US4658647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerometer
Assignee: Japan Aviation Electronics Industry Ltd
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Filing: 1985-06-17
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Granted: 1987-04-21
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Expires: 2005-06-17
Abstract
Abstract An accelerometer comprises a pair of stators, a permanent magnet arranged within each of the stators, arcuate support portions diametrically opposed to each other on the surface of each stator, a pair of ring members each of which is positioned on the arcuate support portions of a stator, and a support ring with a flapper interposed between the support ring members. The flapper is connected to the supporting ring by two hinge portions. On each side of the flapper is a bobbin on which a coil is wound, the coils being connected to an external circuit. All of the component elements of the accelerometer are constructed and designed so as to avoid stress depending upon a change in ambient temperature.
Inventors
- 👤 Yasuo Shintani
- 👤 Kazuhiro Sakuma
- 👤 Hisashi Yabe
- 👤 Hirohito Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:35
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/006; G01P15/00; G01P15/02; G01P15/08; G01P2015/0805; G01P2015/0822; G01P2015/0825; G01P2015/0828
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
An accelerometer comprising: a magnetic assembly having a first stator and a second stator; a pair of diametrically opposed arcuate support portions formed on a surface of each of said first and second stators; a pair of ring members each arranged in contact with said support portions of one of said stators; acceleration detecting means comprising a flapper made of cobalt-nickel alloy and a support ring member of non-magnetic metal, said support ring member being mounted between said ring members, said flapper being connected by two spaced hinge portions to said support ring member, and a bobbin having a coil wound thereon mounted on each opposed surface of the flapper, said bobbins being mounted on a support of the same material as or a material having the same coefficient of expansion as that of said flapper, each said coil being connected to a conductor of an external circuit at a portion on a transverse center line extending through the center of each of said two hinge portions; and a permanent magnet and a U-shaped pickoff means attached to each of said stators, said magnets being arranged so that poles of the same polarity are directed towards one another.
Claim 2
Dependent Claim
198 words
An accelerometer comprising: a magnetic assembly having a first stator and a second stator; a pair of diametrically opposed arcuate support portions formed on a surface of each of said first and second stators; a pair of ring members each arranged in contact with said support portions of one of said stators; acceleration detecting means comprising a flapper made of cobalt-nickel alloy and a support ring member of non-magnetic metal, said support ring member being mounted between said ring members, said flapper being connected by two spaced hinge portions to said support ring member, and a bobbin having a coil wound thereon mounted on each opposed surface of the flapper, said bobbins being mounted on a support of the same material as or a material having the same coefficient of expansion as that of said flapper, each said coil being connected to a conductor of an external circuit at a portion on a transverse center line extending through the center of each of said two hinge portions; and a permanent magnet and a U-shaped pickoff means attached to each of said stators, said magnets being arranged so that poles of the same polarity are directed towards one another.
Claim 3
Dependent Claim
18 words
An accelerometer as claimed in claim 1 in which said support ring member is made of cobalt-nickel alloy.
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) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |