US3633990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demountable cathode glow discharge tube, particularly for self-aligning spectroscopic devices
Assignee: BAIR ATOMIC Inc
•
Filing: 1969-06-18
•
Granted: 1972-01-11
•
Expires: 1989-06-18
Abstract
Abstract In a self-aligning spectroscopic device of the glow discharge type, the cathode of a glow discharge tube is formed with a hollow beryllium copper cylinder which is removably seated within the cathode cavity about the tubular beryllium copper anode of the glow discharge tube. The exterior wall of the anode and the interior wall of the cylinder forms a cavity which contains a gaseous discharge medium.
Inventors
- 👤 George Baierlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:09
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; H; H01; H01J; H01J17/00; H01J17/38; H01J17/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
340 words
A spectroscopic apparatus comprising excitation means, including a glow discharge tube, having demountable cathode means, for causing a chemical specimen to emit characteristic radiation, said glow discharge tube having anode and cathode means, said anode means formed with a tubular portion and said cathode means formed with a bore, the diameter of said cathode bore being larger than the diameter of said tubular portion of said anode means, said cathode bore receiving said tubular portion of said anode means, said tubular portion of said anode means concentrically mounted within said cathode bore, said cathode means also formed with a groove operating to slidably receive said demountable cathode means, said demountable cathode means interposed between said anode and cathode means, a cavity being formed between an exterior surface of said tubular portion of said anode means and an interior surface of said demountable cathode means, entrance slit means for passing said radiation from said excitation means, diffraction grating means for diffracting said radiation from said entrance slit means into a distribution of spectrum lines of which a plurality of spectrum lines indicate the composition of the specimen and a selected spectrum line serves as a reference, a plurality of exit slit means for passing said plurality of said spectrum lines, a plurality of indicator photodetecting means for receiving said plurality of spectrum lines, a selected exit slit means for passing said selected spectrum line, a reference photodetecting means for receiving said selected spectrum line in order to produce a signal, said entrance slit means, said diffraction grating means, said plurality of exit slit means and said selected exit slit means being geometrically related and oriented with respect to each other to provide coincidence of said plurality of spectrum lines with said plurality of exit slit means and said selected spectrum line with said selected exit slit means, and servo means responsive to said signal for controlling the relations among and orientations of said entrance slit means, said diffraction grating means, said plurality of exit slit means and said selected slit means.
Claim 2
Dependent Claim
340 words
A spectroscopic apparatus comprising excitation means, including a glow discharge tube, having demountable cathode means, for causing a chemical specimen to emit characteristic radiation, said glow discharge tube having anode and cathode means, said anode means formed with a tubular portion and said cathode means formed with a bore, the diameter of said cathode bore being larger than the diameter of said tubular portion of said anode means, said cathode bore receiving said tubular portion of said anode means, said tubular portion of said anode means concentrically mounted within said cathode bore, said cathode means also formed with a groove operating to slidably receive said demountable cathode means, said demountable cathode means interposed between said anode and cathode means, a cavity being formed between an exterior surface of said tubular portion of said anode means and an interior surface of said demountable cathode means, entrance slit means for passing said radiation from said excitation means, diffraction grating means for diffracting said radiation from said entrance slit means into a distribution of spectrum lines of which a plurality of spectrum lines indicate the composition of the specimen and a selected spectrum line serves as a reference, a plurality of exit slit means for passing said plurality of said spectrum lines, a plurality of indicator photodetecting means for receiving said plurality of spectrum lines, a selected exit slit means for passing said selected spectrum line, a reference photodetecting means for receiving said selected spectrum line in order to produce a signal, said entrance slit means, said diffraction grating means, said plurality of exit slit means and said selected exit slit means being geometrically related and oriented with respect to each other to provide coincidence of said plurality of spectrum lines with said plurality of exit slit means and said selected spectrum line with said selected exit slit means, and servo means responsive to said signal for controlling the relations among and orientations of said entrance slit means, said diffraction grating means, said plurality of exit slit means and said selected slit means.
Claim 3
Dependent Claim
20 words
The spectroscopic apparatus of claim 1 wherein said selected spectrum line is the central image from said diffraction grating means.
Claim 4
Dependent Claim
48 words
The spectroscopic apparatus of claim 1 wherein said demountable cathode means is a hollow cylinder, said hollow cylinder being slidably received within said groove, said cavity being formed between said exterior surface of said tubular portion of said anode means and an interior surface of said hollow cylinder.
Claim 5
Dependent Claim
142 words
A spectroscopic specimen exciting apparatus comprising glow discharge tube means having demountable cathode means for causing a chemical sample to emit characteristic radiation, said glow discharge means including anode and cathode means, said anode means formed with a tubular portion and said cathode means formed with a bore, the diameter of said cathode bore being larger than the diameter of said tubular portioN of said anode means, said cathode bore receiving said tubular portion of said anode means, said tubular portion of said anode means concentrically mounted within said cathode bore, said cathode means having demountable cathode means, said cathode means also formed with a groove operating to slidably receive said demountable cathode means about said anode, a cavity being formed between an exterior surface of said tubular portion of said anode means and an interior surface of said demountable cathode means.
Claim 6
Dependent Claim
142 words
A spectroscopic specimen exciting apparatus comprising glow discharge tube means having demountable cathode means for causing a chemical sample to emit characteristic radiation, said glow discharge means including anode and cathode means, said anode means formed with a tubular portion and said cathode means formed with a bore, the diameter of said cathode bore being larger than the diameter of said tubular portioN of said anode means, said cathode bore receiving said tubular portion of said anode means, said tubular portion of said anode means concentrically mounted within said cathode bore, said cathode means having demountable cathode means, said cathode means also formed with a groove operating to slidably receive said demountable cathode means about said anode, a cavity being formed between an exterior surface of said tubular portion of said anode means and an interior surface of said demountable cathode means.
Claim 7
Dependent Claim
23 words
The spectroscopic specimen-exciting apparatus of claim 4 wherein said apparatus includes clamping means for fastening a specimen to said glow discharge tube means.
Claim 8
Dependent Claim
201 words
The spectroscopic specimen-exciting apparatus of claim 4 wherein said demountable cathode means is a hollow cylinder removably seated within said groove about said anode means, said cavity being formed between said exterior surface of said tubular portion of said anode means an an interior surface of said cylinder, first inlet means whereat a gaseous discharge medium is provided, second inlet means whereat a coolant is provided for said cathode means outlet means for evacuating the internal cavity of said glow discharge tube means, flush inlet means for purging said glow discharge tube means, window means at a rearward wall of said anode means, said window hermetically sealed to said anode means, said sample being hermetically sealed at a forward wall of said cathode means and demountable cathode means, anode terminal means connected to said anode means and cathode terminal means connected to said cathode means, said glow discharge tube means being charged with a gaseous discharge medium via said first inlet means, said gaseous discharge medium being contained within said cavity formed between said anode means and demountable cathode means, said sample being excited via a potential applied to said anode and cathode terminal means, whereby said sample emits characteristic radiation.
Claim 9
Dependent Claim
62 words
The glow discharge tube means of claim 6 wherein said outlet means includes valve means operatively connected to a source of inert gas at high pressure and said flush inlet means, said inert gas operating to push said hollow cylinder out of said groove and eject said hollow cylinder from said cathode means when said valve means are in the flush position.
Claim 10
Dependent Claim
15 words
The spectroscopic specimen exciting apparatus of claim 6 wherein said anode means is beryllium copper.
Claim 11
Dependent Claim
17 words
The spectroscopic specimen-exciting apparatus of claim 6 wherein said cathode means and hollow cylinder is beryllium copper.
Claim 12
Dependent Claim
77 words
The spectroscopic specimen-exciting apparatus of claim 6 wherein said outlet means includes first outlet means and second outlet means, said first outlet means having a larger orifice than said second outlet means, whereby the pressure of said gaseous discharge medium is greater at the rearward portion of said glow discharge tube means than the pressure at the forward portion of said glow discharge tube means, said sample being at the forward portion of said glow discharge tube.
References Cited (Backward Citations)
US3090278A
Cited
US3543077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |