Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1976-09-13
1978-07-04
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 76, 360 77, 360107, G11B 552, H04N 578, G11B 2118, G11B 2110
Patent
active
040992110
ABSTRACT:
In a system mounting a magnetic transducer on the end of a thin leaf for sweeping motion displacement laterally to a track on a record surface, the present invention utilizes elements arranged as reversely deflectable leaf portions so as to maintain the transducer in substantially undeviating (normal) orientation with respect to the record surface. In one embodiment, the cantilevered leaf is composed of inner and outer (inboard and outboard) piezoelectric ("bimorph") bender elements having opposite polarizations and being cross-wired to produce the reverse deflections desired. The electrodes of the elements may also be divided longitudinally and coupled to bias voltage sources to provide controlled correction of azimuth error.
REFERENCES:
patent: 3126535 (1964-03-01), Streeter
patent: 3526726 (1967-09-01), Corbett et al.
patent: 3748408 (1973-07-01), Warren
patent: 3787616 (1974-01-01), Falk
patent: 3994018 (1976-11-01), Kihara et al.
IBM Tech. Disc. Bull., Price, Video Tape Recorder with Oscillating Head, vol. 12, No. 1, Jun. 1969, pp. 33-34.
Ampex Corporation
Carman, Jr. Charles M.
Clay Robert G.
Eddleman Alfred H.
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