Patent US3213458A successfully refreshed from Google Patents.
US3213458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator with antenna-interaction suppressor
Assignee: Servo Corp of America
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Filing: 1959-12-22
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Granted: 1965-10-19
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Expires: 1979-12-22
Abstract
No abstract record available.
Inventors
- 👤 Paul G Hansel
- 👤 William H Paulstich
- 👤 Frederick G Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:05
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/38; G01S1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A VHF OMNINRANGE QUASI-DOPPLER NAVIGATION SYSTEM HAVING AN ARRAY OF ANTENNA ELEMENTS AND MEANS TO COUPLE A SIGNAL SOURCE SUCCESSIVELY TO EACH ANTENNA ELEMENT, SAID COUPLING MEANS COMPRISING AN INPUT TERMINAL, A REVOLVABLE MEMBER CONNECTED ELECTRICALLY TO SAID INPUT TERMINAL AND HAVING AN ELECTRICALLY CONDUCTIVE EXTENDED PORTION, A PLURALITY OF OUTPUT TERMINALS FOR CONNECTION TO RESPECTIVE ANTENNA ELEMENTS, MEANS CONNECTED RESPECTIVELY WITH EACH OF SAID OUTPUT TERMINALS TO COUPLE SAID SIGNAL SOURCE WITH EACH SUCCESSIVE ANTENNA AS SAID REVOLVABLE MEMBER IS REVOLVED, AND MEANS ADJACENT SAID ELECTRICALLY CONDUCTIVE PORTION AND MOVABLE WITH SAID REVOLVABLE MEMBER TO SUPPRESS INTERACTION OF SIGNALS BETWEEN ADJACENT ANTENNA ELEMENTS, SAID LATTER MENTIONED MEANS INCLUDING A TERMINATING IMPEDANCE CONNECTED TO GROUND AND COMPRISING A PREDETERMINED VALUE OF REACTANCE FOR DETUNING SAID SIGNALS AND A PREDETERMINED VALUE OF RESISTANCE FOR DAMPENING SAID SIGNALS.
Claim 2
Dependent Claim
137 words
IN A VHF OMNINRANGE QUASI-DOPPLER NAVIGATION SYSTEM HAVING AN ARRAY OF ANTENNA ELEMENTS AND MEANS TO COUPLE A SIGNAL SOURCE SUCCESSIVELY TO EACH ANTENNA ELEMENT, SAID COUPLING MEANS COMPRISING AN INPUT TERMINAL, A REVOLVABLE MEMBER CONNECTED ELECTRICALLY TO SAID INPUT TERMINAL AND HAVING AN ELECTRICALLY CONDUCTIVE EXTENDED PORTION, A PLURALITY OF OUTPUT TERMINALS FOR CONNECTION TO RESPECTIVE ANTENNA ELEMENTS, MEANS CONNECTED RESPECTIVELY WITH EACH OF SAID OUTPUT TERMINALS TO COUPLE SAID SIGNAL SOURCE WITH EACH SUCCESSIVE ANTENNA AS SAID REVOLVABLE MEMBER IS REVOLVED, AND MEANS ADJACENT SAID ELECTRICALLY CONDUCTIVE PORTION AND MOVABLE WITH SAID REVOLVABLE MEMBER TO SUPPRESS INTERACTION OF SIGNALS BETWEEN ADJACENT ANTENNA ELEMENTS, SAID LATTER MENTIONED MEANS INCLUDING A TERMINATING IMPEDANCE CONNECTED TO GROUND AND COMPRISING A PREDETERMINED VALUE OF REACTANCE FOR DETUNING SAID SIGNALS AND A PREDETERMINED VALUE OF RESISTANCE FOR DAMPENING SAID SIGNALS.
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |