US3835335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level responsive control system
Assignee: Individual
•
Filing: 1973-08-13
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Granted: 1974-09-10
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Expires: 1993-08-13
Abstract
Abstract A U-tube is connected to a pressure vessel, the vessel and the U-tube containing an operating liquid, and the vessel also being connected to conduit means leading from a source of gas pressure. A bubbler tube is disposed in a container holding the controlling liquid, and is connected to the conduit means. The U-tube includes a sight glass portion having disposed therein a float containing magnetic means, which float rises and falls in response to the level of the controlling liquid in the container. Spaced, magnetically responsive switches are mounted on the Utube to be operated by the float, the switches being connected into a circuit for operating equipment controlled by the system.
Inventors
- 👤 J Robischon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:57
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/68; G01F23/70; G01F23/14; G01F23/16; G01F23/165; G01F23/168; G01L; G01L9/00; G01L9/0091; Y; Y10; Y10S; Y10S73/00; Y10S73/05
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A system for remotely operating equipment in response to the level of liquid within a container, said system including: a pressure vessel; a U-tube connected at one end thereof with said pressure vessel; operating liquid within said pressure vessel and said U-tube; a source of gas pressure; a bubbler tube disposed in said container; first conduit means connecting said source of gas pressure with said pressure vessel for placing said operating liquid under pressure; second conduit means connecting said first conduit means with said bubbler tube; a float within said U-tube, and containing magnetic means; at least two magnetically responsive switches mounted on said U-tube, and arranged to be operated by said magnetic means within said float when said float passes said switches during changes in the level of said operating fluid within said U-tube, said changes of level of said operating fluid occuring in response to the effect upon said bubbler tube of changing levels of liquid within said container; and circuit means connecting said switches with said equipment to be operated.
Claim 2
Independent Claim
173 words
A system for remotely operating equipment in response to the level of liquid within a container, said system including: a pressure vessel; a U-tube connected at one end thereof with said pressure vessel; operating liquid within said pressure vessel and said U-tube; a source of gas pressure; a bubbler tube disposed in said container; first conduit means connecting said source of gas pressure with said pressure vessel for placing said operating liquid under pressure; second conduit means connecting said first conduit means with said bubbler tube; a float within said U-tube, and containing magnetic means; at least two magnetically responsive switches mounted on said U-tube, and arranged to be operated by said magnetic means within said float when said float passes said switches during changes in the level of said operating fluid within said U-tube, said changes of level of said operating fluid occuring in response to the effect upon said bubbler tube of changing levels of liquid within said container; and circuit means connecting said switches with said equipment to be operated.
Claim 3
Dependent Claim
28 words
A system is recited in claim 1, wherein said U-tube is transparent at least over the region where said float operates to allow visual observation of said float.
Claim 4
Dependent Claim
52 words
A system as recited in claim 1, wherein said source of gas pressure comprises: a source of compressed air; regulator means connected between said source of compressed air and said first conduit; and a rotometer connected between said regulator means and said first conduit means, and including a visible flow indicating element.
Claim 5
Dependent Claim
38 words
A system as recited in claim 1, wherein at least three magnetically responsive switches are mounted upon said sight glass, said switches being effective to control different equipment in response to different levels of liquid within said container.
Claim 6
Dependent Claim
36 words
A system as recited in claim 1, including additionally: a recording pressure meter connected with one of said first and said second conduits, and effective to produce a charted record of pressure flucuations within the system.
Claim 7
Dependent Claim
37 words
A system as recited in claim 1, wherein said circuit means includes: holding means for maintaining a supply of current to said equIpment while said float moves from a first, ''''ON'''' switch to a second, ''''OFF'''' switch.
References Cited (Backward Citations)
US3200645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |