Patent US5467485A successfully refreshed from Google Patents.
US3239774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor power supply which minimizes distortion
Assignee: Blonder Tongue Electronics
•
Filing: 1961-06-20
•
Granted: 1966-03-08
•
Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Tongue Ben Hapgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:40
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A TRANSISTOR RELAY HAVING BASE, COLLECTOR AND EMITTER ELECTRODES, A SOURCE OF DIRECT-CURRENT POWER HAVING AT LEAST TWO TERMINALS, ONE OF WHICH IS CONNECTED TO THE COLLECTOR AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO ONE OF THE OTHER ELECTRODES, THE RELAY HAVING A PREDETERMINED MAXIMUM ALLOWABLE COLLECTOR POWER DISSIPATION AND A PREDETERMINED VOLTAGE TO BE DEVELOPED BETWEEN THE COLLECTOR AND THE SAID ONE OF THE OTHER ELECTRODES, A FURTHER SOURCE OF DIRECT-CURRENT VOLTAGE CONNECTED BETWEEN THE BASE AND EMITTER ELECTRODES, SAID RELAY HAVING THE FOLLOWING CRITICAL CONDITIONS: (1) THE FIRST-MENTIONED SOURCE HAVING A MAXIMUM AVAILABLE POWER SUBSTANTIALLY EQUAL TO THE SAID PREDETERMINED POWER DISSIPATION, (2) THE FIRST MENTIONED SOURCE, WHEN OPEN-CIRCUITED, HAVING A DIRECT-CURRENT VOLTAGE VALUE SUBSTANTIALLY EQUAL TO TWICE THE SAID PREDETERMINED VOLTAGE, (3) THE FURTHER SOURCE HAVING A DIRECT-CURRENT VOLTAGE VALUE VERY SMALL COMPARED WITH THE SAID PREDETERMINED VOLTAGE, AND SINGLE CONTROL MEANS FOR VARYING THE VALUE OF THE VOLTAGE OF THE FURTHER SOURCE, AND AS THE RESULT OF THE CONCURRENCE OF SAID CONDITIONS, FOR SUBSTANTIALLY MINIMIZING DISTORTION WHILE MAINTAINING THE COLLECTOR POWER DISSIPATION SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
180 words
A TRANSISTOR RELAY HAVING BASE, COLLECTOR AND EMITTER ELECTRODES, A SOURCE OF DIRECT-CURRENT POWER HAVING AT LEAST TWO TERMINALS, ONE OF WHICH IS CONNECTED TO THE COLLECTOR AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO ONE OF THE OTHER ELECTRODES, THE RELAY HAVING A PREDETERMINED MAXIMUM ALLOWABLE COLLECTOR POWER DISSIPATION AND A PREDETERMINED VOLTAGE TO BE DEVELOPED BETWEEN THE COLLECTOR AND THE SAID ONE OF THE OTHER ELECTRODES, A FURTHER SOURCE OF DIRECT-CURRENT VOLTAGE CONNECTED BETWEEN THE BASE AND EMITTER ELECTRODES, SAID RELAY HAVING THE FOLLOWING CRITICAL CONDITIONS: (1) THE FIRST-MENTIONED SOURCE HAVING A MAXIMUM AVAILABLE POWER SUBSTANTIALLY EQUAL TO THE SAID PREDETERMINED POWER DISSIPATION, (2) THE FIRST MENTIONED SOURCE, WHEN OPEN-CIRCUITED, HAVING A DIRECT-CURRENT VOLTAGE VALUE SUBSTANTIALLY EQUAL TO TWICE THE SAID PREDETERMINED VOLTAGE, (3) THE FURTHER SOURCE HAVING A DIRECT-CURRENT VOLTAGE VALUE VERY SMALL COMPARED WITH THE SAID PREDETERMINED VOLTAGE, AND SINGLE CONTROL MEANS FOR VARYING THE VALUE OF THE VOLTAGE OF THE FURTHER SOURCE, AND AS THE RESULT OF THE CONCURRENCE OF SAID CONDITIONS, FOR SUBSTANTIALLY MINIMIZING DISTORTION WHILE MAINTAINING THE COLLECTOR POWER DISSIPATION SUBSTANTIALLY CONSTANT.
References Cited (Backward Citations)
BE543201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |