US3092747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional counter
Assignee: US Philips Corp
•
Filing: 1959-01-09
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Granted: 1963-06-04
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Expires: 1979-01-09
Abstract
No abstract record available.
Inventors
- 👤 Fine Samuel
- 👤 Charles F Hendee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:31
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A RADIATION-DETECTING GAS-TYPE PROPORTIONAL COUNTER COMPRISING A CATHODE ELECTRODE AND AN ANODE ELECTRODE AND BETWEEN THE ELECTRODES A GAS FILLING FREE OF OXYGEN CONSISTING ESSENTIALLY OF AN INERT GAS, MEANS APPLYING BETWEEN THE ELECTRODE A POTENTIAL AT WHICH, WHEN EXTERNAL RADIATION IS ABSORBED BY THE GAS FILLING GENERATING ELECTRON-IRON-PARIS BY IONIZATION, THE SAID ELECTRONS AND IONS ARE ACCELERATED TOWARD THE ELECTRODES AT A RATE CAUSNG FURTHER IONIZATION AND MULTIPLYING THE NUMBER OF ELECTRONS AND IONS PRESENT BY A TOWNSEND AVALANCHE, WHICH ELECTRONS AND IONS WHEN COLLECTED BY THE ELECTRODES PRODUCE A CURRENT PULSE WHOSE MAGNITUDE IS PROPORTIONAL TO THE ENERGY OF THE ABSORBED EXTERNAL RADIATION, SAID POTENTIAL ALSO HAVING A VALUE AT WHICH THE SAID PROPORTIONAL CURRENT PULSE TENDS TO BE FOLLOWED BY A GROUP OF UNWANTED SPURIOUS AFTERPULSE, AND MEANS FOR ELININATING THE SAID SPURIOUS AFTERPULSES WITHOUT SUBSTANTIALLY LIMITING THE LIFETIME OF THE COUNTER, SAID MEANS COMPRISING BETWEEN 1% AND 70% BY VOLUME OF OXYGEN-FREE NITROGEN GAS ADDED TO THE GAS FILLING.
Claim 2
Dependent Claim
163 words
A RADIATION-DETECTING GAS-TYPE PROPORTIONAL COUNTER COMPRISING A CATHODE ELECTRODE AND AN ANODE ELECTRODE AND BETWEEN THE ELECTRODES A GAS FILLING FREE OF OXYGEN CONSISTING ESSENTIALLY OF AN INERT GAS, MEANS APPLYING BETWEEN THE ELECTRODE A POTENTIAL AT WHICH, WHEN EXTERNAL RADIATION IS ABSORBED BY THE GAS FILLING GENERATING ELECTRON-IRON-PARIS BY IONIZATION, THE SAID ELECTRONS AND IONS ARE ACCELERATED TOWARD THE ELECTRODES AT A RATE CAUSNG FURTHER IONIZATION AND MULTIPLYING THE NUMBER OF ELECTRONS AND IONS PRESENT BY A TOWNSEND AVALANCHE, WHICH ELECTRONS AND IONS WHEN COLLECTED BY THE ELECTRODES PRODUCE A CURRENT PULSE WHOSE MAGNITUDE IS PROPORTIONAL TO THE ENERGY OF THE ABSORBED EXTERNAL RADIATION, SAID POTENTIAL ALSO HAVING A VALUE AT WHICH THE SAID PROPORTIONAL CURRENT PULSE TENDS TO BE FOLLOWED BY A GROUP OF UNWANTED SPURIOUS AFTERPULSE, AND MEANS FOR ELININATING THE SAID SPURIOUS AFTERPULSES WITHOUT SUBSTANTIALLY LIMITING THE LIFETIME OF THE COUNTER, SAID MEANS COMPRISING BETWEEN 1% AND 70% BY VOLUME OF OXYGEN-FREE NITROGEN GAS ADDED TO THE GAS FILLING.
References Cited (Backward Citations)
US2503302A
Cited
US2929932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |