US3748831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for electric precipitator
Assignee: Svenska Flaktfabriken AB
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Filing: 1971-06-03
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Granted: 1973-07-31
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Expires: 1991-06-03
Abstract
Abstract A device for electric precipitators designed for horizontal gas flow and having plane precipitation electrodes in a number of rows parallel to the direction of gas flow and with emission electrodes situated between said rows, and equipped with an impact device for cleaning at specific intervals the precipitation electrodes, the rows of precipitation electrodes being situated between a number of transverse bars at different heights of the precipitator, said bars having guides opposite each row of precipitation electrodes, said electrodes in each row being linked together and the impact device being designed in known manner to strike against the rows of linked precipitation electrodes to displace them one after the other in the plane of each row.
Inventors
- 👤 S Maartmann
- 👤 S Lagerdahl
- 👤 K Mascord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:40
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
In an electric precipitator designed for horizontal flow of the gas to be cleaned, and having plane precipitation electrodes placed edge-to-edge in a number of rows parallel to the direction of flow of the gas through the electric precipitator, emission electrodes situated between the rows, and an impact device displacing said electrodes parallel to the flow direction for cleaning of the precipitation electrodes at specific intervals, the improvement wherein the precipitator has a number of transverse bars fixedly mounted at different heights extending perpendicular to the planes through the said rows of precipitation electrodes adjacent the entrance and exit ends of said rows, guides on each bar engaging the end electrodes in each row of precipitation electrodes to limit perpendicular movement thereof, and linking elements for the precipitation electrodes in each row linking the electrodes together in the direction of impact along the plane of each row.
Claim 2
Dependent Claim
147 words
In an electric precipitator designed for horizontal flow of the gas to be cleaned, and having plane precipitation electrodes placed edge-to-edge in a number of rows parallel to the direction of flow of the gas through the electric precipitator, emission electrodes situated between the rows, and an impact device displacing said electrodes parallel to the flow direction for cleaning of the precipitation electrodes at specific intervals, the improvement wherein the precipitator has a number of transverse bars fixedly mounted at different heights extending perpendicular to the planes through the said rows of precipitation electrodes adjacent the entrance and exit ends of said rows, guides on each bar engaging the end electrodes in each row of precipitation electrodes to limit perpendicular movement thereof, and linking elements for the precipitation electrodes in each row linking the electrodes together in the direction of impact along the plane of each row.
Claim 3
Dependent Claim
60 words
An improvement according to claim 1 wherein each precipitation electrode has a fore and rear side-edge partially bent back in the direction of flow of the gas for stiffening the electrode and a plane intermediAte portion, and said linking elements comprise tongues secured in a rear, bent-back side-edge and entering into a fore, bent-back side-edge of the next precipitation electrode.
Claim 4
Dependent Claim
44 words
An improvement according to claim 2, characterized in that each tongue has a bent-up lip to permit a limited reciprocal movement longitudinally but at the same time to limit said movement and thus prevent involuntary separation of two adjacent precipitation electrodes from one another.
Claim 5
Dependent Claim
75 words
An improvement according to claim 1, characterized in that said precipitation electrodes have fore and rear bent-back side-edges, and said guides and linking elements each comprise a continuous long and narrow, flat metal band passing both through the fore and rear bent-back side-edges of each precipitation electrodes, the band being at one end fixed to one of said bars and at the other end passing through the other of said bars in a clearance hole.
Claim 6
Dependent Claim
59 words
An improvement according to claim 4, characterized in that the band has a number of cut-outs or notches along one edge resting in the lower edge of the clearance hole, the which cut-outs or notches permit a limited reciprocal movement but at the same time limit said movement and prevent separation of two adjacent precipitation electrodes from one another.
Claim 7
Dependent Claim
107 words
An improvement according to claim 1, characterized in that said precipitation electrodes have fore and rear bent-back side-edges, and at least one of said linking elements comprises a -shaped strap attached to the rear bent-back side-edge and embracing the fore bent-back side-edge of the next precipitation electrode, and in that the bent-back side-edge at the entrance end and the bent-back side-edge at the exit end in each row -viewed in the direction of flow of the gas - are fixed lateraly to said bars by means of said guides, and wherein each of said guides comprises a -shaped or -shaped strap attached to its associated transverse bar.
Claim 8
Dependent Claim
35 words
An improvement according to claim 1 wherein the precipitator includes horizontal beams holding together the side walls of the electric precipitator and tie-rods which rigidly join each of said transverse bars to said horizontal beams.
Claim 9
Dependent Claim
59 words
An improvement according to claim 7 wherein the precipitator consists of a plurality of groups of electrode rows spaced-apart in the direction of flow, said beams being disposed in the space between said groups, each beam supporting both the exit-end transverse bar of the fore group and the entrance-end transverse bar of the rear group to join the same.
Claim 10
Dependent Claim
38 words
An improvement according to claim 1 wherein said linking elements are disposed at the same heights as the transverse bars to limit movement of each electrode in the row against movement perpendicular to the plane of said row.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |