Patent US2931761A successfully refreshed from Google Patents.
US2931761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutronic reactor control
Assignee: Individual
•
Filing: 1955-12-14
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Granted: 1960-04-05
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Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Hurwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:22
CPC Classifications
G; G21; G21C; G21C7/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN APPARATUS FOR INDICATING THE APPROACH TO PROMPT CRITICALITY OF A NEUTRONIC REACTOR COMPRISING AN ELEMENT MADE OF A NEUTRON-ABSORBING MATERIAL, MEANS FOR OSCILLATING THE ELEMENT IN THE ACTIVE PORTION OF THE REACTOR AT A FREQUENCY WHICH IS LARGE COMPARED TO THE RECIPROCAL OF THE PERIOD OF THE DELAYED NEUTRONS BUT SMALL COMPARED TO THE RECIPROCAL OF THE PERIOD OF THE PROMPT NEUTRONS TO VARY THE REACTIVITY OF THE REACTOR, A DETECTOR FOR MEASURING THE NEUTRON FLUX AND CONVERTING THE FLUX INTO A SIGNAL HAVING A VARIABLE COMPONENT AND A STEADY COMPONENT, THE OUTPUT OF SAID DETECTOR BEING DIRECTED INTO A FIRST CHANNEL INCLUDING A NARROW BAND FILTER WITH BAND PASS FREQUENCY EQUAL TO THAT OF THE OSCILLATING CONTROL ELEMENT AND AN AMPLIFIER AND A SECOND CHANNEL INCLUDING AN AMPLIFIER, AND MEANS CONNECTED TO SAID CHANNELS FOR INDICATING THE RATIO OF THE SIGNAL PRODUCED BY THE FIRST CHANNEL TO THAT PRODUCED BY THE SECOND CHANNEL WHICH RATIO CONSTITUTES AN INDICATION OF THE APPROACH TO PROMPT CRITICALITY WHICH IS INDEPENDENT OF POWER LEVEL.
Claim 2
Independent Claim
172 words
AN APPARATUS FOR INDICATING THE APPROACH TO PROMPT CRITICALITY OF A NEUTRONIC REACTOR COMPRISING AN ELEMENT MADE OF A NEUTRON-ABSORBING MATERIAL, MEANS FOR OSCILLATING THE ELEMENT IN THE ACTIVE PORTION OF THE REACTOR AT A FREQUENCY WHICH IS LARGE COMPARED TO THE RECIPROCAL OF THE PERIOD OF THE DELAYED NEUTRONS BUT SMALL COMPARED TO THE RECIPROCAL OF THE PERIOD OF THE PROMPT NEUTRONS TO VARY THE REACTIVITY OF THE REACTOR, A DETECTOR FOR MEASURING THE NEUTRON FLUX AND CONVERTING THE FLUX INTO A SIGNAL HAVING A VARIABLE COMPONENT AND A STEADY COMPONENT, THE OUTPUT OF SAID DETECTOR BEING DIRECTED INTO A FIRST CHANNEL INCLUDING A NARROW BAND FILTER WITH BAND PASS FREQUENCY EQUAL TO THAT OF THE OSCILLATING CONTROL ELEMENT AND AN AMPLIFIER AND A SECOND CHANNEL INCLUDING AN AMPLIFIER, AND MEANS CONNECTED TO SAID CHANNELS FOR INDICATING THE RATIO OF THE SIGNAL PRODUCED BY THE FIRST CHANNEL TO THAT PRODUCED BY THE SECOND CHANNEL WHICH RATIO CONSTITUTES AN INDICATION OF THE APPROACH TO PROMPT CRITICALITY WHICH IS INDEPENDENT OF POWER LEVEL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |