US3710364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring installation of the lighting system of motor vehicles
Assignee: Daimler Benz AG
•
Filing: 1971-01-13
•
Granted: 1973-01-09
•
Expires: 1991-01-13
Abstract
Abstract An electrically operated installation in motor vehicles for monitoring the lighting system, especially the headlights, tail lights and brake lights, which includes light switches and an electromagnetic relay that controls a switch producing an acoustic or optical signal; the electromagnetic relay is provided with two oppositely wound coils for at least one of the functions of the lighting system to be monitored whereby the magnetic fields of these two coils mutually cancel in case the corresponding part of the lighting system operates completely satisfactorily.
Inventors
- 👤 H Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
B; B60; B60Q; B60Q11/00; B60Q11/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
An electrical monitoriNg installation for vehicle lighting systems comprising at least one pair of vehicle lights, a warning indicator, a power source, an electromagnetic relay including first and second oppositely wound coils of equal turns, a relay switch connected between said power source and said warning indicator and a third coil inductively coupled to said first and second coils, an operating switch selectively connecting said pair of vehicle lights through said respective first and second coils to said power source, and a starter switch selectively connecting said power source to said third coil at the time of starting of said vehicle to simultaneously determine the proper operability of said warning indicator and monitor the functioning of said electromagnetic relay.
Claim 2
Dependent Claim
119 words
An electrical monitoriNg installation for vehicle lighting systems comprising at least one pair of vehicle lights, a warning indicator, a power source, an electromagnetic relay including first and second oppositely wound coils of equal turns, a relay switch connected between said power source and said warning indicator and a third coil inductively coupled to said first and second coils, an operating switch selectively connecting said pair of vehicle lights through said respective first and second coils to said power source, and a starter switch selectively connecting said power source to said third coil at the time of starting of said vehicle to simultaneously determine the proper operability of said warning indicator and monitor the functioning of said electromagnetic relay.
Claim 3
Dependent Claim
15 words
An installation as defined in claim 1 wherein said warning indicator is an acoustic device.
Claim 4
Dependent Claim
16 words
An installation as defined in claim 1 wherein said warning indicator is a visual indicating device.
Claim 5
Dependent Claim
20 words
An installation as defined in claim 1 wherein said first, second and third coils are wound on an iron core.
References Cited (Backward Citations)
US1726994A
Cited
US1945528A
Cited
US3250950A
Cited
US3421143A
Cited
US3423727A
Cited
US3529288A
Cited
US3532928A
Cited
US3593274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |