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US4378258A
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Conversion between magnetic energy and mechanical energy
Assignee: United States Department of the Navy
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Filing: 1981-04-02
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Granted: 1983-03-29
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Expires: 2001-04-02
Abstract
Abstract A method of converting magnetic energy to mechanical energy comprising subjecting a material of the formula RxT1-x wherein R is a rare earth or mixtures thereof, T is Fe, Ni, Co, Mn, or mixtures thereof, and 0<x<1, to a change in magnetic field and of converting mechanical energy to magnetic energy comprising subjecting a material of the formula RxT1-x to a change in pressure.
Inventors
- 👤 Arthur E. Clark
- 👤 Henry S. Belson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:03
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0306; C; C22; C22C; C22C28/00; H10; H10N; H10N35/00; H10N35/80; H10N35/85
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
58 words
A method of converting magnetic energy into mechanical energy wherein said mechanical energy is in the form of a change of dimension in material comprising subjecting a material of the formula R x Fe 1-x wherein R is a rare earth selected from the group consisting of Sm and Tb, and 0<x<1, to a change in magnetic field.
Claim 2
Independent Claim
58 words
A method of converting magnetic energy into mechanical energy wherein said mechanical energy is in the form of a change of dimension in material comprising subjecting a material of the formula R x Fe 1-x wherein R is a rare earth selected from the group consisting of Sm and Tb, and 0<x<1, to a change in magnetic field.
Claim 3
Dependent Claim
7 words
The method of claim 1 wherein 0.1≦x≦0.5.
Claim 4
Dependent Claim
7 words
The method of claim 2 wherein X=1/3.
Claim 5
Dependent Claim
12 words
The method of claim 1, 2, or 3 wherein R is Tb.
Claim 6
Dependent Claim
12 words
The method of claim 1, 2, or 3 wherein R is Sm.
Claim 7
Independent Claim
42 words
A method of converting mechanical energy to magnetic energy comprising subjecting a material of the formula R x Fe 1-x wherein R is a rare earth selected from the group consisting of Sm and Tb and 0<x<1, to a change in pressure.
Claim 8
Independent Claim
42 words
A method of converting mechanical energy to magnetic energy comprising subjecting a material of the formula R x Fe 1-x wherein R is a rare earth selected from the group consisting of Sm and Tb and 0<x<1, to a change in pressure.
Claim 9
Dependent Claim
7 words
The method of claim 6 wherein 0.1≦x≦0.5.
Claim 10
Dependent Claim
7 words
The method of claim 7 wherein X=1/3.
Claim 11
Dependent Claim
12 words
The method of claim 6, 7, or 8 wherein R is Tb.
Claim 12
Dependent Claim
12 words
The method of claim 6, 7, or 8 wherein R is Sm.
Claim 13
Independent Claim
59 words
A method of converting magnetic energy into mechanical energy wherein said mechanical is in the form of a change of dimension in material comprising subjecting a material selected from the group consisting of (a) TbFe 2-y Co y , (b) TbFe 2-y Ni y , and (c) TbFe 2-y Mn y wherein 0<y≦0.4 to a change in magnetic field.
Claim 14
Independent Claim
59 words
A method of converting magnetic energy into mechanical energy wherein said mechanical is in the form of a change of dimension in material comprising subjecting a material selected from the group consisting of (a) TbFe 2-y Co y , (b) TbFe 2-y Ni y , and (c) TbFe 2-y Mn y wherein 0<y≦0.4 to a change in magnetic field.
Claim 15
Dependent Claim
15 words
The method of claim 11 wherein the material is TbFe 2-y Co y and 0<y≦0.4.
Claim 16
Dependent Claim
15 words
The method of claim 11 wherein the material is TbFe 2-y Ni y and 0<y≦0.4.
Claim 17
Dependent Claim
15 words
The method of claim 11 wherein the material is TbFe 2-y Mn y and 0<y≦0.4.
Claim 18
Independent Claim
44 words
A method of converting mechanical energy into magnetic energy comprising subjecting a material selected from the group consisting of (a) TbFe 2-y Co y , (b) TbFe 2-y Ni y , and (c) TbFe 2-y Mn y wherein 0<y≦0.4 to a change in pressure.
Claim 19
Independent Claim
44 words
A method of converting mechanical energy into magnetic energy comprising subjecting a material selected from the group consisting of (a) TbFe 2-y Co y , (b) TbFe 2-y Ni y , and (c) TbFe 2-y Mn y wherein 0<y≦0.4 to a change in pressure.
Claim 20
Dependent Claim
15 words
The method of claim 15 wherein the material is TbFe 2-y Co y and 0<y≦0.4.
Claim 21
Dependent Claim
15 words
The method of claim 15 wherein the material is TbFe 2-y Ni y and 0<y≦0.4.
Claim 22
Dependent Claim
15 words
The method of claim 15 wherein the material is TbFe 2-y Mn y and 0<y≦0.4.
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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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |