High performance linear actuator for memory storage device

Details High performance linear actuator for memory storage device High performance linear actuator for memory storage device

1988-10-18

1990-11-27

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555, G11B 2108

Patent

active

049741071

ABSTRACT:
A high performance linear actuator for a memory storage device includes a carriage having bearings at opposed sides thereof for engaging a pair of rail members. One of the pair of rail members is preloaded against the respective carriage bearings to provide structural stiffness and increased resonant frequency to the carriage assembly. Another set of bearings straddle a third rail member extending medially between the pair of rail members. An electromagnetic coil motor is secured to the carriage and disposed to engage an E-frame driving magnet, with the force vector of the coil extending parallel to the rail members and proximate to the center of gravity of the carriage assembly. A plurality of read/write heads is secured laterally adjacent to the electromagnetic assembly and extend toward the magnetic storage medium. The E-frame is closed at both ends to prevent flux leakage. An electronic latch under program control engages and immobilizes the carriage whenever the system is not operating.

REFERENCES:
patent: 3587075 (1971-06-01), Brown et al.
patent: 4247794 (1981-01-01), Jooss et al.
patent: 4319354 (1982-03-01), Manzke et al.
patent: 4414594 (1983-11-01), Farmer et al.
patent: 4427905 (1984-01-01), Sutton
patent: 4484241 (1984-11-01), Brende et al.

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