US3750151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase rotating ring display
Assignee: Individual
•
Filing: 1971-08-25
•
Granted: 1973-07-31
•
Expires: 1991-08-25
Abstract
Abstract A data display device which includes an indicia-bearing rotor driven by three multiple stators. In one embodiment the three stators extend collectively around the rotor. In another embodiment, each stator extends fully around the rotor. The rotor carries a plurality of equally spaced-apart magnetic domains upon which the three stators act in succession. One of the magnetic domains is purposely omitted, however, to permit magnetic detection of a predetermined position of the rotor.
Inventors
- 👤 H Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/20; G04B19/202
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
83 words
A display device comprising in combination a. an indicia-carrying ring rotor having a plurality of magnetic domains; b. three multi-pole electrically wound stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being successively aligned with domains of said rotor at successive positions of said rotor; c. means for magnetizing said stators; and d. means for modulating the magnetization of said stators through three cyclically recurring phases.
Claim 2
Dependent Claim
83 words
A display device comprising in combination a. an indicia-carrying ring rotor having a plurality of magnetic domains; b. three multi-pole electrically wound stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being successively aligned with domains of said rotor at successive positions of said rotor; c. means for magnetizing said stators; and d. means for modulating the magnetization of said stators through three cyclically recurring phases.
Claim 3
Dependent Claim
59 words
The display device of claim 1 characterized further in that each said stator contains a plurality of arcuately distributed gaps through which said rotor domains pass as said rotor turns and is magnetically coupled to a permanent magnet so as to normally establish a magnetic field across said gaps and to an electric winding for modulating said magnetic field.
Claim 4
Dependent Claim
41 words
means including a permanent magnet and a magnetic means for providing a flux path between said magnet and said magnetic members for simultaneously imposing a magnetic field by means of said magnet across all of the gaps of said stator; and
Claim 5
Dependent Claim
41 words
means including a permanent magnet and a magnetic means for providing a flux path between said magnet and said magnetic members for simultaneously imposing a magnetic field by means of said magnet across all of the gaps of said stator; and
Claim 6
Dependent Claim
20 words
means for simultaneously modulating the magnetic field imposed across all of the gaps of said stator by said permanent magnet.
Claim 7
Dependent Claim
20 words
means for simultaneously modulating the magnetic field imposed across all of the gaps of said stator by said permanent magnet.
Claim 8
Dependent Claim
23 words
The display device of claim 2 characterized further in that each said stator extends along approximately one-third of the periphery of said rotor.
Claim 9
Dependent Claim
45 words
The display device of claim 2 characterized further in that said rotor is comprised of three concentric ring portions, each carrying an individual set of magnetic domains and respective ones of said stators extend around the full periphery of respective ones of said ring portions.
Claim 10
Dependent Claim
62 words
The display device of claim 4 characterized further in that each said stator includes first and second sets of pole pieces distributed in a circular array, said sets being spaced apart so as to receive said rotor between them, each pole piece in the first set of a stator being opposite a corresponding pole piece in the second set of that stator.
Claim 11
Dependent Claim
52 words
The display device of claim 5 characterized further in that the first set of pole pieces of all three of said stators are formed from a single ring of magnetic material having a plurality of three-stepped spokes extending generally radially between inner and outer rim portions of said ring of magnetic material.
Claim 12
Dependent Claim
50 words
The display device of claim 3 characteRized further in that each said stator includes a pair of arcuate magnetic members with mutually opposite sets of pole teeth pole teeth of each said member being spaced apart by the same distance as the spacing between adjacent ones of said magnetic domains.
Claim 13
Dependent Claim
50 words
The display device of claim 1 characterized further in that said domains are spaced apart equally around the periphery of said rotor, one of said domains being different from the other domains sufficiently to be magnetically identifiable therefrom, to permit a predetermined location of said rotor to be detected magnetically.
Claim 14
Dependent Claim
27 words
The display device of claim 8 characterized further in that it includes additionally a magnetic pick-off adjacent said rotor for detecting the presence of said different domain.
Claim 15
Dependent Claim
24 words
The display device of claim 8 characterized further in that said different domain differs from the remaining domains in that it is substantially non-magnetic.
Claim 16
Dependent Claim
55 words
The display device of claim 1 characterized further in that said domains are uniformly spaced around the periphery of said ring, except that one domain is omitted and characterized further in that a magnetic pick-off next to said rotor is provided for detecting a predetermined position of said rotor by the absence of said domain.
Claim 17
Dependent Claim
64 words
The display device of claim 1, characterized further in that each said stator is configured to define a plurality of arcuately distributed gaps and in that said means for magnetizing said stators includes for each stator a permanent magnet and a magnetic member coupled between said magnet and said stator to apply the magnetic field of said magnet across all gaps of said stator.
Claim 18
Dependent Claim
22 words
The display device of claim 12 characterized further in that said means for modulating includes a coil wound around said magnetic member.
Claim 19
Dependent Claim
36 words
The display device of claim 1, characterized further in that said rotor is comprised of a ring of uniformly magnetic material whose cross-section deviates at intervals along its circumference in order to create said magnetic domains.
Claim 20
Dependent Claim
27 words
The display device of claim 1 characterized further in that said rotor is comprised of a ring of uniformly magnetic material corrugated to create said magnetic domains.
Claim 21
Dependent Claim
87 words
A display device comprising in combination a. an indicia-carrying ring rotor having a plurality of magnetic domains; b. a plurality of multi-pole stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being non-concurrently aligned with the domains of said rotor, each said stator extending fully around the periphery of said rotor; c. means for steadily magnetizing said stators; and d. means for individually modulating the magnetization of each said stator.
Claim 22
Dependent Claim
87 words
A display device comprising in combination a. an indicia-carrying ring rotor having a plurality of magnetic domains; b. a plurality of multi-pole stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being non-concurrently aligned with the domains of said rotor, each said stator extending fully around the periphery of said rotor; c. means for steadily magnetizing said stators; and d. means for individually modulating the magnetization of each said stator.
Claim 23
Dependent Claim
26 words
The display device of claim 16 characterized further in that said stators comprise a toroidal ring of magnetic material in which said ring is rotatably disposed.
Claim 24
Dependent Claim
77 words
A display device comprising in combination a. a rotor having a plurality of magnetic domains; b. three multi-pole stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being aligned with domains of said rotor at every third successive position of said rotor; c. means for steadily magnetizing said stators; and d. means for individually modulating the magnetization of said stators.
Claim 25
Dependent Claim
77 words
A display device comprising in combination a. a rotor having a plurality of magnetic domains; b. three multi-pole stators magnetically coupled to said domains, poles of a given stator being concurrently aligned with a corresponding plurality of said domains, poles of the respective stators being aligned with domains of said rotor at every third successive position of said rotor; c. means for steadily magnetizing said stators; and d. means for individually modulating the magnetization of said stators.
Claim 26
Dependent Claim
47 words
The display device of claim 18 characterized further in that said means for steadily magnetizing said stators includes a permanent magnet for each of said stators and in that said means for modulating the magnetization of said stators includes for each said stator a coil wound thereon.
Claim 27
Dependent Claim
30 words
A display device comprising in combination a. an indicia-carrying ring rotor carrying a plurality of magnetic domains; b. three stators extending along the periphery of said ring, each staTor including
Claim 28
Dependent Claim
30 words
A display device comprising in combination a. an indicia-carrying ring rotor carrying a plurality of magnetic domains; b. three stators extending along the periphery of said ring, each staTor including
Claim 29
Dependent Claim
72 words
The display device of claim 20 characterized further in that said domains are uniformly distributed along said rotor and in that for each stator its gaps are so spaced that they all become simultaneously aligned with a corresponding number of said magnetic domains, said stators being so spaced relative to each other that the domains of said rotor reach alignment with the gaps of the respective stators in a cyclically recurring succession.
Claim 30
Dependent Claim
27 words
The display device of claim 20 characterized further in that said means for simultaneously modulating includes an electric coil wound around a portion of said magnetic means.
References Cited (Backward Citations)
US2837670A
Cited
US3121851A
Cited
US3391289A
Cited
US3344325A
Cited
US3509390A
Cited
US3576975A
Cited
US3623083A
Cited
US3626269A
Cited
US3649450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |