Patent US4894753A successfully refreshed from Google Patents.
US4894753A
Expired / Lapsed
US
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Electrical circuitry support apparatus
Assignee: Teradyne Inc
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Filing: 1988-09-09
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Granted: 1990-01-16
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Expires: 2008-09-09
Abstract
Abstract Electrical circuitry support apparatus including a card cage having slots for removably receiving circuit boards, and a plurality of circuit boards in the slots, at least one circuit board being a high-frequency board carrying an enclosure containing a high-frequency device. The enclosure provides shielding inhibiting transmission of high-frequency signals to or from the device.
Inventors
- 👤 Brian C. Wadell
- 👤 Bernard M. Cuddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:55
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0062; H05K7/00; H05K7/14; H05K7/1422; H05K7/1424; H05K7/1425; Y; Y10; Y10S; Y10S174/00; Y10S174/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
136 words
Electrical circuitry support apparatus comprising a card cage having two sets of facing slots for removably receiving circuit boards in a region between said two sets of slots, said card cage employing a ground bar extending along an opening to said region, and a plurality of circuit boards in said slots, each board being received in one slot of one set and one slot of the other set, at least one circuit board being a high-frequency board assembly including a shielded enclosure on a first side of said high frequency board assembly, said high-frequency board assembly containing a high-frequency device, the enclosure providing shielding inhibiting transmission of high-frequency signals from or to said device, said high-frequency board assembly having an ear that extends from said high-frequency board assembly and is electrically connected to said ground bar.
Claim 2
Dependent Claim
136 words
Electrical circuitry support apparatus comprising a card cage having two sets of facing slots for removably receiving circuit boards in a region between said two sets of slots, said card cage employing a ground bar extending along an opening to said region, and a plurality of circuit boards in said slots, each board being received in one slot of one set and one slot of the other set, at least one circuit board being a high-frequency board assembly including a shielded enclosure on a first side of said high frequency board assembly, said high-frequency board assembly containing a high-frequency device, the enclosure providing shielding inhibiting transmission of high-frequency signals from or to said device, said high-frequency board assembly having an ear that extends from said high-frequency board assembly and is electrically connected to said ground bar.
Claim 3
Dependent Claim
57 words
The apparatus of claim 1 wherein at least one said circuit board is a nonhigh-frequency circuit board, and wherein said high-frequency board assembly is spaced on said first side from an adjacent board by at least two slots, and wherein said at least one nonhigh-frequency circuit board has sufficiently low profile to be located in adjacent slots.
Claim 4
Dependent Claim
41 words
The apparatus of claim 1 wherein said high-frequency board assembly includes a metal support member including a flat portion on which said shielded enclosure is mounted on said high-frequency board assembly, said ear being an integral part of said support member.
Claim 5
Dependent Claim
23 words
The apparatus of claim 3 wherein said support member further comprises right-angle legs that extend along two sides of the high-frequency board assembly.
Claim 6
Dependent Claim
52 words
The apparatus of claim 1 wherein said enclosure is mounted on a portion of said high-frequency board assembly near said ground bar when said high frequency board assembly is received in said facing slots, and said high frequency board assembly also contains nonhigh-frequency components on other portions of said high-frequency board assembly.
Claim 7
Dependent Claim
37 words
The apparatus of claim 5 wherein said card cage further comprises a backplane on the other side of said circuit boards from said ground bar, and connectors making electrical connection between the circuit boards and the backplane.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein said ground bar contains captive floating nut connectors for securing said ear to said ground bar.
Claim 9
Dependent Claim
20 words
The apparatus of claim 1 wherein said card cage includes parallel, spaced guide plates having transverse portions defining said slots.
Claim 10
Dependent Claim
19 words
The apparatus of claim 8 wherein said transverse portions are provided by punched-out, bent portions of said guide plates.
Claim 11
Dependent Claim
34 words
The apparatus of claim 8 wherein said card cage has side plates, and said guide plates have tabs that extend through holes in said side plates in order to accurately align said guide plates.
Claim 12
Dependent Claim
17 words
The apparatus of claim 10 wherein said card cage includes stiffening bars adjacent to said guide plates.
Claim 13
Dependent Claim
20 words
The apparatus of claim 1 wherein said card cage further comprises a mounting plate for vibration sensitive or oversize components.
Claim 14
Dependent Claim
35 words
The apparatus of claim 12 wherein said card cage further comprises a backplane located between said mounting plate and said region, and wherein said mounting plate is movably mounted to provide access to said backplane.
Claim 15
Dependent Claim
22 words
The apparatus of claim 1 wherein said circuit boards carry electrical components providing automatic test circuitry including high-frequency source and measurement instruments.
Claim 16
Dependent Claim
24 words
The apparatus of claim 3 wherein said support member further comprises a bracket on said flat portion for radio frequency connectors for nonhigh-frequency devices.
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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) | 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 |