Patent US3073164A successfully refreshed from Google Patents.
US3073164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple measuring circuit
Assignee: Varian Medical Systems Inc
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Filing: 1960-02-29
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Granted: 1963-01-15
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Rorden
- 👤 Allen A Ginsling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A POTENTIOMETER BALANCING CIRCUIT, THE COMBINATION COMPRISING: MEANS FOR DEVELOPING AN INPUT INDICATING VOLTAGE; A BALANCING POTENTIOMETER INCLUDING A MOVEABLE ARM FOR PICKING OFF A MEASURING VOLTAGE; AN ATTENUATOR FOR DIVIDING SAID MEASURING VOLTAGE COMPRISING FIRST, SECOND AND THIRD RESISTANCES IN SERIES, SAID SECOND RESISTANCE BEING OF A VALUE WHICH RENDERS THE RANGE OF THE FRACTION OF THE MEASURING VOLTAGE APPEARING ACROSS SAID SECOND AND THIRD RESISTANCES EQUAL TO THE RANGE OF SAID INPUT VOLTAGE; MEANS FOR COMPARING SAID INPUT VOLTAGE AND SAID FRACTIONAL MEASURING VOLTAGE; AND MEANS FOR DETECTING THE VOLTAGE ACROSS SAID THIRD RESISTANCE AS A SIGNAL INDICATING THE UNBALANCE BETWEEN SAID COMPARED VOLTAGES, SAID FIRST RESISTANCE BEING LARGE IN COMPARISON TO THE SUM OF SAID FIRST AND SECOND RESISTANCES SO THAT SAID FIRST RESISTANCE DETERMINES THE POTENTIMETER ARM CURRENT THROUGH SAID ATTENUATOR AND THE MAXIMUM UNBALANCE VOLTAGE ACROSS SAID THIRD RESISTANCE IS SUBSTANTIALLY INDEPENDENT OF THE VALUE OF SAID SECOND RESISTANCE.
Claim 2
Dependent Claim
155 words
IN A POTENTIOMETER BALANCING CIRCUIT, THE COMBINATION COMPRISING: MEANS FOR DEVELOPING AN INPUT INDICATING VOLTAGE; A BALANCING POTENTIOMETER INCLUDING A MOVEABLE ARM FOR PICKING OFF A MEASURING VOLTAGE; AN ATTENUATOR FOR DIVIDING SAID MEASURING VOLTAGE COMPRISING FIRST, SECOND AND THIRD RESISTANCES IN SERIES, SAID SECOND RESISTANCE BEING OF A VALUE WHICH RENDERS THE RANGE OF THE FRACTION OF THE MEASURING VOLTAGE APPEARING ACROSS SAID SECOND AND THIRD RESISTANCES EQUAL TO THE RANGE OF SAID INPUT VOLTAGE; MEANS FOR COMPARING SAID INPUT VOLTAGE AND SAID FRACTIONAL MEASURING VOLTAGE; AND MEANS FOR DETECTING THE VOLTAGE ACROSS SAID THIRD RESISTANCE AS A SIGNAL INDICATING THE UNBALANCE BETWEEN SAID COMPARED VOLTAGES, SAID FIRST RESISTANCE BEING LARGE IN COMPARISON TO THE SUM OF SAID FIRST AND SECOND RESISTANCES SO THAT SAID FIRST RESISTANCE DETERMINES THE POTENTIMETER ARM CURRENT THROUGH SAID ATTENUATOR AND THE MAXIMUM UNBALANCE VOLTAGE ACROSS SAID THIRD RESISTANCE IS SUBSTANTIALLY INDEPENDENT OF THE VALUE OF SAID SECOND RESISTANCE.
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |