Patent US3723721A successfully refreshed from Google Patents.
US3723721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting system for motor vehicles
Assignee: SWF Auto Electric GmbH
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Filing: 1971-02-11
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Granted: 1973-03-27
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Expires: 1991-02-11
Abstract
Abstract In the automobile lighting system disclosed, a rear lamp includes two filaments. One of the filaments is turned on along with the parking lights and headlamps. A fog lamp switch completes a circuit to energize the second filament. The latter produces a more powerful light than the first filament.
Inventors
- 👤 M Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:25
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/18; B60Q1/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
A lighting system for automotive vehicles, comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, and second circuit means for connecting said fog light switch to said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, said second circuit means including conductive means connecting said fog lamps and said second filament to said fog light switch so that said fog light switch energizes said fog lamps and said second filaments simultaneously.
Claim 2
Dependent Claim
134 words
A lighting system for automotive vehicles, comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, and second circuit means for connecting said fog light switch to said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, said second circuit means including conductive means connecting said fog lamps and said second filament to said fog light switch so that said fog light switch energizes said fog lamps and said second filaments simultaneously.
Claim 3
Dependent Claim
166 words
A lighting system for automotive vehicles,comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, second circuit means for connecting said fog light switch to said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, and head lamps, said first circuit means including conductive means connecting said head lamps to said main lamp switch so as to be operated thereby, said second circuit means includiNg second conductive means for connecting said fog light switch in series with said main light switch so that said fog lamps and said second filament may be energized only when said main light switch switches on said head lamps.
Claim 4
Dependent Claim
166 words
A lighting system for automotive vehicles,comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, second circuit means for connecting said fog light switch to said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, and head lamps, said first circuit means including conductive means connecting said head lamps to said main lamp switch so as to be operated thereby, said second circuit means includiNg second conductive means for connecting said fog light switch in series with said main light switch so that said fog lamps and said second filament may be energized only when said main light switch switches on said head lamps.
Claim 5
Dependent Claim
24 words
A system as in claim 1, further comprising a pilot lamp, said second circuit means connecting said pilot lamp to said fog light switch.
Claim 6
Dependent Claim
25 words
A lighting system as in claim 2, further comprising a pilot lamp, said second circuit means connecting said pilot lamp to said fog light switch.
Claim 7
Dependent Claim
127 words
A lighting system for automotive vehicles, comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, and second circuit means for connecting said fog light switch through said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, said second filament having a higher light output when energized than said first filament so that said second filament when energized can serve as a rear fog lamp.
Claim 8
Dependent Claim
127 words
A lighting system for automotive vehicles, comprising a plurality of rear lamps, a plurality of fog lamps, a main light switch, a fog light switch, one of said rear lamps having a first filament and a second filament, first circuit means for connecting said main light switch to said first filament so that said first filament may be energized through said main light switch, and second circuit means for connecting said fog light switch through said second filament and said fog lamps so that said second filament and said fog lamps may be energized through said fog light switch, said second filament having a higher light output when energized than said first filament so that said second filament when energized can serve as a rear fog lamp.
Claim 9
Dependent Claim
40 words
A system as in claim 5, wherein the number of rear lamps is two and said rear lamps are a right rear lamp and a left rear lamp, said rear lamp having the two filaments being the left rear lamp.
Claim 10
Dependent Claim
51 words
A system as in claim 5, wherein said second circuit means includes second conductive means for connecting said fog light switch in series with said main light switch so that said fog lamps and said second filament may be energized only when said main light switch switches on said head lamps.
Claim 11
Dependent Claim
76 words
A system as in claim 7, further comprising head lamps, said first circuit means including conductive means connecting said head lamp to said main lamp switch so as to be operated thereby, said second circuit means including second conductive means for connecting said fog light switch in series with said main light switch so that said fog lamps in said second filament may be energized only when said main light switch switches on said head lamps.
Claim 12
Dependent Claim
24 words
A system as in claim 5, further comprising a pilot lamp, said second circuit means connecting said pilot lamp to said fog light switch.
Claim 13
Dependent Claim
24 words
A system as in claim 8, further comprising a pilot lamp, said second circuit means connecting said pilot lamp to said fog light switch.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |