Patent US3227947A successfully refreshed from Google Patents.
US3227947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization vacuum meter with switching means for linear and logarithmic responses
Assignee: Individual
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Filing: 1964-11-24
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Granted: 1966-01-04
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Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Muller Klaus Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:22
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN AN IONIZATION VACUUM METER FOR MEASURING PRESSURE CHANGES OF A VACUUM IN A VESSEL, THE METER COMPRISING A MEASURING HEAD CONNECTED TO THE VESSEL AND HAVING AN ELECTRON SOURCE, AN ANODE AND AN ION COLLECTOR, AND AN ELECTRICAL POWER SUPPLY CONNECTED TO THE MEASURING HEAD FOR CONTROLLING THE ELECTRON CURRENT AND THE POTENTIAL DISTRIBUTION IN THE MEASURING HEAD, THE ION COLLECTOR BEING CONNECTED WITH AN ELECTRICAL AMPLIFYING DEVICE GIVING AN INDICATION AND REGISTRATION OF THE PRESSURE PREVAILING IN THE VESSEL; THE IMPROVEMENT COMPRISING AN ELECTRICAL CIRCUIT INCLUDING A SWITCHING MEANS, AND SAID DEVICE, THE DEVICE COMPRISING TWO AMPLIFIERS, THE FIRST ONE OF WHICH HAS A LINEAR RESPONSE AND INDICATION TO THE ION CURRENT, THE SECOND ONE OF WHCIH HAS A LOGARITHMIC RESPONSE, AND THE SWITHCING MEANS BEING CAPABLE OF SELECTIVELY SWITCHING FROM THE LINEAR AMPLIFIER TO THE LOGARITHMIC AMPLIFIER, THEREBY GIVING A LINEAR OR LOGARITHMIC INDICATION OF THE PRESSURE PREVAILING IN THE MEASURING HEAD AND IN THE VESSEL CONNECTED THERETO.
Claim 2
Dependent Claim
161 words
IN AN IONIZATION VACUUM METER FOR MEASURING PRESSURE CHANGES OF A VACUUM IN A VESSEL, THE METER COMPRISING A MEASURING HEAD CONNECTED TO THE VESSEL AND HAVING AN ELECTRON SOURCE, AN ANODE AND AN ION COLLECTOR, AND AN ELECTRICAL POWER SUPPLY CONNECTED TO THE MEASURING HEAD FOR CONTROLLING THE ELECTRON CURRENT AND THE POTENTIAL DISTRIBUTION IN THE MEASURING HEAD, THE ION COLLECTOR BEING CONNECTED WITH AN ELECTRICAL AMPLIFYING DEVICE GIVING AN INDICATION AND REGISTRATION OF THE PRESSURE PREVAILING IN THE VESSEL; THE IMPROVEMENT COMPRISING AN ELECTRICAL CIRCUIT INCLUDING A SWITCHING MEANS, AND SAID DEVICE, THE DEVICE COMPRISING TWO AMPLIFIERS, THE FIRST ONE OF WHICH HAS A LINEAR RESPONSE AND INDICATION TO THE ION CURRENT, THE SECOND ONE OF WHCIH HAS A LOGARITHMIC RESPONSE, AND THE SWITHCING MEANS BEING CAPABLE OF SELECTIVELY SWITCHING FROM THE LINEAR AMPLIFIER TO THE LOGARITHMIC AMPLIFIER, THEREBY GIVING A LINEAR OR LOGARITHMIC INDICATION OF THE PRESSURE PREVAILING IN THE MEASURING HEAD AND IN THE VESSEL CONNECTED THERETO.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |