US3853006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid sensing systems
Assignee: TDK Micronas GmbH
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Filing: 1972-09-29
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Granted: 1974-12-10
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Expires: 1992-09-29
Abstract
Abstract A pair of vertically spaced bellows are employed with output means to produce a D.C. voltage directly proportional to the movement of the free end of one bellows. A conduit connects the two bellows together. The conduit and both bellows are filled with an incompressible fluid. The fixed ends of both bellows are fixed relative to each other. This arrangement may be employed with a D.C. voltmeter calibrated in linear measure to indicate the level of a liquid in a storage tank. In this case, one bellows is located inside of and fixed relative to the tank at the top. The other bellows is located inside the tank at the bottom and fixed relative thereto thereat. A two bellows densitometer is also provided which may be employed with or without the liquid level system.
Inventors
- 👤 V Lawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:28
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26; G01F; G01F23/00; G01F23/14; G01F23/18; G01L; G01L9/00; G01L9/0033; G01L9/0036; G01L9/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
381 words
A reservoir liquid level system, said system comprising: a tank to hold a fluid; first and second means fixed relative to said tank in positions inside thereof at the top and bottom thereof, respectively, said first and second means including first and second hollow shells, respectively, having first and second movable diaphragms, respectively, each of said first and second shells being sealed but having one opening thereinto; a first conduit having a first end sealed through the opening in said first shell and a second end sealed through the opening in said second shell, said first and secOnd diaphragms being depressible in accordance with the pressure at the respective upper and lower locations thereof; a first incompressible fluid filling said first conduit and both of said first and second shells; third means connected from one of said first and second diaphragms to produce an electrical output signal directly proportional to the difference between the pressures at the respective locations of said first and second diaphragms; fourth and fifth means fixed relative to said tank in positions adjacent the bottom of said tank, said fourth means being located above said fifth means and below said first means, said fourth and fifth means including fourth and fifth hollow shells, respectively, having fourth and fifth movable diaphragms, respectively, each of said fourth and fifth shells being sealed but having one opening thereinto; a second conduit having a first end sealed through the opening in said fourth shell and a second end sealed through the opening in said fifth shell, said fourth and fifth diaphragms being depressible in accordance with the pressure at the respective depths thereof; a second incompressible fluid filling said second conduit and both of said fourth and fifth shells; sixth means connected from one of said fourth and fifth diaphragms to produce an electrical output signal directly proportional to the difference between the pressures at the respective depths of said fourth and fifth diaphragms; a divider connected from the outputs of said third and sixth means for producing an output signal of a magnitude directly proportional to the ratio of the magnitude of the output signal of said third means to the magnitude of the output signal of said sixth means; and utilization means connected from the output of said divider.
Claim 2
Dependent Claim
381 words
A reservoir liquid level system, said system comprising: a tank to hold a fluid; first and second means fixed relative to said tank in positions inside thereof at the top and bottom thereof, respectively, said first and second means including first and second hollow shells, respectively, having first and second movable diaphragms, respectively, each of said first and second shells being sealed but having one opening thereinto; a first conduit having a first end sealed through the opening in said first shell and a second end sealed through the opening in said second shell, said first and secOnd diaphragms being depressible in accordance with the pressure at the respective upper and lower locations thereof; a first incompressible fluid filling said first conduit and both of said first and second shells; third means connected from one of said first and second diaphragms to produce an electrical output signal directly proportional to the difference between the pressures at the respective locations of said first and second diaphragms; fourth and fifth means fixed relative to said tank in positions adjacent the bottom of said tank, said fourth means being located above said fifth means and below said first means, said fourth and fifth means including fourth and fifth hollow shells, respectively, having fourth and fifth movable diaphragms, respectively, each of said fourth and fifth shells being sealed but having one opening thereinto; a second conduit having a first end sealed through the opening in said fourth shell and a second end sealed through the opening in said fifth shell, said fourth and fifth diaphragms being depressible in accordance with the pressure at the respective depths thereof; a second incompressible fluid filling said second conduit and both of said fourth and fifth shells; sixth means connected from one of said fourth and fifth diaphragms to produce an electrical output signal directly proportional to the difference between the pressures at the respective depths of said fourth and fifth diaphragms; a divider connected from the outputs of said third and sixth means for producing an output signal of a magnitude directly proportional to the ratio of the magnitude of the output signal of said third means to the magnitude of the output signal of said sixth means; and utilization means connected from the output of said divider.
Claim 3
Dependent Claim
19 words
The invention as defined in claim 1, wherein said utilization means includes a D.C. voltmeter calibrated in linear measure.
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 |