US3971253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow meter with a magnetic field-dependent resistor arrangement
Assignee: Siemens AG
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Filing: 1975-06-19
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Granted: 1976-07-27
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Expires: 1995-06-19
Abstract
Abstract The invention is a flow meter comprising a magnetic field-dependent resistor arrangement whose resistances are controlled by a particularly configured control member. More specifically, the position of the control member controls the degree of flux passing from the permanent magnet of the resistor arrangement through the two magnetic field dependent resistors of the arrangement. The resistance values of the resistors thus vary as a function of the position of a control member. According to the invention, the control member comprises a throttle plate having one end clamped elastically to the flow chamber of the meter and the other end within and free to move with the medium flowing in the chamber. In this manner, by varying the pressure head of the flowing medium, the amplitude of motion of the throttle plate, and, hence, the resistance values controlled thereby are varied. A sensitive flow meter having a simple construction is thus realized.
Inventors
- 👤 Paul Hini
- 👤 Bernt Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A flow meter for use with a flowing medium comprising: a housing having a channel therein through which said medium can flow; a field dependent resistor arrangement including: a permanent magnet; and first and second magnetoresistive field plates arranged to be in the magnetic flux of said magnet; and a ferromagnetic control member for varying the degree of said flux permeating each of said plates, said control member including: a throttle plate extending into said channel, said throttle plate having one end elastically clamped to said housing and a portion which is within the magnetic flux of said magnet.
Claim 2
Dependent Claim
99 words
A flow meter for use with a flowing medium comprising: a housing having a channel therein through which said medium can flow; a field dependent resistor arrangement including: a permanent magnet; and first and second magnetoresistive field plates arranged to be in the magnetic flux of said magnet; and a ferromagnetic control member for varying the degree of said flux permeating each of said plates, said control member including: a throttle plate extending into said channel, said throttle plate having one end elastically clamped to said housing and a portion which is within the magnetic flux of said magnet.
Claim 3
Dependent Claim
18 words
A flow meter in accordance with claim 1 in which said throttle plate comprises a thin elastic disc.
Claim 4
Dependent Claim
111 words
A flow meter for use with flowing medium comprising: a housing having a channel therein through which said medium can flow; a field dependent resistor arrangement including: a permanent magnet; and first and second magnetorestive field plates arranged to be in the magnetic flux of said magnet; and a ferromagnetic control member for varying the degree of flux permeating each of said plates, said control member including: a frame-shaped throttle plate which encloses said resistor arrangement, said throttle plate having an end which extends into said channel and a portion which is within the magnetic flux of said magnet, and including torsion spring-like members for mounting said plate to said housing.
Claim 5
Dependent Claim
111 words
A flow meter for use with flowing medium comprising: a housing having a channel therein through which said medium can flow; a field dependent resistor arrangement including: a permanent magnet; and first and second magnetorestive field plates arranged to be in the magnetic flux of said magnet; and a ferromagnetic control member for varying the degree of flux permeating each of said plates, said control member including: a frame-shaped throttle plate which encloses said resistor arrangement, said throttle plate having an end which extends into said channel and a portion which is within the magnetic flux of said magnet, and including torsion spring-like members for mounting said plate to said housing.
Claim 6
Dependent Claim
39 words
A flow meter in accordance with claim 3 in which said torsion spring-like members are connected to said housing such that the points of connection are on a line that passes through the center of gravity of said plate.
References Cited (Backward Citations)
US3164018A
Cited
US3287968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |