US3863501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostrictive sensor for a flowmeter
Assignee: Honeywell Inc
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Filing: 1973-12-19
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Granted: 1975-02-04
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Expires: 1993-12-19
Abstract
Abstract A thin film magnetostrictive sensor for a fluid flowmeter comprising a spring wire of beryllium copper having plated thereon an anisotropic thin film of magnetostrictive nickeliron.
Inventors
- 👤 John E Janssen
- 👤 Vahram S Kardashian
- 👤 Paul Antonio Corbero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:47
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/32; G01F1/325; G01F1/3259; G01F1/3266; Y; Y10; Y10S; Y10S73/00; Y10S73/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A flowmeter of the type having a turbulence induced therein which has an oscillatory type component, the repetition rate of which is a function of flow rate, the combination comprising: a magnetostrictive flow sensing means comprising a length of spring wire having plated thereon a magnetically anisotropic magnetostrictive thin-film, means mounting said wire to extend into a fluid flow path, whereby the oscillatory type component of flow causes a vibratory deflection of said plated wire, the frequency of said vibratory deflection being a function of flow rate, and a.c. generator means for energizing said plated wire with a carrier type wave and wherein said vibratory deflection of said wire effects a modulation of said carrier wave, said plated wire further having terminal means connected to frequency responsive signal output measuring means.
Claim 2
Dependent Claim
131 words
A flowmeter of the type having a turbulence induced therein which has an oscillatory type component, the repetition rate of which is a function of flow rate, the combination comprising: a magnetostrictive flow sensing means comprising a length of spring wire having plated thereon a magnetically anisotropic magnetostrictive thin-film, means mounting said wire to extend into a fluid flow path, whereby the oscillatory type component of flow causes a vibratory deflection of said plated wire, the frequency of said vibratory deflection being a function of flow rate, and a.c. generator means for energizing said plated wire with a carrier type wave and wherein said vibratory deflection of said wire effects a modulation of said carrier wave, said plated wire further having terminal means connected to frequency responsive signal output measuring means.
Claim 3
Dependent Claim
13 words
The invention according to claim 1 wherein said wire is beryllium-copper spring wire.
Claim 4
Dependent Claim
20 words
The invention according to claim 1 wherein the thickness of said wire plating is in the order of 10,000 angstroms.
Claim 5
Dependent Claim
15 words
The invention according to claim 1 wherein said thin-film plating is of a nickel-iron alloy.
Claim 6
Dependent Claim
19 words
The invention according to claim 1 wherein said frequency responsive signal output measuring means includes detector and amplifier means.
Claim 7
Dependent Claim
32 words
The invention according to claim 1 wherein said magnetostrictive flow sensing means further comprises a drag body attached to said spring wire to augment deflection of said wire in response to flow.
Claim 8
Dependent Claim
134 words
A sensor apparatus for a fluid flowmeter comprising: a length of non-magnetic spring wire plated with an anisotropic magnetic thin-film which is highly non-zero magnetostrictive for a sensor, wherein the plating on one half of circumference of said wire differs materially in magnetostriction from that of the opposite half of circumference; means including a source of high frequency carrier energy connected to energize said sensor wire; means mounting said sensor wire such that at least a portion of said wire extends into a fluid flow path to be metered, said sensor wire being subject to bending as a function of fluid flow, the bending of said energized sensor wire providing an output signal; and output means including detector means connected to receive an output signal from said sensor wire and providE an indication thereof.
Claim 9
Dependent Claim
134 words
A sensor apparatus for a fluid flowmeter comprising: a length of non-magnetic spring wire plated with an anisotropic magnetic thin-film which is highly non-zero magnetostrictive for a sensor, wherein the plating on one half of circumference of said wire differs materially in magnetostriction from that of the opposite half of circumference; means including a source of high frequency carrier energy connected to energize said sensor wire; means mounting said sensor wire such that at least a portion of said wire extends into a fluid flow path to be metered, said sensor wire being subject to bending as a function of fluid flow, the bending of said energized sensor wire providing an output signal; and output means including detector means connected to receive an output signal from said sensor wire and providE an indication thereof.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |