Rotary magnetic head apparatus

Details Rotary magnetic head apparatus Rotary magnetic head apparatus

1991-01-30

1993-04-13

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 84, 360123, G11B 552, G11B 517

Patent

active

052028054

ABSTRACT:
The rotary magnetic head apparatus of this invention exhibits an optimum transfer characteristic similar to that in the conventional apparatuses even when the number of coil turns for the magnetic head is reduced to 10 or less. This is achieved by setting the number of secondary winding turns for the rotary transformer to 16 or less and by setting the number of primary winding turns for the rotary transformer in such a way that a product of a step-up ratio--defined as the number of secondary winding turns divided by the number of primary winding turns--and the number of coil turns will be around 50. This reduction in the number of turns of coil on the magnetic head, from 20 or 25 with the conventional apparatus to less than 10, results in a substantial reduction in the cost of magnetic head and therefore the rotary magnetic head apparatus.

REFERENCES:
patent: 4497004 (1985-01-01), Shibata et al.
patent: 4598325 (1986-07-01), Tarzaiski

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