US3320590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching system for selectively connecting plural signal sources to output channels
Assignee: North American Aviation Corp
•
Filing: 1963-09-12
•
Granted: 1967-05-16
•
Expires: 1983-09-12
Abstract
No abstract record available.
Inventors
- 👤 Rovell Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:52
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6257; H03K17/6221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN COMBINATION A PLURALITY OF SIGNAL SOURCES, EACH CONNECTED IN SERIES BETWEEN TWO TERMINALS, FIRST AND SECOND OUTPUT CHANNELS, EACH HAVING A SEPARATE INPUT TERMINAL, A FIRST PLURALITY OF IMPEDANCE ELEMENTS, ONE FOR EACH SOURCE, COUPLING ONE TERMINAL OF EACH OF SAID SOURCES TO THE INPUT TERMINAL OF SAID FIRST OUTPUT CHANNEL, A SECOND PLURALITY OF IMPEDANCE ELEMENTS, ONE FOR EACH SOURCE, COUPLING THE OTHER TERMINAL OF EACH OF SAID SOURCES TO THE INPUT TERMINAL OF SAID SECOND OUTPUT CHANNEL, A FIRST PLURALITY OF SWITCHES, ONE COUPLED TO SAID ONE TERMINAL OF EACH OF SAID SIGNAL SOURCES, FOR SHUNTING TO A SOURCE OF REFERENCE POTENTIAL ALL SIGNALS TO SAID FIRST OUTPUT CHANNEL EXCEPT FROM A SELECTED SIGNAL SOURCE, AND
Claim 2
Dependent Claim
119 words
IN COMBINATION A PLURALITY OF SIGNAL SOURCES, EACH CONNECTED IN SERIES BETWEEN TWO TERMINALS, FIRST AND SECOND OUTPUT CHANNELS, EACH HAVING A SEPARATE INPUT TERMINAL, A FIRST PLURALITY OF IMPEDANCE ELEMENTS, ONE FOR EACH SOURCE, COUPLING ONE TERMINAL OF EACH OF SAID SOURCES TO THE INPUT TERMINAL OF SAID FIRST OUTPUT CHANNEL, A SECOND PLURALITY OF IMPEDANCE ELEMENTS, ONE FOR EACH SOURCE, COUPLING THE OTHER TERMINAL OF EACH OF SAID SOURCES TO THE INPUT TERMINAL OF SAID SECOND OUTPUT CHANNEL, A FIRST PLURALITY OF SWITCHES, ONE COUPLED TO SAID ONE TERMINAL OF EACH OF SAID SIGNAL SOURCES, FOR SHUNTING TO A SOURCE OF REFERENCE POTENTIAL ALL SIGNALS TO SAID FIRST OUTPUT CHANNEL EXCEPT FROM A SELECTED SIGNAL SOURCE, AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |