US3976963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer for a path tracer
Assignee: Individual
•
Filing: 1975-03-07
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Granted: 1976-08-24
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Expires: 1995-03-07
Abstract
Abstract A switching magnet is moveable along a row of magnetically operated switches and closes at least one switch opposite the magnet, which switches on a tap of a series circuit of resistors. The value of resistance is converted in an uninterrupted manner into an output of measured values dependent upon the position of the switching magnet.
Inventors
- 👤 Heinrich Kubler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:29
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/68; G01D; G01D5/00; G01D5/12; G01D5/25; G01D5/251; G01D5/2515; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34098
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A device for detecting and transmitting the position of a movable member along a measuring path, said device comprising: a tube positioned with respect to a fluid medium and having an axis parallel to a path to be measured; said tube having positioned therein a plurality of series connected resistors having taps therebetween; a plurality of normally open switches, each of said switches being connected at a first end thereof to a respective one of said taps, each said switches being connected at a second end thereof to a common measuring line; a movable member positioned in said fluid medium to move along said path, said movable member being mounted to be freely rotatable about an axis thereof parallel to said path; said movable member carrying therein switching magnet means for closing one only of said switches when said magnet means is positioned opposite such switch, and for closing two adjacent switches only when said magnet means is positioned opposite a space between such two adjacent switches; and indicating means, connected to said series connected resistors and to said common measuring line and responsive to a tapped resistance value across said common measuring line due to closing of switches, for indicating the position of said movable member along said path.
Claim 2
Independent Claim
210 words
A device for detecting and transmitting the position of a movable member along a measuring path, said device comprising: a tube positioned with respect to a fluid medium and having an axis parallel to a path to be measured; said tube having positioned therein a plurality of series connected resistors having taps therebetween; a plurality of normally open switches, each of said switches being connected at a first end thereof to a respective one of said taps, each said switches being connected at a second end thereof to a common measuring line; a movable member positioned in said fluid medium to move along said path, said movable member being mounted to be freely rotatable about an axis thereof parallel to said path; said movable member carrying therein switching magnet means for closing one only of said switches when said magnet means is positioned opposite such switch, and for closing two adjacent switches only when said magnet means is positioned opposite a space between such two adjacent switches; and indicating means, connected to said series connected resistors and to said common measuring line and responsive to a tapped resistance value across said common measuring line due to closing of switches, for indicating the position of said movable member along said path.
Claim 3
Dependent Claim
38 words
A device as claimed in claim 1, wherein said movable member is a ring-shaped element positioned around said tube, and said switching magnet is a ring-shaped permanent magnet magnetized such that the magnetic flux thereof extends radially thereof.
Claim 4
Dependent Claim
43 words
A device as claimed in claim 2, wherein said tube is positioned in a liquid medium, and said ring-shaped element is a float body floating in said liquid medium and freely movable along said tube dependent on the level of said liquid medium.
Claim 5
Dependent Claim
53 words
A device as claimed in claim 1, wherein said fluid medium comprises a fluid flowing through a pipe having a circular inner cross-section, said pipe being positioned adjacent said tube, and said movable member comprises a body having a circular cross-section and movable along said pipe dependent on the flow of said fluid.
Claim 6
Dependent Claim
152 words
A device as claimed in claim 1, wherein each of said switches are positioned in a separate sealed glass tube, said glass tubes are positioned on a first face of a flat insulated carrier strip, said carrier strip extending within said tube parallel to said path, said switches and respective glass tubes being parallelly aligned and extending at an acute angle to said path, connecting wires extending from opposite ends of each of said switches and through opposite ends of respective said glass tubes, said connecting wires extending through said carrier strip to a second face thereof, said common measuring line being positioned on said second face and connected to said connecting wires from said second ends of said switches, and said series connected resistors having taps therebetween being positioned on said second face with said connecting wires from said first ends of said switches being connected to respective of said taps.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |