US3854088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counting and analysis apparatus for particles suspended in an electrolytic liquid
Assignee: Rheinmetall Air Defence AG
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Filing: 1973-11-12
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Granted: 1974-12-10
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Expires: 1993-11-12
Abstract
Abstract A counting- and analysis apparatus for particles suspended in an electrolytic liquid, wherein the suspension flows through a bore having a predetermined diameter and functioning as an electrical resistance measurement path or aperture. A respective electrode is arranged at each side of the measurement path and there is provided a connection conduit from the space in front of the measurement path to a sample container. A direct current supply electrode is arranged in the sample container in such a manner that the gas bubbles which are formed thereat do not arrive in the connection conduit and that at least in the compartment or space in front of the measurement path there is provided an auxiliary electrode for tapping-off the voltage fluctuations which are generated during passage of the particles through the aperture or measurement path.
Inventors
- 👤 H Gahwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1031; G01N15/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A counting- and analysis apparatus for particles suspended in an electrolytic liquid, comprising a sample container for the liquid, a conductivity cell, said conductivity cell being provided with means defining a bore having a predetermined diameter and serving as an electrical resistance measurement path through which flows the suspension, a respective electrode arranged to each side of said measurement path, said conductivity cell including a compartment arranged in front of the measurement path, a connection conduit leading from said compartment in front of said measurement path to said sample container, one of said respective electrodes comprising a direct-current supply electrode carried by the connection conduit and arranged in the sample container such that the gas bubbles formed thereat do not enter the connection conduit, and an auxiliary electrode arranged at least in the compartment in front of the measurement path for tapping-off the voltage fluctuations which are generated durIng passage of the particles through the measurement path.
Claim 2
Dependent Claim
157 words
A counting- and analysis apparatus for particles suspended in an electrolytic liquid, comprising a sample container for the liquid, a conductivity cell, said conductivity cell being provided with means defining a bore having a predetermined diameter and serving as an electrical resistance measurement path through which flows the suspension, a respective electrode arranged to each side of said measurement path, said conductivity cell including a compartment arranged in front of the measurement path, a connection conduit leading from said compartment in front of said measurement path to said sample container, one of said respective electrodes comprising a direct-current supply electrode carried by the connection conduit and arranged in the sample container such that the gas bubbles formed thereat do not enter the connection conduit, and an auxiliary electrode arranged at least in the compartment in front of the measurement path for tapping-off the voltage fluctuations which are generated durIng passage of the particles through the measurement path.
Claim 3
Dependent Claim
62 words
The counting- and analysis apparatus as defined in claim 1, wherein said connection conduit incorporates a hollow suction needle provided for the conductivity cell and extending into the sample container, said hollow suction needle incorporating a tip, and said direct-current supply electrode being arranged in a ring-shaped manner at the outside of the region of the tip of the hollow suction needle.
Claim 4
Dependent Claim
29 words
The counting- and analysis apparatus as defined in claim 1, further including an alternating-current shorting and direct-current suppressing element for connecting the auxiliary electrode with the direct-current supply electrode.
Claim 5
Dependent Claim
16 words
The counting- and analysis apparatus as defined in claim 3, wherein said element is a capacitor.
Claim 6
Dependent Claim
45 words
The counting- and analysis apparatus as defined in claim 4, wherein said conductivity cell contains the direct-current supply electrode, the auxiliary electrode, an electrode defining the other of said respective electrodes arranged after the measurement path, the capacitor and its electrical connection lines and terminals.
Claim 7
Dependent Claim
137 words
In a counting- and analysis apparatus for particles suspended in an electrolytic liquid, comprising a sample container for the liquid, a conductivity cell, said conductivity cell being provided with means defining a bore having a predetermined diameter and serving as an electrical resistance measurement path through which flows the suspension, said conductivity cell including a compartment arranged in front of the measurement path, a connection conduit leading from said compartment in front of said measurement path to said sample container, the improvement comprising a direct-current supply electrode means arranged at the connection conduit in the sample container for preventing gas bubbles formed thereat from reaching the interior of the connection conduit, and an auxiliary electrode means arranged in front of the measurement path for removing voltage fluctuations generated during passage of the particles through the measurement path.
Claim 8
Dependent Claim
137 words
In a counting- and analysis apparatus for particles suspended in an electrolytic liquid, comprising a sample container for the liquid, a conductivity cell, said conductivity cell being provided with means defining a bore having a predetermined diameter and serving as an electrical resistance measurement path through which flows the suspension, said conductivity cell including a compartment arranged in front of the measurement path, a connection conduit leading from said compartment in front of said measurement path to said sample container, the improvement comprising a direct-current supply electrode means arranged at the connection conduit in the sample container for preventing gas bubbles formed thereat from reaching the interior of the connection conduit, and an auxiliary electrode means arranged in front of the measurement path for removing voltage fluctuations generated during passage of the particles through the measurement path.
References Cited (Backward Citations)
SU274474A1
Cited
US3299354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |