Patent US3293579A successfully refreshed from Google Patents.
US3293579A
Expired / Lapsed
US
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Liquid level indicator incorporating permanent magnets
Assignee: Acme Machine Works Inc
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Filing: 1965-04-23
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Granted: 1966-12-20
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Jay A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:47
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/68; G01F23/70; Y; Y10; Y10S; Y10S73/00; Y10S73/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
IN MEANS TO DETECT THE ARRIVAL OF A MEMBER AT A GIVEN POSITION ALONG A GIVEN PATH, THE COMBINATION OF: FIRST PERMANENT MAGNET MEANS GENERALLY ALIGNED WITH THE GIVEN PATH AT A LOCATION BEYOND THE GIVEN POSITION AND MOVABLE FROM A FIRST NORMAL POSITION TO A SECOND POSITION, THE FIRST PERMANENT MAGNET MEANS BEING BIASED TO SEEK ITS NORMAL FIRST POSITION; SECOND PERMANENT MAGNET MEANS CARRIED BY THE MEMBER, THE FIRST AND SECOND PERMANENT MAGNET MEANS BEING ORIENTED RELATIVE TO EACH OTHER TO CREATE A MAGNETIC FORCE THEREBETWEEN TO CAUSE THE FIRST PERMANENT MAGNET MEANS TO MOVE FROM ITS NORMAL FIRST POSITION TO ITS SECOND POSITION IN RESPONSE TO THE ARRIVAL OF THE MEMBER AT SAID GIVEN POSITION; AND THIRD PERMANENT MAGNET MEANS POSITIONED FOR ITS FLUX TO INTERACT DIRECTLY WITH THE FLUX OF THE SECOND PERMANENT MAGNET MEANS TO MODIFY THE EFFECT OF THE MAGNETIC FORCE BETWEEN THE FIRST AND SECOND PERMANENT MAGNET MEANS, SAID THIRD PERMANENT MAGNET MEANS BEING ADJUSTABLE TO VARY THE DEGREE TO WHICH ITS FLUX INTERACTS WITH THE FLUX OF THE SECOND PERMANENT MAGNET MEANS.
Claim 2
Dependent Claim
180 words
IN MEANS TO DETECT THE ARRIVAL OF A MEMBER AT A GIVEN POSITION ALONG A GIVEN PATH, THE COMBINATION OF: FIRST PERMANENT MAGNET MEANS GENERALLY ALIGNED WITH THE GIVEN PATH AT A LOCATION BEYOND THE GIVEN POSITION AND MOVABLE FROM A FIRST NORMAL POSITION TO A SECOND POSITION, THE FIRST PERMANENT MAGNET MEANS BEING BIASED TO SEEK ITS NORMAL FIRST POSITION; SECOND PERMANENT MAGNET MEANS CARRIED BY THE MEMBER, THE FIRST AND SECOND PERMANENT MAGNET MEANS BEING ORIENTED RELATIVE TO EACH OTHER TO CREATE A MAGNETIC FORCE THEREBETWEEN TO CAUSE THE FIRST PERMANENT MAGNET MEANS TO MOVE FROM ITS NORMAL FIRST POSITION TO ITS SECOND POSITION IN RESPONSE TO THE ARRIVAL OF THE MEMBER AT SAID GIVEN POSITION; AND THIRD PERMANENT MAGNET MEANS POSITIONED FOR ITS FLUX TO INTERACT DIRECTLY WITH THE FLUX OF THE SECOND PERMANENT MAGNET MEANS TO MODIFY THE EFFECT OF THE MAGNETIC FORCE BETWEEN THE FIRST AND SECOND PERMANENT MAGNET MEANS, SAID THIRD PERMANENT MAGNET MEANS BEING ADJUSTABLE TO VARY THE DEGREE TO WHICH ITS FLUX INTERACTS WITH THE FLUX OF THE SECOND PERMANENT MAGNET MEANS.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |