
US7098577B2 (en) * 2002-10-21 2006-08-29 Hrl Laboratories, Llc Piezoelectric switch for tunable electronic components
US7085121B2 (en) 2002-10-21 2006-08-01 Hrl Laboratories, Llc Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters
US7141911B2 (en) * 2002-11-15 2006-11-28 Matsushita Electric Industrial Co., Ltd. Driving method of piezoelectric actuator, piezoelectric actuator, and disk recording and reproducing apparatus using the same
US6895645B2 (en) * 2003-02-25 2005-05-24 Palo Alto Research Center Incorporated Methods to make bimorph MEMS devices
US7089635B2 (en) * 2003-02-25 2006-08-15 Palo Alto Research Center, Incorporated Methods to make piezoelectric ceramic thick film arrays and elements
US6964201B2 (en) * 2003-02-25 2005-11-15 Palo Alto Research Center Incorporated Large dimension, flexible piezoelectric ceramic tapes
US7446458B2 (en) * 2003-09-04 2008-11-04 Nec Corporation Piezoelectric ceramic element and portable device
DE10346693A1 (de) * 2003-10-08 2005-05-04 Conti Temic Microelectronic Steuerschaltung und Steuerverfahren für ein Piezoventil
US7176600B2 (en) * 2003-12-18 2007-02-13 Palo Alto Research Center Incorporated Poling system for piezoelectric diaphragm structures
US6958817B1 (en) * 2004-08-13 2005-10-25 Nanyang Technological University Method of interferometry with modulated optical path-length difference and interferometer
US7394181B2 (en) * 2005-03-04 2008-07-01 United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Hybrid eletromechanical actuator and actuation system
JP5047771B2 (ja) * 2006-12-25 2012-10-10 株式会社リコー 転写装置および転写装置の製造方法、その転写装置を用いた画像形成装置
JP5123532B2 (ja) * 2007-01-30 2013-01-23 太陽誘電株式会社 マイクロカンチレバー
JP4543088B2 (ja) * 2008-01-09 2010-09-15 シャープ株式会社 帯電装置および画像形成装置
JP4543090B2 (ja) * 2008-01-18 2010-09-15 シャープ株式会社 帯電装置および画像形成装置
FR2929450B1 (fr) * 2008-03-28 2010-08-20 Seb Sa Appareil electromenager comportant une pompe piezo-electrique munie d'un circuit d'alimentation electrique simplifie
DE102008028885A1 (de) * 2008-06-18 2009-12-31 Epcos Ag Verfahren zur Abstimmung einer Resonanzfrequenz eines piezoelektrischen Bauelementes
US8847466B2 (en) * 2008-06-19 2014-09-30 Nxp B.V. Piezoelectric bimorph switch
DE102008030248A1 (de) * 2008-06-25 2009-12-31 Conti Temic Microelectronic Gmbh Ansteuerschaltung sowie Verfahren zur Ansteuerung von Piezoeinheit, insbesondere trimorphem Piezoaktor
US7969069B2 (en) * 2009-01-13 2011-06-28 Dove Research Llc Energy transducer and method
JP4820425B2 (ja) * 2009-03-16 2011-11-24 Ｔｄｋ株式会社 ヘッドジンバルアセンブリの製造方法、及び、ハードディスク装置の製造方法
US20110050036A1 (en) * 2009-09-03 2011-03-03 Gilardi Stephen S Bias Circuit for Electric Field Transducers
JP5676216B2 (ja) * 2010-11-11 2015-02-25 日本碍子株式会社 圧電素子の製造方法
JP5743532B2 (ja) * 2010-12-24 2015-07-01 キヤノン株式会社 圧電デバイスの駆動方法
US20120235958A1 (en) * 2011-03-17 2012-09-20 Innovision Flextech Corporation Chip card display system
US8854923B1 (en) * 2011-09-23 2014-10-07 The United States Of America As Represented By The Secretary Of The Navy Variable resonance acoustic transducer
US10241223B2 (en) * 2015-11-19 2019-03-26 Halliburton Energy Services, Inc. Downhole piezoelectric acoustic transducer
CN112041091B (zh) * 2018-04-30 2022-03-18 维蒙股份公司 超声换能器

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115588A (en) * 1958-02-05 1963-12-24 Raytheon Co Electroacoustical apparatus
US3054084A (en) * 1959-09-28 1962-09-11 Edwin J Parssinen Balanced flexural electroacoustic transducer
US3592967A (en) * 1968-05-20 1971-07-13 George A Harris Ultrasonic detector
DE2109063C3 (de) * 1971-02-25 1979-07-19 Braun Ag Piezoelektrischer Antrieb
US3794410A (en) * 1973-02-20 1974-02-26 Mca Disco Vision Articulated mirror
US3940974A (en) * 1974-05-06 1976-03-02 Minnesota Mining And Manufacturing Company Electrically compensated sensor
IT1016752B (it) * 1974-08-01 1977-06-20 Fiat Spa Circuito per il comando simultaneo impulsivo e la commutazione automa tica da trasmissione a ricezione per sistemi impieganti una plurali ta di trasduttori piezoelettrici ad ultrasuoni
JPS598891B2 (ja) * 1974-11-26 1984-02-28 ソニー株式会社 回転磁気ヘッド装置
US3955049A (en) * 1974-12-04 1976-05-04 Florida Data Corporation Printing head
US3971250A (en) * 1975-02-18 1976-07-27 Minnesota Mining And Manufacturing Company Electret sensing medium having plural sensing units
DE2537760A1 (de) * 1975-08-25 1977-03-10 Siemens Ag Piezoelektrischer motor
JPS6059787B2 (ja) * 1975-10-14 1985-12-26 ソニー株式会社 映像信号再生装置
US4080636A (en) * 1976-03-19 1978-03-21 Ampex Corporation System for damping vibrations in a deflectable transducer
GB1579854A (en) * 1976-03-19 1980-11-26 Ampex Method and apparatus for producing time base altered effects in data recording and reproducing apparatus
JPS5335511A (en) * 1976-09-13 1978-04-03 Sony Corp Recorder-reproducer for picture signal
US4099211A (en) * 1976-09-13 1978-07-04 Ampex Corporation Positionable transducing mounting structure and driving system therefor

Also Published As

Publication number Publication date
IT1101699B (it) 1985-10-07
DK153608C (da) 1989-01-02
AU523309B2 (en) 1982-07-22
FR2413840B1 (fr) 1985-11-22
BR7808536A (pt) 1979-07-10
AU4226078A (en) 1979-07-05
AT374940B (de) 1984-06-12
US4237399A (en) 1980-12-02
SU1367845A3 (ru) 1988-01-15
NL191375B (nl) 1995-01-16
GB2011734A (en) 1979-07-11
NL191375C (nl) 1995-06-16
NL7812079A (nl) 1979-07-03
ATA936778A (de) 1983-10-15
CA1132707A (en) 1982-09-28
FR2413840A1 (fr) 1979-07-27
DE2856508C2 (es) 1993-07-29
DE2856508A1 (de) 1979-07-12
SE7813380L (sv) 1979-06-30
DK153608B (da) 1988-08-01
CH626764A5 (es) 1981-11-30
JPS6123569B2 (es) 1986-06-06
JPS5492307A (en) 1979-07-21
DK584878A (da) 1979-06-30
GB2011734B (en) 1982-08-18
IT7831422A0 (it) 1978-12-29
SE438222B (sv) 1985-04-01

Similar Documents

Publication Publication Date Title
ES476411A1 (es) Un transductor piezoelectrico
US3706861A (en) Apparatus for mounting and spacing a signal transducer with respect to a recording medium
ATE157798T1 (de) Informationsaufzeichnungs/wiedergabegerät
JPS5996880A (ja) 電気機械変換装置
IT7968131A0 (it) Dispositivo per l applicazione di una tensione di controllo ad un elemento posizionatore piezoelettrico particolarmente a scopo di posizionamento di un elemento di registrazione e o riproduzione rispetto ad una pista di informazioni
US3526899A (en) Magneto-acoustic transducer for high track density recording
JPS57158041A (en) Magnetic transfer recorder
JPH0619820B2 (ja) 磁気ヘッド位置制御装置
CA1223066A (en) Apparatus for recording and reproducing information on a record carrier in the form of a tape
GB1418322A (en) Magnetic transducer head
JPS5522284A (en) Magnetic head device
GB1478179A (en) Magnetic erasing heads
US4455581A (en) Self-correcting record-play system and method
JPS647464Y2 (es)
JPS55129929A (en) Magnetic recording and reproducing device
US3479036A (en) Nonelectronic magnetic recording system
JPS5532271A (en) Electro-mechanical converting element unit
JPS6032259B2 (ja) 記録再生機
JPS6045927A (ja) 回転シリンダ装置
JPS56114123A (en) Magnetic head dispalcing device
SU1068996A1 (ru) Видеомагнитофон с наклонно-строчной записью сигналов
GB2015781A (en) Auto-tracking control systems for apparatus for reproducing video signals
JPS595019U (ja) 記録再生装置におけるヘツド支持装置
JPS6133220U (ja) 磁気記録再生装置
GB904036A (en) Improvements in or relating to apparatus for recording and reproducing electrical signals

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19911118