Patent US3818263A successfully refreshed from Google Patents.
US3818263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic component
Assignee: Individual
•
Filing: 1972-05-05
•
Granted: 1974-06-18
•
Expires: 1992-05-05
Abstract
Abstract Devices for prolonging the life of an electric light bulb adapted to fit into a light socket between the central contact of the light socket and the central contact of the light bulb. Disclosed are combinations of rectifying and resistive elements, preferably temperature responsive resistive elements which function to reduce turn-on surges and lower the operating temperature of the bulb filament. Also disclosed is a method of utilizing a printed circuit board to provide physical and electrical mounting as well as component encapsulation for the rectifying and/or resistive elements.
Inventors
- 👤 W Belko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/945; H01R33/9453; H05; H05B; H05B39/00; H05B39/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
A device for prolonging the life of an electric light bulb and adapted to fit in the bulb socket between the central contact of the socket and the central contact of the bulb, the device having an electrical circuit comprising a diode rectifier in series electrical arrangement with the bulb, a first resistor in parallel electrical arrangement with the diode rectifier, the first resistor permitting a portion of the current to by-pass said diode rectifier when the device is in operation and at least one additional resistor in series electrical arrangement with the bulb filament in said electrical circuit.
Claim 2
Independent Claim
99 words
A device for prolonging the life of an electric light bulb and adapted to fit in the bulb socket between the central contact of the socket and the central contact of the bulb, the device having an electrical circuit comprising a diode rectifier in series electrical arrangement with the bulb, a first resistor in parallel electrical arrangement with the diode rectifier, the first resistor permitting a portion of the current to by-pass said diode rectifier when the device is in operation and at least one additional resistor in series electrical arrangement with the bulb filament in said electrical circuit.
Claim 3
Dependent Claim
31 words
A device as in claim 1 wherein the absolute resistance value of said resistor is temperature responsive, changing said resistance value responsive to changes in temperature conditions in said electrical circuit.
Claim 4
Dependent Claim
15 words
A device as in claim 2 wherein said resistor is a negative temperature coefficient resistor.
Claim 5
Dependent Claim
30 words
A device as in claim 1 wherein said at least one additional resistor is temperature responsive, changing its absolute resistance value relative to changes in temperature in said electrical circuit.
Claim 6
Dependent Claim
19 words
A device as in claim 4 wherein said at least one additional resistor is a negative temperature coefficient resistor.
Claim 7
Independent Claim
76 words
A device for prolonging the life of an incandescent electric light bulb, said device being adapted to fit in the lanp socket intermediate the central contact of the soCket and the central contact of the bulb, the device having an electrical circuit comprising at least one temperature responsive resistive element, said element changing its absolute resistance value to temperature changes in said electrical circuit and a diode rectifier in parallel electrical relationship with the resistive element.
Claim 8
Independent Claim
76 words
A device for prolonging the life of an incandescent electric light bulb, said device being adapted to fit in the lanp socket intermediate the central contact of the soCket and the central contact of the bulb, the device having an electrical circuit comprising at least one temperature responsive resistive element, said element changing its absolute resistance value to temperature changes in said electrical circuit and a diode rectifier in parallel electrical relationship with the resistive element.
Claim 9
Dependent Claim
26 words
A device as in claim 6 wherein said electrical circuit further contains at least one additional resistive element in series electrical arrangement with the bulb filament.
Claim 10
Dependent Claim
18 words
A device as in claim 6 wherein said temperature responsive resistive element is a negative temperature coefficient resistor.
Claim 11
Dependent Claim
18 words
A device as in claim 6 wherein said temperature responsive resistance element is a positive temperature coefficient resistor.
Claim 12
Dependent Claim
22 words
A device as in claim 9 wherein said positive temperature coefficient resistor is in parallel electrical arrangement with the electric light bulb.
Claim 13
Dependent Claim
24 words
A device as in claim 10 wherein said electrical circuit also contains a diode rectifier in series electrical arrangement with the electric light bulb.
Claim 14
Independent Claim
109 words
A device for prolonging the life of an electric light bulb and adopted to fit in the bulb socket between the central contact of the socket and the central contact of the bulb the device having an electrical circuit interconnected with a printed circuit board; the electrical circuit comprising a diode rectifier in series electrical arrangement with the bulb and a resistor in parallel electrical arrangement with the diode rectifier; the printed circuit board having a hole therethrough with at least one of the elements in said electrical circuit being positioned in said hole, the hole being sealed at either end by a solder seal having a positive meniscus.
Claim 15
Independent Claim
109 words
A device for prolonging the life of an electric light bulb and adopted to fit in the bulb socket between the central contact of the socket and the central contact of the bulb the device having an electrical circuit interconnected with a printed circuit board; the electrical circuit comprising a diode rectifier in series electrical arrangement with the bulb and a resistor in parallel electrical arrangement with the diode rectifier; the printed circuit board having a hole therethrough with at least one of the elements in said electrical circuit being positioned in said hole, the hole being sealed at either end by a solder seal having a positive meniscus.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |