Stackable linear actuator using embedded coil carriages

Details Stackable linear actuator using embedded coil carriages Stackable linear actuator using embedded coil carriages

1991-10-17

1994-03-08

Westin, Edward P.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

F11B 555

Patent

active

052932907

ABSTRACT:
A stackable linear actuator using flat, planar carriages. Each carriage is formed of two thin fiber reinforced outer surfaces having a low density composite core between each of the outer surfaces. A flat single layer coil is mounted within the composite core. The carriages are mounted for relative movement in a vertical stack. Between each carriage is a set of permanent magnets of opposing polarity. The sets of magnets are aligned so that magnets of similar polarity are aligned vertically. A steel plate is attached at the top of the stack. Another steel plate is attached to the bottom of the stack. These plates shunt the magnetic flux to form a continuous loop of magnetic flux through the entire stack. The carriages are operated by supplying the coils with current of varying intensity and polarity.

REFERENCES:
patent: 4331990 (1982-05-01), Frandsen
patent: 4506307 (1985-03-01), Watrous
patent: 4612592 (1986-09-01), Frandsen
patent: 4620253 (1986-10-01), Garwin et al.
patent: 4669013 (1987-05-01), Scranton et al.
patent: 4967293 (1990-10-01), Aruga et al.
patent: 5067037 (1991-11-01), Anath et al.
patent: 5134532 (1992-07-01), Svendsen et al.

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