Disc record player
AssigneePlessey Handel und Investments AG
InventorsBrian P. Taylor, Khalid O. Chaudry
Life of this patent
Estimating the term…
Abstract
A disc record player including a pick up arm, a linear type electric actuating motor for effecting tangential tracking of the pick up arm and feed back means for providing a motor control feed back signal representative of at least one of velocity and acceleration of the pick up arm.
Claims14
A disc record player including a pickup arm for tracking a disc record, said record player comprising feedback means responsive to at least one of velocity and acceleration of the pickup arm for producing a motor control signal, and means including a linear type electric actuating motor responsive to said motor control signal for causing said pickup arm to tangentially track said record.
A disc record player including a pickup arm for tracking a disc record, said record player comprising feedback means, responsive to at least one of the velocity or acceleration of said pickup arm, for producing a motor control signal, and means including a linear type electric motor, responsive to said motor control signal, for causing said pickup arm to tangentially track said record, the motor comprising a pair of opposed magnetizable members which are magnetically linked, a strip magnet arranged between the members and carried by one of them, said magnet having opposite ends of the same polarity, coil means provided around one of the opposed members, a wheeled carriage arranged to bridge the pair of members and to carry upon opposite surface portions the coil means and the pickup arm, a pair of wheels mounted on the carriage and having grooved rims arranged to engage a first guide rod positioned to one side of the pair of members, a third wheel mounted on the carriage opposed to the pair of wheels and arranged to run along a second guide rod positioned to a side of the pair of members opposite to the said one side.
Dependencies are inferred from the claim text.