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US3699348A Expired / Lapsed US ⏱️ 0.0 years remaining

Radiation sensitive device for the successive investigation of several samples

Assignee: Carl Zeiss AG
•
Filing: 1971-08-06
•
Granted: 1972-10-17
•
Expires: 1991-08-06
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Abstract

Abstract An arrangement for the successive investigation of several samples by light passing through the sample comprises a vertically disposed flow cell the upper end of which is fixedly connected to a vertical tube surrounding a fixedly mounted piston. The lower end of the flow cell has a suction nipple attached thereto which upon downward movement of the flow cell relative to the fixed piston is immersed in one of the sample vessels which are arranged on a horizontally movable conveyor so that the liquid sample therein is drawn into the flow cell which is provided in its circular wall with two diametrically opposed windows through which the measuring light is adapted to pass for impinging a photo cell. An electric motor moves the vertical tube and therewith the flow cell and suction nipple thereon upwardly and downwardly and during the upward movement discharges the sample liquid in the flow cell into the vessel from which it was taken, whereupon the sample vessels are moved horizontally one step further until the next sample vessel comes into a position directly below the suction nipple on the flow cell.

Inventors

  • 👤 Gunther Hocherl

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/11; G01N35/00; G01N35/10; G01N2035/1027; G01N2035/1048; G01N2035/1062

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 178 words
An arrangement for the successive investigation of several samples by means of light passing through the sample, including a vertically disposed flow cell having a lower suction end, a vertical suction nipple connected with its upper end to said lower suction end, while an upper discharge end of said cell is fixedly connected with the lower end of a vertical tube, a stationary piston surrounded by said vertical tube, a source of light and a photocell, means for moving said tube and cell and nipple thereon upwardly and downwardly relative to said piston in such manner that in the lower end position of the flow cell said source of light causes a transverse passage of a measuring light beam from said light source through said cell, to said photocell sample vessels including said samples and means for moving said sample vessels horizontally relative to said suction nipple in the upper end position of this nipple, said suction nipple being caused to be immersed into one of said vessels at a time during the downward movement of said cell.
Claim 2
Dependent Claim 178 words
An arrangement for the successive investigation of several samples by means of light passing through the sample, including a vertically disposed flow cell having a lower suction end, a vertical suction nipple connected with its upper end to said lower suction end, while an upper discharge end of said cell is fixedly connected with the lower end of a vertical tube, a stationary piston surrounded by said vertical tube, a source of light and a photocell, means for moving said tube and cell and nipple thereon upwardly and downwardly relative to said piston in such manner that in the lower end position of the flow cell said source of light causes a transverse passage of a measuring light beam from said light source through said cell, to said photocell sample vessels including said samples and means for moving said sample vessels horizontally relative to said suction nipple in the upper end position of this nipple, said suction nipple being caused to be immersed into one of said vessels at a time during the downward movement of said cell.
Claim 3
Dependent Claim 21 words
An arrangement according to claim 1, in which said flow cell, said tube and said suction nipple constitute a structural unit.
Claim 4
Dependent Claim 45 words
An arrangement according to claim 1, including an electric motor for effecting the upward and downward movement of said tube, and an abutment on said tube which, after the end positions of the tube are reached, actuates respective limit switches and switches off the motor.
Claim 5
Dependent Claim 39 words
An arrangement according to claim 1, including an electric motor for horizontally moving the sample vessels, after the tube and the cell and suction nipple thereon have been moved upwardly and the nipple is moved outwardly of the vessels.
Claim 6
Dependent Claim 34 words
An arrangement according to claim 1, in which the lower suction end of the suction nipple is conical and the sample vessels have conical bottoms facing upwardly toward the conical end of said nipple.
Claim 7
Dependent Claim 29 words
An arrangement according to claim 1, in which at least the suction nipple is made of a highgrade steel, and the upper ends of the sample vessels are sealed.

References Cited (Backward Citations)

US3246559A Cited
US3266322A Cited
US3418080A Cited
US3607094A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-17 1976-04-17 1976-10-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-17 1980-04-17 1980-10-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-17 1984-04-17 1984-10-17 $7700.00 Window Closed / Lapsed

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