Patent US1337489A successfully refreshed from Google Patents.
Patent US3969644A successfully refreshed from Google Patents.
US3969644A
Expired / Lapsed
US
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Pulse generator with asymmetrical multi-pole magnet
Assignee: Veeder Industries Inc
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Filing: 1975-02-03
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Granted: 1976-07-13
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Expires: 1995-02-03
Abstract
Abstract A pulse generator is comprised of an asymmetrical magnet assembly and a Hall sensor operative for generating an electrical signal upon the application of a magnetic field thereto. The Hall sensor and magnet assembly are mounted for relative movement for the generation of a train of electrical signals in response to relative displacement therebetween. The asymmetrical multi-pole magnets in the magnet assembly have a plurality of symmetrically spaced pole pairs with each pole pair including a magnetic pole of predominant polarity occupying a substantially greater area than the pole of opposite polarity. The predominant pole is sufficiently strong to provide a salient magnetic field of essentially single polarity. a magnetizing head also is provided for producing the asymmetrical pole character of the magnet.
Inventors
- 👤 Walter J. Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:39
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487; H01; H01F; H01F13/00; H01F13/003; H02; H02K; H02K99/00; H02K99/10; H03K3/59; H10; H10N; H10N52/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
An asymmetrical magnet well suited for use in a rotary pulse generator comprising a multi-pole magnetic disc wherein the magnetic poles of the disc consist essentially of a plurality of pole pairs symmetrically spaced about the circumference of the disc with each pole pair including a predominant magnetic pole of one polarity and a subservient magnetic pole of the opposite polarity, the magnetic poles being oriented parallel to the axis of the disc.
Claim 2
Dependent Claim
73 words
An asymmetrical magnet well suited for use in a rotary pulse generator comprising a multi-pole magnetic disc wherein the magnetic poles of the disc consist essentially of a plurality of pole pairs symmetrically spaced about the circumference of the disc with each pole pair including a predominant magnetic pole of one polarity and a subservient magnetic pole of the opposite polarity, the magnetic poles being oriented parallel to the axis of the disc.
Claim 3
Dependent Claim
14 words
The magnet of claim 1 wherein the disc is formed from barium ferrite material.
Claim 4
Dependent Claim
23 words
The magnet of claim 1 wherein the magnetic disc is provided with ten pole pairs located in a radial pattern on 36° centers.
Claim 5
Dependent Claim
32 words
The magnet of claim 1 wherein the predominant magnetic pole occupies a segment twice as large as the pole of opposite polarity and the magnet's salient magnetic field is of single polarity.
Claim 6
Dependent Claim
74 words
A multi-pole magnet comprising a planar member having magnetic poles consisting essentially of a plurality of symmetrically spaced pole pairs, each pole pair including a predominant magnetic pole of one polarity and a subservient magnetic pole of the opposite polarity to thereby provide an asymmetrical relationship between the poles of opposite polarity and a salient magnetic field having an effective single polarity, the magnetic poles being oriented perpendicular to the plane of the magnet.
Claim 7
Dependent Claim
74 words
A multi-pole magnet comprising a planar member having magnetic poles consisting essentially of a plurality of symmetrically spaced pole pairs, each pole pair including a predominant magnetic pole of one polarity and a subservient magnetic pole of the opposite polarity to thereby provide an asymmetrical relationship between the poles of opposite polarity and a salient magnetic field having an effective single polarity, the magnetic poles being oriented perpendicular to the plane of the magnet.
Claim 8
Dependent Claim
29 words
The multi-pole magnet of claim 5 wherein the magnet is a flat planar member and the pole faces of each pole pair are located on the planar surfaces thereof.
Claim 9
Dependent Claim
15 words
The multi-pole magnet of claim 5 wherein the magnet is formed from barium ferrite material.
Claim 10
Dependent Claim
23 words
The multi-pole magnet of claim 5 wherein the predominant magnetic pole occupies a segment twice as large as the pole of opposite polarity.
References Cited (Backward Citations)
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US3355645A
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US3304449A
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US3335377A
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US3678311A
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US3855490A
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |