US3986038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequencer unit
Assignee: GIBSON BATTLE AND CO Ltd
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Filing: 1975-04-02
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Granted: 1976-10-12
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Expires: 1995-04-02
Abstract
Abstract An automatic control system for a plurality of engine-driven alternator units arranged to supply a common electrical distribution system, the system monitoring the level of the load on each generating set so that a load analogue signal corresponds to the proportion of its load that its alternator is producing.
Inventors
- 👤 David J. Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:58
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/46; H02J3/466
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
197 words
Control apparatus for energizing an electrical distribution system from a plurality of separately engine-driven alternators, at least one of the alternators serving as a base alternator initially energizing the distribution system, said control apparatus comprising a plurality of control units, one control unit associated with each alternator, and each control unit comprising: a. monitoring means for monitoring the electrical power being delivered by the associated alternator to the distribution system; b. analogue circuit means representing the capacity of the associated alternator by a suitable analogue; c. interconnecting means for interconnecting the analogue circuit means of each control unit into a composite analogue system whenever the associated alternator is connected into the distribution system at any time, affording a composite analogue system continuously representative of the capacity of those alternators which are actually in operation, d. and comparison means, comparing the load upon the associated alternator unit with the composite analogue system, for initiating starting of the next alternator when the load on the associated alternator exceeds a set proportion of its capacity, and for initiating removal of an alternator when such removal will leave the remaining alternators carrying a load of a set proportion of their capacity.
Claim 2
Dependent Claim
197 words
Control apparatus for energizing an electrical distribution system from a plurality of separately engine-driven alternators, at least one of the alternators serving as a base alternator initially energizing the distribution system, said control apparatus comprising a plurality of control units, one control unit associated with each alternator, and each control unit comprising: a. monitoring means for monitoring the electrical power being delivered by the associated alternator to the distribution system; b. analogue circuit means representing the capacity of the associated alternator by a suitable analogue; c. interconnecting means for interconnecting the analogue circuit means of each control unit into a composite analogue system whenever the associated alternator is connected into the distribution system at any time, affording a composite analogue system continuously representative of the capacity of those alternators which are actually in operation, d. and comparison means, comparing the load upon the associated alternator unit with the composite analogue system, for initiating starting of the next alternator when the load on the associated alternator exceeds a set proportion of its capacity, and for initiating removal of an alternator when such removal will leave the remaining alternators carrying a load of a set proportion of their capacity.
Claim 3
Dependent Claim
28 words
A control apparatus as defined in claim 1, wherein each analogue circuit means comprises a variable resistor which is adjustable to represent the capacity of the associated alternator.
Claim 4
Dependent Claim
30 words
A control apparatus as defined in claim 1, wherein each comparison means comprises a differential amplifier actuating a relay to connect or remove the associated alternator from the distribution system.
Claim 5
Dependent Claim
67 words
A control apparatus as defined in claim 2 wherein the interconnecting means comprises switch means to connect the analogue resistors in series as each alternator is connected to the distribution system, the analogue resistors thus producing a total resistance proportional to the total capacity of the alternators in operation, so that the signal produced by the analogues is proportional to the capacity of the alternators in operation.
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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |