Patent US4835406A successfully refreshed from Google Patents.
US4835406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device
Assignee: Individual
•
Filing: 1987-01-29
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Granted: 1989-05-30
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Expires: 2007-01-29
Abstract
Abstract A plug in circuit component is provided for switching headlights of vehicles such as automobiles between two positions; full beam and half beam. When the headlight is switched from low to high beam, the low beam disappears in conventional systems, however with the present invention the low beam remains illuminated even when the high beam setting is on and this is accomplished preferably by the use of a diode in the device.
Inventors
- 👤 Sylve Ronndahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
H; H05; H05B; H05B39/00; H01; H01K; H01K1/00; H01K1/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A switching device for switching between a half beam and a full beam setting in a lamp circuit, such as a vehicle headlight and wherein said lamp circuit includes a lamp means having a low beam filament and a high beam filament, said filaments having a common terminal and two feed terminals, said device being in series between a direct current power supply and said lamp means and including a diode connected between said feed terminals, whereby in the full beam setting both the low beam and the high beam filaments are supplied with electrical current, but in the half beam setting, current is blocked from the high beam filament by said diode.
Claim 2
Dependent Claim
113 words
A switching device for switching between a half beam and a full beam setting in a lamp circuit, such as a vehicle headlight and wherein said lamp circuit includes a lamp means having a low beam filament and a high beam filament, said filaments having a common terminal and two feed terminals, said device being in series between a direct current power supply and said lamp means and including a diode connected between said feed terminals, whereby in the full beam setting both the low beam and the high beam filaments are supplied with electrical current, but in the half beam setting, current is blocked from the high beam filament by said diode.
Claim 3
Dependent Claim
48 words
A switching device as set forth in claim 1, and further including an insulated housing encapsulating said diode and three plug members having male portions extending from said housing for insertion into a power cable and female portions on the opposite end therefrom for connection to a lamp.
Claim 4
Dependent Claim
18 words
A switching device as defined in claim 2, wherein said insulated housing is provided with heat dissipating fins.
Claim 5
Dependent Claim
19 words
A switching device as defined in claim 2 wherein said diode is connected between two of said plug members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |