US3383539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection lamp
Assignee: GTE Sylvania Inc
•
Filing: 1967-02-06
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Granted: 1968-05-14
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Robert F Scoledge
- 👤 Stuart S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:42
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/14; H01K7/00; H01K7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
AN INCANDESCENT PROJECTION LAMP COMPRISING A SEALED ENCLOSING ENVELOPE, SUPPORT WIRES IN SAID ENVELOPE, A REFLECTOR INSIDE SAID ENVELOPE, AND A FILAMENT IN REFLECTING RELATIONSHIP TO SAID REFLECTOR, SAID FILAMENT COMPRISING A COIL HAVING A SPUD THEREIN AT THE ENDS ONLY OF SAID COIL, THE TURN OF SAID COIL AT THE INSIDE ENDS OF SAID SPUD BEING STRETCHED OUT SO THAT PART OF IT IS IN CONTACT WITH SAID SPUDS AND PART OF IT BEYOND SAID SPUD, THE PORTION OF THE COIL HAVING THE SPUD THEREIN HAVING THEIR LONGITUDINAL AXES SUBSTANTIALLY IN LINE WITH EACH OTHER, THE FILAMENT COIL BEING SUPPORTED SOLELY BY SAID SPUD, AN END OF EACH COIL WITH A SPUD THEREIN BEING AFFIXED PERPENDICULARLY TO SUPPORT WIRE, THE SUPPORT WIRES BEING SEALED THROUGH SAID ENVELOPE AT ONE END THEREOF, AND THE PORTIONS OF THE COIL HAVING THE SPUDS THEREIN BEING IN LINE WITH THE TOP OF THE COIL, THE TOP BEING TAKEN AS THE PART OPPOSITE TO THAT NEAREST THE END OF SAID ENVELOPE THROUGH WHICH THE SUPPORT WIRES ARE SEALED, THE PULLED OUT TURN BEING IN LINE WITH THE SPUDS AND EXTENDING TO LEGS OF THE COIL ALSO IN LINE WITH EACH OTHER, WHEREBY ANY SAG IN THE TURNS OF THE COIL WILL BEND THEM OUTWARD FROM EACH OTHER AND THEREBY PREVENT SHORT-CIRCUITING.
Claim 2
Dependent Claim
217 words
AN INCANDESCENT PROJECTION LAMP COMPRISING A SEALED ENCLOSING ENVELOPE, SUPPORT WIRES IN SAID ENVELOPE, A REFLECTOR INSIDE SAID ENVELOPE, AND A FILAMENT IN REFLECTING RELATIONSHIP TO SAID REFLECTOR, SAID FILAMENT COMPRISING A COIL HAVING A SPUD THEREIN AT THE ENDS ONLY OF SAID COIL, THE TURN OF SAID COIL AT THE INSIDE ENDS OF SAID SPUD BEING STRETCHED OUT SO THAT PART OF IT IS IN CONTACT WITH SAID SPUDS AND PART OF IT BEYOND SAID SPUD, THE PORTION OF THE COIL HAVING THE SPUD THEREIN HAVING THEIR LONGITUDINAL AXES SUBSTANTIALLY IN LINE WITH EACH OTHER, THE FILAMENT COIL BEING SUPPORTED SOLELY BY SAID SPUD, AN END OF EACH COIL WITH A SPUD THEREIN BEING AFFIXED PERPENDICULARLY TO SUPPORT WIRE, THE SUPPORT WIRES BEING SEALED THROUGH SAID ENVELOPE AT ONE END THEREOF, AND THE PORTIONS OF THE COIL HAVING THE SPUDS THEREIN BEING IN LINE WITH THE TOP OF THE COIL, THE TOP BEING TAKEN AS THE PART OPPOSITE TO THAT NEAREST THE END OF SAID ENVELOPE THROUGH WHICH THE SUPPORT WIRES ARE SEALED, THE PULLED OUT TURN BEING IN LINE WITH THE SPUDS AND EXTENDING TO LEGS OF THE COIL ALSO IN LINE WITH EACH OTHER, WHEREBY ANY SAG IN THE TURNS OF THE COIL WILL BEND THEM OUTWARD FROM EACH OTHER AND THEREBY PREVENT SHORT-CIRCUITING.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |