发明名称 |
CONTROLLING POSITION OF A ROTATABLE TRANSDUCER IN DEVICES EMPLOYING SUCH TRANSDUCERS |
摘要 |
An optical disk recorder, or other apparatus, use a rotary actuator for supporting a work tool, such as an objective lens which is pivotable or rotatable about a pivot pin. Rotation causing or tracking coils on the rotary actuator are disposed adjacent to permanent magnets to selectively effect rotation of the rotary actuator about the pivot pin. A bias electrical current is supplied to these coils to generate magnetic fields which are in opposite rotational senses; such fields force the rotary actuator against the pin in such a manner that the point of contact between the rotary actuator and the pin follows the rotation of the actuator about the pin.
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申请公布号 |
CA2039351(C) |
申请公布日期 |
1995.09.26 |
申请号 |
CA19912039351 |
申请日期 |
1991.03.28 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CHILDERS, EDWIN RALPH;FENNEMA, ALAN AUGUST;MCREYNOLDS, DAVID PAUL |
分类号 |
G11B5/596;G11B7/08;G11B7/09;G11B21/00;G11B33/08;(IPC1-7):G11B7/095;G11B7/00 |
主分类号 |
G11B5/596 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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