US3849090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitator
Assignee: W C Wood Co Ltd
•
Filing: 1973-04-13
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Granted: 1974-11-19
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Expires: 1993-04-13
Abstract
Abstract An electrostatic precipitator is modified so that the amount of energy that is dissipated when an arc-over occurs between any two adjacent collector plates thereof is reduced. The positive collector plates of the electrostatic precipitator are connected to a positive bus bar by means of resistors. These resistors preferably are in the form of a resistive cement. When an arcover occurs between two adjacent collector plates, the resistors prevent the charges on the other capacitors constituted by other adjacent collector plate pairs from being dissipated via the arcover.
Inventors
- 👤 C Remick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:54
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/72; B03C3/66; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
334 words
In an electrostatic precipitator an improved arrangement for supporting and electrically connecting the collector plates thereof comprising two spaced apart printed circuit boards, a plurality of collector plates stacked in spaced apart relationship one above the other and extending between said printed circuit boards and supported thereby, said printed circuit boards having a plurality of slots extending therethrough, said collector plates having tabs extending therefrom, said tabs extending into said slots, at least two bus bars adapted for connection to two terminals of a DC power supply at different DC potentials, one of said bus bars being on one of said printed circuit boards and the other of said bus bars also being on one of said printed circuit boards, every other one of said collector plates being electrically connected via at least certain of said tabs thereof to said one bus bar, a plurality of isolating resistors, said isolating resistors being electrically connected between said other bus bar and the remaining ones of said collector plates and being of sufficient magnitude, upon occurrence of an arc-over between two adjacent ones of said collector plates, to inhibit discharge of the capacitors constituted by other adjacent pairs of collector plates via said arc-over, said isolating resistors being constituted by electrically resistive, resilient cement adhered to said printed circuit board carrying said other bus bar and electrically connecting said remaining ones of said collector plates via at least certain of said tabs thereof to said other bus bar, said certain tabs of said remaining collector plates extending through certain of said slots that are physically spaced apart from said other bus bar, whereby said electrically resistive, resilient cement bridges the spaces between said certain tabs of said remaining collector plates and said other bus bar, said electrically resistive, resilient cement also being adhered to said certain of said tabs of said remaining ones of said collector plates and extending over the slots through which the last-mentioned tabs extend and thereby inhibiting rattling of said last-mentioned tabs.
Claim 2
Dependent Claim
334 words
In an electrostatic precipitator an improved arrangement for supporting and electrically connecting the collector plates thereof comprising two spaced apart printed circuit boards, a plurality of collector plates stacked in spaced apart relationship one above the other and extending between said printed circuit boards and supported thereby, said printed circuit boards having a plurality of slots extending therethrough, said collector plates having tabs extending therefrom, said tabs extending into said slots, at least two bus bars adapted for connection to two terminals of a DC power supply at different DC potentials, one of said bus bars being on one of said printed circuit boards and the other of said bus bars also being on one of said printed circuit boards, every other one of said collector plates being electrically connected via at least certain of said tabs thereof to said one bus bar, a plurality of isolating resistors, said isolating resistors being electrically connected between said other bus bar and the remaining ones of said collector plates and being of sufficient magnitude, upon occurrence of an arc-over between two adjacent ones of said collector plates, to inhibit discharge of the capacitors constituted by other adjacent pairs of collector plates via said arc-over, said isolating resistors being constituted by electrically resistive, resilient cement adhered to said printed circuit board carrying said other bus bar and electrically connecting said remaining ones of said collector plates via at least certain of said tabs thereof to said other bus bar, said certain tabs of said remaining collector plates extending through certain of said slots that are physically spaced apart from said other bus bar, whereby said electrically resistive, resilient cement bridges the spaces between said certain tabs of said remaining collector plates and said other bus bar, said electrically resistive, resilient cement also being adhered to said certain of said tabs of said remaining ones of said collector plates and extending over the slots through which the last-mentioned tabs extend and thereby inhibiting rattling of said last-mentioned tabs.
Claim 3
Dependent Claim
81 words
An electrostatic precipitator as claimed in claim 1 wherein the ones of said collector plates electrically connected to said one bus bar are electrically connected thereto via electrically conductive resilient cement adhered to said printed circuit board carrying said one bus bar and also adhered to said certain of said tabs of the last-mentioned collector plates and extending over the slots through which said certain of said tabs of the last-mentioned collector plates extend and thereby inhibiting rattling of these tabs.
Claim 4
Dependent Claim
31 words
An electrostatic precipitator as claimed in claim 2 wherein the slots through which said certain of said tabs of the last-mentioned collector plates extend also pass through said one bus bar.
Claim 5
Dependent Claim
77 words
An electrostatic precipitator as claimed in claim 2 wherein said collector plates have additional tabs other than said certain tabs, said additional tabs being electrically disconnected from said bus bars, and electrically insulating resilient cement adhered to said additional tabs, extending over the slots through which said additional tabs extend and also adhered to the portions of said printed circuit boards surrounding the slots through which said additional tabs extend to inhibit rattling of said additional tabs.
Claim 6
Dependent Claim
62 words
An electrostatic precipitator as claimed in claim 4 wherein said bus bars are both on the same printed circuit board, said additional tabs and the slots through which said additional tabs extend are located between said bus bars and said electrically insulating resilient ceMent is adhered to the portion of said same printed circuit board that is located between said bus bars.
Claim 7
Dependent Claim
30 words
An electrostatic precipitator according to claim 5 wherein said electrically insulating resilient cement also is coated over and adhered to said electrically conductive resilient and said electrically resistive resilient cements.
Claim 8
Dependent Claim
82 words
An electrostatic precipitator as claimed in claim 4 wherein there are two of said one bus bars and two of said other bus bars, one of each being located on each of said printed circuit boards, said additional tabs and the slots through which said additional tabs extend being located between the bus bars on the respective printed circuit boards and said electrically insulating resilient cement being adhered to the portions of said printed circuit boards located between said bus bars thereon.
Claim 9
Dependent Claim
31 words
An electrostatic precipitator as claimed in claim 7 wherein said electrically insulating resilient cement also is coated over and adhered to said electrically conductive resilient and said electrically resistive resilient cements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |