Patent US1649790A successfully refreshed from Google Patents.
Patent US3288195A successfully refreshed from Google Patents.
US3288195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe control apparatus
Assignee: —
•
Filing: —
•
Granted: 1966-11-29
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:44
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F23N5/24; F23N5/242; F23N2223/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A FAIL-SAFE CIRCUIT COMPRISING A LOAD, A POWER SOURCE FOR ENERGIZING SAID LOAD, COUPLING CIRCUITRY FOR COUPLING POWER FROM SAID SOURCE TO SAID LOAD INCLUDING TWO ENERGY STORAGE DEVICES, FIRST CIRCUIT MEANS TO PROVIDE A FIRST ENERGY TRANSFER LOOP BETWEEN SAID SOURCE AND ONE ENERGY STORAGE DEVICE INDEPENDENT OF SAID LOAD AND A SECOND ENERGY TRANSFER LOOP BETWEEN THE SECOND ENERGY STORAGE DEVICE AND SAID LOAD INDEPENDENT OF SAID SOURCE, SECOND CIRCUIT MEANS TO PROVIDE A THIRD ENERGY TRANSFER LOOP BETWEEN SAID SOURCE AND SAID SECOND ENERGY STORAGE DEVICE INDEPENDENT OF SAID LOAD AND A FOURTH ENERGY TRANSFER LOOP BETWEEN SAID ONE ENERGY STORAGE DEVICE AND SAID LOAD INDEPENDENT OF SAID SOURCE, AND MEANS TO ALTERNATELY COMPLETE SAID FIRST AND SECOND CIRUIT MEANS FOR TRANSFERRING ENERGY FROM SAID SOURCE THROUGH SAID ENERGY STORAGE DEVICES TO SAID LOAD.
Claim 2
Dependent Claim
137 words
A FAIL-SAFE CIRCUIT COMPRISING A LOAD, A POWER SOURCE FOR ENERGIZING SAID LOAD, COUPLING CIRCUITRY FOR COUPLING POWER FROM SAID SOURCE TO SAID LOAD INCLUDING TWO ENERGY STORAGE DEVICES, FIRST CIRCUIT MEANS TO PROVIDE A FIRST ENERGY TRANSFER LOOP BETWEEN SAID SOURCE AND ONE ENERGY STORAGE DEVICE INDEPENDENT OF SAID LOAD AND A SECOND ENERGY TRANSFER LOOP BETWEEN THE SECOND ENERGY STORAGE DEVICE AND SAID LOAD INDEPENDENT OF SAID SOURCE, SECOND CIRCUIT MEANS TO PROVIDE A THIRD ENERGY TRANSFER LOOP BETWEEN SAID SOURCE AND SAID SECOND ENERGY STORAGE DEVICE INDEPENDENT OF SAID LOAD AND A FOURTH ENERGY TRANSFER LOOP BETWEEN SAID ONE ENERGY STORAGE DEVICE AND SAID LOAD INDEPENDENT OF SAID SOURCE, AND MEANS TO ALTERNATELY COMPLETE SAID FIRST AND SECOND CIRUIT MEANS FOR TRANSFERRING ENERGY FROM SAID SOURCE THROUGH SAID ENERGY STORAGE DEVICES TO SAID LOAD.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |