Dynamic magnetic information storage or retrieval – Miscellaneous
Patent
1988-05-05
1989-09-26
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Miscellaneous
G11B 553
Patent
active
048705250
ABSTRACT:
A rotary actuator having at least two legs or arms extending from the distal end of a body containing a bore through which passes a shaft about which the body rotates. A frame extends from the opposite end of the body to support a flat coil which, when the actuator is assembled, cooperates with magnets to function as a rotary "voice coil". The entire structure (i.e. the legs, body and frame) is formed as a monolithic structure by casting aluminum or some other non-magnetic metal. Other manufacturing techniques may be used, such as investment casting, machining or extrusion. Hence, no assembly is needed to join the legs or the coil-support frame to the body. Flexure elements are secure to the legs and each flexure element has a hollow pin that is placed within an opening of a respective actuator leg. A ball is driven downwardly through each hollow pin to expand that pin laterally and thus wedge the flexure into firm contact with a mounting pad on the leg. The ball is driven through all the pin/pad holes in succession for a one-step mounting operation for the multi-arm actuator.
REFERENCES:
patent: 4707754 (1987-11-01), Patel et al.
patent: 4754353 (1988-06-01), Levy
Embery John M.
Morris Richard W.
Wong Walter
Hecker Stuart N.
MiniScribe Corporation
Severin David J.
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