US3337749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-controlled signalling apparatus
Assignee: North American Aviation Corp
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Filing: 1964-03-30
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Granted: 1967-08-22
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Lee Curtis
- 👤 Philip A Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/002; H03G7/005; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052; H03G7/004; H03H; H03H7/00; H03H7/24; H03H7/25; H03H7/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A VOLTAGE CONTROLLED ATTENUATOR HAVING A TWO-TERMINAL INPUT AND TWO-TERMINAL OUTPUT AND ADAPTED TO BE INTERPOSED BETWEEN A SIGNAL-SOURCE-TO-BE-ATTENUATED AND SIGNAL UTILIZING MEANS, COMPRISING: A FIRST AND SECOND LIKE PLURALITY OF IMPEDANCES INTERCONNECTING SAID INPUT AND OUTPUT TERMINALS, RESPECTIVELY; A CORRESPONDING PLURALITY OF SERIES-CONNECTED PAIRS OF OPPOSITELY POLED DIODES, EACH PAIR CONNECTED CROSS A LIKE SUCCESSIVE INTERCONNECTION OF SAID IMPEDANCES OF SAID FIRST AND SECOND LIKE PLURALITY OF IMPEDANCES; A SOURCE OF CONTROL VOLTAGE; AND A CURRENT LIMITING RESISTOR INTERPOSED IN SERIES BETWEEN SAID SOURCE OF CONTROL VOLTAGE AND THE SERIES-CONNECTION BETWEEN THE DIODES OF A LAST PAIR OF SAID PAIRS, THE SERIES-CONNECTION BETWEEN THE REMAINING PAIRS OF OPPOSITELY POLED DIODES BEING COUPLED TO SAID SOURCE OF CONTROL VOLTAGE.
Claim 2
Dependent Claim
119 words
A VOLTAGE CONTROLLED ATTENUATOR HAVING A TWO-TERMINAL INPUT AND TWO-TERMINAL OUTPUT AND ADAPTED TO BE INTERPOSED BETWEEN A SIGNAL-SOURCE-TO-BE-ATTENUATED AND SIGNAL UTILIZING MEANS, COMPRISING: A FIRST AND SECOND LIKE PLURALITY OF IMPEDANCES INTERCONNECTING SAID INPUT AND OUTPUT TERMINALS, RESPECTIVELY; A CORRESPONDING PLURALITY OF SERIES-CONNECTED PAIRS OF OPPOSITELY POLED DIODES, EACH PAIR CONNECTED CROSS A LIKE SUCCESSIVE INTERCONNECTION OF SAID IMPEDANCES OF SAID FIRST AND SECOND LIKE PLURALITY OF IMPEDANCES; A SOURCE OF CONTROL VOLTAGE; AND A CURRENT LIMITING RESISTOR INTERPOSED IN SERIES BETWEEN SAID SOURCE OF CONTROL VOLTAGE AND THE SERIES-CONNECTION BETWEEN THE DIODES OF A LAST PAIR OF SAID PAIRS, THE SERIES-CONNECTION BETWEEN THE REMAINING PAIRS OF OPPOSITELY POLED DIODES BEING COUPLED TO SAID SOURCE OF CONTROL VOLTAGE.
References Cited (Backward Citations)
US2003428A
Cited
US2557888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |