US3118101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic polarity changer for battery charging systems
Assignee: ELECTROTONE LAB Inc
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Filing: 1961-12-14
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Granted: 1964-01-14
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Arber Amihadar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:14
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; Y; Y10; Y10S; Y10S320/00; Y10S320/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN ELECTRICAL BATTERY CHARGER APPARATUS COMPRISING, A RECTIFIER CIRCUIT HAVING MEANS FOR CONNECTING THE CIRCUIT TO AN A.C. CURRENT SOURCE AND A PAIR OF CHARGER TERMINALS ADAPTED TO BE CONNECTED IN RANDOM POLARITY TO THE TERMINALS OF THE BATTERY FOR SUPPLYING CHARGING CURRENT THERETO, AND AN AUTOMATIC POLARITY CHANGER CIRCUIT CONNECTED BETWEEN THE CHARGER TERMINALS AND THE RECTIFIER CIRCUIT WHICH INCLUDES A BI-STABLE SWITCHING RELAY OPERABLE TO ESTABLISH THE CONNECTION OF THE TERMINALS OF THE CHARGER AND BATTERY RESPECTIVELY AT THE PROPER POLARITY REGARDLESS OF THE POLARITY OF THE INITIAL CONNECTION THEREOF WITHOUT REQUIRING ANY EXTERNAL POWER SOURCE.
Claim 2
Dependent Claim
98 words
AN ELECTRICAL BATTERY CHARGER APPARATUS COMPRISING, A RECTIFIER CIRCUIT HAVING MEANS FOR CONNECTING THE CIRCUIT TO AN A.C. CURRENT SOURCE AND A PAIR OF CHARGER TERMINALS ADAPTED TO BE CONNECTED IN RANDOM POLARITY TO THE TERMINALS OF THE BATTERY FOR SUPPLYING CHARGING CURRENT THERETO, AND AN AUTOMATIC POLARITY CHANGER CIRCUIT CONNECTED BETWEEN THE CHARGER TERMINALS AND THE RECTIFIER CIRCUIT WHICH INCLUDES A BI-STABLE SWITCHING RELAY OPERABLE TO ESTABLISH THE CONNECTION OF THE TERMINALS OF THE CHARGER AND BATTERY RESPECTIVELY AT THE PROPER POLARITY REGARDLESS OF THE POLARITY OF THE INITIAL CONNECTION THEREOF WITHOUT REQUIRING ANY EXTERNAL POWER SOURCE.
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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |