Rotary head drum apparatus with resiliently mounted ground plate

Details Rotary head drum apparatus with resiliently mounted ground plate Rotary head drum apparatus with resiliently mounted ground plate

1990-11-13

1992-05-12

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 84, 36013022, 36013024, G11B 552, G11B 1560

Patent

active

051132982

ABSTRACT:
In a rotary head drum apparatus having a magnetic head attached to a rotary drum member and connected to a coil of a rotor of a rotary transformer so that a signal is transmitted between the magnetic head and a stationary drum member through the rotary transformer, a resilient contactor is mounted on one of the rotary drum member and the rotor of the rotary transformer, and a contact portion is formed on the other of the rotor and the rotary drum member so as to be contacted by the resilient contactor when the rotary drum and the rotary transformer are assembled with each other. The apparatus further includes an aperture bored through an end face of the stationary drum member and a ground contact pin which is flexible in its radial direction is inserted into the aperture for connecting the stationary drum member to ground. Further, the rotary or stationary drum member is rotatably supported through a support shaft secured in a bore of the stationary or rotary drum member, respectively, and at least one concave or undercut annulus is formed in the inner surface of the bore into which the support shaft is the inserted with a press-fit so as to be secured to the inner surface of the bore at its lands or portions above and below the concave or undercut annulus.

REFERENCES:
patent: 4740848 (1988-04-01), Schild et al.
patent: 4835645 (1989-05-01), Ohji et al.
patent: 5010432 (1991-04-01), Fukushima et al.

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