Patent US3121817A successfully refreshed from Google Patents.
US3121817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lighting unit
Assignee: Westinghouse Electric Corp
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Filing: 1960-07-14
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Granted: 1964-02-18
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Expires: 1980-07-14
Abstract
No abstract record available.
Inventors
- 👤 George B Saviers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN COMBINATION WITH AN ELECTRIC LIGHTING UNIT OF THE TYPE WHEREIN A PLANAR LIGHT SOURCE IS HELD IN AN ENCLOSURE BY RETAINING MEANS SECURED TO SAID ENCLOSURE, AND WHEREIN SAID LIGHT SOURCE IS SUSCEPTIBLE TO DAMAGE FROM ARCING AND CARRIES CONTACTS DISPOSED TO EFFECT PRESSURE ENGAGEMENT WITH RESILIENT CONTACTOR MEMBERS HELD BY SAID RETAINING MEANS; MEANS FOR INHIBITING AND MINIMIZING ARCING WITHIN SAID LIGHT SOURCE UNDER OVERLOAD CONDITIONS COMPRISING A COMPOSITE TYPE RESISTOR CLAMPED BETWEEN THE END OF ONE OF SAID CONTACTOR MEMBERS AND THE RESPECTIVE CONTACT OF SAID LIGHT SOURCE, SAID RESISTOR HAVING AN ELECTRICALLY CONDUCTIVE COATING ON EACH OF ITS ENGAGED SURFACES AND BEING OF SUCH DIMENSIONS THAT IT CONSTITUTES A PREDETERMINED IMPEDANCE IN SERIES WITH SAID LIGHT SOURCE.
Claim 2
Dependent Claim
121 words
IN COMBINATION WITH AN ELECTRIC LIGHTING UNIT OF THE TYPE WHEREIN A PLANAR LIGHT SOURCE IS HELD IN AN ENCLOSURE BY RETAINING MEANS SECURED TO SAID ENCLOSURE, AND WHEREIN SAID LIGHT SOURCE IS SUSCEPTIBLE TO DAMAGE FROM ARCING AND CARRIES CONTACTS DISPOSED TO EFFECT PRESSURE ENGAGEMENT WITH RESILIENT CONTACTOR MEMBERS HELD BY SAID RETAINING MEANS; MEANS FOR INHIBITING AND MINIMIZING ARCING WITHIN SAID LIGHT SOURCE UNDER OVERLOAD CONDITIONS COMPRISING A COMPOSITE TYPE RESISTOR CLAMPED BETWEEN THE END OF ONE OF SAID CONTACTOR MEMBERS AND THE RESPECTIVE CONTACT OF SAID LIGHT SOURCE, SAID RESISTOR HAVING AN ELECTRICALLY CONDUCTIVE COATING ON EACH OF ITS ENGAGED SURFACES AND BEING OF SUCH DIMENSIONS THAT IT CONSTITUTES A PREDETERMINED IMPEDANCE IN SERIES WITH SAID LIGHT SOURCE.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |