Patent US3596144A successfully refreshed from Google Patents.
US3596144A
Expired / Lapsed
US
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Automatic magnet charger and calibration system
Assignee: F W BELL Inc
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Filing: 1968-10-31
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Granted: 1971-07-27
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Expires: 1988-10-31
Abstract
Abstract The invention is for an automatic magnet charger and calibration system utilizing a magnet charger to saturate the magnetic materials, an AC demagnetizing unit to stabilize the magnets, and a Hall effect gaussmeter to continuously monitor the DC component of magnetism in the presence of the large AC pull-back signal. Reference is made to the claims for a legal definition of the invention.
Inventors
- 👤 George J Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:08
CPC Classifications
H; H01; H01F; H01F13/00; H01F13/003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
An automatic magnet charger and calibration system, the improvement comprising: impulse magnetizing means to saturate said magnet, means to continuously measure the amount of magnetic flux density in said magnet, means to demagnetize said magnet to a predetermined stabilized magnetic flux density, and automatic control means connected to said demagnetizing means and to said continuous measuring means for deactivating said demagnetization means when said preDetermined magnetic flux density is obtained.
Claim 2
Dependent Claim
70 words
An automatic magnet charger and calibration system, the improvement comprising: impulse magnetizing means to saturate said magnet, means to continuously measure the amount of magnetic flux density in said magnet, means to demagnetize said magnet to a predetermined stabilized magnetic flux density, and automatic control means connected to said demagnetizing means and to said continuous measuring means for deactivating said demagnetization means when said preDetermined magnetic flux density is obtained.
Claim 3
Dependent Claim
77 words
An automatic magnet charger and calibration system as set forth in claim 1 wherein said impulse magnetizing means to saturate said magnet includes a source of energy, means for storing said energy, a charging fixture coil, switching means for electrically isolating said energy storage means from said fixture coil until energy sufficient to saturate said magnet has been stored in said storage means, and means controlling the switching means and signalling the discharge of said stored energy.
Claim 4
Dependent Claim
31 words
An automatic magnet charger and calibration system as set forth in claim 2 wherein said source of energy comprises means to convert AC power to DC power in a controlled manner.
Claim 5
Dependent Claim
22 words
An automatic magnet charger and calibration system as set forth in claim 2 wherein said means for storing said energy comprises capacitors.
Claim 6
Dependent Claim
61 words
An automatic magnet charger and calibration system as set forth in claim 1 wherein said magnetizing means further comprises means to electrically isolate said source of energy from said means for storing said energy, and means for electrically isolating said energy storage means from said fixture coil until energy sufficient to saturate said magnet has been stored in said storage means.
Claim 7
Dependent Claim
42 words
An automatic magnet charger and calibration system as set forth in claim 2 wherein said magnetizing means further comprises means to provide a signal to said automatic control means from said means controlling said switching means when said magnet has reached saturation.
Claim 8
Dependent Claim
35 words
An automatic magnet charger and calibration system as set forth in claim 1 wherein said means to demagnetize said magnet to said predetermined stabilized magnetic flux density further comprises an alternating current source of power.
Claim 9
Dependent Claim
33 words
An automatic magnet charger and calibration system as set forth in claim 7 wherein said demagnetization means further comprises means to control the amount of said AC power utilized to demagnetize said magnet.
Claim 10
Dependent Claim
94 words
An automatic magnet charger and calibration system as set forth in claim 1 wherein said means to automatically control and interrelate said first three mentioned means comprises said first mentioned means magnetizing said magnet to saturation, said control means utilizing said magnetic flux density measuring means to confirm that saturation has been attained, said control means activating said demagnetization means, said measuring means continuously indicating to said control means the amount of magnetic flux density in said magnet, said control means deactivating said demagnetization means when said predetermined stabilized magnetic flux density is obtained.
Claim 11
Dependent Claim
78 words
An automatic magnet charger and calibration system, the improvement comprising: impulse magnetizing means to saturate said magnet, means to continuously measure the amount of magnet flux density in said magnet, said measuring means comprising a Hall effect gaussmeter, means to demagnetize said magnet to a predetermined stabilized magnetic flux density, and automatic control means connected to said demagnetizing means and to said continuous measuring means for deactivating said demagnetization means when said predetermined magnetic flux density is obtained.
Claim 12
Dependent Claim
78 words
An automatic magnet charger and calibration system, the improvement comprising: impulse magnetizing means to saturate said magnet, means to continuously measure the amount of magnet flux density in said magnet, said measuring means comprising a Hall effect gaussmeter, means to demagnetize said magnet to a predetermined stabilized magnetic flux density, and automatic control means connected to said demagnetizing means and to said continuous measuring means for deactivating said demagnetization means when said predetermined magnetic flux density is obtained.
Claim 13
Dependent Claim
36 words
An automatic magnet charger and calibration system as set forth in claim 10 wherein said gaussmeter further comprises means to suppress AC fields approximately two orders of magnitude greater than the DC field of said magnet.
Claim 14
Dependent Claim
51 words
An automatic magnet charger and calibration system as set forth in claim 10 wherein said gaussmeter further comprises means to provide a signal to said automatic control means indicating the demagnetization of said magnet, said signal comprising a flux-proportional output voltage which is calibrated to said flux density in said magnet.
Claim 15
Dependent Claim
94 words
An automatic magnet charger and calibration system as set forth in claim 10 wherein said means to automatically control and interrelate said first three mentioned means comprises said first mentioned mEans magnetizing said magnet to saturation, said control means utilizing said magnetic flux density measuring means to confirm that saturation has been attained, said control means activating said demagnetization means, said measuring means continuously indicating to said control means the amount of magnetic flux density in said magnet, said control means deactivating said demagnetization means when said predetermined stabilized magnetic flux density is obtained.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |