Safety latch for pickup heads and carriage disc drive

Details Safety latch for pickup heads and carriage disc drive Safety latch for pickup heads and carriage disc drive

1983-06-28

1986-06-10

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360104, 360106, 360107, 310 10, 310 12, G11B 554, G11B 2122, G11B 548, H02K 0000, G11B 548

Patent

active

045946272

ABSTRACT:
A safety latch is provided for a disc drive to prevent accidental movement of the pickup heads across the recording surface of a disc when power to the disc drive is terminated. The safety latch includes a magnet which engages a mechanical stop for limiting the inward travel of the pickup head assembly. In a preferred embodiment the magnet is mounted on the bobbin of a linear motor which moves the pickup head assembly.

REFERENCES:
patent: 3626113 (1971-12-01), Jones et al.
patent: 3668443 (1972-06-01), Schwartz
patent: 3743794 (1972-03-01), Miller, III
patent: 3852816 (1974-12-01), Stewart
patent: 3981245 (1976-09-01), Buzzell et al.
patent: 4058844 (1977-11-01), Dirks
patent: 4110802 (1978-08-01), Ho et al.
patent: 4218714 (1980-08-01), Isozaki et al.
patent: 4305105 (1981-12-01), Ho et al.
patent: 4439699 (1984-03-01), Brende et al.
patent: 4484241 (1984-11-01), Brende et al.
IBM Technical Disclosure Bulletin, vol. 26, No. 3B, Aug. 1983, Brende et al., "Magnetic Home Latch Assembly", pp. 1693-1694.
IBM Technical Disclosure Bulletin, vol. 15, No. 3, Aug. 1972, Chai et al., "Linear Actuator", p. 917.
IBM Technical Disclosure Bulletin, vol. 21, No. 1, Jun. 1978, Borg et al., "Bidirectional Crash Stop Removable with Head-Disk Assembly", p. 312.

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