US3683197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical systems for road vehicles
Assignee: ZF International UK Ltd
•
Filing: 1970-12-14
•
Granted: 1972-08-08
•
Expires: 1990-12-14
Abstract
Abstract An electrical system for a road vehicle includes a signal producing means which operates in a cycle to scan a number of switches in turn. If any switch is closed, a signal is supplied to a feed line, and this signal operates a load which is to be controlled by the switch which is closed. The load remains energized for a period of time longer than the scanning time of the signal producing means, and so as long as a switch remains closed, its load will remain energized, although only one feed line is necessary to conduct power to the load.
Inventors
- 👤 Andrew Peter Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:03
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315; B60R2016/0322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
An electrical system for a road vehicle, having the following features: a. a plurality of electrical loads disposed around the vehicle b. a plurality of centrally situated switches, one for each load c. a supply line extending around the vehicle d. at least three feed lines extending around the vehicle e. signal producing means operating cyclically to scan the switches in turn and to supply a signal to the feed lines when a switch is operated, the signal being supplied to the feed lines only when the switch is being scanned, and the signals associated with the switches respectively being unique and in the form of voltage levels f. a plurality of control devices, one for each load, the control devices being positioned adjacent their respective loads and each being connected to the feed lines g. the control device associated with any given load is energized only by a signal on the feed lines produced by closing of the switch associated with the given load h. each control device when energized connects its load to the supply line, so that the load is energized for a period of time greater than the cycle time of the signal producing means.
Claim 2
Dependent Claim
199 words
An electrical system for a road vehicle, having the following features: a. a plurality of electrical loads disposed around the vehicle b. a plurality of centrally situated switches, one for each load c. a supply line extending around the vehicle d. at least three feed lines extending around the vehicle e. signal producing means operating cyclically to scan the switches in turn and to supply a signal to the feed lines when a switch is operated, the signal being supplied to the feed lines only when the switch is being scanned, and the signals associated with the switches respectively being unique and in the form of voltage levels f. a plurality of control devices, one for each load, the control devices being positioned adjacent their respective loads and each being connected to the feed lines g. the control device associated with any given load is energized only by a signal on the feed lines produced by closing of the switch associated with the given load h. each control device when energized connects its load to the supply line, so that the load is energized for a period of time greater than the cycle time of the signal producing means.
References Cited (Backward Citations)
US3544803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |