US3262055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
True r.m.s. voltmeter having time-shared stabilizing feedback circuits utilizing a thermocouple input and photoelectric modulator-demodulator amplifier
Assignee: HP Inc
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Filing: 1962-08-20
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Granted: 1966-07-19
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Justice Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:11
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/22; G01R19/225; G01R17/00; G01R17/10; G01R17/16; H; H03; H03F; H03F2200/00; H03F2200/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ELECTRONIC VOLTMETER COMPRISING FIRST AND SECOND ELEMENTS, EACH HAVING A HEATER AND EACH PRODUCING A VOLTAGE RELATED TO THE TEMPERATURE THEREOF, A FIRST PAIR OF SWITCHING ELEMENTS ADAPTED TO BE ALTERNATELY CONDUCTIVE AND NON-CONDUCTIVE, A SECOND PAIR OF SWITCHING ELEMENTS ADAPTED TO BE ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE IN OPPOSITE PHASE RELATION TO SAID FIRST PAIR OF SWITCHING ELEMENTS, AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT, ONE SWITCHING ELEMENT IN EACH OF SAID PAIRS BEING CONNECTED TO SAID INPUT, THE OTHER SWITCHING ELEMENT IN EACH OF SAID PAIRS BEING CONNECTED TO SAID OUTPUT, MEANS INCLUDING THE FIRST PAIR OF SWITCHING ELEMENTS AND FORMING A FIRST FEEDBACK PATH BETWEEN THE INPUT AND OUTPUT OF SAID AMPLIFIER, MEANS INCLUDING SAID SECOND PAIR OF SWITCHING ELEMENTS AND SAID FIRST AND SECOND ELEMENTS SERIALLY CONNECTED IN POLARITY OPPOSITION AND FORMING A
Claim 2
Dependent Claim
138 words
AN ELECTRONIC VOLTMETER COMPRISING FIRST AND SECOND ELEMENTS, EACH HAVING A HEATER AND EACH PRODUCING A VOLTAGE RELATED TO THE TEMPERATURE THEREOF, A FIRST PAIR OF SWITCHING ELEMENTS ADAPTED TO BE ALTERNATELY CONDUCTIVE AND NON-CONDUCTIVE, A SECOND PAIR OF SWITCHING ELEMENTS ADAPTED TO BE ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE IN OPPOSITE PHASE RELATION TO SAID FIRST PAIR OF SWITCHING ELEMENTS, AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT, ONE SWITCHING ELEMENT IN EACH OF SAID PAIRS BEING CONNECTED TO SAID INPUT, THE OTHER SWITCHING ELEMENT IN EACH OF SAID PAIRS BEING CONNECTED TO SAID OUTPUT, MEANS INCLUDING THE FIRST PAIR OF SWITCHING ELEMENTS AND FORMING A FIRST FEEDBACK PATH BETWEEN THE INPUT AND OUTPUT OF SAID AMPLIFIER, MEANS INCLUDING SAID SECOND PAIR OF SWITCHING ELEMENTS AND SAID FIRST AND SECOND ELEMENTS SERIALLY CONNECTED IN POLARITY OPPOSITION AND FORMING A
References Cited (Backward Citations)
US2857569A
Cited
US3093732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |