Patent US3680393A successfully refreshed from Google Patents.
US3680393A
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US
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Accelerometer
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1969-10-27
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Granted: 1972-08-01
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Expires: 1989-10-27
Abstract
Abstract An accelerometer in which a pendulum is normally aligned in a gap defined by a pair of spaced magnets, and is adapted to move relative to the magnets in response to an acceleration and generate a signal. A magnetic field is created in proportion to the signal which interacts with the magnetic flux from the magnets, causing the pendulum to realign, and the flux level from each magnet can be regulated in order to compensate for nonlinearities.
Inventors
- 👤 Herbert Rogall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:42
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/13; G01P15/132
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
An accelerometer comprising at least one magnet, a movable member normally aligned in proximity to said magnet and adapted to move relative to said magnet in response to an acceleration, means for generating a signal in response to said movement, means for creating a magnetic flux in response to said signal for interaction with the magnetic flux produced by said magnet in a manner to realign said movable member, and means to regulate the flux level produced by said magnet, wherein said means for generating a signal in response to said movement is in the form of a first coiled conductor fixed with respect to said movable member and a second coiled conductor fixed with respect to said magnet and conducting an electrical current, whereby said movement of said first conductor induces a voltage therein, and wherein said means for creating a magnetic flux comprises a third coiled conductor carried by said movable member and connected in circuit with said first coiled conductor, and whereby said means to regulate said flux level comprises a fourth electrical conductor coiled around said magnet and connected in circuit with said first and third conductors.
Claim 2
Dependent Claim
191 words
An accelerometer comprising at least one magnet, a movable member normally aligned in proximity to said magnet and adapted to move relative to said magnet in response to an acceleration, means for generating a signal in response to said movement, means for creating a magnetic flux in response to said signal for interaction with the magnetic flux produced by said magnet in a manner to realign said movable member, and means to regulate the flux level produced by said magnet, wherein said means for generating a signal in response to said movement is in the form of a first coiled conductor fixed with respect to said movable member and a second coiled conductor fixed with respect to said magnet and conducting an electrical current, whereby said movement of said first conductor induces a voltage therein, and wherein said means for creating a magnetic flux comprises a third coiled conductor carried by said movable member and connected in circuit with said first coiled conductor, and whereby said means to regulate said flux level comprises a fourth electrical conductor coiled around said magnet and connected in circuit with said first and third conductors.
Claim 3
Dependent Claim
27 words
The accelerometer of claim 1 wherein there are two magnets spaced apart to form a gap and wherein said movable member is normally aligned in said gap.
Claim 4
Dependent Claim
24 words
The accelerometer of claim 1 further comprising a variable resistance connected in parallel with said fourth conductor and adapted to regulate the current thereto.
Claim 5
Dependent Claim
41 words
The accelerometer of claim 1 wherein said fourth electrical conductor has terminals arranged so as to be connected to an external source of electrical current to adjust the operating point of said magnet and therefore the scale factor of said accelerometer.
Claim 6
Dependent Claim
149 words
An accelerometer comprising at least one magnet, a movable member normally aligned in proximity to said magnet and adapted to move relative to said magnet in response to an acceleration, means for generating a signal in response to said movement, means for creating a magnetic flux in response to said signal for interaction with the magnetic flux produced by said magnet in a manner to realign said movable member, and means to regulate the flux level produced by said magnet, wherein said means for generating a signal in response to said movement comprises transducer means fixed with respect to said movable member and with respect to said magNet, and wherein said means to regulate said flux level comprises a coiled electrical current carrying conductor connected in circuit with said transducer means and disposed in proximity to said magnet and adapted to conduct a current in proportion to said signal.
Claim 7
Dependent Claim
149 words
An accelerometer comprising at least one magnet, a movable member normally aligned in proximity to said magnet and adapted to move relative to said magnet in response to an acceleration, means for generating a signal in response to said movement, means for creating a magnetic flux in response to said signal for interaction with the magnetic flux produced by said magnet in a manner to realign said movable member, and means to regulate the flux level produced by said magnet, wherein said means for generating a signal in response to said movement comprises transducer means fixed with respect to said movable member and with respect to said magNet, and wherein said means to regulate said flux level comprises a coiled electrical current carrying conductor connected in circuit with said transducer means and disposed in proximity to said magnet and adapted to conduct a current in proportion to said signal.
Claim 8
Dependent Claim
23 words
The accelerometer of claim 5 further comprising a variable resistance connected in parallel with said conductor and adapted to regulate the current thereto.
Claim 9
Dependent Claim
39 words
The accelerometer of claim 5 wherein said conductor has terminals arranged so as to be connected to an external source of electrical current to adjust the operation point of said magnet and therefore the scale factor of said accelerometer.
Claim 10
Dependent Claim
24 words
The accelerometer of claim 5 wherein said movable member is in the form of a pendulous mass adapted to oscillate relative to said magnet.
References Cited (Backward Citations)
US2888256A
Cited
US2985021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |