US3223913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charger and voltage control means
Assignee: Pyrotector Inc
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Filing: 1962-03-15
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Granted: 1965-12-14
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Expires: 1982-03-15
Abstract
No abstract record available.
Inventors
- 👤 Rudolph W Kalns
- 👤 Alfred W Vasel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:57
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/60; H02J7/61; H02J7/80; H02J7/82; H02J7/825; H02J2207/00; H02J2207/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A BATTERY CHARGER, COMPRISING A TRANSFORMER HAVING FIRST AND SECOND SECONDARY WINDINGS ADAPTED TO PROVIDE VOLTAGES OUT OF PHASE WITH EACH OTEHR, AND HAVING A COMMON JUNCTION, A CHARGING CIRCUIT IN SERIES WITH SAID FIRS WINDING AND INCLUDING A CONTROLLED RECTIFIER HAVING A CONTROL ELECTRODE, A BIAS CIRCUIT IN PARALLEL WITH SAID CHARGING CIRCUIT AND HAVING MEANS FOR PROVIDING A BIAS TO SAID CONTROL ELECTRODE, AND A ZENER DIODE CONNECTED BETWEEN SAID CONTROL CIRCUIT AND SAID SECONDARY WINDING, WHEREBY A VOLTAGE IS APPLIED TO SAID ZENER DOIDE DURING SAID CHARGING CYCLE WHICH IS OF OPPOSITE POLARITY TO THE BIAS VOLTAGE.
Claim 2
Dependent Claim
100 words
A BATTERY CHARGER, COMPRISING A TRANSFORMER HAVING FIRST AND SECOND SECONDARY WINDINGS ADAPTED TO PROVIDE VOLTAGES OUT OF PHASE WITH EACH OTEHR, AND HAVING A COMMON JUNCTION, A CHARGING CIRCUIT IN SERIES WITH SAID FIRS WINDING AND INCLUDING A CONTROLLED RECTIFIER HAVING A CONTROL ELECTRODE, A BIAS CIRCUIT IN PARALLEL WITH SAID CHARGING CIRCUIT AND HAVING MEANS FOR PROVIDING A BIAS TO SAID CONTROL ELECTRODE, AND A ZENER DIODE CONNECTED BETWEEN SAID CONTROL CIRCUIT AND SAID SECONDARY WINDING, WHEREBY A VOLTAGE IS APPLIED TO SAID ZENER DOIDE DURING SAID CHARGING CYCLE WHICH IS OF OPPOSITE POLARITY TO THE BIAS VOLTAGE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |