Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1986-12-03
1989-03-21
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360109, 318634, 318117, 310306, G11B 5596
Patent
active
048149080
ABSTRACT:
An apparatus and method for positioning a transducer over the center of a track is disclosed. An arm carries the transducer. Embedded in the arm is a heating element. The heating element is positioned so that the linear expansion or contraction of the arm resulting from the temperature rise or drop due to the amount of heat applied to the arm by the heating element will move the transducer across the track. In operation, a constant amount of heat is initially applied to the arm to center the transducer. During tracking, a circuit varies the amount of power applied to the heating element so that the transducer is kept over the center of the track.
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American Heritage Dictionary Second College Edition, Houghton Mifflin Company, 1983, p. 127.
Xerox Disclosure Journal, vol. 5, No. 5, "Thermal Servo System For Mechanical Positioning", Anderson et al., 10/80, p. 549.
IBM TDB, vol. 16, No. 5, "Magnetic Head with Piezoelectric Positioning", Stokes et al., 10/73, p. 1429.
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Angus Robert M.
Billion Richard E.
Faber Alan
Garland Steven R.
Genovese Joseph A.
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