US3091697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photomultiplier control circuit
Assignee: ETHEL D ARMBRECHT
•
Filing: 1961-02-15
•
Granted: 1963-05-28
•
Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Armbrecht
- 👤 John E Malloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01N21/59; G01N21/5907; G01N21/5911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A RADIATION-MEASURING SYSTEM THE COMBINATION, COMPRISING: A PHOTOMULTIPLIER TUBE PROVIDED WITH A PLURALITY OF DYNODES CONNECTED BY A RESISTANCE NETWORK, AN ANODE, AND A PHOTO CATHODE; SAID SYSTEM INCLUDING A FIRST VOLTAGE REGULATOR TUBE HAVING A PLURALITY OF CONTROL GRIDS ONE OF WHICH IS CONNECTED TO SAID ANODE SAID PHOTOMULTIPLIER TUBE PROVIDING AN OUTPUT SIGNAL PROPORTIONAL TO THE INCIDENT LIGHT STRIKING SAID PHOTO CATHODE WHEREBY A SERIES OF VOLTAGES SUBSTANTIALLY LINEARLY PROPORTIONAL TO A SERIES OF ABSORBANCE UNITS OF A STANDARD STEP WEDGE MAY BE PRODUCED; AND FURTHER REGULATORY MEANS FOR AUTOMATICALLY VARYING THE RESISTANCE OF SAID NETWORK IN RELATION TO THE INCIDENT LIGHT STRIKING SAID CATHODE TO THEREBY PROVIDE A SUBSTANTIALLY LINEAR FUNCTION OF SAID VOLTAGES OVER A WIDER RANGE OF ABSORBANCE UNITS, SAID FURTHER REGULATORY MEANS COMPRISING A SECOND REGULATOR TUBE RESPONSIVE TO THE OUTPUT VOLTAGE OF SAID PHOTOMULTIPLIER TUBE AND CONNECTED TO A CONTROL GRID OF SAID FIRST VOLTAGE REGULATOR TUBE.
Claim 2
Dependent Claim
155 words
IN A RADIATION-MEASURING SYSTEM THE COMBINATION, COMPRISING: A PHOTOMULTIPLIER TUBE PROVIDED WITH A PLURALITY OF DYNODES CONNECTED BY A RESISTANCE NETWORK, AN ANODE, AND A PHOTO CATHODE; SAID SYSTEM INCLUDING A FIRST VOLTAGE REGULATOR TUBE HAVING A PLURALITY OF CONTROL GRIDS ONE OF WHICH IS CONNECTED TO SAID ANODE SAID PHOTOMULTIPLIER TUBE PROVIDING AN OUTPUT SIGNAL PROPORTIONAL TO THE INCIDENT LIGHT STRIKING SAID PHOTO CATHODE WHEREBY A SERIES OF VOLTAGES SUBSTANTIALLY LINEARLY PROPORTIONAL TO A SERIES OF ABSORBANCE UNITS OF A STANDARD STEP WEDGE MAY BE PRODUCED; AND FURTHER REGULATORY MEANS FOR AUTOMATICALLY VARYING THE RESISTANCE OF SAID NETWORK IN RELATION TO THE INCIDENT LIGHT STRIKING SAID CATHODE TO THEREBY PROVIDE A SUBSTANTIALLY LINEAR FUNCTION OF SAID VOLTAGES OVER A WIDER RANGE OF ABSORBANCE UNITS, SAID FURTHER REGULATORY MEANS COMPRISING A SECOND REGULATOR TUBE RESPONSIVE TO THE OUTPUT VOLTAGE OF SAID PHOTOMULTIPLIER TUBE AND CONNECTED TO A CONTROL GRID OF SAID FIRST VOLTAGE REGULATOR TUBE.
References Cited (Backward Citations)
US2457747A
Cited
US2678581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |