JPS5613502A - Linear tracking arm unit - Google Patents
Linear tracking arm unitInfo
- Publication number
- JPS5613502A JPS5613502A JP8858979A JP8858979A JPS5613502A JP S5613502 A JPS5613502 A JP S5613502A JP 8858979 A JP8858979 A JP 8858979A JP 8858979 A JP8858979 A JP 8858979A JP S5613502 A JPS5613502 A JP S5613502A
- Authority
- JP
- Japan
- Prior art keywords
- base
- controlled
- slit
- pickup arm
- improve
- 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.)
- Pending
Links
Abstract
PURPOSE: To improve an SN ratio in record reproduction by cutting off tranfer of external vibrator by floating a pickup arm base through an electromagnetic coil driven and controlled in accordance with movement from a reference position.
CONSTITUTION: Arm base 1 having a fixed pickup arm moves vertically through driving coil 12a between permanent magnets 10 and 11. Then, its movement position is detected through light source 14a and CdS photodetector 13a provided to base 1 on the basis of slit 15a provided to a fixed position of slit plate 15 and electric power supplied to coil 12a is controlled by a differential voltage that corresponds to the detected position, so that the base will automatically be controlled and positioned at the reference position determined by slit 15a. Base 1, therefore, floats vertically and is also placed in a float state in terms of two other directions perpendicular to the vertical directon to cut off transfer of external vibration, caused by a motor, etc., to base 1, so that S/N in record reproduction by the pickup arm by the ecxternal vibration will improve.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8858979A JPS5613502A (en) | 1979-07-11 | 1979-07-11 | Linear tracking arm unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8858979A JPS5613502A (en) | 1979-07-11 | 1979-07-11 | Linear tracking arm unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5613502A true JPS5613502A (en) | 1981-02-09 |
Family
ID=13947011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8858979A Pending JPS5613502A (en) | 1979-07-11 | 1979-07-11 | Linear tracking arm unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5613502A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5811039A (en) * | 1981-07-13 | 1983-01-21 | Nippon Soda Co Ltd | Adsorbent having giant heterocyclic structure |
US4476007A (en) * | 1983-05-20 | 1984-10-09 | Eastman Kodak Company | Hemispherands and sodium-selective compositions and electrodes containing same |
US4505800A (en) * | 1983-05-20 | 1985-03-19 | Eastman Kodak Company | Sodium-selective compositions and electrodes containing same |
US4933070A (en) * | 1981-12-21 | 1990-06-12 | Eastman Kodak Company | Hemispherands in ion-selective compositions |
-
1979
- 1979-07-11 JP JP8858979A patent/JPS5613502A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5811039A (en) * | 1981-07-13 | 1983-01-21 | Nippon Soda Co Ltd | Adsorbent having giant heterocyclic structure |
JPH0218135B2 (en) * | 1981-07-13 | 1990-04-24 | Nippon Soda Co | |
US4933070A (en) * | 1981-12-21 | 1990-06-12 | Eastman Kodak Company | Hemispherands in ion-selective compositions |
US4476007A (en) * | 1983-05-20 | 1984-10-09 | Eastman Kodak Company | Hemispherands and sodium-selective compositions and electrodes containing same |
US4505800A (en) * | 1983-05-20 | 1985-03-19 | Eastman Kodak Company | Sodium-selective compositions and electrodes containing same |
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