US3586954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for charging accumulator batteries
Assignee: Eclairage des Vehicules Sur Rail EVR SA
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Filing: 1968-11-08
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Granted: 1971-06-22
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Expires: 1988-11-08
Abstract
Abstract A winding of an electric traction motor of an electric powered vehicle is employed as a smoothing choke in the charging circuit for an accumulator battery which normally supplies the power to the traction motor during vehicle operation.
Inventors
- 👤 Henri Carves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:11
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/973; H02J7/02; H02J2207/00; H02J2207/20; Y; Y10; Y10S; Y10S320/00; Y10S320/22; Y10S320/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
In a system comprising an electric motor having at least one winding, said motor powered by an accumulator battery which is recharged by a rectified alternating current, the improvement comprising: means for connecting a winding of said electric motor between said source and said accumulator battery whereby, during the recharging of the battery, said winding acts as a choke coil to smooth the charging current of the accumulator battery.
Claim 2
Dependent Claim
69 words
In a system comprising an electric motor having at least one winding, said motor powered by an accumulator battery which is recharged by a rectified alternating current, the improvement comprising: means for connecting a winding of said electric motor between said source and said accumulator battery whereby, during the recharging of the battery, said winding acts as a choke coil to smooth the charging current of the accumulator battery.
Claim 3
Dependent Claim
29 words
The system as claimed in claim 1 wherein said motor comprises the traction motor for a mobile craft, and said winding comprises the field winding of said traction motor.
Claim 4
Dependent Claim
61 words
In a battery-powered electric motor drive system wherein said battery is an accumulator battery, the improvement comprising: a recharging circuit comprising a source of rectified alternating current for recharging said accumulator battery, and control and regulating means for placing a coil means of said electric motor in series with said accumulator battery for smoothing the charging current to said accumulator battery.
Claim 5
Dependent Claim
61 words
In a battery-powered electric motor drive system wherein said battery is an accumulator battery, the improvement comprising: a recharging circuit comprising a source of rectified alternating current for recharging said accumulator battery, and control and regulating means for placing a coil means of said electric motor in series with said accumulator battery for smoothing the charging current to said accumulator battery.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |