US4454566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat removal from cabinets housing electronic equipment
Assignee: AT&T Inc
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Filing: 1981-11-27
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Granted: 1984-06-12
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Expires: 2001-11-27
Abstract
Abstract Heat generated from electronic equipment packed densely on a circuit board is transferred to conductive partition plates located adjacent to and on opposite sides of the circuit board. Heat is then transferred from the partition plates to conductive shelves located above and below the partition plates and then to a conductive rear wall of a cabinet. Heat is then transferred through the rear wall to a plurality of external fins and then to the atmosphere by radiation and convection. Alternatively, the circuit boards are housed in sealed enclosures. A clamp, fastened to the rear wall of the cabinet, is used for securing the sealed enclosure and for transferring the heat from the electronic equipment to the rear wall.
Inventors
- 👤 James C. Coyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:36
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K7/20545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
309 words
An apparatus comprising a cabinet enclosing heat generating, densely packed electrical circuit elements disposed on a plurality of circuit boards, each of said circuit boards having along one edge thereof a faceplate and along the opposite edge a plurality of connector pins, said cabinet comprising a thermally conductive rear wall having on an exterior side a plurality of heat dissipating fins, a plurality of thermally conductive parallel shelves fastened in parallel to the interior side of said rear wall, said shelves comprising a plurality of grooves extending the width of said shelves, at least one backplane member affixed in parallel to said rear wall between two adjacent shelves, said backplane member comprising a plurality of connectors, a plurality of thermally conductive partition plates disposed in alternate ones of said grooves between said two adjacent shelves and extending the width of said shelves from said backplane member to the front edges of said shelves and from the under surface of one of said adjacent shelves to the upper surface of the other of said adjacent shelves, said partition plates, said backplane member and said adjacent pair of shelves forming a plurality of interstitial spaces between said partition plates, each space comprising a groove in the upper surface and in the under surface of said adjacent pair of shelves which receives one of said circuit boards, one of said connectors on said backplane member mating with the connector pins of said inserted circuit board, the faceplate of said inserted circuit board forming an enclosed space, each circuit board being disposed between a pair of thermally conductive partition plates with the grooves that receive each circuit board being offset with respect to adjacent partition plate grooves so that each circuit board groove is closer to one partition plate groove immediately adjacent thereto than to the other partition plate groove immediately adjacent thereto.
Claim 2
Independent Claim
309 words
An apparatus comprising a cabinet enclosing heat generating, densely packed electrical circuit elements disposed on a plurality of circuit boards, each of said circuit boards having along one edge thereof a faceplate and along the opposite edge a plurality of connector pins, said cabinet comprising a thermally conductive rear wall having on an exterior side a plurality of heat dissipating fins, a plurality of thermally conductive parallel shelves fastened in parallel to the interior side of said rear wall, said shelves comprising a plurality of grooves extending the width of said shelves, at least one backplane member affixed in parallel to said rear wall between two adjacent shelves, said backplane member comprising a plurality of connectors, a plurality of thermally conductive partition plates disposed in alternate ones of said grooves between said two adjacent shelves and extending the width of said shelves from said backplane member to the front edges of said shelves and from the under surface of one of said adjacent shelves to the upper surface of the other of said adjacent shelves, said partition plates, said backplane member and said adjacent pair of shelves forming a plurality of interstitial spaces between said partition plates, each space comprising a groove in the upper surface and in the under surface of said adjacent pair of shelves which receives one of said circuit boards, one of said connectors on said backplane member mating with the connector pins of said inserted circuit board, the faceplate of said inserted circuit board forming an enclosed space, each circuit board being disposed between a pair of thermally conductive partition plates with the grooves that receive each circuit board being offset with respect to adjacent partition plate grooves so that each circuit board groove is closer to one partition plate groove immediately adjacent thereto than to the other partition plate groove immediately adjacent thereto.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |