US3740926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electronic precipitator
Assignee: FIRST SAVINGS LEASING Corp A CORP OF WI
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Filing: 1970-12-15
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Granted: 1973-06-26
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Expires: 1990-12-15
Abstract
Abstract A two-stage type electrostatic precipitator mechanism is carried within a rectangular cabinet having an air intake at one end and an air outlet at the other. A blower mechanism is carried within the cabinet for moving air through the cabinet and past the ionizing wires and collecting plates of the precipitator mechanism. A power supply circuit provides high voltages for the ionizing wires and collecting plates and an indicator lamp is connected in circuit with such power supply circuit for providing an alarm signal when the collecting plates become too dirty. The spacing between the collecting plates and the value of the high voltage supplied thereto are of an unconventional nature and provide improved operating performance. The precipitator unit as a whole is constructed so that it can be operated in either a normal or an upside-down position.
Inventors
- 👤 T Duval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:26
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
323 words
A portable electronic precipitator for cleaning the air in a room or other relatively enclosed environment frequented by human beings comprising: a rectangular cabinet having top, bottom, front and back panels and an air intake at one end and an air outlet at the opposite end; blower means carried within the cabinet for moving air from the intake to the outlet; precipitator means carried within the cabinet and including a group of spaced electrically conductive elements located in the air flow path for removing airborne particles from the air; and, power supply means carried within the cabinet for producing a substantial electrical potential difference between different ones of the conductive elements; the blower means, precipitator means and power supply means being mounted within the cabinet so that the precipitator can be operated either with the top panel on top and the bottom panel on bottom or vice versa; first mounting means secured to the top panel and second mounting means secured to the bottom panel of thE cabinet so that the cabinet may be mounted either with the top panel up and the bottom panel down or vice versa; indicator means connected in the circuit with the power supply means for providing an alarm signal when the conductive elements become too dirty for desired operational efficiency; said front panel including a hinged door for providing access to the interior of the unit, the direction in which said front panel faces being capable of being made constant as the direction of air flow is reversed by reversing the one said mounting means used for mounting said precipitator; and a panel plate mounting the controls for said precipitator and releasably secured to a fixed portion of said front panel whereby as the mounting is changed from one of said mounting means to the other, the panel plate means can be rotated 180* to maintain the printed legends on the plate in a non inverted condition.
Claim 2
Dependent Claim
323 words
A portable electronic precipitator for cleaning the air in a room or other relatively enclosed environment frequented by human beings comprising: a rectangular cabinet having top, bottom, front and back panels and an air intake at one end and an air outlet at the opposite end; blower means carried within the cabinet for moving air from the intake to the outlet; precipitator means carried within the cabinet and including a group of spaced electrically conductive elements located in the air flow path for removing airborne particles from the air; and, power supply means carried within the cabinet for producing a substantial electrical potential difference between different ones of the conductive elements; the blower means, precipitator means and power supply means being mounted within the cabinet so that the precipitator can be operated either with the top panel on top and the bottom panel on bottom or vice versa; first mounting means secured to the top panel and second mounting means secured to the bottom panel of thE cabinet so that the cabinet may be mounted either with the top panel up and the bottom panel down or vice versa; indicator means connected in the circuit with the power supply means for providing an alarm signal when the conductive elements become too dirty for desired operational efficiency; said front panel including a hinged door for providing access to the interior of the unit, the direction in which said front panel faces being capable of being made constant as the direction of air flow is reversed by reversing the one said mounting means used for mounting said precipitator; and a panel plate mounting the controls for said precipitator and releasably secured to a fixed portion of said front panel whereby as the mounting is changed from one of said mounting means to the other, the panel plate means can be rotated 180* to maintain the printed legends on the plate in a non inverted condition.
Claim 3
Dependent Claim
28 words
A portable electronic percipitator in accordance with claim 1 wherein the indicator means is constructed and connected to sense the leakage current passing between the electrically conductive elements.
Claim 4
Dependent Claim
64 words
A portable electronic precipitator in accordance with claim 1 wherein the power supply means includes a step-up transformer and rectifier circuit means coupled to the secondary thereof for supplying a relatively large unidirectional voltage to some of the electrically conductive elements and wherein the indicator means includes a current sensing means connected in series with the transformer secondary winding and the rectifier circuit means.
Claim 5
Dependent Claim
32 words
A portable electronic precipitator in accordance with claim 3 wherein the current sensing means includes an indicator lamp for providing a visual alarm signal when the electrically conductive elements become too dirty.
Claim 6
Dependent Claim
50 words
A portable electronic precipitator in accordance with claim 3 wherein the current sensing means includes a current sensing resistor connected in series with the transformer secondary winding and the rectifier circuit means and further includes an indicator lamp and current limiting resistor connected in series across the current sensing resistor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |