JPS5478994A - Electric mechanical conversion element - Google Patents
Electric mechanical conversion elementInfo
- Publication number
- JPS5478994A JPS5478994A JP14646877A JP14646877A JPS5478994A JP S5478994 A JPS5478994 A JP S5478994A JP 14646877 A JP14646877 A JP 14646877A JP 14646877 A JP14646877 A JP 14646877A JP S5478994 A JPS5478994 A JP S5478994A
- Authority
- JP
- Japan
- Prior art keywords
- porcelain
- temperature
- normal
- dielectric
- accuracy
- 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
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
PURPOSE: To increase the accuracy of positioning adjustment of magnetic head etc. by reducing the residual displacement, through the use of porcelain plate in normal dielectric phase within the operating temperature.
CONSTITUTION: As the electric mechanical conversion element used for high positioning control having high magnetic rod accuracy narrow in the recording track width for VTR etc., the material in which the residual polarization is less and the part comparatively greater dielectric constant is present at normal temperature is utilized as the normal dielectric phase at slightly higher temperature than the Curie temperature of a high dielectric porcelain. As an example, the porcelain plate 11 of a suitable size in which the Curie temperature is about -10°C and the dielectric constant at normal temperature is about 100000 is used, and the element 10 of bimorph construction is constituted by clipping the metal substrate 13 between two porcelain plates forming the electrodes 12a and 12b for the both major planes. The amount of residual displacement due to electrorestriction effect when the polarity of the applied voltage to the element 10 is inverted with the power supply 14, is about 1.4% to the maximum amplitude, and it is less around one digit than utilizing the piezoelectric effect of the ferrodielectric porcelain and the positioning adjustment of head can be made with good accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52146468A JPS5936440B2 (en) | 1977-12-06 | 1977-12-06 | Electrical/mechanical conversion element |
CA317,192A CA1125343A (en) | 1977-12-06 | 1978-12-01 | Dielectric electro-mechanical transducer |
GB7846885A GB2012106B (en) | 1977-12-06 | 1978-12-01 | Electro-mechanical transducers |
NLAANVRAGE7811863,A NL185640C (en) | 1977-12-06 | 1978-12-05 | ELECTROMECHANICAL TRANSDUCENT. |
FR7834405A FR2411533A1 (en) | 1977-12-06 | 1978-12-06 | ELECTROMECHANICAL TRANSDUCER |
DE19782852795 DE2852795A1 (en) | 1977-12-06 | 1978-12-06 | ELECTROMECHANICAL CONVERTER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52146468A JPS5936440B2 (en) | 1977-12-06 | 1977-12-06 | Electrical/mechanical conversion element |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5478994A true JPS5478994A (en) | 1979-06-23 |
JPS5936440B2 JPS5936440B2 (en) | 1984-09-04 |
Family
ID=15408311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52146468A Expired JPS5936440B2 (en) | 1977-12-06 | 1977-12-06 | Electrical/mechanical conversion element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5936440B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5528264U (en) * | 1978-08-14 | 1980-02-23 | ||
JPS58173260U (en) * | 1982-05-13 | 1983-11-19 | 日立電子株式会社 | Bimorph for VTR etc. |
JPS6048259U (en) * | 1983-09-10 | 1985-04-04 | 株式会社トーキン | displacement element |
JPS6048260U (en) * | 1983-09-10 | 1985-04-04 | 株式会社トーキン | piezoelectric displacement element |
JPS60245286A (en) * | 1984-05-21 | 1985-12-05 | Murata Mfg Co Ltd | Piezoelectric dispacement element |
JP4874419B1 (en) * | 2010-12-03 | 2012-02-15 | 株式会社アドバンテスト | Switch device and test device |
-
1977
- 1977-12-06 JP JP52146468A patent/JPS5936440B2/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5528264U (en) * | 1978-08-14 | 1980-02-23 | ||
JPS58173260U (en) * | 1982-05-13 | 1983-11-19 | 日立電子株式会社 | Bimorph for VTR etc. |
JPH0211796Y2 (en) * | 1982-05-13 | 1990-04-03 | ||
JPS6048259U (en) * | 1983-09-10 | 1985-04-04 | 株式会社トーキン | displacement element |
JPS6048260U (en) * | 1983-09-10 | 1985-04-04 | 株式会社トーキン | piezoelectric displacement element |
JPS60245286A (en) * | 1984-05-21 | 1985-12-05 | Murata Mfg Co Ltd | Piezoelectric dispacement element |
JP4874419B1 (en) * | 2010-12-03 | 2012-02-15 | 株式会社アドバンテスト | Switch device and test device |
US8779751B2 (en) | 2010-12-03 | 2014-07-15 | Advantest Corporation | Switching apparatus and test apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS5936440B2 (en) | 1984-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5478994A (en) | Electric mechanical conversion element | |
JPS5312255A (en) | Electronic clock | |
JPS5478993A (en) | Electric mechanical conversion element | |
JPS54120899A (en) | Macromolecule complex piezo material | |
JPS52108776A (en) | Pattern sticking device | |
JPS55122230A (en) | Rotary head type magnetic picture recording and reproducing device | |
JPS6440508A (en) | Orientated liquid crystal film and production thereof | |
JPS5522284A (en) | Magnetic head device | |
JPS5357837A (en) | Electrostatic recording body | |
JPS55129929A (en) | Magnetic recording and reproducing device | |
JPS5467448A (en) | Optical controller | |
JPS5279690A (en) | Electromic display cell | |
JPS51133750A (en) | Discharge gap means | |
Bozhko et al. | Nonlinear Resonance of Helicons in an Aluminum Plate | |
JPS56130983A (en) | Manufacture of high molecular and inorganic composite piezoelectric unit | |
JPS51119387A (en) | Nematic liquid crystal composition | |
JPS5379299A (en) | Porcelain composition of high inductivity | |
JPS5372556A (en) | Piezoelectric oscillator | |
JPS536050A (en) | Optical deflector | |
JPS5687057A (en) | Electrostatic recording electrode head | |
JPS5582245A (en) | Atomizing vibrator | |
GB1094677A (en) | Integral heater piezoelectric devices | |
JPS5467447A (en) | Electrochromic display device | |
JPS53133472A (en) | Impedance change detecting circuit | |
JPS53142039A (en) | Method of producing electrostrictive vibrator |