US5684441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse power protection circuit and relay
Assignee: Agilent Technologies Inc
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Filing: 1996-02-29
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Granted: 1997-11-04
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Expires: 2016-02-29
Abstract
Abstract A relay for high frequency instruments and a reverse power protection circuit for high frequency instruments are described herein. The relay is inexpensive to construct, permits good impedance matching up to approximately 5 GHz, and can be easily mounted on a coplanar waveguide transmission line. The circuit can open the relay in response to a reverse power condition in as little as 8 microseconds and provides both good grounding and functions reliably up to 4 GHz.
Inventors
- 👤 Roger R. Graeber
- 👤 Grant D. Marr
- 👤 Darrell H. Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:56
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; H01; H01H; H01H51/00; H01H51/28; H02; H02H; H02H3/00; H02H3/003; H05K9/0066
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A relay for high frequency instruments, the relay comprising: a cylindrical glass reed switch with switch leads; an elastomeric conductive tube surrounding the glass reed switch; a conductive metal grounding shield, the shield surrounding the elastomeric tube and further having a lengthwise slot and two extended grounding contacts at both ends of the shield, the grounding contacts being coplanar with the switch leads; electro-magnetic coil assembly with central axial opening, the combination of the switch, tube, and shield being inserted through the axial opening and extending beyond both ends of the coil assembly; and outer housing, the coil and combination of the switch, tube, and shield being inserted into the housing and fixed therein by a potting material, the grounding contacts and switch leads extending from the housing.
Claim 2
Dependent Claim
128 words
A relay for high frequency instruments, the relay comprising: a cylindrical glass reed switch with switch leads; an elastomeric conductive tube surrounding the glass reed switch; a conductive metal grounding shield, the shield surrounding the elastomeric tube and further having a lengthwise slot and two extended grounding contacts at both ends of the shield, the grounding contacts being coplanar with the switch leads; electro-magnetic coil assembly with central axial opening, the combination of the switch, tube, and shield being inserted through the axial opening and extending beyond both ends of the coil assembly; and outer housing, the coil and combination of the switch, tube, and shield being inserted into the housing and fixed therein by a potting material, the grounding contacts and switch leads extending from the housing.
Claim 3
Dependent Claim
24 words
The relay of claim 1 wherein the grounding contacts are coupled directly to the ground planes of a coplanar transmission waveguide without intermediated vias.
Claim 4
Dependent Claim
119 words
A relay for high frequency instruments, the relay comprising: a cylindrical glass reed switch with switch leads; an elastomeric conductive tube surrounding the glass reed switch; a conductive metal grounding shield, the shield surrounding the elastomeric tube and having a lengthwise axial slot and two extended grounding contacts at both ends of the shield; electro-magnetic coil assembly with central axial opening, the combination of the switch, tube, and shield being inserted through the axial opening and extending beyond both ends of the coil assembly; and outer housing, the coil and combination of the switch, tube, and shield being inserted into the housing and fixed therein by a potting material, the grounding contacts and switch leads extending from the housing.
Claim 5
Dependent Claim
119 words
A relay for high frequency instruments, the relay comprising: a cylindrical glass reed switch with switch leads; an elastomeric conductive tube surrounding the glass reed switch; a conductive metal grounding shield, the shield surrounding the elastomeric tube and having a lengthwise axial slot and two extended grounding contacts at both ends of the shield; electro-magnetic coil assembly with central axial opening, the combination of the switch, tube, and shield being inserted through the axial opening and extending beyond both ends of the coil assembly; and outer housing, the coil and combination of the switch, tube, and shield being inserted into the housing and fixed therein by a potting material, the grounding contacts and switch leads extending from the housing.
Claim 6
Dependent Claim
30 words
The relay of claim 3 wherein the grounding contacts are coplanar with the switch leads and coupled directly to the ground planes of a coplanar transmission waveguide without intermediated vias.
References Cited (Backward Citations)
US4286241A
Cited
US5258731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |