Patent US3873205A successfully refreshed from Google Patents.
US3873205A
Expired / Lapsed
US
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Assembly for use in atomic absorption spectroscopy
Assignee: Shandon Southern Instruments Ltd
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Filing: 1973-10-03
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Granted: 1975-03-25
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Expires: 1993-10-03
Abstract
Abstract An atomic vapour source which includes two spaced metal pillars clamped between but electrically insulated from two plates defining a chamber therebetween, each pillar being adapted at one end to be clamped to one end of carbon rod extending between the ends of the two pillars, the clamping ends of the pillars being free to move relative to one another to permit expansion and contraction of the carbon rod when heated and cooled.
Inventors
- 👤 Kenneth Clive Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
An atomic vapour source which includes two spaced metal pillars clamped between but electrically insulated from two plates defining a chamber therebetween, each pillar being adapted at one end to be clamped to one end of a carbon rod extending between the ends of the two pillars, the clamping ends of the pillars being free to move relative to one another to permit expansion and contraction of the carbon rod when heated and cooled, said carbon rod provided with means for receiving a sample to be observed, means for directing radiation towards said sample, and means for effecting atomic absorption measurements.
Claim 2
Dependent Claim
101 words
An atomic vapour source which includes two spaced metal pillars clamped between but electrically insulated from two plates defining a chamber therebetween, each pillar being adapted at one end to be clamped to one end of a carbon rod extending between the ends of the two pillars, the clamping ends of the pillars being free to move relative to one another to permit expansion and contraction of the carbon rod when heated and cooled, said carbon rod provided with means for receiving a sample to be observed, means for directing radiation towards said sample, and means for effecting atomic absorption measurements.
Claim 3
Dependent Claim
56 words
An atomic vapour source as claimed in claim 1, wherein the ends of the pillars remote from their clamping ends are fixed to a cross bar or member, so as to be electrically insulated from one another, the cross-bar or member being sufficiently flexible to permit said relative movement of the clamping ends of the pillars.
Claim 4
Dependent Claim
24 words
An atomic vapour source as claimed in claim 2, wherein one cross-bar or member and the plates are fixed to a common support member.
Claim 5
Dependent Claim
26 words
An atomic vapour source as claimed in claim 1, wherein the pillars are electrically insulated from the plates by means of strips of electrically insulating material.
Claim 6
Dependent Claim
22 words
An atomic vapour source as claimed in claim 1, wherein means are provided for circulating cooling fluid through bores in the pillars.
Claim 7
Dependent Claim
22 words
An atomic vapour source as claimed in claim 1, wherein means are provided for introducing an inert gas into the said chamber.
Claim 8
Dependent Claim
30 words
An atomic vapour source as claimed in claim 1, wherein the plates are provided with aligned apertures to permit radiation to be directed through the chamber above the carbon rod.
Claim 9
Dependent Claim
30 words
An atomic vapour souce as claimed in claim 1, wherein apertures are provided in the pillars to permit radiation to be directed through the chamber longitudinally of the carbon rod.
References Cited (Backward Citations)
US3702219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |