JPS55139602A - Pickup arm unit - Google Patents
Pickup arm unitInfo
- Publication number
- JPS55139602A JPS55139602A JP4414979A JP4414979A JPS55139602A JP S55139602 A JPS55139602 A JP S55139602A JP 4414979 A JP4414979 A JP 4414979A JP 4414979 A JP4414979 A JP 4414979A JP S55139602 A JPS55139602 A JP S55139602A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- axis
- electromagnetic
- detecting method
- cartridge
- 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 make it possible to damp the low frequency resonance of every cartridge best without any adjustment by coaxially providing an electromagnetic detecting method and electromagnetic driving method to the axis of rotation of a pickup arm.
CONSTITUTION: Arm holder 17 supported being vertically rotatable on vertical rotation axis 5 is provided with pickup arm 1 and weight shaft 18. At both the ends of arm holder 17, electromagnetic detecting method 15 detecting arm 1 rotating on axis 5 and electromagnetic driving method 16 driving arm 1 to rotate on axis 5 are provided being coaxial to axis 5. The output signal of detecting method 15 proportional to the vertical rotating motion of arm 1 drives driving method 16 through filter 12 and amplifier 13 to damp its low frequency resonance. Even when cartridge 2 is replaced, this constitution makes the output of detecting method 15 constant without reference to an in-use cartridge, and consequently an adjustment of the gain of amplifier 13 is unneeded.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4414979A JPS55139602A (en) | 1979-04-13 | 1979-04-13 | Pickup arm unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4414979A JPS55139602A (en) | 1979-04-13 | 1979-04-13 | Pickup arm unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55139602A true JPS55139602A (en) | 1980-10-31 |
Family
ID=12683565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4414979A Pending JPS55139602A (en) | 1979-04-13 | 1979-04-13 | Pickup arm unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55139602A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101107200B1 (en) * | 2009-04-22 | 2012-01-25 | 대호 (주) | Harrow for Tractor |
-
1979
- 1979-04-13 JP JP4414979A patent/JPS55139602A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101107200B1 (en) * | 2009-04-22 | 2012-01-25 | 대호 (주) | Harrow for Tractor |
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