US3652170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometer chamber
Assignee: Linde Sverige AB
•
Filing: 1970-02-05
•
Granted: 1972-03-28
•
Expires: 1990-02-05
Abstract
Abstract An apparatus useful for measuring the optical properties of a liquid which comprises a cylinder having at least a portion thereof constructed of a transparent material, inlet means at one end of said cylinder for introducing liquid into the cylinder, outlet means at the other end of said cylinder, a piston slidably mounted in said cylinder to define a first portion and a second portion in said cylinder, said first portion being adjacent to said inlet means, a passageway through said piston communicating with said first and second portions and with said outlet means, a valve means positioned in said passageway and adapted to close said passageway when the volume of said first portion is increased by movement of the piston and to open said passageway when the volume of said first portion is decreased by movement of the piston. The apparatus permits reliable measurement of the transparency to light of light samples in the chamber by keeping the walls clean so that the light for one sample does not contaminate or otherwise affect a sample likewise subsequently drawn in.
Inventors
- 👤 Palle-Finn Beer
- 👤 Kai Robert Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
An apparatus useful for measuring the optical properties of a liquid which comprises a cylinder having end wall portions, said cylinder having at least a portion thereof constructed of a transparent material, inlet means coupled to said cylinder through one of said end wall portions for introducing liquid into the cylinder, outlet means coupled to said cylinder through the other of said end wall portions a piston slidably mounted in said cylinder to define a first portion and a second portion in said cylinder, means for moving said piston, said first portion being adjacent to and communicating with said inlet means, and said second portion being adjacent to and communicating with said outlet means, a passageway through said piston communicating with said first and second portions, a valve means positioned in said passageway to close said passageway when the volume of said first portion is increased by movement of the piston and to open said passageway when the volume of said first portion is decreased by movement of the piston.
Claim 2
Independent Claim
170 words
An apparatus useful for measuring the optical properties of a liquid which comprises a cylinder having end wall portions, said cylinder having at least a portion thereof constructed of a transparent material, inlet means coupled to said cylinder through one of said end wall portions for introducing liquid into the cylinder, outlet means coupled to said cylinder through the other of said end wall portions a piston slidably mounted in said cylinder to define a first portion and a second portion in said cylinder, means for moving said piston, said first portion being adjacent to and communicating with said inlet means, and said second portion being adjacent to and communicating with said outlet means, a passageway through said piston communicating with said first and second portions, a valve means positioned in said passageway to close said passageway when the volume of said first portion is increased by movement of the piston and to open said passageway when the volume of said first portion is decreased by movement of the piston.
Claim 3
Dependent Claim
54 words
The apparatus of claim 1 wherein the first portion of said cylinder is of larger diameter than the second portion of said cylinder and said piston is comprised of a first piston section cooperating with the first portion of said cylinder and a second piston section cooperating with the second portion of said cylinder.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 wherein the passageway through the piston is in the form of a passage tube.
Claim 5
Dependent Claim
38 words
The apparatus of claim 3 wherein the valve means in said passage tube is a reversing valve for alternately connecting the second portion of the cylinder with the first portion of the cylinder or with the outlet means.
Claim 6
Dependent Claim
52 words
The apparatus of claim 4 wherein the valve means comprises a valve member fastened to said passage tube, a pair of valve seats movable relative to said valve member, one valve seat being positioned at the end of said outlet means and the other valve seat being fastened to said passage tube.
Claim 7
Dependent Claim
142 words
The apparatus of claim 4 further comprising an inner piston and wherein the outlet means is an outlet tube fastened to said inner piston, said outlet tube and said inner piston being movable relative to the piston and sealed thereagainst, said inner piston having an upper end surface joining the said second portion of the cylinder and having an area relative to the cross-sectional area of the outlet tube such that the outlet tube when entering the cylinder and during the part of the movement when one of the valve seats disengages the valve member and the other valve seat is brought into engagement with the valve member, the movement of the inner piston causes an increase in the free volume of the cylinder which is larger than the decrease of the free volume owing to the entering of the outlet tube.
Claim 8
Dependent Claim
28 words
The apparatus of claim 6 wherein said inner piston includes a lower end surface that delimits a closed space in the piston system which contAins a compressible medium.
Claim 9
Dependent Claim
56 words
The apparatus of claim 1 wherein the inlet means for introducing the liquid is a tubular pin and said tubular pin projects through the one of said end wall portions of said cylinder through the cylinder adjacent the cylindrical wall thereof, said end wall having a notch which connects with said tubular pin via radial conduits.
References Cited (Backward Citations)
US3364811A
Cited
US2827008A
Cited
US2866379A
Cited
US3246559A
Cited
US3225645A
Cited
US3520517A
Cited
US3448277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |