US3734601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow cell assembly for colorimetric measurements
Assignee: SLM Instruments Inc
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Filing: 1971-07-08
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Granted: 1973-05-22
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Expires: 1991-07-08
Abstract
Abstract A flow cell assembly for adapting an apparatus for both fluorometric and colorimetric studies. The assembly includes a holder having a folded optical path between an external light source and photosensitive response means. The light input to the optical path is at right angles to the light output therefrom so that the assembly may be employed in place of the sample cuvette of a conventional spectrofluorescence measuring instrument. The holder contains a flow tube having an offset sight passageway portion supported endwise in the optical path. The holder includes a light shield plate slotted to receive the legs of the offset portion and to substantially protect the offset sight passageway portion and the folded optical path from stray light. The flow tube may include an integral debubbler.
Inventors
- 👤 L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:58
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N21/01; G01N21/03; G01N21/05; G01N21/84; G01N21/85; G01N2021/054; G01N21/17; G01N21/25; G01N21/251; G01N2201/00; G01N2201/06; G01N2201/064
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
122 words
In an apparatus having a sample-receiving space, means for generating an excitation beam and directing said beam along a first path toward said sample-receiving space, photosensitive means located along a second path substantially at right angles to said first beam path to receive radiation from said samplereceiving space, a flow cell element for liquid to be analyzed, said flow cell element including an elongated transparent sight chamber whose axis is without said first path, means defining an optical path between said first and second paths and substantially along the axis of said sight chamber, and means to support said flow cell element and optical means within said space whereby the radiation from said space is representative of said liquid to be analyzed.
Claim 2
Dependent Claim
122 words
In an apparatus having a sample-receiving space, means for generating an excitation beam and directing said beam along a first path toward said sample-receiving space, photosensitive means located along a second path substantially at right angles to said first beam path to receive radiation from said samplereceiving space, a flow cell element for liquid to be analyzed, said flow cell element including an elongated transparent sight chamber whose axis is without said first path, means defining an optical path between said first and second paths and substantially along the axis of said sight chamber, and means to support said flow cell element and optical means within said space whereby the radiation from said space is representative of said liquid to be analyzed.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1, and wherein the means generating said excitation beam includes a monochromator for selecting the wavelength of the excitation beam.
Claim 4
Dependent Claim
25 words
The apparatus of claim 1, and wherein the optical path leading to said photosensitive means includes a monochromator for selecting a wavelength of said emission.
Claim 5
Dependent Claim
40 words
The apparatus of claim 1 wherein said sight chamber comprises an offset portion of a transparent main tubular body containing said liquid to be analyzed, said offset portion having respective end legs integrally connecting it to said main tubular body.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4, and wherein said offset portion is substantially parallel to the main tubular body.
Claim 7
Dependent Claim
27 words
The apparatus of claim 5 further comprising an opaque housing, said flow cell element and optical path means defining a folded optical path supported within said housing.
Claim 8
Dependent Claim
31 words
The apparatus of claim 6, and an opaque light shield plate secured around said end legs in said housing in a plane between said offset portion and the main tubular body.
Claim 9
Dependent Claim
21 words
The apparatus of claim 7, and wherein said shield plate has a slot through which said end legs are snugly received.
Claim 10
Dependent Claim
28 words
The apparatus of claim 8, and a clamping screw threadedly engaged through a wall portion of said housing adjacent said offset portion and supportingly engaging said offset portion.
Claim 11
Dependent Claim
101 words
A flow cell assembly comprising an opaque housing having an excitation beam inlet passage and a radiation outlet passage having an optical axis substantially perpendicular to the optical axis of the excitation beam inlet passage, a liquid flow tube having a substantiallY parallel transparent offset portion defining a sight chamber, said sight chamber being disposed on an axis without said axis of said inlet passage, means defining an optical path between said inlet passage and said outlet passage and substantially along the axis of said sight chamber, and means supporting said liquid flow tube and said optical means in said housing.
Claim 12
Dependent Claim
101 words
A flow cell assembly comprising an opaque housing having an excitation beam inlet passage and a radiation outlet passage having an optical axis substantially perpendicular to the optical axis of the excitation beam inlet passage, a liquid flow tube having a substantiallY parallel transparent offset portion defining a sight chamber, said sight chamber being disposed on an axis without said axis of said inlet passage, means defining an optical path between said inlet passage and said outlet passage and substantially along the axis of said sight chamber, and means supporting said liquid flow tube and said optical means in said housing.
Claim 13
Dependent Claim
34 words
The flow cell assembly of claim 10, and wherein an opaque light shield plate is provided in said housing between the plate of said offset portion and the main plane of said flow tube.
Claim 14
Dependent Claim
41 words
The flow cell assembly of claim 11, and wherein said sight chamber has respective end legs at right angles thereto integrally connecting the sight chamber to the flow tube, said light shield plate having a slot snugly receiving said end legs.
Claim 15
Dependent Claim
30 words
The flow cell assembly of claim 12, and a clamping screw threadedly engaged through a wall portion of said housing adjacent said sight chamber and supportingly engaging said sight chamber.
Claim 16
Dependent Claim
30 words
The flow cell assembly of claim 10, and wherein said flow tube has an inlet portion and is provided with a debubbler conduit integrally connected thereto adjacent said inlet portion.
Claim 17
Dependent Claim
37 words
The flow cell assembly of claim 10, and wherein said housing is substantially square in cross-section and wherein said excitation beam inlet passage and emission outlet passage are located in adjacent mutually perpendicular walls of said housing.
Claim 18
Dependent Claim
99 words
The flow cell assembly of claim 15, and wherein said housing comprises a main block and a hollow cover secured on said main block, said main block having a generally U-shaped recess provided with angled corner mirrors and said mutually perpendicular walls have recesses exposed to and adjacent said inlet and outlet passages and exposed to the ends of said U-shaped recess, said last-named recesses having angled mirrors, said mirrors being mutually oriented to define said optical path between the inlet and outlet passages, said flow tube offset portion being supported longitudinally in one side of said U-shaped recess.
Claim 19
Dependent Claim
62 words
The flow cell assembly of claim 16, and an opaque light shield plate disposed between said main block and said hollow cover, said shield plate having a slot over one side of the U-shaped recess and said offset portion having integral end supporting legs snugly engaged through said slot, whereby said sight chamber is substantially shielded from stray light in said cover.
Claim 20
Dependent Claim
31 words
The flow cell assembly of claim 17, and a clamping screw threadedly engaged through the housing wall adjacent said one side of the U-shaped recess and supportingly engaging said offset portion.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |