US3726599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample cell for liquid scintillation counters
Assignee: Beckman Coulter Inc
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Filing: 1970-11-27
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Granted: 1973-04-10
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Expires: 1990-11-27
Abstract
Abstract A sample cell is disclosed for adapting liquid scintillation counters to chemiluminescence measurements. A glass reaction vessel is secured within a support tube of substantially the same size and shape as the elevator passageway of a liquid scintillation counter. An O-ring seals the passageway against ambient light when the reaction vessel is in the counting position. A plurality of glass tubes are sealed within the vessel and are brought through the top of the support tube by black polyethylene tubing, the black polyethylene preventing light piping from the exterior to within the reaction vessel. Two of the glass tubes are open and terminate near the bottom of the vessel to fill and empty the vessel. A third is sealed at its lower end and receives a thermistor to measure sample temperature. Two other tubes are interconnected by a tubular helix for circulation of a thermostating fluid. The vessel may be sandblasted and the bottom silvered or aluminized to improve optical transmission characteristics. The bottom is covered with felt to absorb mechanical shock.
Inventors
- 👤 M Neary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/75; G01N21/76; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/204; Y; Y10; Y10S; Y10S435/00; Y10S435/808
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
A sample cell for use in a liquid scintillation counter having a light tight counting chamber and an elevator passageway extending from the exterior of said counter into said chamber comprising: a cell body of material transparent to photons; a plurality of tubes extending from outside said cell body into the interior thereof, at least one of said tubes being open at each end thereof to allow sample fluid to pass therethrough; a support tube secured to one end of said cell body, said support tube being of substantially the same size and shape as said elevator passageway and of sufficient length to extend beyond said passageway when said cell body is within said counting chamber; and means on said support tube for cooperating with said passageway for sealing said counting chamber against ambient light when said cell body is in said counting chamber.
Claim 2
Dependent Claim
144 words
A sample cell for use in a liquid scintillation counter having a light tight counting chamber and an elevator passageway extending from the exterior of said counter into said chamber comprising: a cell body of material transparent to photons; a plurality of tubes extending from outside said cell body into the interior thereof, at least one of said tubes being open at each end thereof to allow sample fluid to pass therethrough; a support tube secured to one end of said cell body, said support tube being of substantially the same size and shape as said elevator passageway and of sufficient length to extend beyond said passageway when said cell body is within said counting chamber; and means on said support tube for cooperating with said passageway for sealing said counting chamber against ambient light when said cell body is in said counting chamber.
Claim 3
Dependent Claim
43 words
The sample cell according to claim 1 wherein each of said plurality of tubes extend through that portion of said support means extending beyond said passageway, at least that portion of said tubes extending through said support tube being of black inert material.
Claim 4
Dependent Claim
23 words
The sample cell according to claim 2 wherein one of said plurality of tubes is closed at the end within said cell body.
Claim 5
Dependent Claim
38 words
The sample cell according to claim 3 wherein two of said tubes are open at each end thereof to allow sample fluid flow therethrough, each of said open tubes extending substantially to the bottom of said cell body.
Claim 6
Dependent Claim
29 words
The sample cell according to claim 4 further including tube means within said cell body interconnecting a pair of said plurality of tubes for circulating a thermostatting fluid therethrough.
Claim 7
Dependent Claim
178 words
A sample cell for use in a liquid scintillation counter having a light tight counting chamber and an elevator passageway extending from the exterior of said counter into said chamber comprising: a glass reaction cell; a plurality of glass tubes sealed in one end of said cell, at least a pair of said tubes being opened at both ends and extending substantially to the other end of said cell; a support tube secured to said one end of said cell, said support tube being completely closed and of substantially the same size, and shape as said elevator passageway, said support tube being longer than said elevator passageway and extended therefrom when said cell is in the counting chamber; at least one O-ring on the outer surface of said support tube, said O-ring fitting against the wall of said passageway to seal said passageway against ambient light when said cell is in the counting chamber; black inert tubing means connected to each of said glass tubes and extending through the portion of said support tube extending beyond said passageway.
Claim 8
Dependent Claim
178 words
A sample cell for use in a liquid scintillation counter having a light tight counting chamber and an elevator passageway extending from the exterior of said counter into said chamber comprising: a glass reaction cell; a plurality of glass tubes sealed in one end of said cell, at least a pair of said tubes being opened at both ends and extending substantially to the other end of said cell; a support tube secured to said one end of said cell, said support tube being completely closed and of substantially the same size, and shape as said elevator passageway, said support tube being longer than said elevator passageway and extended therefrom when said cell is in the counting chamber; at least one O-ring on the outer surface of said support tube, said O-ring fitting against the wall of said passageway to seal said passageway against ambient light when said cell is in the counting chamber; black inert tubing means connected to each of said glass tubes and extending through the portion of said support tube extending beyond said passageway.
Claim 9
Dependent Claim
38 words
The sample cell according to claim 6 wherein one of said glass tubes is sealed at its end within said cell; and a thermistor is said last named tube for measuring the temperature of sample in said cell.
Claim 10
Dependent Claim
33 words
The sample cell according to claim 7 wherein the outer surface of the other end of said cell is coated with a reflective material; and a shock resistant material secured over said coating.
Claim 11
Dependent Claim
17 words
The sample cell according to claim 7 wherein the outer surface of said cell has been sandblasted.
Claim 12
Dependent Claim
34 words
The sample cell according to claim 9 further including: glass tubing means in the form of a helix within said cell and interconnecting two of said glass tubes for circulating a thermostatting fluid therethrough.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |