Scanning device for magnetic tape with special disposition of ro

Details Scanning device for magnetic tape with special disposition of ro Scanning device for magnetic tape with special disposition of ro

1992-02-10

1994-01-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

36013024, G11B 552, G11B 1561

Patent

active

052787150

ABSTRACT:
For oblique track scanning of magnetic tape which is looped around a two-part drum (1, 2) separated by a gap (5) in which magnetic heads (11) affixed to a headwheel revolve, the rotary transformers connecting the magnetic heads on the headwheel to fixed parts of the scanning device are provided by inner and outer magnetic core rings in which windings are embedded for a number of transformers. One group of these rotary transformers (18, 19) is located above the headwheel disk structure (10, 25) in such a way that outer magnetic core rings are fixed in a bore of the fixed upper drum (1) and inner magnetic core rings (19) are affixed to a seating shell (25) that connects the headwheel disk (10) to its driving shaft. Another group of rotary transformers (10, 21) is located beneath the rotary headwheel disk structure (10, 25) and in this case the outer magnetic core rings (20) are affixed to the inner wall of the rotary headwheel disk structure (10, 25) and the inner magnetic core rings are affixed to the outer wall of the bearing (15) of the shaft (14) that drives the rotary headwheel disk.

REFERENCES:
patent: 4080639 (1978-03-01), Gunschmann
patent: 4156261 (1979-05-01), Wolf
patent: 4654738 (1987-03-01), Kato et al.
patent: 4706143 (1987-11-01), Asada et al.
patent: 4706144 (1987-11-01), Asada et al.
patent: 4961122 (1990-10-01), Sakai et al.

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