Patent US3133239A successfully refreshed from Google Patents.
US3133239A
Expired / Lapsed
US
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Temperature compensated controlled relay
Assignee: Hertner Electric Co
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Filing: 1960-04-07
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Granted: 1964-05-12
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Expires: 1980-04-07
Abstract
No abstract record available.
Inventors
- 👤 James P Borges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:09
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/22; H01H47/26; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/975; H02J7/977; Y; Y10; Y10S; Y10S320/00; Y10S320/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A BATTERY CHARGING SYSTEM WHEREIN A BATTERY IS TO BE CHARGED FROM A D.C. POWER SUPPLY, THE VOLTAGE OF THE BATTERY BEING CHARGED DECREASING WITH TEMPERATURE INCREASE BUT INCREASING AS THE CHARGING CYCLE PROGRESSES, A CONTROL CIRCUIT CONNECTED TO AND SENSING THE VARYING VOLTAGE OF THE BATTERY WITH TIME AND TEMPERATURE TO ACTUATE THE POWER SUPPLY DURING THE CHARGING CYCLE COMPRISING; A RELAY COUPLED TO THE POWER SUPPLY INCLUDING CONTACTS CONTROLLED BY A COIL; A THERMISTOR AND A VARIABLE RESISTANCE IN A FIRST PARALLEL CIRCUIT FORMING A NEGATIVE TEMPERATURE COEFFICIENT RESISTANCE CIRCUIT COUPLED TO ONE END OF SAID COIL;
Claim 2
Dependent Claim
100 words
IN A BATTERY CHARGING SYSTEM WHEREIN A BATTERY IS TO BE CHARGED FROM A D.C. POWER SUPPLY, THE VOLTAGE OF THE BATTERY BEING CHARGED DECREASING WITH TEMPERATURE INCREASE BUT INCREASING AS THE CHARGING CYCLE PROGRESSES, A CONTROL CIRCUIT CONNECTED TO AND SENSING THE VARYING VOLTAGE OF THE BATTERY WITH TIME AND TEMPERATURE TO ACTUATE THE POWER SUPPLY DURING THE CHARGING CYCLE COMPRISING; A RELAY COUPLED TO THE POWER SUPPLY INCLUDING CONTACTS CONTROLLED BY A COIL; A THERMISTOR AND A VARIABLE RESISTANCE IN A FIRST PARALLEL CIRCUIT FORMING A NEGATIVE TEMPERATURE COEFFICIENT RESISTANCE CIRCUIT COUPLED TO ONE END OF SAID COIL;
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |