US3698238A
Expired / Lapsed
US
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Fluid testing apparatus
Assignee: Plessey Handel und Investments AG
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Filing: 1971-02-09
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Granted: 1972-10-17
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Expires: 1991-02-09
Abstract
Abstract Fluid testing apparatus comprising a number of sensor cells serially connected in a fluid pipe-line each responsive to a particular characteristic of a fluid passed therethrough and a store for calibration liquid, from which calibration liquid is released to the sensor cells, consequent upon the operation of a valve. The apparatus may also comprise a further valve which is operated when fluid of a particular characteristic is detected so that this fluid can be stored for subsequent analysis.
Inventors
- 👤 Reginald Victor Wall
- 👤 Harold Rodney Sven Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:51
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
Fluid testing apparatus comprising a plurality of sensor cells serially connected in a fluid pipe-line, means operatively associated with the cells for providing an indication in respect of predetermined characteristics of a fluid passed through the cells, a store for calibration fluid and valve means operatively associated with the sensor cells such that fluids to be tested or alternatively fluid from the said store may be passed through the sensor cells in accordance with the operative state of the valve means.
Claim 2
Dependent Claim
81 words
Fluid testing apparatus comprising a plurality of sensor cells serially connected in a fluid pipe-line, means operatively associated with the cells for providing an indication in respect of predetermined characteristics of a fluid passed through the cells, a store for calibration fluid and valve means operatively associated with the sensor cells such that fluids to be tested or alternatively fluid from the said store may be passed through the sensor cells in accordance with the operative state of the valve means.
Claim 3
Dependent Claim
44 words
Fluid testing apparatus as claimed in claim 1, comprising a control valve operative when a predetermined characteristic is sensed by a sensor cell for diverting fluid passed through the cells possessing said characteristic, and a fluid storage container into which such fluid is diverted.
Claim 4
Dependent Claim
31 words
Fluid testing apparatus as claimed in claim 2, including electronic interfaces, one for each cell, and indicator means, signals from said cells being passed via said interfaces to said indicator means.
Claim 5
Dependent Claim
28 words
Fluid testing apparatus as claimed in claim 3, comprising a data logger, and switch means via which signals from said interfaces are fed sequentially to said data logger.
Claim 6
Dependent Claim
32 words
Fluid testing apparatus as claimed in claim 4, including timing means providing control signals for the switch means to facilitate sequential operation of said switch means in accordance with a predetermined programme.
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) | 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 |