US3206597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid analyzer and transducer circuit therefor
Assignee: MSA Safety Inc
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Filing: 1962-09-27
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Granted: 1965-09-14
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Fertig Glenn Howard
- 👤 Adrian C Billetdeaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:08
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN OSICILLATION GENERATOR COMPRISING OSCILLATORY AMPLIFIER MEANS HAVING AT LEAST AN ANODE, A CATHODE AND A GRID, A FIRST RESONANT CIRCUIT CONNECTED TO SAID GRID, A SECOND RESONANT CIRCUIT CONNECTED TO SAID ANODE AND HAVING ONLY POSITIVE CAPACITIVE COUPLING WITH SAID FIRST RESONANT CIRCUIT, SAID RESONANT CIRCUITS BEING RELATIVELY DETUNED, A RESISTANCE CONNECTING SAID CATHODE TO A POINT OF COMMON REFERENCE POTENTIAL, TO GROUND, A CAPACITANCE CONNECTED IN PARALLEL WITH SAID RESISTANCE, A SIGNAL-RESPONSIVE REACTIVE ELEMENT INCLUDED IN SAID SECOND RESONANT CIRCUIT FOR SENSING A DESIRED SIGNAL AND FOR VARYING THE FREQUENCY THEREOF AND THE VOLTAGE AT THE ANODE, WHEREBY GREATER SENSITIVITY IN THE OUTPUT VOLTAGE AT THE ANODE IS OBTAINED RELATIVE TO SIGNALS RECEIVED BY SAID SIGNAL-RESPONSIVE REACTIVE ELEMENT THAN WHEN SAID ELEMENT IS CONNECTED IN SAID FIRST RESONANT CIRCUIT.
Claim 2
Dependent Claim
131 words
AN OSICILLATION GENERATOR COMPRISING OSCILLATORY AMPLIFIER MEANS HAVING AT LEAST AN ANODE, A CATHODE AND A GRID, A FIRST RESONANT CIRCUIT CONNECTED TO SAID GRID, A SECOND RESONANT CIRCUIT CONNECTED TO SAID ANODE AND HAVING ONLY POSITIVE CAPACITIVE COUPLING WITH SAID FIRST RESONANT CIRCUIT, SAID RESONANT CIRCUITS BEING RELATIVELY DETUNED, A RESISTANCE CONNECTING SAID CATHODE TO A POINT OF COMMON REFERENCE POTENTIAL, TO GROUND, A CAPACITANCE CONNECTED IN PARALLEL WITH SAID RESISTANCE, A SIGNAL-RESPONSIVE REACTIVE ELEMENT INCLUDED IN SAID SECOND RESONANT CIRCUIT FOR SENSING A DESIRED SIGNAL AND FOR VARYING THE FREQUENCY THEREOF AND THE VOLTAGE AT THE ANODE, WHEREBY GREATER SENSITIVITY IN THE OUTPUT VOLTAGE AT THE ANODE IS OBTAINED RELATIVE TO SIGNALS RECEIVED BY SAID SIGNAL-RESPONSIVE REACTIVE ELEMENT THAN WHEN SAID ELEMENT IS CONNECTED IN SAID FIRST RESONANT CIRCUIT.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |