US4120672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapper assembly for electrostatic precipitators
Assignee: BELCO ACQUISITION CORP
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Filing: 1976-12-30
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Granted: 1978-10-17
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Expires: 1996-12-30
Abstract
Abstract An electrode rapper assembly for electrostatic precipitators which increases the life of switches used to energize the rapper and will not be damaged if improperly connected. The rapper assembly has a solenoid and two diode rectifiers, one being connected in parallel with the solenoid coil and the other in series with the coil.
Inventors
- 👤 Philip M. Lanese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/763; B03C3/765
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
An electrode rapper assembly for electrostatic precipitators comprising: a cylindrical cover; a coil within said cover and concentric therewith; an anvil rigidly connected with said cover; a ferro-magnetic plunger movably mounted within said coil and movable to strike said anvil; a first junction; a second junction, said coil being connected between said first and second junctions; a series solid state rectifier diode; a parallel solid state rectifier diode; a wire connecting one end of said parallel solid state rectifier diode with said first junction and another wire connecting the other end of said parallel rectifier diode to said second junction so as to be in parallel with said coil and permit current flow through said parallel rectifier diode so that it passes from said second junction through said parallel rectifier diode to said first junction; two conductors for supplying rectified A. C. current, one of said conductors being connected to one of said junctions, the other of said conductors being connected to one end of said series rectifier diode; and a wire connecting the other end of said series rectifier diode with the other of said junctions so that current passing through said series rectifier diode can pass only from said first junction to said second junction while passing through said coil; whereby energizing current can flow through said coil to generate a magnetic field and move said plunger upward and interruption of said energizing current will permit said plunger to drop, the current induced in said coil upon said interruption flowing through said second junction, said parallel rectifier, said first junction and said coil until dissipated.
Claim 2
Dependent Claim
267 words
An electrode rapper assembly for electrostatic precipitators comprising: a cylindrical cover; a coil within said cover and concentric therewith; an anvil rigidly connected with said cover; a ferro-magnetic plunger movably mounted within said coil and movable to strike said anvil; a first junction; a second junction, said coil being connected between said first and second junctions; a series solid state rectifier diode; a parallel solid state rectifier diode; a wire connecting one end of said parallel solid state rectifier diode with said first junction and another wire connecting the other end of said parallel rectifier diode to said second junction so as to be in parallel with said coil and permit current flow through said parallel rectifier diode so that it passes from said second junction through said parallel rectifier diode to said first junction; two conductors for supplying rectified A. C. current, one of said conductors being connected to one of said junctions, the other of said conductors being connected to one end of said series rectifier diode; and a wire connecting the other end of said series rectifier diode with the other of said junctions so that current passing through said series rectifier diode can pass only from said first junction to said second junction while passing through said coil; whereby energizing current can flow through said coil to generate a magnetic field and move said plunger upward and interruption of said energizing current will permit said plunger to drop, the current induced in said coil upon said interruption flowing through said second junction, said parallel rectifier, said first junction and said coil until dissipated.
Claim 3
Dependent Claim
22 words
The rapper assembly defined in claim 1 wherein each of said rectifiers is embedded in a plastic material within said rapper assembly.
Claim 4
Dependent Claim
30 words
The rapper assembly defined in claim 1 wherein said cover is of a ferro-magnetic material, and is closed at one end and the other end is closed by said anvil.
Claim 5
Dependent Claim
21 words
The rapper assembly as defined in claim 1 wherein said diodes are within said cover and located laterally of said plunger.
Claim 6
Dependent Claim
17 words
The rapper assembly defined in claim 4 wherein said diodes are adjacent to and below said coil.
References Cited (Backward Citations)
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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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |