US3577108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular magnetoelastic transducer
Assignee: ABB Norden Holding AB
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Filing: 1969-09-08
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Granted: 1971-05-04
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Expires: 1989-09-08
Abstract
Abstract An annular magnetoelastic transducer has a core in the shape of a cylindrical ring. The core is manufactured by winding a striplike magnetostrictive material so that the plane of the strip is parallel to the central axis of the ring. In the core is a number of holes which are arranged substantially radially through the core. The holes are arranged in groups which are evenly distributed around the circumference of the core. In the holes there is a winding connected to a current source for generating a magnetic flux in the core and a winding connected to a measuring device for indicating the alterations of the magnetic flux which appears when the core is subjected to mechanical forces.
Inventors
- 👤 Waldemar Bengtson
- 👤 Orvar Dahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:03
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/12; G01L1/127; G01L1/125; Y; Y10; Y10S; Y10S73/00; Y10S73/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
Annular magnetoelastic transducer for converting a pressure to a corresponding electric signal and comprising a core of magnetostrictive material which is provided with windings to generate a magnetic flux in the core and to sense the flux alterations arising in the core when this is subjected to mechanical pressure, said core being wound helically from a striplike material into the shape of a cylindrical ring, the plane of the strip being parallel to the central axis of the ring, said ring having holes arranged substantially radially through the core, said windings being situated in said holes.
Claim 2
Dependent Claim
96 words
Annular magnetoelastic transducer for converting a pressure to a corresponding electric signal and comprising a core of magnetostrictive material which is provided with windings to generate a magnetic flux in the core and to sense the flux alterations arising in the core when this is subjected to mechanical pressure, said core being wound helically from a striplike material into the shape of a cylindrical ring, the plane of the strip being parallel to the central axis of the ring, said ring having holes arranged substantially radially through the core, said windings being situated in said holes.
Claim 3
Dependent Claim
47 words
Transducer according to claim 1, said holes for the windings being arranged in a certain number of groups evenly distributed around the circumference of the core, at least two holes in each group being arranged in the same plane perpendicular to the central axis of the core.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |