US3900783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging circuit
Assignee: General Electric Co
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Filing: 1974-04-08
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Granted: 1975-08-19
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Expires: 1994-04-08
Abstract
Abstract A circuit for charging a battery used as a power source for an emergency lighting system. The circuit is connected to the battery by a three connector plug-socket unit. First and second leads connect the circuit to an A.C. power source. A first rectifier is connected between the first lead and a first plug connector. A first socket connector is connected to the battery and is adapted to receive the first plug connector for connecting the charging circuit to one side of the battery. A current limiting resistor is connected to the other side of the battery and may be physically coupled to the battery case. A thermal responsive switch is connected across the current limiting resistor for changing the charging current level of the battery as a function of the battery temperature. A second socket connector is connected to the current limiting resistor and is adapted to receive a second plug connector. The second plug connector is connected to the second lead. An inverter circuit for operating a gaseous discharge lamp is connected to third and fourth leads. The third lead is connected to the first plug connector and the fourth lead is connected to a third plug connector. The third plug connector is adapted to be connected to a third socket connector which is connected to the other side of the battery. A lamp for indicating the proper connector mating in the plug-socket unit is connected in series with a second rectifier. This series combination is connected between the first and fourth leads.
Inventors
- 👤 Rollie R Herzog
- 👤 Robert P Alley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:30
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/062; H02J9/065; H02J7/00; H02J7/90; H02J7/971; H02J7/975; H02J7/977; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/20; Y10S320/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
216 words
A battery charging circuit comprising: first and second leads for connection to an A.C. source; a first rectifier connected to said first lead and arranged for connection to one side of the battery for providing unidirectional charging current for the battery; said second lead arranged for connection to the other side of the battery; third and fourth leads for connection to a load; a two-part, selectively-severable junction device having a first section and a second section; said first section including first, second and third connectors, said first rectifier and said third lead connected to said first connector, said second lead connected to said second connector, said fourth lead connected to said third connector; said second section being connected to the battery and having fourth, fifth and sixth connectors for mating respectively with the first, second and third connectors; said fourth connector connected to the one side of the battery, said fifth and sixth connectors connected to the other side of the battery; indication means and a second rectifier connected in a series circuit relationship; between said fourth lead and said first lead, said indication means providing an indication when one of said second and fourth leads is not electrically connected to the other side of the battery and providing an indication of charging of the battery.
Claim 2
Dependent Claim
216 words
A battery charging circuit comprising: first and second leads for connection to an A.C. source; a first rectifier connected to said first lead and arranged for connection to one side of the battery for providing unidirectional charging current for the battery; said second lead arranged for connection to the other side of the battery; third and fourth leads for connection to a load; a two-part, selectively-severable junction device having a first section and a second section; said first section including first, second and third connectors, said first rectifier and said third lead connected to said first connector, said second lead connected to said second connector, said fourth lead connected to said third connector; said second section being connected to the battery and having fourth, fifth and sixth connectors for mating respectively with the first, second and third connectors; said fourth connector connected to the one side of the battery, said fifth and sixth connectors connected to the other side of the battery; indication means and a second rectifier connected in a series circuit relationship; between said fourth lead and said first lead, said indication means providing an indication when one of said second and fourth leads is not electrically connected to the other side of the battery and providing an indication of charging of the battery.
Claim 3
Dependent Claim
32 words
A battery charging circuit as set forth in claim 1 further including a thermal responsive charging current control means connected in a circuit relation with said battery and said device second section.
Claim 4
Dependent Claim
34 words
A battery charging circuit as set forth in claim 2 wherein said thermal responsive charging current control means includes a resistance means connected between the other side of said battery and said fifth connector.
Claim 5
Dependent Claim
40 words
A battery charging circuit as set forth in claim 3 wherein said thermal responsive charging current control means further includes a thermal responsive switch connected to said resistance means for reducing charging current for battery temperature reaches a predetermined level.
Claim 6
Dependent Claim
38 words
A battery charging circuit as set forth in claim 4 wherein said resistance means and said switch means are in close physical proximity with said battery for heating said battery when the temperature falls below a predetermined level.
Claim 7
Dependent Claim
106 words
A battery charging circuit comprising: first, second and third Connectors for connecting said circuit to the battery; first and second leads for connecting said circuit to an A.C. source; third and fourth leads for connecting the battery to a load; a first rectifier connected between said first lead and said first connector for providing charging current for the battery during one A.C. half cycle; said second lead connected to said second connector; said third lead connected to said first connector; said fourth lead connected to said third connector; indication means connected between said fourth lead and said first lead for indicating the charging of the battery.
Claim 8
Dependent Claim
106 words
A battery charging circuit comprising: first, second and third Connectors for connecting said circuit to the battery; first and second leads for connecting said circuit to an A.C. source; third and fourth leads for connecting the battery to a load; a first rectifier connected between said first lead and said first connector for providing charging current for the battery during one A.C. half cycle; said second lead connected to said second connector; said third lead connected to said first connector; said fourth lead connected to said third connector; indication means connected between said fourth lead and said first lead for indicating the charging of the battery.
Claim 9
Dependent Claim
33 words
A battery charging circuit as set forth in claim 6 further including a second rectifier connected in series with said indication means for providing a current path during the other A.C. half cycle.
Claim 10
Dependent Claim
44 words
A battery charging circuit as set forth in claim 6 wherein said first, second and third connectors are contained in a plug-socket unit including a plug and a socket, whereby said indication means will indicate that said plug is electrically connected to said socket.
Claim 11
Dependent Claim
41 words
A battery charging circuit as set forth in claim 7 further including a thermal responsive current limiting means connected between said second connector and the battery for providing a predetermined current to the battery in response to predetermined battery temperature range.
Claim 12
Dependent Claim
183 words
A circuit including a charging circuit and a battery, comprising: first and second leads for connecting said charging circuit to an A.C. source; a plug-socket unit including first, second and third plug connectors and first, second and third socket connectors for connecting said charging circuit to said battery; third and fourth leads for connecting said charging circuit to a gaseous discharge lamp; said third lead connected to said first plug connector and said fourth lead connected to said third plug connector; said second lead connected to said second plug connector; a first rectifier connected between said first lead and said first plug connector; a second rectifier connected in a series relationship with an indicating means; said series relationship connected between said first lead and said fourth lead; said battery having one side connected to said first socket connector and the other side connected to said third socket connector; resistance means connected between said other side of said battery and said second socket connector; said resistance means being connected in physical contact with said battery; a thermal responsive switch connected across said resistance means.
Claim 13
Dependent Claim
183 words
A circuit including a charging circuit and a battery, comprising: first and second leads for connecting said charging circuit to an A.C. source; a plug-socket unit including first, second and third plug connectors and first, second and third socket connectors for connecting said charging circuit to said battery; third and fourth leads for connecting said charging circuit to a gaseous discharge lamp; said third lead connected to said first plug connector and said fourth lead connected to said third plug connector; said second lead connected to said second plug connector; a first rectifier connected between said first lead and said first plug connector; a second rectifier connected in a series relationship with an indicating means; said series relationship connected between said first lead and said fourth lead; said battery having one side connected to said first socket connector and the other side connected to said third socket connector; resistance means connected between said other side of said battery and said second socket connector; said resistance means being connected in physical contact with said battery; a thermal responsive switch connected across said resistance means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |