US3767994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for rapid charging of storage batteries
Assignee: VARTA AG
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Filing: 1972-04-03
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Granted: 1973-10-23
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Expires: 1992-04-03
Abstract
Abstract A circuit arrangement for the rapid charging of a storage battery having a positive polarity terminal and a negative polarity terminal with a pulsating current and with a discharge circuit has a power input and at least one switch connected between the power input and the storage battery. A discriminator element is connected to the storage battery for sensing the voltage of the storage battery during the pauses in the current flow and for controlling the switch via the discriminator element. The discriminator element is connected across the storage battery. The discriminator element comprises first and second transistors each having emitter, collector and base electrodes. The base electrode of the first transistor is connected to the collector electrode of the second transistor. The emitter electrode of the first transistor is connected to the base electrode of the second transistor. A first resistor is connected in series circuit arrangement with a potentiometer between the emitter electrode of the second transistor and the negative polarity terminal of the storage battery. At least one circuit is connected between the first resistor and the input side of the switch and includes a first diode and a second resistor.
Inventors
- 👤 W Dittmar
- 👤 J Lambrette
- 👤 H Schatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:25
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/96
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
217 words
A circuit arrangement for the rapid charging of a storage battery having a positive polarity terminal and a negative polarity terminal with a pulsating current and with a discharge circuit, having a power input, a potentiometer having a tap electrode, a first resistor connected in series with the potentiometer to the negative polarity terminal of the storage battery, and at least one switch connected between the power input and the storage battery and a discriminator element connected to the storage battery for sensing the voltage of the storage battery during the pauses in the current flow and for controlling said switch via said discriminator element, said discriminator element being connected between the tap electrode of the potentiometer and the positive polarity terminal of the storage battery and comprising first and second transistors each having emitter, collector and base electrodes, the base electrode of the first transistor being connected to the collector electrode of the second transistor, the emitter electrode of the first transistor being connected to the base electrode of the second transistor and the emitter electrode of the second transistor being connected to the tap electrode of the potentiometer, and at least one circuit connected between the first resistor and the input side of the switch, said circuit including a first diode and a second resistor.
Claim 2
Dependent Claim
217 words
A circuit arrangement for the rapid charging of a storage battery having a positive polarity terminal and a negative polarity terminal with a pulsating current and with a discharge circuit, having a power input, a potentiometer having a tap electrode, a first resistor connected in series with the potentiometer to the negative polarity terminal of the storage battery, and at least one switch connected between the power input and the storage battery and a discriminator element connected to the storage battery for sensing the voltage of the storage battery during the pauses in the current flow and for controlling said switch via said discriminator element, said discriminator element being connected between the tap electrode of the potentiometer and the positive polarity terminal of the storage battery and comprising first and second transistors each having emitter, collector and base electrodes, the base electrode of the first transistor being connected to the collector electrode of the second transistor, the emitter electrode of the first transistor being connected to the base electrode of the second transistor and the emitter electrode of the second transistor being connected to the tap electrode of the potentiometer, and at least one circuit connected between the first resistor and the input side of the switch, said circuit including a first diode and a second resistor.
Claim 3
Dependent Claim
16 words
A circuit arrangement as claimed in claim 1, wherein the switch is a silicon controlled rectifier.
Claim 4
Dependent Claim
59 words
A circuit arrangement as claimed in claim 2, further comprising a third transistor having emitter, collector and base electrodes, and wherein the silicon controlled rectifier has a control electrode connected to the emitter electrode of the third transistor, the base electrode of the third transistor being connected to the collector Electrode of the first transistor of the discriminator element.
Claim 5
Dependent Claim
50 words
A circuit arrangement as claimed in claim 3, further comprising a second diode and a third resistor connected in series circuit arrangement with the second diode, and wherein the silicon controlled rectifier has an anode connected to the control electrode of the silicon controlled rectifier via said series circuit arrangement.
Claim 6
Dependent Claim
30 words
A circuit arrangement as claimed in claim 4, further comprising a first capacitor connected between the collector electrode of the first transistor and the emitter electrode of the second transistor.
Claim 7
Dependent Claim
43 words
A circuit arrangement as claimed in claim 5, further comprising a third diode and a fourth resistor connected in series circuit arrangement with the third diode, said series circuit arrangement being connected in parallel with the anode-cathode path of the silicon controlled rectifier.
Claim 8
Dependent Claim
27 words
A circuit arrangement as claimed in claim 6, further comprising a second switch connected between the power input and the positive polarity terminal of the storage battery.
Claim 9
Dependent Claim
31 words
A circuit arrangement as claimed in claim 7, wherein the second switch comprises a second silicon controlled rectifier having a control electrode connected to the emitter electrode of the third transistor.
Claim 10
Dependent Claim
36 words
A circuit arrangement as claimed in claim 8, wherein a discharge circuit is connected in parallel with the storage battery and comprises a second capacitor and a third silicon controlled rectifier connected in series circuit arrangement.
Claim 11
Dependent Claim
61 words
A circuit arrangement as claimed in claim 9, further comprising a fourth transistor having emitter, collector and base electrodes and a second potentiometer having a tap, and wherein the third silicon controlled rectifier has an anode-cathode path connected in parallel with the fourth transistor, and the base electrode of the fourth transistor is connected to the tap of the second potentiometer.
Claim 12
Dependent Claim
48 words
A circuit arrangement as claimed in claim 10, further comprising a fourth diode and a fifth resistor connected in series circuit arrangement with the fourth diode, and wherein the silicon controlled rectifier has an anode connected to the cathode of the first diode via said series circuit arrangement.
Claim 13
Dependent Claim
18 words
A circuit arrangement as claimed in claim 11, further comprising a pushbutton switch connected across the first capacitor.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |