Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1995-05-04
1996-07-16
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360109, 360 7802, 74 8914, 74 8915, G11B 2102, G11B 2112, F16H 116
Patent
active
055372759
ABSTRACT:
A magnetic head positioning mechanism for a tape backup device includes a carriage carrying the head that has an opening with a substantially conical surface, a guide rod extending through the carriage that restricts translation of the carriage to motion along a predetermined axis, a lead screw extending into the opening in the carriage that is driven by a stepper motor via a gear train, a follower nut threaded on the upper portion of the lead screw for translating the carriage and head along the axis as the lead screw is rotated by the stepper motor, and a spring for urging the carriage into contact with the follower nut. The base end of the lead screw has a conical indentation that contacts and rotates on the rounded end of a protrusion extending from the chassis. The relative positions of this indentation and protrusion can be reversed, if desired. The follower nut includes a rounded (or spherical) surface for contacting the conical surface within the opening in the carriage. The combination of the conical indentation at the base of the lead screw and the rounded surface on the follower nut at the upper portion of the lead screw allows the lead screw to pivot and self-align. This relaxes the required tolerances for alignment and simplifies assembly of the device.
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EPO Search Report, Application No. GB9424223.7, P. R. Slater, Mar. 8, 1995.
Angellotti Thomas J.
Beitscher Warren S.
Peace Steven L.
Stephens Fred O.
Hewlett--Packard Company
Levy Stuart S.
Ometz David L.
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