US3784902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sensing particulate matter
Assignee: IKOR Inc
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Filing: 1971-12-08
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Granted: 1974-01-08
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Expires: 1991-12-08
Abstract
Abstract Apparatus for sensing particulate matter in a gas stream and having a sampling probe tube with a Pitot tube for measuring the velocity of the gas stream. A Venturi arrangement is provided inside the probe tube for measuring the velocity of the sample stream taken by the probe, so that the two velocities can be matched to provide isokinetic sampling. The sensor used is a pair of coaxial electrodes and the sensor includes an arrangement for mixing air into the sample stream adjacent the electrodes to minimize deposition of the particulate matter from stagnant volumes of gas.
Inventors
- 👤 H Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N1/2258; G01N1/2202; G01N2001/222; G01N2001/2223; G01N2001/225; G01N2001/2261
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
Apparatus for sensing particulate matter in a gas flow, said apparatus comprising in combination a pair of spaced-apart electrodes, one of said electrodes being an elongated hollow cylinder and the other of said electrodes is an elongated element disposed coaxially within said cylinder, means for flowing at least a portion of said flow between and in contact with said electrodes, an elongated support member extending from said element through an aperture in a wall of said cylinder; a tube disposed coaxially around said support member and having its periphery sealed to the edges of said aperture, an insulating cone extending between the inner wall of said tube and said support member and being coaxial therewith, the apex of said cone being directed toward said aperture; and a plurality of apertures through the wall of said tube for providing pneumatic communication between the outside of said tube and the interspace between said cone and said inner wall of said tube.
Claim 2
Dependent Claim
159 words
Apparatus for sensing particulate matter in a gas flow, said apparatus comprising in combination a pair of spaced-apart electrodes, one of said electrodes being an elongated hollow cylinder and the other of said electrodes is an elongated element disposed coaxially within said cylinder, means for flowing at least a portion of said flow between and in contact with said electrodes, an elongated support member extending from said element through an aperture in a wall of said cylinder; a tube disposed coaxially around said support member and having its periphery sealed to the edges of said aperture, an insulating cone extending between the inner wall of said tube and said support member and being coaxial therewith, the apex of said cone being directed toward said aperture; and a plurality of apertures through the wall of said tube for providing pneumatic communication between the outside of said tube and the interspace between said cone and said inner wall of said tube.
Claim 3
Dependent Claim
19 words
Apparatus as defined in claim 1 including filter means disposed to trap particulate matter in gas entering said apertures.
References Cited (Backward Citations)
US3258634A
Cited
US3408866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |