US3780313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generator
Assignee: Individual
•
Filing: 1972-06-23
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Granted: 1973-12-18
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Expires: 1992-06-23
Abstract
Abstract A pulse generator to provide a series of pulses through the switching of a magnetic domain in a two domain wire. The generator includes a read-out head having magnets and an inductive pick-up. As the wire from a rotor is moved past the read head, a first magnetic field in the read head switches a first domain in the wire. When the wire is next to the inductive pick-up, the net magnetic field on the wire is minimum and the magnetic bias on the first domain due to the magnetization of the second domain causes a switching of the second domain and the induction of a pulse in the pick-up coil. A second magnetic field is in opposition to the first magnetic field. The two magnetic fields are so positioned that they substantially cancel each other out at the area in front of the pick-up thereby determining the location where the second domain switches.
Inventors
- 👤 J Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:33
CPC Classifications
H; H02; H02N; H02N11/00; H02N11/002; H02N11/004
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
224 words
A pulse generator emoloying a wire having a first magnetic domain and a second magnetic domain, at least said first domain being capable of retaining net magnetization after being subjected to a magnetic field, said domains being separated by a domain wall when said first domain has a net magnetization in a first direction and said second domain has a net magnetization in a second direction substantially opposite from said first direction, comprising: a support on which the wire is mounted, a read-out device, and motive means for moving said support and said read-out device relative to each other to bring the wire into close proximity to said read-out device, said read-out device including a magnetic means to establish a first magnetic field strong enough to cause the direction of magnetization of both of said domains to be in a first direction when said motive means causes a first predetermined position to be attained between the wire and said first magnet, said read-out device including a pick-up spaced from said first predetermined position such that, when said motive means causes the wire and said pick-up to be in close proximity after said first predetermined position, the strength of said first magnetic field is low enough that the direction of magnetization in said second domain is reversed due to the bias of said first domain.
Claim 2
Dependent Claim
224 words
A pulse generator emoloying a wire having a first magnetic domain and a second magnetic domain, at least said first domain being capable of retaining net magnetization after being subjected to a magnetic field, said domains being separated by a domain wall when said first domain has a net magnetization in a first direction and said second domain has a net magnetization in a second direction substantially opposite from said first direction, comprising: a support on which the wire is mounted, a read-out device, and motive means for moving said support and said read-out device relative to each other to bring the wire into close proximity to said read-out device, said read-out device including a magnetic means to establish a first magnetic field strong enough to cause the direction of magnetization of both of said domains to be in a first direction when said motive means causes a first predetermined position to be attained between the wire and said first magnet, said read-out device including a pick-up spaced from said first predetermined position such that, when said motive means causes the wire and said pick-up to be in close proximity after said first predetermined position, the strength of said first magnetic field is low enough that the direction of magnetization in said second domain is reversed due to the bias of said first domain.
Claim 3
Dependent Claim
120 words
The pulse generator of claim 1 further comprising: a second magnetic field established by said magnetic means, said second magnetic field being strong enough to cause the direction of magnetization of both of said domains to be in a second direction when said motive means causes a second predetermined position to be attained between the wire and said second magnet, said second predetermined position being spaced from said pick-up such that, when said motive means causes the wire and said pick-up to be in close proximity after said second predetermined position, the strength of said second magnetic field is low enough that the direction of magnetization in said second domain is reversed due to the bias of said first domain.
Claim 4
Dependent Claim
38 words
The pulse generator of claim 1 further comprising: a first setting magnet spaced from said read-out device to set the direction of magnetization of the first domain in said first direction prior to attaining said first predetermined position.
Claim 5
Dependent Claim
69 words
The pulse generator of claim 2 further comprising: a first setting magnet spaced from said read-out device to set the direction of magnetization of the first domain in said first direction prior to attaining said first predetermined position, and a second setting magnet spaced from said read-out device to set the direction of magnetization of the first domain in said second direction prior to attaining said second predetermined position.
Claim 6
Dependent Claim
17 words
The pulse generator of claim 2 wherein said first and second directions are opposite to one another.
Claim 7
Dependent Claim
17 words
The pulse generator of claim 4 wherein said first and second directions are opposite to one another.
Claim 8
Dependent Claim
46 words
The pulse generator of claim 2 wherein said first and second magnetic fields substantially cancel each other out at a third predetermined position in close proximity to said pick-up to provide a predetermined location for the reversal of the direction of magnetization in the second domain.
Claim 9
Dependent Claim
17 words
The pulse generator of claim 7 wherein said first and second directions are opposite to one another.
Claim 10
Dependent Claim
27 words
The pulse generator of claim 1 wherein: said first magnetic field has a strength great enough to set the direction of magnetization of both of said domains.
Claim 11
Dependent Claim
29 words
The pulse generator of claim 2 wherein: said first and second magnetic fields have a strength great enough to set the direction of magnetization of both of said domains.
Claim 12
Dependent Claim
17 words
The pulse generator of claim 10 wherein said first and second directions are opposite to one another.
Claim 13
Dependent Claim
26 words
The pulse generator of claim 3 wherein: the strength of said first magnetic field is sufficient to set the direction of magnetization of the first domain.
Claim 14
Dependent Claim
29 words
The pulse generator of claim 4 wherein: the strength of said first and second magnetic fields are insufficient to set the direction of the magnetization of the first domain.
Claim 15
Dependent Claim
17 words
The pulse generator of claim 13 wherein said first and second directions are opposite to one another.
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |