US3217232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated power supply
Assignee: AT&T Inc
•
Filing: 1961-10-30
•
Granted: 1965-11-09
•
Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Billy H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569; G05F1/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A VOLTAGE REGULATED POWER SUPPLY WHICH COMPRISES, IN COMBINATING, A SOURCE OF A UNIDIRECTIONAL POTENTIAL, A TRANSISTOR HAVING A BASE ELECTRODE AND A COLLECTOR-EMITTER PATH, A LOAD, CIRCUIT MEANS CONNECTING SAID LOAD AND SAID COLLECTOR-EMITTER PATH IN SERIES ACROSS SAID SOURCE, MEANS FOR GENERATING A CONTROL VOLTAGE WHOSE MAGNITUDE VARIES IN PROPORTION TO CHANGES IN THE MAGNITUDE OF CURRENT FLOWING THROUGH SAID LOAD WHENEVER THE IMPEDANCE OF SAID LOAD IS ALTERED, A FIXED RESISTANCE AND A VARIABLE IMPEDANCE ELEMENT CONNECTED IN SERIES TO FORM A VOLTAGE DIVIDER, CIRCUIT MEANS FOR APPLYING SAID CONTROL VOLTAGE ACROSS SAID VOLTAGE DIVIDER, CIRCUIT MEANS CONNECTING SAID BASE ELECTRODE OF SAID TRANSISTOR TO THE JUNCTURE OF SAID FIXED RE-
Claim 2
Dependent Claim
114 words
A VOLTAGE REGULATED POWER SUPPLY WHICH COMPRISES, IN COMBINATING, A SOURCE OF A UNIDIRECTIONAL POTENTIAL, A TRANSISTOR HAVING A BASE ELECTRODE AND A COLLECTOR-EMITTER PATH, A LOAD, CIRCUIT MEANS CONNECTING SAID LOAD AND SAID COLLECTOR-EMITTER PATH IN SERIES ACROSS SAID SOURCE, MEANS FOR GENERATING A CONTROL VOLTAGE WHOSE MAGNITUDE VARIES IN PROPORTION TO CHANGES IN THE MAGNITUDE OF CURRENT FLOWING THROUGH SAID LOAD WHENEVER THE IMPEDANCE OF SAID LOAD IS ALTERED, A FIXED RESISTANCE AND A VARIABLE IMPEDANCE ELEMENT CONNECTED IN SERIES TO FORM A VOLTAGE DIVIDER, CIRCUIT MEANS FOR APPLYING SAID CONTROL VOLTAGE ACROSS SAID VOLTAGE DIVIDER, CIRCUIT MEANS CONNECTING SAID BASE ELECTRODE OF SAID TRANSISTOR TO THE JUNCTURE OF SAID FIXED RE-
References Cited (Backward Citations)
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Cited
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |