Patent US1951712A successfully refreshed from Google Patents.
US3883248A
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Method and apparatus for measuring concentration of substance in its gaseous phase
Assignee: Individual
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Filing: 1972-08-31
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Granted: 1975-05-13
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Expires: 1992-08-31
Abstract
Abstract A method of measuring the concentration of a substance in its gaseous phase, based on passing of a luminous flux emitted by a source of light through a target containing the substance being measured in its gaseous phase, disposed in the target as a periodically interrupted atomic beam, absorbing by the atomic beam a portion of radiation emitted by the luminous flux each time the atomic beam interferes with the flux, which leads to generating an alternating component of the luminous flux, isolating a section of the radiation spectrum including the whole absorption line of the substance involved and converting the luminous flux into corresponding electric signal, repeatedly storing of the alternating component of the electric signal in synchronism with the interruption of the atomic beam, increasing thereby the portion of useful signal in noise and automatically determining the ratio of stored a.c. component of the electric signal to a signal corresponding to the luminous flux passed through the target without being absorbed, proportional to the concentration of the substance being measured in its gaseous phase. An apparatus embodying the above-described method comprising a source of light, said target the luminous flux emitted by which passes successively through a target, made as a vacuum chamber provided with a system of collimating diaphragms for forming the atomic beam from the gaseous phase of the substance involved and a means for interrupting the atomic beam, a spectral instrument for isolating from the radiation spectrum of the source a section comparable with the atomic beam absorption line, a photo detector and a storage circuit making possible to increase the portion of useful signal in noise.
Inventors
- 👤 Vadim Izrailovich Rakhovsky
- 👤 Gennady Izrailovich Stotsky
- 👤 Maria Andreevna Mazing
- 👤 Valery Mikhailovic Shustryakov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/3103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A METHOD OF MEASURING THE CONCENTRATION OF A SUBSTANCE IN ITS GASEOUS PHASE, SAID METHOD COMPRISING THE STEPS OF: CONTINUOUSLY PASSING A LUMINOUS FLUX EMITTED BY A SOURCE OF LIGHT THROUGH A TARGET CONTAINING THE SUBSTANCE BEING MEASURED IN ITS GASEOUS PHASE, THE SUBSTANCE BEING DISPOSED IN SAID TARGET AS A PERIODICALLY INTERRUPTED ATOMIC BEAM; ABSORBING BY SAID ATOMIC BEAM A PORTION OF RADIATION EMITTED BY SAID LUMINOUS FLUX EACH TIME SAID ATOMIC BEAM INTERFERES WITH SAID FLUX, THEREBY GENERATING AN ALTERNATING COMPONENT OF SAID LUMINOUS FLUX; PASSING SAID LUMINOUS FLUX WITHOUT ABSORPTION; ISOLATING A RADIATION SPECTRUM SECTION OF SAID SOURCE OF LIGHT INCLUDING THE WHOLE ABSORPTION LINE OF THE SUBSTANCE INVOLVED; CONVERTING THE LUMINOUS FLUX CORRESPONDING TO SAID ISOLATED SPECTRUM SECTION INTO AN ELECTRIC SIGNAL; REPEATEDLY STORING THE ALTERNAT-
Claim 2
Independent Claim
130 words
A METHOD OF MEASURING THE CONCENTRATION OF A SUBSTANCE IN ITS GASEOUS PHASE, SAID METHOD COMPRISING THE STEPS OF: CONTINUOUSLY PASSING A LUMINOUS FLUX EMITTED BY A SOURCE OF LIGHT THROUGH A TARGET CONTAINING THE SUBSTANCE BEING MEASURED IN ITS GASEOUS PHASE, THE SUBSTANCE BEING DISPOSED IN SAID TARGET AS A PERIODICALLY INTERRUPTED ATOMIC BEAM; ABSORBING BY SAID ATOMIC BEAM A PORTION OF RADIATION EMITTED BY SAID LUMINOUS FLUX EACH TIME SAID ATOMIC BEAM INTERFERES WITH SAID FLUX, THEREBY GENERATING AN ALTERNATING COMPONENT OF SAID LUMINOUS FLUX; PASSING SAID LUMINOUS FLUX WITHOUT ABSORPTION; ISOLATING A RADIATION SPECTRUM SECTION OF SAID SOURCE OF LIGHT INCLUDING THE WHOLE ABSORPTION LINE OF THE SUBSTANCE INVOLVED; CONVERTING THE LUMINOUS FLUX CORRESPONDING TO SAID ISOLATED SPECTRUM SECTION INTO AN ELECTRIC SIGNAL; REPEATEDLY STORING THE ALTERNAT-
Claim 3
Dependent Claim
43 words
A method as claimed in claim 1, wherein before passing the luminous flux through said atomic beam, the atoms of the latter are brought into excited electron state for measuring the concentration of a substance having a complex absorption spectrum in non-excited state.
Claim 4
Independent Claim
194 words
An apparatus for measuring the concentration of the substance in its gaseous phase, said apparatus comprising a source of light; a vacuum chamber, said chamber being disposed on the path of the luminous flux emitted by said source of light; a system of collimating diaphragms of said vacuum chamber accommodated inside and serving to form an atomic beam from the gaseous phase of the substance involved, placed inside said vacuum chamber; a means for interrupting said atomic beam in said vacuum chamber, located relative to said chamber so that the interruption of said atomic beam is ensured; a spectral instrument for isolating from the radiation spectrum of said source of light a section comparable with the absorption line of said atomic beam, disposed on the path of the luminous flux emitted by said source of light; a photo detector means located on the luminous flux path for converting the flux of said isolated radiation spectrum section into an electric signal; a storage system means for electrical signals electrically coupled with said photo detector increasing the portion of useful signal in noise; and a recorder of electrical signals electrically coupled with said storage system means.
Claim 5
Independent Claim
194 words
An apparatus for measuring the concentration of the substance in its gaseous phase, said apparatus comprising a source of light; a vacuum chamber, said chamber being disposed on the path of the luminous flux emitted by said source of light; a system of collimating diaphragms of said vacuum chamber accommodated inside and serving to form an atomic beam from the gaseous phase of the substance involved, placed inside said vacuum chamber; a means for interrupting said atomic beam in said vacuum chamber, located relative to said chamber so that the interruption of said atomic beam is ensured; a spectral instrument for isolating from the radiation spectrum of said source of light a section comparable with the absorption line of said atomic beam, disposed on the path of the luminous flux emitted by said source of light; a photo detector means located on the luminous flux path for converting the flux of said isolated radiation spectrum section into an electric signal; a storage system means for electrical signals electrically coupled with said photo detector increasing the portion of useful signal in noise; and a recorder of electrical signals electrically coupled with said storage system means.
Claim 6
Dependent Claim
55 words
An apparatus as claimed in claim 3, wherein said storage system means is provided with a synchronous detector and a synchronizer, the input of said detector being electrically coupled with the output of said photo detector, said synchronizer being connected between another output of said detector and said above-described means for interrupting said atomic beam.
Claim 7
Dependent Claim
35 words
An apparatus as claimed in claim 3, wherein said spectral instrument is provided with a multiple-wave interferometer, said interferometer being made as two parallel half-silvered mirrors, and a monochromator installed along the luminous flux path.
Claim 8
Dependent Claim
35 words
An apparatus as claimed in claim 4, wherein said spectral instrument is provided with a multiple-wave interferometer said interferometer being made as two parallel half-silvered mirrors, and a monochromator installed along the luminous flux path.
Claim 9
Dependent Claim
41 words
An apparatus as claimed in claim 5, wherein said multiplewave interferometer is disposed inside said vacuum chamber and said half-silvered mirrors thereof are arranged substantially parallel to the axis of said atomic beam inside said vacuum chamber and embrace said beam.
Claim 10
Dependent Claim
42 words
An apparatus as claimed in claim 3, wherein to provide the absorption line of the substance measured having an isotope structure, said source of light is provided with a line radiation spectrum from an even isotope of the substance involved arranged inside.
Claim 11
Dependent Claim
42 words
An apparatus as claimed in claim 4, wherein to provide the absorption line of the substance measured having an isotope structure, said source of light is provided with a line radiation spectrum from an even isotope of the substance involved arranged inside.
Claim 12
Dependent Claim
42 words
An apparatus as claimed in claim 5, wherein to provide the absorption line of the substance measured having an isotope structure, said source of light is provided with a line radiation spectrum from an even isotope of the substance involved arranged inside.
References Cited (Backward Citations)
US3386331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |