Patent US3209202A successfully refreshed from Google Patents.
US3209202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive fluorescent lamp starter
Assignee: Machinery Electrification Inc
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Filing: 1961-11-21
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Granted: 1965-09-28
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Francis P Dunigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:29
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A LAMP CIRCUIT, COMPRISING AN ELONGATED GASEOUS DISCHARGE LAMP HAVING AN INCANDESCENT ELEMENT AT EACH END, EACH ELEMENT HAVING TWO TERMINALS, A POWER LINE ADAPTED TO CONNECT ONE OF THER TERMINALS OF EACH ELEMENT TO A SOURCE OF ELECTRICAL POWER, A LINE CONNECTING THE OTHER TERMINALS OF THE ELEMENTS, A RELAY HAVING A NORMALLY-CLOSED SWITCH AND AN ACTUATING COIL, THE SWITCH CONNECTED IN SERIES IN THE CONNECTING LINE TO INTERRUPT, ON OCCASION, THE FLOW OF CURRENT THROUGH THE ELEMENTS, AND A PHOTO-SENSITIVE MEMBER ARRANGED ADJACENT ONE OF THE SAID ELEMENTS TO RECEIVE LIGHT THEREFROM AND TO CHANGE ITS CONDITION WHEN THE ELEMENT REACHES A PREDETERMINED LEVEL OF INCANDESCENCE, THE SAID MEMEBR AND THE SAID COIL BEING CONNECTED IN SERIES WITH ONE ANOTHER FROM ONE POWER LINE TO THE OTHER.
Claim 2
Dependent Claim
129 words
A LAMP CIRCUIT, COMPRISING AN ELONGATED GASEOUS DISCHARGE LAMP HAVING AN INCANDESCENT ELEMENT AT EACH END, EACH ELEMENT HAVING TWO TERMINALS, A POWER LINE ADAPTED TO CONNECT ONE OF THER TERMINALS OF EACH ELEMENT TO A SOURCE OF ELECTRICAL POWER, A LINE CONNECTING THE OTHER TERMINALS OF THE ELEMENTS, A RELAY HAVING A NORMALLY-CLOSED SWITCH AND AN ACTUATING COIL, THE SWITCH CONNECTED IN SERIES IN THE CONNECTING LINE TO INTERRUPT, ON OCCASION, THE FLOW OF CURRENT THROUGH THE ELEMENTS, AND A PHOTO-SENSITIVE MEMBER ARRANGED ADJACENT ONE OF THE SAID ELEMENTS TO RECEIVE LIGHT THEREFROM AND TO CHANGE ITS CONDITION WHEN THE ELEMENT REACHES A PREDETERMINED LEVEL OF INCANDESCENCE, THE SAID MEMEBR AND THE SAID COIL BEING CONNECTED IN SERIES WITH ONE ANOTHER FROM ONE POWER LINE TO THE OTHER.
References Cited (Backward Citations)
US2217939A
Cited
US2917665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |