Rotating magnetic head piezo-electric assembly and drive circuit

Details Rotating magnetic head piezo-electric assembly and drive circuit Rotating magnetic head piezo-electric assembly and drive circuit

1979-01-16

1980-11-11

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record editing

310331, 310332, 360 70, 360 77, 360109, G11B 2110, G11B 2118

Patent

active

042336376

ABSTRACT:
A magnetic head assembly for a video tape recorder includes a piezo-electric support, preferably constituted by a bi-morph leaf or leaves, supported at one end, for example, on a rotary portion of a tape guide drum, and a magnetic head mounted at the other end of the piezo-electric support, and the piezo-electric support has two pairs of first and second electrodes secured on opposed major surfaces, respectively, of the support and extending in the direction between the ends of the support, that is, in the lengthwise direction of the latter, with such pairs of electrodes being parallel and spaced from each other in the direction across the support. Thus, by applying suitable control voltages between the first and second electrodes of the two pairs thereof, the piezo-electric support can be made to flex or bend longitudinally and/or torsionally, for example, for correcting tracking erros and/or for varying the azimuth angle, respectively, of the mounted head.

REFERENCES:
patent: 2478223 (1949-08-01), Argabrite
patent: 3247404 (1966-04-01), Batsch
patent: 3821787 (1974-06-01), Kihara
patent: 4080636 (1978-03-01), Ravizza
patent: 4099211 (1978-07-01), Hathaway
patent: 4143405 (1979-03-01), Kubota

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