US5204628A
Expired / Lapsed
US
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Electron spin resonance system
Assignee: Proterial Ltd
•
Filing: 1992-07-07
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Granted: 1993-04-20
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Expires: 2012-07-07
Abstract
Abstract An electron spin resonance system comprising a magnetic circuit in which a pair of permanent magnets are respectively attached to opposing surfaces of a pair of stationary yokes arranged opposite to each other by way of a gap, a movable yoke is disposed to at least one of the pair of the stationary yokes for continuously changing the distance between opposing surfaces of the stationary yokes, so that the magnetic resistance of a magnetic path formed by the permanent magnets, stationary yokes and movable yokes is varied continuously thereby forming a continuously varying magnetic field in the gap between the opposed permanent magnets, and a modulating magnetic field application coil for applying a modulating magnetic field and/or a sweeping magnetic field application coil for applying a sweeping magnetic field to the gap, a cavity resonator disposed in the gap in which a specimen to be measured can be inserted, and a microwave generator and a microwave detector disposed to the cavity resonator.
Inventors
- 👤 Kenta Konishi
- 👤 Akio Nakanishi
- 👤 Nahoko Sugahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:58
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/60; G01R33/28; G01R33/38; G01R33/383
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
163 words
An electron spin resonance system, comprising: a magnetic circuit in which each permanent magnet, including a magnetic pole piece on the surface thereof, of a pair of permanent magnets is respectively attached to an opposing surface of a stationary yoke of a pair of stationary yokes mounted opposite to each other to form a gap, a movable yoke mounted for continuously changing the distance between opposing surfaces of the stationary yokes, so that the magnetic resistance of a magnetic path formed by said permanent magnets, stationary yokes and movable yokes is continuously modulated, thereby forming a continuously modulated magnetic field in the gap between the opposed permanent magnets; coils for applying a modulating magnetic field to said gap and a sweeping magnetic field application coil for applying a sweeping magnetic field to said gap; a cavity resonator disposed in said gap for receiving specimens to be measured; and a microwave generator and a microwave detector attached to the outside of said cavity resonator.
Claim 2
Dependent Claim
163 words
An electron spin resonance system, comprising: a magnetic circuit in which each permanent magnet, including a magnetic pole piece on the surface thereof, of a pair of permanent magnets is respectively attached to an opposing surface of a stationary yoke of a pair of stationary yokes mounted opposite to each other to form a gap, a movable yoke mounted for continuously changing the distance between opposing surfaces of the stationary yokes, so that the magnetic resistance of a magnetic path formed by said permanent magnets, stationary yokes and movable yokes is continuously modulated, thereby forming a continuously modulated magnetic field in the gap between the opposed permanent magnets; coils for applying a modulating magnetic field to said gap and a sweeping magnetic field application coil for applying a sweeping magnetic field to said gap; a cavity resonator disposed in said gap for receiving specimens to be measured; and a microwave generator and a microwave detector attached to the outside of said cavity resonator.
Claim 3
Dependent Claim
31 words
An electron spin resonance system as defined in claim 1, wherein the modulating magnetic field application coil are disposed around the periphery of the magnetic pole piece or the permanent magnet.
Claim 4
Dependent Claim
26 words
An electron spin resonance system as defined in claim 1, wherein the modulating magnetic field application coils are disposed around the periphery of the movable yoke.
Claim 5
Dependent Claim
31 words
An electron spin resonance system as defined in claim 1, wherein the sweeping magnetic field application coils are disposed around the periphery of the magnetic pole piece or the permanent magnet.
Claim 6
Dependent Claim
26 words
An electron spin resonance system as defined in claim 1, wherein the sweeping magnetic field application coils are disposed around the periphery of the movable yoke.
Claim 7
Dependent Claim
52 words
An electron spin resonance system as defined in claim 2, further comprising an AC power source means capable of supplying an AC current to the modulating magnetic field application coil and a display means for outputting the microwave detected signal upon application of the modulating magnetic field is outputted to an oscilloscope.
Claim 8
Dependent Claim
52 words
An electron spin resonance system as defined in claim 5, further comprising a DC power source means capable of supplying a DC current to the sweeping magnetic field application coil and a display means capable of outputting a microwave detected signal upon application of the sweeping magnetic field to the x-y recorder.
Claim 9
Dependent Claim
26 words
An electron spin resonance system as defined in claim 2, further comprising a lock-in amplifier for improving the sensitivity by stepping up the detected signal voltage.
Claim 10
Dependent Claim
26 words
An electron spin resonance system as defined in claim 1, wherein a microwave circuit comprises a microwave generator and a microwave detector integrated into a module.
Claim 11
Dependent Claim
23 words
An electron spin resonance system as defined in claim 9, wherein a microwave Doppler sensor using a Gunn diode is the microwave circuit.
Claim 12
Dependent Claim
22 words
An electron spin resonance system as defined in claim 1, wherein the cavity resonator is a TE 102 mode rectangular cavity resonator.
Claim 13
Dependent Claim
20 words
An electron spin resonance system as defined in claim 1, wherein the permanent magnet comprises an Fe-B-R series permanent magnet.
Claim 14
Dependent Claim
30 words
An electron spin resonance system as defined in claim 1, wherein the movable yoke comprises a bolt member forwarded and backwarded by a screw coupling passing through the stationary yoke.
Claim 15
Dependent Claim
22 words
An electron spin resonance system as defined in claim 13, wherein the bolt member comprises a plurality of bolt members disposed coaxially.
Claim 16
Dependent Claim
34 words
An electron spin resonance system as defined in claim 14, wherein the bolt member comprises a coarsely movable screwed bolt of a greater diameter and a fine movable screwed bolt of a smaller diameter.
Claim 17
Dependent Claim
36 words
An electron spin resonance system as defined in claim 1, wherein the movable yoke is disposed at one of the pair of yokes and the stationary yoke is disposed at another of the pair of yokes.
Claim 18
Dependent Claim
24 words
An electron spin resonance system as defined in claim 1, wherein the movable yoke is disposed at each one of the pair of yokes.
Claim 19
Dependent Claim
51 words
An electron spin resonance system as defined in claim 3, wherein an AC power source means capable of supplying an AC current to the modulating magnetic field application coil and a display means for outputting the microwave detected signal upon application of the modulating magnetic field is outputted to an oscilloscope.
Claim 20
Dependent Claim
53 words
An electron spin resonance system as defined in claim 4, wherein a DC power source means capable of supplying a DC current to the sweeping magnetic field application coil and a display means capable of outputting a microwave detected signal upon application of the sweeping magnetic field to the X-Y recorder are disposed.
Claim 21
Dependent Claim
164 words
An electron spin resonance system, comprising: a magnetic circuit in which each permanent magnet, including a magnetic pole piece on the surface thereof, of a pair of permanent magnets is respectively attached to an opposing surface of a stationary yoke of a pair of stationary yokes are mounted opposite to each other to form a gap, a movable yoke mounted for continuously changing the distance between opposing surfaces of the stationary yokes, so that the magnetic resistance of a magnetic path formed by said permanent magnets, stationary yokes and movable yokes is continuously modulated, thereby forming a continuously modulated magnetic field in the gap between the opposed permanent magnets; coils for applying a modulating magnetic field to said gap or a sweeping magnetic field application coil for applying a sweeping magnetic field to said gap; a cavity resonator disposed in said gap for receiving specimens to be measured; and a microwave generator and a microwave detector attached to the outside of said cavity resonator.
Claim 22
Dependent Claim
164 words
An electron spin resonance system, comprising: a magnetic circuit in which each permanent magnet, including a magnetic pole piece on the surface thereof, of a pair of permanent magnets is respectively attached to an opposing surface of a stationary yoke of a pair of stationary yokes are mounted opposite to each other to form a gap, a movable yoke mounted for continuously changing the distance between opposing surfaces of the stationary yokes, so that the magnetic resistance of a magnetic path formed by said permanent magnets, stationary yokes and movable yokes is continuously modulated, thereby forming a continuously modulated magnetic field in the gap between the opposed permanent magnets; coils for applying a modulating magnetic field to said gap or a sweeping magnetic field application coil for applying a sweeping magnetic field to said gap; a cavity resonator disposed in said gap for receiving specimens to be measured; and a microwave generator and a microwave detector attached to the outside of said cavity resonator.
Claim 23
Dependent Claim
31 words
An electron spin resonance system as defined in claim 20, wherein the modulating magnetic field application coil is disposed around the periphery of the magnetic pole piece or the permanent magnet.
Claim 24
Dependent Claim
26 words
An electron spin resonance system as defined in claim 20, wherein the modulating magnetic field application coil is disposed around the periphery of the movable yoke.
Claim 25
Dependent Claim
31 words
An electron spin resonance system as defined in claim 20, wherein the sweeping magnetic field application coils are disposed around the periphery of the magnetic pole piece or the permanent magnet.
Claim 26
Dependent Claim
26 words
An electron spin resonance system as defined in claim 20, wherein the sweeping magnetic field application coils are disposed around the periphery of the movable yoke.
Claim 27
Dependent Claim
53 words
An electron spin resonance system as defined in claim 21, wherein an AC power source means capable of supplying an AC current to the modulating magnetic field application coil is disposed and a display means for outputting the microwave detected signal upon application of the modulating magnetic field is outputted to an oscilloscope.
Claim 28
Dependent Claim
52 words
An electron spin resonance system as defined in claim 25, further comprising a DC power source means capable of supplying a DC current to the sweeping magnetic field application coil and a display means capable of outputting a microwave detected signal upon application of the sweeping magnetic field to the x-y recorder.
Claim 29
Dependent Claim
26 words
An electron spin resonance system as defined in claim 20, wherein a microwave circuit comprises a microwave generator and a microwave detector integrated into a module.
Claim 30
Dependent Claim
23 words
An electron spin resonance system as defined in claim 27, wherein a microwave Doppler sensor using a Gunn diode is the microwave circuit.
Claim 31
Dependent Claim
22 words
An electron spin resonance system as defined in claim 20, wherein the cavity resonator is a TE 102 mode rectangular cavity resonator.
Claim 32
Dependent Claim
20 words
An electron spin resonance system as defined in claim 20, wherein the permanent magnet comprises an Fe-B-R series permanent magnet.
Claim 33
Dependent Claim
30 words
An electron spin resonance system as defined in claim 20, wherein the movable yoke comprises a bolt member forwarded and backwarded by a screw coupling passing through the stationary yoke.
Claim 34
Dependent Claim
22 words
An electron spin resonance system as defined in claim 31, wherein the bolt member comprises a plurality of bolt members disposed coaxially.
Claim 35
Dependent Claim
34 words
An electron spin resonance system as defined in claim 32, wherein the bolt member comprises a coarsely movable screwed bolt of a greater diameter and a fine movable screwed bolt of a smaller diameter.
Claim 36
Dependent Claim
36 words
An electron spin resonance system as defined in claim 20, wherein the movable yoke is disposed at one of the pair of yokes and the stationary yoke is disposed at another of the pair of yokes.
Claim 37
Dependent Claim
24 words
An electron spin resonance system as defined in claim 20, wherein the movable yoke is disposed at each one of the pair of yokes.
Claim 38
Dependent Claim
51 words
An electron spin resonance system as defined in claim 22, wherein an AC power source means capable of supplying an AC current to the modulating magnetic field application coil and a display means for outputting the microwave detected signal upon application of the modulating magnetic field is outputted to an oscilloscope.
Claim 39
Dependent Claim
53 words
An electron spin resonance system as defined in claim 23, wherein a DC power source means capable of supplying a DC current to the sweeping magnetic field application coil and a display means capable of outputting a microwave detected signal upon application of the sweeping magnetic field to the X-Y recorder are disposed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |