John Edwin Van Dell
Engineers in Irvine, CA
License number
Colorado 11718
Issued Date
Feb 17, 1973
Renew Date
Mar 1, 2003
Expiration Date
Feb 28, 2005
Type
Professional Engineer
Address
Address
25 Elmcroft Way, Irvine, CA 92614
Professional information
Magnetic Head Positioning Apparatus
US Patent:
4747004, May 24, 1988
Filed:
Apr 7, 1986
Appl. No.:
6/849146
Inventors:
Jagmohan S. Kukreja - Claremont CA
John C. Van Valkenburgh - Irvine CA
Kurt A. Buckland - Irvine CA
John C. Van Valkenburgh - Irvine CA
Kurt A. Buckland - Irvine CA
Assignee:
Archive Corporation - Costa Mesa CA
International Classification:
G11B 555
US Classification:
360106
Abstract:
A magnetic read/write head is mounted on a carriage having a semi-circular recess therein. A threaded lead screw is partially surrounded by the recess. A partial nut having an arcuate front surface with two male thread segments thereon engages the lead screw. The partial nut is supported on the carriage so that rotation of the screw causes movement of the carriage relative to the screw, in a direction parallel to the longitudinal axis of the screw. The partial nut is biased into engagement with the screw by a coil spring which extends between the partial nut and a cap which is spaced from the rear surface of the partial nut. The spring applies a constant, predetermined force on the partial nut. The direction of the spring force is substantially parallel to the longitudinal axis of the spring. Thus, the head can be precisely positioned by the rotation of the lead screw.