US4052177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitator arrangements
Assignee: Nea-Lindberg AS
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Filing: 1976-03-01
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Granted: 1977-10-04
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Expires: 1996-03-01
Abstract
Abstract An electrostatic precipitator arrangement comprises an oscillating circuit in which the precipitator is included as a capacitor, the circuit also including a storage capacitor and pulse initiating means, such as a thyristor or a spark gap, for causing the energy stored in the storage capacitor to oscillate from that capacitor to the precipitator and then through a diode or other electric valve means having the opposite direction of conduction back to the storage capacitor.
Inventors
- 👤 Leif Kide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
An electrostatic precipitator circuit, comprising: a voltage source for generating a unidirectional voltage; precipitator electrodes constituting a capacitor and responsive to said inidirectional voltage; a pulse generator including a storage capacitor for generating pulses; inductance means intercoupled between said storage capacitor and said precipitator electrode capacitor for transferring said pulses to said precipitator electrodes in superimposed relationship to said unidirectional voltage; said storage capacitor, inductance means and said precipitator electrode capacitor forming a controllable LC oscillating circuit; and non-linear electric means for controlling said LC oscillating circuit to enable the energy stored in said precipitator electrode capacitor during each pulse transferred thereto to return to said storage capacitor for renewed storage therein.
Claim 2
Dependent Claim
112 words
An electrostatic precipitator circuit, comprising: a voltage source for generating a unidirectional voltage; precipitator electrodes constituting a capacitor and responsive to said inidirectional voltage; a pulse generator including a storage capacitor for generating pulses; inductance means intercoupled between said storage capacitor and said precipitator electrode capacitor for transferring said pulses to said precipitator electrodes in superimposed relationship to said unidirectional voltage; said storage capacitor, inductance means and said precipitator electrode capacitor forming a controllable LC oscillating circuit; and non-linear electric means for controlling said LC oscillating circuit to enable the energy stored in said precipitator electrode capacitor during each pulse transferred thereto to return to said storage capacitor for renewed storage therein.
Claim 3
Dependent Claim
32 words
An electrostatic precipitator circuit as in claim 1 wherein said inductance means includes a pulse transformer having a self-inductance forming at least a part of the self-induction of said LC oscillating circuit.
Claim 4
Dependent Claim
29 words
An electrostatic precipitator circuit as in claim 2 further comprising a charging circuit connected to said voltage source and wherein said storage capacitor forms part of said charging circuit.
Claim 5
Dependent Claim
52 words
An electrostatic precipitator circuit as in claim 2 further comprising an additional voltage source for providing an additional unidirectional voltage, and a charging circuit, said storage capacitor forming part of said charging circuit and said additional unidirectional voltage being supplied thereto independently of said unidirectional voltage from said first mentioned voltage source.
Claim 6
Dependent Claim
49 words
An electrostatic precipitator circuit as in claim 1 wherein said inductance means includes a series connection of self-induction coils, some of said coils being connected in series in the energy supply to the precipitator and the remaining coils being shunted by said non-linear electric elements and said storage capacitor.
Claim 7
Dependent Claim
29 words
An electrostatic precipitator circuit as in claim 5 further comprising a charging circuit connected to said voltage source, and wherein said storage capacitor forms part of said charging circuit.
Claim 8
Dependent Claim
52 words
An electrostatic precipitator circuit as in claim 5 further comprising an additional voltage source for providing an additional unidirectional voltage, and a charging circuit, said storage capacitor forming part of said charging circuit and said additional unidirectional voltage being supplied thereto independently of said unidirectional voltage from said first mentioned voltage source.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |