US3592546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation nuclei detector
Assignee: ROBERT A GUSSMAN
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Filing: 1969-11-21
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Granted: 1971-07-13
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Expires: 1989-11-21
Abstract
Abstract A condensation nuclei particle detector is provided that is capable of continuous operation. An air sample possible containing nuclei is humidified and then passed to a contact chamber in which a water droplet is formed about each nuclei by introducing supercooled nuclei-free air into the chamber. The contact chamber has associated with it, (1) a porous, annular, outer chamber through which the supercooled air is radially introduced to the contact chamber to cause the supersaturation of the humid air, (2) optical or other means for indicating the nuclei concentration of the air sample, and (3) an exhaust port through which the sample exits.
Inventors
- 👤 Robert A Gussman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:14
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N15/065
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
A particle detector as defined in claim 1 and further comprising means for exhausting the supersaturated nuclei stream from said chamber.
Claim 2
Dependent Claim
21 words
A particle detector as defined in claim 1 wherein said humidifying means includes a tubular section integrally formed with said chamber.
Claim 3
Dependent Claim
26 words
A particle detector as defined in claim 3 wherein said tubular section includes a moistened felt liner substantially covering the inner surface of said tubular section.
Claim 4
Dependent Claim
25 words
A particle detector as defined in claim 1 wherein said generating means includes a filtering means to remove substantially all nuclei from said secondary airstream.
Claim 5
Dependent Claim
35 words
A particle detector as defined in claim 1 wherein said generating means includes a heat exchanger and means for expanding a coolant fluid into said heat exchanger, for causing the supercooling of said secondary airstream.
Claim 6
Dependent Claim
21 words
A particle detector as defined in claim 1 wherein said means for introducing said secondary airstream includes a porous wall portion.
Claim 7
Dependent Claim
40 words
A particle detector as defined in claim 7 wherein said contact chamber includes a tubular inner chamber and a concentric outer chamber, said porous wall portion being cylindrically shaped and forming the defining wall between said inner and outer chambers.
Claim 8
Dependent Claim
17 words
A particle detector as defined in claim 8 wherein said porous wall portion is a ceramic material.
Claim 9
Dependent Claim
27 words
A particle detector as defined in claim 1 wherein said photodetector for detecting the nuclei concentration includes a lamp and photodetector operatively housed proximate to said chamber.
Claim 10
Dependent Claim
31 words
A particle detector as defined in claim 10 wherein said detecting means includes a mirror disposed, in facing relationship to said lamp and photodetector, between said humidifying means and said chamber.
Claim 11
Dependent Claim
23 words
A particle detector as defined in claim 1 and further comprising means for preventing outside light from effecting the reading of said photodetector.
Claim 12
Dependent Claim
24 words
A particle detector as defined in claim 12 wherein said preventing means includes a maze arrangement located between said humidifying means and said chamber.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |