US3373367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier failure indicator
Assignee: Nortel Networks Ltd
•
Filing: 1965-03-01
•
Granted: 1968-03-12
•
Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wallace E Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/42; B64G1/428; H; H03; H03F; H03F1/00; H03F1/52; H03F1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN AN AMPLIFIER SYSTEM HAVING TWO AMPLIFIERS EACH WITH A PAIR OF OUTPUT TERMINALS, A CORRESPONDING OUTPUT TERMINAL OF EACH AMPLIFIER BEING CONNECTED TO OPPOSITE ENDS OF A FIRST CENTER-TAPPED COIL, AND A SUBSTANTIALLY RESISTIVE LOAD CONNECTED BETWEEN THE CENTER-TAP OF SAID FIRST COIL AND A COMMON CONNECTION TO THE OTHER OUTPUT TERMINAL OF EACH AMPLIFIER, INDICATING APPARATUS FOR INDICATING INDIVIDUAL FAILURE OF ONE OF THE AMPLIFIERS COMPRISING, A SECOND COIL, HAVING A FIRST AND A SECOND END AND A CENTER-TAP, MAGNETICALLY COUPLED TO SAID FIRST COIL, SAID CENTER-TAP OF SAID SECOND COIL BEING CONNECTED TO SAID COMMON CONNECTION, THE NUMBER OF TURNS OF SAID SECOND COIL BEING SUBSTANTIALLY EQUAL TO THE NUMBER OF TURNS OF SAID FIRST COIL, A FIRST INDICATING DEVICE CONNECTED BETWEEN SAID FIRST END OF SAID SECOND COIL AND SAID CENTER-TAP OF SAID FIRST COIL, AND A SECOND INDICATING DEVICE CONNECTED BETWEEN SAID SECOND END OF SAID SECOND COIL AND SAID CENTER-TAP OF SAID FIRST COIL.
Claim 2
Dependent Claim
160 words
IN AN AMPLIFIER SYSTEM HAVING TWO AMPLIFIERS EACH WITH A PAIR OF OUTPUT TERMINALS, A CORRESPONDING OUTPUT TERMINAL OF EACH AMPLIFIER BEING CONNECTED TO OPPOSITE ENDS OF A FIRST CENTER-TAPPED COIL, AND A SUBSTANTIALLY RESISTIVE LOAD CONNECTED BETWEEN THE CENTER-TAP OF SAID FIRST COIL AND A COMMON CONNECTION TO THE OTHER OUTPUT TERMINAL OF EACH AMPLIFIER, INDICATING APPARATUS FOR INDICATING INDIVIDUAL FAILURE OF ONE OF THE AMPLIFIERS COMPRISING, A SECOND COIL, HAVING A FIRST AND A SECOND END AND A CENTER-TAP, MAGNETICALLY COUPLED TO SAID FIRST COIL, SAID CENTER-TAP OF SAID SECOND COIL BEING CONNECTED TO SAID COMMON CONNECTION, THE NUMBER OF TURNS OF SAID SECOND COIL BEING SUBSTANTIALLY EQUAL TO THE NUMBER OF TURNS OF SAID FIRST COIL, A FIRST INDICATING DEVICE CONNECTED BETWEEN SAID FIRST END OF SAID SECOND COIL AND SAID CENTER-TAP OF SAID FIRST COIL, AND A SECOND INDICATING DEVICE CONNECTED BETWEEN SAID SECOND END OF SAID SECOND COIL AND SAID CENTER-TAP OF SAID FIRST COIL.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |