US3731184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deformable pick up coil and cooperating magnet for measuring physical quantities, with means for rendering coil output independent of orientation
Assignee: Individual
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Filing: 1970-11-24
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Granted: 1973-05-01
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Expires: 1990-11-24
Abstract
Abstract A device is disclosed for the measurement of cross-sectional area, volume, and related quantities, as well as physical quantities which can be transformed into area, volume, and the like, and mathematical functions of such quantities. It comprises a deformable pick-up conductor disposed in a magnetic field, which field may be produced externally, or by passing current through the pick-up conductor itself. A voltage is induced in the pick-up which is a function of its configuration, and of changes in this. Means are disclosed for rendering the output of the device independent of the orientation of the pick-up, comprising variously the use of at least one auxiliary coil, linked to the pick-up, for producing a reference signal, the use of magnetic fields which are capable of change in orientation and may scan or track with the pick-up, and the use of a plurality of magnetic fields.
Inventors
- 👤 H Goldberg
- 👤 M Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/32; A; A61; A61B; A61B5/00; A61B5/05; A61B5/053; A61B5/0535; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/2006; G01F; G01F1/00; G01F1/56; G01F1/58; G01L; G01L1/00; G01L1/14; G01L9/00; G01L9/0001; G01L9/0004
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
86 words
A device for the measurement of cross-sectional area and mathematical functions thereof, comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being disposed within said field, and being deformable, and conforming substantially to the configuration of an area being measured, output means electrically connected to said loop and responsive to voltages induced therein, and means for rendering the output independent of the orientation of said pick-up loop in said magnetic field.
Claim 2
Independent Claim
86 words
A device for the measurement of cross-sectional area and mathematical functions thereof, comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being disposed within said field, and being deformable, and conforming substantially to the configuration of an area being measured, output means electrically connected to said loop and responsive to voltages induced therein, and means for rendering the output independent of the orientation of said pick-up loop in said magnetic field.
Claim 3
Dependent Claim
58 words
A measuring device as in claim 1, wherein said means for rendering said output independent of the orientation of said pick-up loop comprises means for producing three non-coplanar alternating magnetic fields, and said output means comprises means for separating the voltages induced within said loop by each field and means for normalizing and vectorially adding said induced voltages.
Claim 4
Dependent Claim
40 words
A measuring device as in claim 2, wherein said three non-coplanar fields are mutually perpendicular, and said means for vectorially adding said induced voltages comprises means for producing the square root of the sum of the squares of said voltages.
Claim 5
Dependent Claim
37 words
A measuring device as in claim 1, wherein said means for rendering said output independent of the orientation of said pick-up loop comprises means for causing said magnetic field to scan said portion of said pick-up loop.
Claim 6
Dependent Claim
20 words
A measuring device as in claim 4, wherein said scanning means comprises means for causing rotation of said magnetic field.
Claim 7
Dependent Claim
79 words
A measuring device as in claim 1, wherein said means for rendering said output independent of the orientation of said pick-up comprises an auxiliary rigid pick-up coil system comprising at least one coil disposed within said same magnetic field, and fixed in orientation with respect to said pick-up, and means for effectively positioning said rigid coil system whereby a reference voltage is produced proportional to that of said pick-up when undeformed and independent of orientation in said magnetic field.
Claim 8
Dependent Claim
31 words
A measuring device as in claim 6, wherein said output means comprises means responsive to said reference voltage for producing outputs proportional to the ratio of said pick-up and reference voltages.
Claim 9
Dependent Claim
26 words
A measuring device as in claim 6, wherein said output means comprises means responsive to said reference voltage for controlling the sensitivity of said output means.
Claim 10
Dependent Claim
23 words
A measuring device as in claim 6, further comprising means responsive to said reference voltage for controlling the strength of said magnetic field.
Claim 11
Dependent Claim
23 words
A measuring device as in claim 6, further comprising means responsive to said reference voltage for controlling the direction of said magnetic field.
Claim 12
Dependent Claim
34 words
A measuring device as in claim 6, wherein said magnetic field is alternating, and further comprising means responsive to said reference voltage for controlling the rate of change of flux of said magnetic field.
