Head drum with magnetic mounting of rotary transformer

Details Head drum with magnetic mounting of rotary transformer Head drum with magnetic mounting of rotary transformer

2005-07-26

2005-07-26

Renner, Craig A. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head mounting

For moving head during transducing

C360S271000, C360S271200, C360S130220, C360S130240

Reexamination Certificate

active

06922315

ABSTRACT:
According to a first aspect the present invention is related to a head drum arrangement allowing a much easier mounting of the rotary transformer. The head drum arrangement comprises a non-rotating lower drum and a rotating upper drum, which are connected by a shaft fixed in the lower drum. The upper drum is mounted on the shaft by a bearing and preferably by two ball bearings. A rotary transformer is arranged between the lower drum and the upper drum having a fixed stator and a rotor rotating jointly with the upper drum. The rotor is non-positively held in its position by the magnetic force of a permanent magnet accommodated in the upper drum.

REFERENCES:
patent: 4814917 (1989-03-01), Nonoyama
patent: 5086361 (1992-02-01), Kawada et al.
patent: 5317466 (1994-05-01), Hasegawa
patent: 5715112 (1998-02-01), Oh
patent: 5719723 (1998-02-01), Kim
patent: 5734213 (1998-03-01), Oh
patent: 5936809 (1999-08-01), Nishida et al.
patent: 0 273 620 (1988-07-01), None
patent: 0 720 156 (1996-07-01), None

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