Patent US2799781A successfully refreshed from Google Patents.
US2799781A
Expired / Lapsed
US
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Explosion detection and suppression
Assignee: Electronics Corp of America
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Filing: 1953-06-25
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Granted: 1957-07-16
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Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Bradford T Joyce
- 👤 Albert F Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:08
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/009; G; G08; G08B; G08B17/00; G08B17/06; G08B17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN EXPLOSION DETECTOR COMPRISING: A RADIATION-SENSITIVE CIRCUIT INCLUDING A PHOTOELECTRIC CELL, AN ELECTRON TUBE HAVING AN ANODE, A CATHODE AND A CONTROL ELECTRODE, BIASING MEANS TO MAINTAIN SAID ELECTRON TUBE NORMALLY NONCONDUCTIVE, A CAPACITOR CONNECTED BETWEEN THE ANODE OF SAID ELECTRON TUBE AND A POINT OF REFERENCE POTENTIAL, MEANS ADAPTED TO CHARGE SAID CAPACITOR, MEANS TO CONNECT TO THE CATHODE OF SAID ELECTRON TUBE, EXPLOSION SUPPRESSOR MEANS RESPONSIVE TO THE DISCHARGE OF SAID CAPACITOR THROUGH SAID ELECTRON TUBE, AND MEANS INCLUDING A DIFFERENTIATING CIRCUIT CONNECTED BETWEEN SAID RADIATION-SENSITIVE CIRCUIT AND THE CONTROL ELECTRODE OF SAID ELECTRON TUBE.
Claim 2
Dependent Claim
97 words
AN EXPLOSION DETECTOR COMPRISING: A RADIATION-SENSITIVE CIRCUIT INCLUDING A PHOTOELECTRIC CELL, AN ELECTRON TUBE HAVING AN ANODE, A CATHODE AND A CONTROL ELECTRODE, BIASING MEANS TO MAINTAIN SAID ELECTRON TUBE NORMALLY NONCONDUCTIVE, A CAPACITOR CONNECTED BETWEEN THE ANODE OF SAID ELECTRON TUBE AND A POINT OF REFERENCE POTENTIAL, MEANS ADAPTED TO CHARGE SAID CAPACITOR, MEANS TO CONNECT TO THE CATHODE OF SAID ELECTRON TUBE, EXPLOSION SUPPRESSOR MEANS RESPONSIVE TO THE DISCHARGE OF SAID CAPACITOR THROUGH SAID ELECTRON TUBE, AND MEANS INCLUDING A DIFFERENTIATING CIRCUIT CONNECTED BETWEEN SAID RADIATION-SENSITIVE CIRCUIT AND THE CONTROL ELECTRODE OF SAID ELECTRON TUBE.
References Cited (Backward Citations)
US1453091A
Cited
US1708869A
Cited
US2355664A
Cited
US2492148A
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US2668289A
Cited
US2570280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |