Patent US3727074A successfully refreshed from Google Patents.
US3727074A
Expired / Lapsed
US
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Switching arrangement responsive to electrical charge
Assignee: Robert Bosch GmbH
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Filing: 1971-08-13
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Granted: 1973-04-10
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Expires: 1991-08-13
Abstract
Abstract An arrangement for generating an electrical switching process when a predetermined quantity of electrical charge has passed through an electrical conductor. A resistor used as a measuring element is connected in series with the electrical conductor, and the voltage appearing across the resistor is applied to an integrator. The switching device in the form of a trigger circuit provides a trigger signal when the output voltage from the integrator has attained a predetermined threshold magnitude. This threshold magnitude is selectable in correspondence to a predetermined and selected quantity of electrical charge to be passed through the electrical conductor. The trigger signal is also used to clear the integrator circuit.
Inventors
- 👤 H Keller
- 👤 H Gschwendtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:27
CPC Classifications
H; H03; H03M; H03M1/00; G; G01; G01R; G01R21/00; G01R21/133; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186; G06G7/1865; H02; H02J; H02J7/00; H02J7/90; H02J7/94; H03M1/10; H03M1/1009
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
An arrangement for monitoring the flow of charge through an electrical conductor, comprising, in combination, resistor means connected in series with said electrical conductor; resettable integration means having an input connected across said resistor means and having an output, and being operative for furnishing at said output an electrical signal having a magnitude proportional to the time integral of the voltage across said resistor means, and being resettable upon receipt of a reset signal; Schmitt trigger means connected to said output of said integration means and operative for generating a monitoring signal when the magnitude of said electrical signal reaches a predetermined value; and monostable multivibrator means having an input connected to the output of said Schmitt trigger means and having an output connected to Said integration means, and operative for furnishing to said integration means a reset signal in response to generation of said monitoring signal.
Claim 2
Dependent Claim
147 words
An arrangement for monitoring the flow of charge through an electrical conductor, comprising, in combination, resistor means connected in series with said electrical conductor; resettable integration means having an input connected across said resistor means and having an output, and being operative for furnishing at said output an electrical signal having a magnitude proportional to the time integral of the voltage across said resistor means, and being resettable upon receipt of a reset signal; Schmitt trigger means connected to said output of said integration means and operative for generating a monitoring signal when the magnitude of said electrical signal reaches a predetermined value; and monostable multivibrator means having an input connected to the output of said Schmitt trigger means and having an output connected to Said integration means, and operative for furnishing to said integration means a reset signal in response to generation of said monitoring signal.
Claim 3
Dependent Claim
64 words
The arrangement as defined in claim 1, wherein said integration means comprises an operational amplifier having two inputs a feedback capacitor connected to the output of said operational amplifier and to one input of said amplifier, and at least one resistor connected in series with one input of said amplifier and being also connected to said resistor means in series with said electrical conductor.
Claim 4
Dependent Claim
15 words
The arrangement as defined in claim 1, wherein said reset signal is a control pulse.
Claim 5
Dependent Claim
42 words
The arrangement as defined in claim 1, including fuel cell means connected in series with said resistor means; and fuel metering means for metering fuel to said fuel cell means, said fuel metering means being controlled in dependence on said monitoring signal.
Claim 6
Dependent Claim
66 words
The arrangement as defined in claim 4, including load circuit means connected in series with said resistor means; fuel reservoir means connected to said fuel metering means for supplying fuel to said fuel cell as metered by said metering means; and means connecting said Schmitt trigger means to said fuel metering means so that said fuel metering means is controlled in dependence upon said metering signal.
Claim 7
Dependent Claim
26 words
The arrangement as defined in claim 1, including counter means connected to said Schmitt trigger means and actuated in response to generation of said monitoring signal.
Claim 8
Dependent Claim
15 words
The arrangement as defined in claim 6, wherein said counter means comprises a digital counter.
Claim 9
Dependent Claim
35 words
The arrangement as defined in claim 6, wherein said counting means comprises a forward and reverse counter, the direction of counting by said counter being determined by the direction of current through said resistor means.
Claim 10
Dependent Claim
33 words
The arrangement as defined in claim 6, including an auxiliary switching means connected to said counting means and having an output when said counting means has advanced a predetermined number of counting steps.
Claim 11
Dependent Claim
22 words
The arrangement as defined in claim 6, wherein said counting means is a counter for indicating the measured quantity of electrical charge.
Claim 12
Dependent Claim
27 words
The arrangement as defined in claim 1, including storage battery means furnishing current to said resistor means for monitoring charging and discharging of said storage battery means.
Claim 13
Dependent Claim
68 words
The arrangement as defined in claim 11, including a selector switch connected to the terminals of said storage battery means; a load circuit connected to said selector switch and selectively connectable to said storage battery means in one state of said selector switch; and a charging circuit connected to said selector switch and selectively connectable to said storage battery means in the other state of said selector switch.
Claim 14
Dependent Claim
50 words
The arrangement as defined in claim 12, including counter means actuated by said signal from said switching means; and auxiliary switching means actuated by said counter means, said auxiliary switching means actuating said selector switch means when said counter means has advanced a predetermined quantity in a predetermined counting direction.
Claim 15
Dependent Claim
26 words
The arrangement as defined in claim 12, including means for varying said predetermined value when said auxiliary switching means has been actuated by said counting means.
Claim 16
Dependent Claim
34 words
The arrangement as defined in claim 12, including means actuated by said auxiliary switching means for increasing the variation of said integration means when said auxiliary switching means is actuated by said counter means.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |