Upper head drum assembly including at least one nut cap

Details Upper head drum assembly including at least one nut cap Upper head drum assembly including at least one nut cap

1995-10-11

1996-12-03

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

36013024, G11B 552, G11B 556

Patent

active

055814263

ABSTRACT:
An upper drum assembly for use in a video cassette recorder includes an upper drum having an inner part with a top surface and an outer side surface with one or more head windows, the inner part thereof being provided with recesses, one or more openings and one or more through holes, one or more heads, the head having a head chip joined to a head base, one or more first screws, one or more second screws and one or more nut caps, each of the nut caps having a fixed part provided with a first tapped hole corresponding to the through hole in the upper drum, a body part provided with a second tapped hole, and a stepped part. Each of the nut caps is fitted onto the upper drum in such a way that the body part therein is fitted into one of the openings, the fixed part therein is placed on the top surface of the inner part of the upper drum, and the stepped part is placed into the corresponding recess. One of the first screws is fastened from bottom up through one of the first tapped holes in the nut cap and one of the through holes in the upper drum to securely fasten each of the heads onto the upper drum, and each of the second screw is fastened from top down through the one of the second tapped holes from the nut cap to precisely adjust the vertical position of each of the head chips.

REFERENCES:
patent: 4672489 (1987-06-01), Wada et al.
patent: 4709287 (1987-11-01), Yamashita
patent: 4768117 (1988-08-01), Mihara
patent: 4897745 (1990-01-01), Binder-Kriegelstein
patent: 5050024 (1991-09-01), Nanjyo
patent: 5317466 (1994-05-01), Hasegawa
patent: 5392180 (1995-02-01), Hasegawa

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