US3921050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmed battery charging system
Assignee: Schauer Manufacturing Corp
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Filing: 1974-10-02
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Granted: 1975-11-18
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Expires: 1994-10-02
Abstract
Abstract A circuit controlling a battery charging system adapted to progressively boost charge a succession of banks of series connected, newly manufactured batteries, said circuit including a stand-by switch means adapted to periodically initiate the battery charging system whereby to maintain all the batteries in satisfactory charged conditions for the ultimate users thereof.
Inventors
- 👤 Clifford A Rowas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
In a programmed battery charging system the combination of a fully regulated, constant current boost charging circuit, a plurality of banks, each bank having a number of series connected batteries therein, a conductor connecting each bank of batteries to the charging circuit, a series of first switches each interposed in a conductor, a stand-by circuit connected across the charging circuit, a visible indicator means and a second switch interposed in series in the stand-by circuit, and a continuously operable sequence control means adapted to progressively actuate and disconnect each first switch to boost charge successive banks of batteries, then actuate the second switch to monitor a non-charging period of the system and finally initiate the boost charging circuit following the non-charging period.
Claim 2
Dependent Claim
122 words
In a programmed battery charging system the combination of a fully regulated, constant current boost charging circuit, a plurality of banks, each bank having a number of series connected batteries therein, a conductor connecting each bank of batteries to the charging circuit, a series of first switches each interposed in a conductor, a stand-by circuit connected across the charging circuit, a visible indicator means and a second switch interposed in series in the stand-by circuit, and a continuously operable sequence control means adapted to progressively actuate and disconnect each first switch to boost charge successive banks of batteries, then actuate the second switch to monitor a non-charging period of the system and finally initiate the boost charging circuit following the non-charging period.
Claim 3
Dependent Claim
24 words
In a programmed battery charging system as set forth in claim 1 wherein all the first switches and the second switch are controlled rectifiers.
Claim 4
Dependent Claim
34 words
In a programmed battery charging system as set forth in claim 1 wherein a power unit operates the sequence control means, and a center tapped memory battery assembly is connected to the power unit.
References Cited (Backward Citations)
US2977525A
Cited
US3796940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |