Subrack for telecommunication equipment

Details Subrack for telecommunication equipment Subrack for telecommunication equipment

1990-09-27

1992-04-28

Gibson, Jr., Robert W.

Supports: racks

Special article

Platelike

211 26, 211189, A47F 500

Patent

active

051079933

ABSTRACT:
A subrack for supporting cards and printed circuit boards (PSC) for telecommunication equipment which allows complete use of the space available for these cards and circuit boards, while meeting the DIN 41494-IEC 297 standard, with a pitch at least 4 times lower than the pitch required by this standard. The subrack includes undrilled crosspieces, provided only with grooves, one of which is associated with a positioning toothing with teeth forming a rack, having a pitch equal to half of the pitch of drillings of conventional crosspieces. The teeth are inserted into seats machined into the guide of the printed circuit board, each seat being offset by a quarter of the pitch required by the standard. Therefore, by successive turning the boardguide by 180.degree., a series of real pitches is obtained which is a quarter of the minimum pitch required by the standard.

REFERENCES:
patent: 4407416 (1983-10-01), Anderson
patent: 4505392 (1985-03-01), Erlam
patent: 4508228 (1985-04-01), Erlam
patent: 4531640 (1985-07-01), Shah
patent: 4690286 (1987-09-01), Horne et al.

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