US3678489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the concentration of combustible gases and vapors
Assignee: Individual
•
Filing: 1971-02-08
•
Granted: 1972-07-18
•
Expires: 1991-02-08
Abstract
Abstract An apparatus for determining the concentration of combustible gases and vapors in which there is a control relay which is electrically connected to an a.c. source and which accepts the signal proportional to the concentration of combustible gases and vapors from a catalytic-oxidation transducer and the output signal of which controls a single-shot multivibrator electrically connected to the catalytic-oxidation transducer and the selfcontained d.c. voltage source in such a manner that at the critical concentration of combustible gases and vapors the single-shot multivibrator periodically disconnects the catalyticoxidation transducer from the self-contained d.c. voltage source and at the same time turns on the alarm unit giving signals about the critical concentration of combustible gases and vapors.
Inventors
- 👤 Alexandr Nazarievich Scherban
- 👤 Neonil Izrailevich Furman
- 👤 Boris Feodosievich Sotnichenko
- 👤 Nikolai Stefanovic Belogolovin
- 👤 Jury Ivanovich Chopovsky
- 👤 Jury Nikolaevich Sutormin
- 👤 Valentin Ivanovich Zaitsev
- 👤 Vladimir Ivanovich Kot
- 👤 Nikolai Tarasovich Mikhalljuk
- 👤 Sergei Andreevich Denisenko
- 👤 Anatoly Vasilievich Chaschinov
- 👤 Stepan Vasilievich Shaporev
- 👤 Svetlana Mikhailovn Samoilenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
An apparatus for determining the concentration of combustible gases and vapors, comprising: a self-contained d.c. voltage source; an a.c. voltage source electrically connected to said self-contained d.c. voltage source; a catalytic-oxidation transducer electrically connected to said self-contained d.c. voltage source; a meter connected to the output of said catalytic-oxidation transducer; a control relay electrically connected to said a.c. voltage source and accepting the signal proportional to the concentration of said combustible gases and vapors from said catalytic-oxidation transducer; an alarm unit which gives signals at the critical concentration of said combustible gases and vapors; a single-shot multivibrator electrically connected to said catalytic-oxidation unit and said self-contained d.c. voltage source and controlled by the output signal of said control relay in such a manner that at the critical concentration of said combustible gases and vapors said single-shot multivibrator periodically disconnects said catalytic-oxidation transducer from said self-contained d.c. voltage source and at the same time turns on said alarm unit.
Claim 2
Independent Claim
158 words
An apparatus for determining the concentration of combustible gases and vapors, comprising: a self-contained d.c. voltage source; an a.c. voltage source electrically connected to said self-contained d.c. voltage source; a catalytic-oxidation transducer electrically connected to said self-contained d.c. voltage source; a meter connected to the output of said catalytic-oxidation transducer; a control relay electrically connected to said a.c. voltage source and accepting the signal proportional to the concentration of said combustible gases and vapors from said catalytic-oxidation transducer; an alarm unit which gives signals at the critical concentration of said combustible gases and vapors; a single-shot multivibrator electrically connected to said catalytic-oxidation unit and said self-contained d.c. voltage source and controlled by the output signal of said control relay in such a manner that at the critical concentration of said combustible gases and vapors said single-shot multivibrator periodically disconnects said catalytic-oxidation transducer from said self-contained d.c. voltage source and at the same time turns on said alarm unit.
Claim 3
Dependent Claim
56 words
An apparatus, as claimed in claim 1, which has an electronic relay which is electrical connected to said self-contained d.c. voltage source and which acts upon said single-shot multivibrator when the voltage of said self-contained d.c. voltage source has dropped below a preset value in such a manner that said alarm unit is turned permanently on.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |