Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-04-04
2006-04-04
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07023643
ABSTRACT:
A method and apparatus for transducer position detection uses inert contact surfaces to engage an actuator temporarily. The inert contact surfaces are part of an apparatus that also includes an optical sensor such as a retroreflector or diffraction grating. The assembly is thus configured to permit multiple uses while exerting a near-zero net torque about the length of the arm that supports the transducer. This is useful where there is a temporary need for especially precise position control, such as when servowriting a data storage media surface.
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“Accurate Axis Coupler for Rotary Actuator Control,” Oct. 1, 1989, IBM TDB vol. 32, No. 5A, pp. 460-461.
Runyon John Frederick
Toffle Mark August
Weichelt Brent Melvin
Berger Derek J.
Habermehl James L
Hudspeth David
Lucente David K.
Seagate Technology LLC
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