US3858103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging systems
Assignee: Lucas Electrical Co Ltd
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Filing: 1973-09-05
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Granted: 1974-12-31
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Expires: 1993-09-05
Abstract
Abstract A battery charging system for a road vehicle has a wound field alternator charging the battery through a full wave rectifier, and a voltage regulator controlling the current flow in the field winding of the alternator. The field winding is connected in the circuit so that in the event of a fault, the energy in the field winding is dissipated rapidly.
Inventors
- 👤 W Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/163; H02J7/24; H02J7/243; H02J7/60; H02J7/64; H02J7/80; Y; Y10; Y10S; Y10S320/00; Y10S320/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A battery charging system comprising in combination a wound field alternator providing power by way of a full wave rectifier to positive and negative supply lines between which the battery is connected, one or more additional diodes coupling the alternator output to a third supply line which when the alternator produces an output is at substantially the same potential at the first line, a warning lamp and ignition switch connected in series between the third and first lines, a pair of switching devices coupling opposite ends of the field winding of the alternator to the third and second lines, said switching devices forming part of a voltage regulator for connecting and disconnecting the field winding from the third and first supply lines in accordance with the output voltage of the alternator to regulate the output voltage of the alternator, a first diode having its cathode connected to the junction of the field winding of the first switching device and its anode connected to the second line, and second and third diodes having their anodes connected to the junction of the field winding and the second switching device, the cathode of the second diode being connected to the third line and the cathode of the third diode being connected to the first line.
Claim 2
Dependent Claim
212 words
A battery charging system comprising in combination a wound field alternator providing power by way of a full wave rectifier to positive and negative supply lines between which the battery is connected, one or more additional diodes coupling the alternator output to a third supply line which when the alternator produces an output is at substantially the same potential at the first line, a warning lamp and ignition switch connected in series between the third and first lines, a pair of switching devices coupling opposite ends of the field winding of the alternator to the third and second lines, said switching devices forming part of a voltage regulator for connecting and disconnecting the field winding from the third and first supply lines in accordance with the output voltage of the alternator to regulate the output voltage of the alternator, a first diode having its cathode connected to the junction of the field winding of the first switching device and its anode connected to the second line, and second and third diodes having their anodes connected to the junction of the field winding and the second switching device, the cathode of the second diode being connected to the third line and the cathode of the third diode being connected to the first line.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |