US4894749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Option slot filler board
Assignee: Nokia Bell Labs
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Filing: 1987-08-31
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Granted: 1990-01-16
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Expires: 2007-08-31
Abstract
Abstract Option-equippable apparatus such as a computer that is not fully equipped with option circuit boards (14) has filler boards (15,16) connected to free board slots (13). In one embodiment, the filler boards (15) simulate the effect of circuit boards on airflow and act to evenly distribute the cooling air flow inside the computer cabinet (10) in order to provide improved cooling of the circuit boards. In another embodiment, the filler boards (16) block airflow between filler boards connected to adjacent board slots to direct more cooling airflow to any slots equipped with option circuit boards. The filler boards are made of electrically-conductive material (30) to absorb electromagnetic radiation emissions, and are covered with acoustically-absorbent material (33) to absorb sound emissions of the apparatus.
Inventors
- 👤 Gary W. Elko
- 👤 Paul Howard
- 👤 Daniel A. Quinlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20709; H05K7/20718; H05K7/20736; G; G06; G06F; G06F1/00; G06F1/16; G06F1/20; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
An arrangement for use with an electronic apparatus providing a plurality of slots, each slot for connection to the apparatus of an optional circuit package, the arrangement for connecting to a slot of the plurality of slots instead of the optional circuit package, the arrangement being a dummy optional circuit package having protrusions extending therefrom toward adjacent slots across a direction of coolant flow to block the flow of the coolant between two adjacent slots when the arrangement and an identical arrangement are connected one to each of the two adjacent slots.
Claim 2
Dependent Claim
92 words
An arrangement for use with an electronic apparatus providing a plurality of slots, each slot for connection to the apparatus of an optional circuit package, the arrangement for connecting to a slot of the plurality of slots instead of the optional circuit package, the arrangement being a dummy optional circuit package having protrusions extending therefrom toward adjacent slots across a direction of coolant flow to block the flow of the coolant between two adjacent slots when the arrangement and an identical arrangement are connected one to each of the two adjacent slots.
Claim 3
Dependent Claim
17 words
The arrangement of claim 1 comprising an electrically-conductive material for absorbing electromagnetic radiation emitted by the apparatus.
Claim 4
Dependent Claim
15 words
The arrangement of claim 1 comprising acoustically-adsorbent material for absorbing sound generated by the apparatus.
Claim 5
Dependent Claim
37 words
The arrangement of claim 1 comprising a plate of electrically-conductive material for absorbing electromagnetic radiation emitted by the apparatus; and acoustically-absorbent material covering at least one side of the plate for absorbing sound generated by the apparatus.
Claim 6
Dependent Claim
21 words
The arrangement of claim 4 wherein the plate defines openings therethrough to maximize exposure of surface area of the acoustically-absorbent material.
Claim 7
Dependent Claim
102 words
An arrangement comprising: an electronic apparatus having an enclosure providing a plurality of slots each for connection of an optional circuit package to the apparatus inside the enclosure; and at least one dummy entity each connected to a slot in place of the optional circuit package, and each dummy entity lacking circuitry of the optional circuit package and having protrusions extending therefrom toward adjacent slots across a direction of coolant flow to block the flow of the coolant through the enclosure between the adjacent slots when the entity and an identical entity are connected one to each of the two adjacent slots.
Claim 8
Dependent Claim
102 words
An arrangement comprising: an electronic apparatus having an enclosure providing a plurality of slots each for connection of an optional circuit package to the apparatus inside the enclosure; and at least one dummy entity each connected to a slot in place of the optional circuit package, and each dummy entity lacking circuitry of the optional circuit package and having protrusions extending therefrom toward adjacent slots across a direction of coolant flow to block the flow of the coolant through the enclosure between the adjacent slots when the entity and an identical entity are connected one to each of the two adjacent slots.
References Cited (Backward Citations)
US4186422A
Cited
US4399485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |