US3869643A
Expired / Lapsed
US
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Apparatus for emitting atomic flourescence spectral lines used for atomic absorption analysis
Assignee: Hitachi Ltd
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Filing: 1974-01-04
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Granted: 1975-03-04
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Expires: 1994-01-04
Abstract
Abstract An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope containing an inert gas therein and provided with a first hollow cathode, a second hollow cathode disposed in optically coaxial relation with the first hollow cathode and having a slit, a hollow insulator interposed between the first and second hollow cathodes, an anode extending into the hollow space within the insulator, leads connected to the anode and first and second hollow cathodes, and a window for deriving atomic fluorescence spectral lines in a direction different from the direction of the common optical axis of the first and second hollow cathodes.
Inventors
- 👤 Hiroshi Okagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:01
CPC Classifications
G; G01; G01N; G01N24/00; G01N24/006; G01J; G01J3/00; G01J3/02; G01J3/10; H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
108 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope, first means for emitting spectral lines of atoms in a first position within said envelope, second means for generating vapor of atoms at ground state in a second position within said envelope, said second position lying on the optical axis providing the path for said spectral lines of atoms, and third means for directing atomic fluorescence spectral lines obtained by irrediation of said atomic vapor with said spectral lines of atoms in a direction different from the direction of said optical axis thereby deriving a said fluorescence spectral lines from said envelope.
Claim 2
Independent Claim
108 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope, first means for emitting spectral lines of atoms in a first position within said envelope, second means for generating vapor of atoms at ground state in a second position within said envelope, said second position lying on the optical axis providing the path for said spectral lines of atoms, and third means for directing atomic fluorescence spectral lines obtained by irrediation of said atomic vapor with said spectral lines of atoms in a direction different from the direction of said optical axis thereby deriving a said fluorescence spectral lines from said envelope.
Claim 3
Dependent Claim
36 words
An apparatus as claimed in claim 1, wherein said first means includes means for continuously emitting said spectral lines of atoms, and said second means includes means for generating said atomic, vapor in a pulsed fashion.
Claim 4
Dependent Claim
55 words
An apparatus as claimed in claim 1, wherein said first means includes means for emitting said spectral lines of atoms in a pulsed fashion, and said second means includes means for generating said atomic vapor in a pulsed fashion, the pulse signals applied from said first and second means having a suitable phase difference therebetween.
Claim 5
Dependent Claim
54 words
An apparatus as claimed in claim 1, wherein said third means includes means for deriving said atomic fluorescence spectral lines obtained by irradiation of said atomic vapor with said spectral lines of atoms through an exit window forming a part of said envelope in a direction perpendicular to the direction of said optical axis.
Claim 6
Independent Claim
159 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope, a first hollow cathode disposed in a first position within said envelope for contributing to the emission of spectral lines of atoms, a second hollow cathode disposed in a second position within said envelope on the same optical axis as that of said first hollow cathode for contributing to the generation of vapor of atoms in a ground state, a hollow insulator interposed between said first and second hollow cathodes, an anode disposed within the hollow space of said insulator in common to said first and second cathodes, lead connected to said anode and said first and second cathodes, and a window forming a part of said envelope so that atomic fluorescence spectral lines obtained by irradiating said atom vapor with said spectral lines of atoms can be derived from said envelope in a direction different from the direction of said optical axis.
Claim 7
Independent Claim
159 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope, a first hollow cathode disposed in a first position within said envelope for contributing to the emission of spectral lines of atoms, a second hollow cathode disposed in a second position within said envelope on the same optical axis as that of said first hollow cathode for contributing to the generation of vapor of atoms in a ground state, a hollow insulator interposed between said first and second hollow cathodes, an anode disposed within the hollow space of said insulator in common to said first and second cathodes, lead connected to said anode and said first and second cathodes, and a window forming a part of said envelope so that atomic fluorescence spectral lines obtained by irradiating said atom vapor with said spectral lines of atoms can be derived from said envelope in a direction different from the direction of said optical axis.
Claim 8
Dependent Claim
46 words
An apparatus as claimed in claim 5, wherein a D.C. voltage is applied to said first hollow cathode for continuously emitting said spectral lines of atoms, and a pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion.
Claim 9
Dependent Claim
63 words
An apparatus as claimed in claim 5, wherein a first pulse voltage is applied to said first hollow cathode for emitting said spectral lines of atoms in a pulsed fashion, and a second pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion, said first and second pulse voltages having a suitable phase difference therebetween.
Claim 10
Dependent Claim
40 words
An apparatus as claimed in claim 5, wherein a slit is formed in said second hollow cathode for deriving said atomic fluorescence spectral lines in a direction different from the direction of the optical axis of said second hollow cathode.
Claim 11
Dependent Claim
40 words
An apparatus as claimed in claim 6, wherein a slit is formed in said second hollow cathode for deriving said atomic fluorescence spectral lines in a direction different from the direction of the optical axis of said second hollow cathode.
Claim 12
Dependent Claim
36 words
An apparatus as claimed in cLaim 7, wherein a slit is formed in said second hollow cathode for deriving said atomic fluorescence spectral lines in a direction different from the direction of said second hollow cathode.
Claim 13
Independent Claim
161 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope charged with an inert gas and having a first hollow cathode contributing to the emission of spectral lines of atoms, a second hollow cathode connected gas-tight to said first hollow cathode on the same optical axis with a hollow insulator interposed therebetween for contributing to the generation of a vapor of atoms in a ground state, said second hollow cathode being provided with a slit for directing atomic fluorescence spectral lines obtained by irradiation of said atomic vapor with said spectral lines of atoms in a direction perpendicular to the direction of said optical axis, an anode disposed within the hollow space of said insulator in common to said first and second hollow cathodes, leads connected to said anode and said first and second hollow cathodes, and a window for deriving said atomic fluorescence spectral lines from said envelope to direct same to the exterior.
Claim 14
Independent Claim
161 words
An apparatus for emitting atomic fluorescence spectral lines used for atomic absorption analysis comprising an envelope charged with an inert gas and having a first hollow cathode contributing to the emission of spectral lines of atoms, a second hollow cathode connected gas-tight to said first hollow cathode on the same optical axis with a hollow insulator interposed therebetween for contributing to the generation of a vapor of atoms in a ground state, said second hollow cathode being provided with a slit for directing atomic fluorescence spectral lines obtained by irradiation of said atomic vapor with said spectral lines of atoms in a direction perpendicular to the direction of said optical axis, an anode disposed within the hollow space of said insulator in common to said first and second hollow cathodes, leads connected to said anode and said first and second hollow cathodes, and a window for deriving said atomic fluorescence spectral lines from said envelope to direct same to the exterior.
Claim 15
Dependent Claim
46 words
An apparatus as claimed in claim 11, wherein a D.C. voltage is applied to said first hollow cathode for continuously emitting said spectral lines of atoms, and a pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion.
Claim 16
Dependent Claim
63 words
An apparatus as claimed in claim 11, wherein a first pulse voltage is applied to said first hollow cathode for emitting said spectral lines of atoms in a pulsed fashion, and a second pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion, said first and second pulse voltages having a suitable phase difference therebetween.
Claim 17
Dependent Claim
56 words
An apparatus as claimed in claim 1, wherein said first means includes means for emitting said spectral lines of atoms in a pulsed fashion, and said second means includes means for generating said atomic vapor in a pulsed fashion, the pulse signals applied from said first and second means having a phase difference of 180* therebetween.
Claim 18
Dependent Claim
64 words
An apparaturs as claimed in claim 5, wherein a first pulse voltage is applied to said first hollow cathode for emitting said spectral lines of atoms in a pulsed fashion, and a second pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion, said first and second pulse voltages having a phase difference of 180* therebetween.
Claim 19
Dependent Claim
64 words
An apparatus as claimed in claim 11, wherein a first pulse voltage is applied to said first hollow cathode for emitting said spectral lines of atoms in a pulsed fashion, and a second pulse voltage is applied to said second hollow cathode for generating said atomic vapor in a pulsed fashion, said first and second pulse voltages having a phase difference of 180* therebetween.
References Cited (Backward Citations)
US3089054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |