Support shelf for printed circuit boards

Supports: racks – Special article – Platelike

Patent

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Details

361415, H05K 718

Patent

active

043534694

ABSTRACT:
A support shelf (12) having high strength and of unitary sheet metal construction, for supporting a plurality of closely-spaced printed circuit boards (28 and 29) and aligning the boards with respect to closely-spaced upper and lower connector plugs (24 and 26) of a backplane assembly (22) includes spaced front and rear support sections (40 and 42) and spaced front and rear guide sections (60 and 66). Upper guide channels (44) formed in the front and rear support sections (40 and 42) for receiving lower edges (46) of the printed circuit boards (28) supported on the shelf (12), and lower guide channels (62) formed in the front and rear guide sections (60 and 66) for receiving upper edges (30) of the printed circuit boards (29) supported on a lower shelf 14, have smooth board engaging surfaces (79 and 86) and flared end sections (78 and 84), to facilitate insertion and retraction of the boards (28 and 29) into and out of the connector plugs (24 and 26) of the backplane assembly (22) without scratching or marring the surface of the boards. The spacing between the front and rear support sections (40 and 42) and the front and rear guide sections (60 and 66) create a "chimney effect" when the shelves (12) are mounted in a transmission bay to facilitate air circulation between and cooling of the closely-spaced printed circuit boards (28 and 29).

REFERENCES:
patent: 3015755 (1962-01-01), Wright et al.
patent: 3349924 (1967-10-01), Maurer et al.
patent: 3377515 (1968-04-01), Erb
patent: 3382476 (1968-05-01), Novet
patent: 3458767 (1969-07-01), Hedger et al.
patent: 3731157 (1973-05-01), Reimer
patent: 3733523 (1973-05-01), Reynolds et al.
patent: 3762574 (1973-10-01), Bentley et al.
patent: 4184599 (1980-01-01), Drake et al.
RCA Technical Notes, "Printed Circuit Board Guide Assembly", Sep. 17, 1973.

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