Claim 13
Dependent Claim
37 words
A measuring device as in claim 1, wherein said magnetic field is alternating, and said output means is responsive to the component of said induced voltage which is in phase with the flux of said magnetic field.
Claim 14
Dependent Claim
41 words
A measuring device as in claim 1, wherein said magnetic field is alternating, and said output means is responsive to the component of said induced voltage which is 90* displaced in phase with respect to the flux of said magnetic field.
Claim 15
Dependent Claim
45 words
A measuring device as in claim 1, wherein said means for rendering said output independent of the orientation of said pick-up loop comprises means for causing said magneTic field to change its orientation together with any change in orientation of said portion of said loop.
Claim 16
Independent Claim
96 words
A device for the measurement of physical quantities and mathematical functions thereof comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with said physical quantity, and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, said device also including means for rendering its output independent of the orientation of said pick-up in said magnetic field.
Claim 17
Independent Claim
96 words
A device for the measurement of physical quantities and mathematical functions thereof comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with said physical quantity, and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, said device also including means for rendering its output independent of the orientation of said pick-up in said magnetic field.
Claim 18
Dependent Claim
110 words
A pressure measuring device comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with a pressure to be measured, and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, the said means for deforming said portion of said loop comprising an elastically deformable surface against which the pressure being measured is applied, the deformation of said surface, in response to said pressure, operatively deforming said portion of said loop.
Claim 19
Dependent Claim
110 words
A pressure measuring device comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with a pressure to be measured, and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, the said means for deforming said portion of said loop comprising an elastically deformable surface against which the pressure being measured is applied, the deformation of said surface, in response to said pressure, operatively deforming said portion of said loop.
Claim 20
Dependent Claim
116 words
A flowmeter for measuring flow of a fluid, comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with the flow of a fluid to be measured and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, the said means for deforming said portion of said loop comprising means adapted to hold said portion immersed in the fluid whose flow is being measured, with said portion disposed angularly with respect to the direction of said flow.
Claim 21
Dependent Claim
116 words
A flowmeter for measuring flow of a fluid, comprising a pick-up conductor having at least one loop, means for producing at least one magnetic field, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with the flow of a fluid to be measured and output means electrically connected to said loop and responsive to voltages induced therein by said magnetic field, the said means for deforming said portion of said loop comprising means adapted to hold said portion immersed in the fluid whose flow is being measured, with said portion disposed angularly with respect to the direction of said flow.
Claim 22
Dependent Claim
95 words
In a method of measuring cross-sectional area and related quantities, the steps of providing a pick-up conductor having at least one loop, at least one portion of said loop being deformable, positioning said portion in contact with an area to be measured and maintaining the configuration of said portion in conformance with said area, providing at least one magnetic field in intercepting relation with said portion, providing output means responsive to the voltages induced within said loop, and providing means for rendering the output independent of the orientation of said loop in said magnetic field.
Claim 23
Dependent Claim
95 words
In a method of measuring cross-sectional area and related quantities, the steps of providing a pick-up conductor having at least one loop, at least one portion of said loop being deformable, positioning said portion in contact with an area to be measured and maintaining the configuration of said portion in conformance with said area, providing at least one magnetic field in intercepting relation with said portion, providing output means responsive to the voltages induced within said loop, and providing means for rendering the output independent of the orientation of said loop in said magnetic field.
Claim 24
Independent Claim
97 words
A device for the measurement of physical quantities and mathematical functions thereof comprising a pickup conductor having at least one loop, means for producing at least one magnetic field, said magnetic field having an alternating component, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with said physical quantity, and output means electrically connected to said loop and responsive to the component of said induced voltages which is 90* displaced in phase with respect to the flux of said magnetic field.
Claim 25
Independent Claim
97 words
A device for the measurement of physical quantities and mathematical functions thereof comprising a pickup conductor having at least one loop, means for producing at least one magnetic field, said magnetic field having an alternating component, at least one portion of said loop being deformable and disposed within said field, means for deforming said portion of said loop in quantitative relationship with said physical quantity, and output means electrically connected to said loop and responsive to the component of said induced voltages which is 90* displaced in phase with respect to the flux of said magnetic field.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |