Patent US3590843A successfully refreshed from Google Patents.
US3590843A
Expired / Lapsed
US
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Multiple-jet liquid level detector
Assignee: General Electric Co
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Filing: 1969-10-23
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Granted: 1971-07-06
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Expires: 1989-10-23
Abstract
Abstract The disclosure describes a fluid level detector in which two identical fluid jet devices, each comprising a fluid jet nozzle and a receiver, are placed in a fluid container. One such device is located below the nominal fluid level in the container and the other is located at the maximum desired fluid level therein. The degree of pressure recovery in each of the receivers depends upon the presence or absence of fluid at that device, and a differential pressure sensing means to sense differences in the recovered pressures is provided to indicate presence or absence of liquid at the upper device.
Inventors
- 👤 Arthur Stivers Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:06
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/005; G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/161; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/7287; Y10T137/731
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
In combination with a fluid container, a fluid level detector comprising: a pair of identical fluid jet devices which are mounted at different levels in said container, each said device comprising: an open structural frame, a fluid nozzle secured in one end of said frame, and a fluid receiver secured in the opposite end of said frame in axial alignment with said fluid nozzle and axially spaced therefrom; a source of pressurized fluid compatible with the fluid intended to be contained in said container; conduit means connecting said pressurized-fluid source with each said fluid nozzle; differential pressure indicating means having two input connections and an output means; and signal conduit means connecting said fluid receivers to different ones of said input connections; whereby the pressure differential which is detected by said indicating means will indicate the presence or absence of a predetermined fluid level in said container.
Claim 2
Dependent Claim
147 words
In combination with a fluid container, a fluid level detector comprising: a pair of identical fluid jet devices which are mounted at different levels in said container, each said device comprising: an open structural frame, a fluid nozzle secured in one end of said frame, and a fluid receiver secured in the opposite end of said frame in axial alignment with said fluid nozzle and axially spaced therefrom; a source of pressurized fluid compatible with the fluid intended to be contained in said container; conduit means connecting said pressurized-fluid source with each said fluid nozzle; differential pressure indicating means having two input connections and an output means; and signal conduit means connecting said fluid receivers to different ones of said input connections; whereby the pressure differential which is detected by said indicating means will indicate the presence or absence of a predetermined fluid level in said container.
Claim 3
Dependent Claim
45 words
The combination recited in claim 1 wherein the open portions of each said structural frame are covered with perforate screening, thereby allowing container fluid to be interposed between said fluid nozzles and said fluid receivers while attenuating signal disturbance affects of container fluid in motion.
Claim 4
Dependent Claim
97 words
The combination recited in claim 1 wherein said differential pressure indicating means comprises: a fluid amplifier which comprises a power nozzle, a pair of control ports oppositely disposed with respect to the axis of said power nozzle and adapted to issue control fluid streams to interact with the power stream issuing from said power nozzle and divert it from its axis, and a pair of output receivers oppositely disposed with respect to the axis of said power nozzle, said input connections comprising said control ports; indicating means; and means connecting said output receivers with said indicating means.
Claim 5
Dependent Claim
18 words
The combination recited in claim 3 wherein one of said signal conduits includes a variable resistance flow restrictor.
Claim 6
Dependent Claim
44 words
The combination recited in claim 4 wherein said fluid amplifier is a proportional amplifier and wherein said means connecting said output receivers with said indicating means includes a digital fluid amplifier whose control ports are connected to the output receivers of said proportional amplifier.
Claim 7
Dependent Claim
44 words
The combination recited in claim 5 wherein one of said fluid jet devices is mounted in said container below the minimum desired fluid level therein and the other of said fluid jet devices is mounted in said container at the maximum desired fluid level.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |