US3851520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas monitoring system
Assignee: Honeywell Inc
•
Filing: 1973-05-22
•
Granted: 1974-12-03
•
Expires: 1993-05-22
Abstract
Abstract A method of monitoring the amount of pollutant in a gas comprising the steps of passing the gas through a first sensor to obtain a first output signal indicative of the amount of pollutant therein, passing the gas through a dilution means capable of removing a known percentage of the pollutant and passing the gas next through a second sensor to obtain a second output signal indicative of the amount of pollutant remaining.
Inventors
- 👤 B Schluter
- 👤 E Tromborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0014; G01N1/00; G01N1/28; G01N1/38; G01N2001/385
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A method of monitoring a gas which contains a pollutant, comprising: passing the gas through a first sensor to obtain a first signal indicative of the amount of pollutant therein; passing the gas next through a dilution means, said dilution means being adapted to remove a known quantity of said pollutant from said gas; passing said gas next through a second sensor to obtain a second signal indicative of the amount of pollutant remaining therein; and wherein saiD dilution means passes a known percentage of said gas through an absorbing means for absorbing said pollutant and the remaining percentage of said gas is passed directly to said second sensor.
Claim 2
Independent Claim
109 words
A method of monitoring a gas which contains a pollutant, comprising: passing the gas through a first sensor to obtain a first signal indicative of the amount of pollutant therein; passing the gas next through a dilution means, said dilution means being adapted to remove a known quantity of said pollutant from said gas; passing said gas next through a second sensor to obtain a second signal indicative of the amount of pollutant remaining therein; and wherein saiD dilution means passes a known percentage of said gas through an absorbing means for absorbing said pollutant and the remaining percentage of said gas is passed directly to said second sensor.
Claim 3
Dependent Claim
123 words
Apparatus for monitoring a gas which contains a pollutant, comprising: first sensing means for obtaining a first signal indicative of the amount of pollutant contained in said gas; dilution means sequentially connected to said first sensor for receiving gas from said sensor and adapted to remove a known percentage of said pollutant from said gas; second sensing means adapted to receive said gas from said dilution means and to indicate a second signal indicative of the amount of pollutant remaining in said gas; and said dilution means including an absorption means for absorbing a portion of said pollutant from said gas and further containing by-pass means for passing the remaining portion of said gas directly from said first sensor to said second sensor.
Claim 4
Dependent Claim
123 words
Apparatus for monitoring a gas which contains a pollutant, comprising: first sensing means for obtaining a first signal indicative of the amount of pollutant contained in said gas; dilution means sequentially connected to said first sensor for receiving gas from said sensor and adapted to remove a known percentage of said pollutant from said gas; second sensing means adapted to receive said gas from said dilution means and to indicate a second signal indicative of the amount of pollutant remaining in said gas; and said dilution means including an absorption means for absorbing a portion of said pollutant from said gas and further containing by-pass means for passing the remaining portion of said gas directly from said first sensor to said second sensor.
References Cited (Backward Citations)
US2591760A
Cited
US2591761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |