US3623136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-source lamp for atomic light-absorption analysis
Assignee: Hitachi Ltd
•
Filing: 1969-05-07
•
Granted: 1971-11-23
•
Expires: 1989-05-07
Abstract
Abstract A light source lamp for atomic light-absorption analysis comprising a structure constituted by a molded body of fine metal wires having a relatively high-melting-point which are mechanically closely linked with each other having a metal having a relatively low-melting-point impregnated in the gaps between the fine wires, wherein the metal of a low-melting-point is continuously fed to a hollow portion through the gaps between the fine wires while maintaining the contour of the structure by virtue of the frame composed of the fine metal wires of a highmelting-point, thereby making it possible to produce a high light-intensity resonance line of the low-melting-point metal which is stabilized for a long time.
Inventors
- 👤 Sadami Tomita
- 👤 Akira Hosoya
- 👤 Hiroshi Okagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:44
CPC Classifications
G; G01; 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: 32
Claim 1
Independent Claim
133 words
A light source lamp for atomic light-absorption analysis comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and an inert gas atmosphere confined in said envelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of a metal having such a relatively high melting point that it will not be deformed at the operating temperature of said light source lamp, and at least part of the gaps between said fine wires being filled with a predetermined quantity of a metal for irradiating a desired resonance spectral light, which metal has a relatively low melting point compared with the metal forming said fine wires.
Claim 2
Dependent Claim
133 words
A light source lamp for atomic light-absorption analysis comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and an inert gas atmosphere confined in said envelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of a metal having such a relatively high melting point that it will not be deformed at the operating temperature of said light source lamp, and at least part of the gaps between said fine wires being filled with a predetermined quantity of a metal for irradiating a desired resonance spectral light, which metal has a relatively low melting point compared with the metal forming said fine wires.
Claim 3
Dependent Claim
50 words
A light source lamp according to claim 1, wherein said cathode is formed in a predetermined contour by intertwining fine wires of a predetermined dimension consisting of the relatively high-melting-point metal, and substantially all gaps between said fine wires are filled with an impregnation metal of the relatively low-melting-point metal.
Claim 4
Dependent Claim
28 words
A light source lamp according to claim 2, wherein the fine wires of the relatively high-melting-point metal are regularly arranged to define the predetermined contour of said cathode.
Claim 5
Dependent Claim
33 words
A light source lamp according to claim 2, wherein the fine wires of the relatively high-melting-point metal are irregularly arranged and entwinned with each other to define the predetermined contour of said cathode.
Claim 6
Dependent Claim
23 words
A light source lamp according to claim 2, wherein said relatively low-melting-point metal is composed of an alloy of an alkali metal element.
Claim 7
Dependent Claim
56 words
A light-source lamp according to claim 1, wherein fine wires of a predetermined dimension consisting of the relatively high-melting-point metal are entwinned with each other to define the predetermined contour of the cathode, and at least part of the gaps between the fine wires are filled with metal powder of the relatively low melting point metal.
Claim 8
Dependent Claim
31 words
A light-source lamp according to claim 6, wherein the gaps between the fine wires of the relatively high-melting-point metal are filled with melted metal powder having a relatively low melting point.
Claim 9
Dependent Claim
44 words
A light source lamp according to claim 1, wherein the relatively low melting point is made of fine wires, both the fine wires of the high-melting-point metal and the low-melting-point metal being entwined with each other to define the predetermined contour of the cathode.
Claim 10
Dependent Claim
48 words
A light source lamp to claim 8, wherein the fine wires of the metal having a relatively high melting point and the fine wires of the metal having a relatively low melting point are arranged in regular relationship to each other to define the contour of the cathode.
Claim 11
Dependent Claim
42 words
A light source lamp according to claim 8, wherein the fine wires of the metal having a relatively high melting point and the fine wires of the metal having a relatively low melting point are arranged in irregular relationship to each other.
Claim 12
Dependent Claim
65 words
A light source lamp according to claim 6, wherein the fine wires of the relatively high-melting-point metal are entwinned with each other, at least part of the gaps between the fine wires are filled with the powdered metal having a relatively low melting point, and the remaining gaps are filled with an impregnated metal having a lower melting point than that of said powdered metal.
Claim 13
Dependent Claim
63 words
A light-source lamp according to claim 8, wherein the fine wires of the relatively high-melting-point metal and fine wires of the relatively low-melting-point metal are entwinned with each other to define the predetermined contour of the cathode, and substantially all the gaps between said fine wires are filled with an impregnated metal having a lower melting point than that of said low-melting-point metal.
Claim 14
Dependent Claim
62 words
A light source lamp according to claim 8, wherein the fine wires of the relatively high-melting-point metal and the fine wires of the relatively low-melting-point metal are entwinned with each other to define the predetermined contour of the cathode, and at least part of the gaps between the fine wires are filled with a powdered metal having a relatively low melting point.
Claim 15
Dependent Claim
31 words
A light-source lamp according to claim 1, wherein the fine wires of the relatively high melting point are 200 microns or less in thickness and 0.5 mm. or less in width.
