US3889220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked magnetic arrangement
Assignee: Individual
•
Filing: 1973-06-26
•
Granted: 1975-06-10
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Expires: 1993-06-26
Abstract
Abstract A magnetic arrangement includes a stack of members including at least two permanent magnet members and at least one intermediate member of soft magnentic material having a permeability higher than that of said permanent magnet members and sandwiched between said permanent magent members.
Inventors
- 👤 Heinrich Spodig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
123 words
A magnet arrangement comprising, in combination, a stack of parts including at least two permanent magnet parts having respective first end faces of the same magnetic polarity and respective second end faces of the same magnetic polarity, said first end faces having a magnetic polarity opposite to the magnetic polarity of said second end faces, and an intermediate part made of a magnetic material having a magnetic permeability higher than the permeability of said permanent magnet parts and sandwiched between said permanent magnet parts and having a first end face juxtaposed with the first end face of one of said permanent magnet parts and an opposite second end face juxtaposed with the second end face of the other of said permanent magnet parts.
Claim 2
Dependent Claim
123 words
A magnet arrangement comprising, in combination, a stack of parts including at least two permanent magnet parts having respective first end faces of the same magnetic polarity and respective second end faces of the same magnetic polarity, said first end faces having a magnetic polarity opposite to the magnetic polarity of said second end faces, and an intermediate part made of a magnetic material having a magnetic permeability higher than the permeability of said permanent magnet parts and sandwiched between said permanent magnet parts and having a first end face juxtaposed with the first end face of one of said permanent magnet parts and an opposite second end face juxtaposed with the second end face of the other of said permanent magnet parts.
Claim 3
Dependent Claim
118 words
A magnet arrangement as defined in claim 1, wherein said stack is an elongated stack comprised of permanent magnet parts alternating with intermediate parts having a permeability higher than the permeability of the permanent magnet parts, and wherein one end of said stack is a north-pole end and the other end of said stack is a south-pole end, and wherein each of said permanent magnet parts has a north-pole end facing towards said north-pole end of said stack and facing away from said south-pole end of said stack, and wherein each of said permanent magnet parts has a south-pole end facing towards said south-pole end of said stack and facing away from said north-pole end of said stack.
Claim 4
Dependent Claim
17 words
A magnet arrangement as defined in claim 1, wherein each of said parts is a single member.
Claim 5
Dependent Claim
17 words
A magnet arrangement as defined in claim 2, wherein each of said parts is a single member.
Claim 6
Dependent Claim
19 words
A magnet arrangement as defined in claim 2, wherein the end parts of said stack are permanent magnet parts.
Claim 7
Dependent Claim
22 words
A magnet arrangement as defined in claim 2, wherein one of the end parts of said stack is a peRmanent magnet parts.
Claim 8
Dependent Claim
32 words
A magnet arrangement as defined in claim 2, wherein the end parts of said stack are parts of magnetic material having a permeability higher than the permeability of said permanent magnet parts.
Claim 9
Dependent Claim
15 words
A magnet arrangement as defined in claim 1, wherein said permanent magnet parts are non-metallic.
Claim 10
Dependent Claim
15 words
A magnet arrangement as defined in claim 2, wherein said permanent magnet parts are non-metallic.
Claim 11
Dependent Claim
25 words
A magnet arrangement as defined in claim 1, wherein said permanent magnet parts are non-metallic and wherein said at least one intermediate part is metallic.
Claim 12
Dependent Claim
22 words
A magnet arrangement as defined in claim 2, wherein said permanent magnet parts are non-metallic and wherein said intermediate members are metallic.
Claim 13
Dependent Claim
16 words
A magnet arrangement as defined in claim 1, wherein said intermediate part is made of iron.
Claim 14
Dependent Claim
16 words
A magnet arrangement as defined in claim 2, wherein said intermediate parts are made of iron.
Claim 15
Dependent Claim
25 words
A magnet arrangement as defined in claim 1, wherein said permanent magnet parts are non-metallic and wherein said intermediate part is metallic and includes iron.
Claim 16
Dependent Claim
25 words
A magnet arrangement as defined in claim 2, wherein said permanent magnet parts are non-metallic and wherein said intermediate parts are metallic and include iron.
Claim 17
Dependent Claim
15 words
A magnet arrangement as defined in claim 1, wherein said parts are all plate-shaped parts.
Claim 18
Dependent Claim
27 words
A magnet arrangement as defined in claim 1, wherein said intermediate part is at most as thick in direction of flux travel as said permanent magnet parts.
Claim 19
Dependent Claim
26 words
A magnet arrangement as defined in claim 2, wherein said intermediate parts are each no thicker in direction of flux travel than said permanent magnet parts.
Claim 20
Dependent Claim
17 words
A magnet arrangement as defined in claim 1, wherein all said parts are of congruent cross-sectional outline.
Claim 21
Dependent Claim
17 words
A magnet arrangement as defined in claim 2, wherein all said parts are of congruent cross-sectional outline.
Claim 22
Dependent Claim
30 words
A magnet arrangement as defined in claim 1, wherein said intermediate part has a cross-section in direction transverse to flux travel different from the cross-sections of said permanent magnet parts.
Claim 23
Dependent Claim
34 words
A magnet arrangement as defined in claim 2, wherein at least one of said intermediate parts has a cross-section in direction transverse to flux orientation different from the cross-sections of said permanent magnet members.
Claim 24
Dependent Claim
18 words
A magnet arrangement as defined in claim 1, wherein said parts of said stack have aligned mounting bores.
Claim 25
Dependent Claim
18 words
A magnet arrangement as defined in claim 2, wherein said parts of said stack have aligned mounting bores.
Claim 26
Dependent Claim
43 words
A magnet arrangement as defined in claim 1; and further including an additional stack of parts including at least two permanent magnet members, and wherein said intermediate parts extends intermediate and is sandwiched between said two permanent magnet parts of said additional stack.
Claim 27
Dependent Claim
47 words
A magnet arrangement as defined in claim 2; and further including an additional stack of permanent magnet parts alternating with intermediate parts having a permeability higher than that of the permanent magnet parts, and wherein at least some of said intermediate parts are common to both stacks.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |