Combination of reproducing heads and a rotary transformer device

Details Combination of reproducing heads and a rotary transformer device Combination of reproducing heads and a rotary transformer device

1983-11-22

1987-01-27

Faber, Alan

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 64, 360 84, 360 21, G11B 552

Patent

active

046398058

ABSTRACT:
A rotary transformer is employed in a 4-head type recording and/or reproducing apparatus which has a rotary body which is wrapped with a magnetic tape, and four heads mounted 90.degree. apart from each other on the rotary body for recording and/or reproducing a video signal onto and/or from the tape. The rotary transformer device comprises a rotary core which has five circular grooves formed in one surface thereof and is rotated unitarily with the rotary body, a first short-circuiting ring embedded in a center groove among the five grooves of the rotary body, first through fourth ring-shaped coils embedded in the remaining four grooves of the rotary body, a stationary core which is stationary at a location separated from and opposing the rotary core and has five circular grooves, a second short-circuiting ring embedded in a center groove among the five grooves of the stationary core, and fifth through eighth ring-shaped coils embedded in the remaining four grooves of the stationary core. The first and second ring-shaped coils which are located on one side with respect to the first short-circuiting ring, are coupled to one pair of mutually opposing heads among the four heads. The third and fourth ring-shaped coils which are located on a side opposite from the one side with respect to the first short-circuiting ring, are coupled to the other pair of mutually opposing heads.

REFERENCES:
patent: 4031558 (1977-06-01), Kusaka
patent: 4178606 (1979-12-01), Hirota
patent: 4358799 (1982-11-01), deNiet
patent: 4364098 (1982-12-01), Hirota
patent: 4497004 (1985-01-01), Shibata
patent: 4517615 (1985-05-01), Hino
Patents Abstracts of Japan, vol. 6, No. 111 (E-114) [989], Jun. 22, 1982; & JP-A-57 40 906.
Soviet Inventions Illustrated, Section EL, Week E37, Oct. 27, 1982; & SU-A-881-838.

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