Claim 16
Independent Claim
78 words
A method of manufacturing a hollow cathode of a light-source lamp for atomic light-absorption analysis comprising the steps of mechanically linking fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with each other to form a predetermined structure, impregnating the gaps between said fine wires with a predetermined quantity of a metal having a relative low melting point, and forming the resultant body into a desired contour for the hollow cathode.
Claim 17
Independent Claim
78 words
A method of manufacturing a hollow cathode of a light-source lamp for atomic light-absorption analysis comprising the steps of mechanically linking fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with each other to form a predetermined structure, impregnating the gaps between said fine wires with a predetermined quantity of a metal having a relative low melting point, and forming the resultant body into a desired contour for the hollow cathode.
Claim 18
Dependent Claim
26 words
A method of manufacturing a hollow cathode according to claim 15, wherein the fine wires of the relatively high-melting-point metal are press-molded into a predetermined structure.
Claim 19
Dependent Claim
28 words
A method of manufacturing a hollow cathode according to claim 15, wherein the fine wires of the relatively high melting point are knitted to form a predetermined structure.
Claim 20
Independent Claim
53 words
A method of manufacturing a hollow cathode comprising the steps of mixing fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with a predetermined quantity of powdered metal having a relatively low melting point, and press-molding the resulting mixture into a structure having a predetermined contour.
Claim 21
Independent Claim
53 words
A method of manufacturing a hollow cathode comprising the steps of mixing fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with a predetermined quantity of powdered metal having a relatively low melting point, and press-molding the resulting mixture into a structure having a predetermined contour.
Claim 22
Dependent Claim
46 words
A method of manufacturing a hollow cathode according to claim 18, wherein after having been press-molded, the mixture of the fine wires and powdered metal having a relatively low melting point is heated so that said powdered metal is mechanically bonded to said relatively high-melting-point metal.
Claim 23
Dependent Claim
36 words
A method of manufacturing a hollow cathode according to claim 18, further including impregnating gaps between the fine wires and powdered metal with a metal having a lower melting point than that of said powdered metal.
Claim 24
Independent Claim
67 words
A method of manufacturing a hollow cathode comprising the steps of mixing fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with a predetermined quantity of fine wires of a predetermined dimension consisting of a metal having a relatively low melting point, and causing said fine wires to be mechanically tightly linked with each other to form a predetermined structure.
Claim 25
Independent Claim
67 words
A method of manufacturing a hollow cathode comprising the steps of mixing fine wires of a predetermined dimension consisting of a metal having a relatively high melting point with a predetermined quantity of fine wires of a predetermined dimension consisting of a metal having a relatively low melting point, and causing said fine wires to be mechanically tightly linked with each other to form a predetermined structure.
Claim 26
Dependent Claim
18 words
A method of manufacturing a hollow cathode according to claim 21, further including, and press-molding the resulting mixture.
Claim 27
Dependent Claim
29 words
A method of manufacturing a hollow cathode according to claim 21, in which the fine wires of high-melting-point metal and low-melting-point metal are knitted to define a predetermined structure.
Claim 28
Dependent Claim
37 words
A method of manufacturing a hollow cathode according to claim 23, further including heating said structure to fuse and bond the fine wires of the relatively low-melting-point metal, to the fine wires of the relatively high-melting-point metal.
Claim 29
Dependent Claim
113 words
A light-source lamp for atomic light-absorption analysis comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and inert gas atmosphere confined in said enVelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of such a relatively high-melting-point metal as being not deformed at a temperature to operate said light-source lamp, and at least part of the gaps between said fine wires are filled with a predetermined quantity of an evaporated element selected from the group consisting of Se, Te P and AS.
Claim 30
Dependent Claim
113 words
A light-source lamp for atomic light-absorption analysis comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and inert gas atmosphere confined in said enVelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of such a relatively high-melting-point metal as being not deformed at a temperature to operate said light-source lamp, and at least part of the gaps between said fine wires are filled with a predetermined quantity of an evaporated element selected from the group consisting of Se, Te P and AS.
Claim 31
Dependent Claim
117 words
A light-source lamp for atomic light-absorption analysis; comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and an inert gas atmosphere confined in said envelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of such a relatively high-melting-point metal as being not deformed at a temperature to operate said light-source lamp, and at least part of the gaps between said fine wires being filled with a predetermined quantity of an impregnated metal selected from the group consisting of Zn, Cd, In, Sn, Pb, Sb and Bi.
Claim 32
Dependent Claim
117 words
A light-source lamp for atomic light-absorption analysis; comprising a cathode having a hollow portion formed therein, an anode provided adjacent to said cathode, a hermetically sealed envelope containing said cathode and said anode, and an inert gas atmosphere confined in said envelope, wherein said cathode is formed in a predetermined contour by a close mechanical linkage of fine wires of a predetermined dimension consisting of such a relatively high-melting-point metal as being not deformed at a temperature to operate said light-source lamp, and at least part of the gaps between said fine wires being filled with a predetermined quantity of an impregnated metal selected from the group consisting of Zn, Cd, In, Sn, Pb, Sb and Bi.
References Cited (Backward Citations)
US2228327A
Cited
US2103623A
Cited
US2121589A
Cited
US2468037A
Cited
US2604603A
Cited
US2700118A
Cited
US2888592A
Cited
US3286119A
Cited
US3361925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |