Patent US3671874A successfully refreshed from Google Patents.
US3671874A
Expired / Lapsed
US
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Contactless rotary switching apparatus
Assignee: Denki Onkyo Co Ltd
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Filing: 1970-09-17
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Granted: 1972-06-20
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Expires: 1990-09-17
Abstract
Abstract A contactless rotary switching apparatus comprised of a discshaped fixed yoke which is stationary and a rotary yoke arranged in parallel with each other, a magnet positioned between the yokes, the magnet having one magnetic pole end fixed to one of the yokes while the other magnetic pole end is made free but arranged to lightly contact the other of the yokes, a number of balls made of magnetic material are arranged in succession in the form of a circle on the free end face of the magnet between the magnet and the yoke which lightly contacts the free end of the magnet, a plurality of magneto-electric converting devices are arranged radially towards the circumference at the peripheral portion of the fixed yoke, and at least one arm provided at the peripheral portion of the rotary yoke so that the arm or arms are extended towards the said fixed yoke so that an end or ends of the arms will be moved towards and away from the magneto-electric converting devices during rotation of the rotary yoke.
Inventors
- 👤 Tunekazu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:17
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
217 words
A contactless rotary switching apparatus comprised of a. a disc-shaped fixed yoke made of magnetic material; b. at least one rotary yoke made of magnetic material, and arranged opposite to and parallel with said fixed yoke; c. an actuating means which is capable of causing each said rotary yoke to rotate in parallel with the said fixeD yoke; d. a magnet arranged between the said fixed yoke and said rotary yokes, one magnetic pole end of which is fixed to one of said yokes, and the other magnetic pole end of which is arranged opposite to the other of said yokes as a free end; e. a plurality of magneto-electric converting devices radially arranged at the peripheral portion of said fixed yoke; f. an external load and power source electrically connected to each of said magneto-electric converting devices; g. at least one arm made of magnetic material extended from each said rotary yoke towards said fixed yoke, the end of which arm can closely approach a magneto-electric converting device; h. circular grooves provided in the free end of said magnet and in the end face of the yoke which comes in contact with said free end; and i. a plurality of balls housed in said grooves coupling the free end of said magnet and the mating yoke.
Claim 2
Dependent Claim
217 words
A contactless rotary switching apparatus comprised of a. a disc-shaped fixed yoke made of magnetic material; b. at least one rotary yoke made of magnetic material, and arranged opposite to and parallel with said fixed yoke; c. an actuating means which is capable of causing each said rotary yoke to rotate in parallel with the said fixeD yoke; d. a magnet arranged between the said fixed yoke and said rotary yokes, one magnetic pole end of which is fixed to one of said yokes, and the other magnetic pole end of which is arranged opposite to the other of said yokes as a free end; e. a plurality of magneto-electric converting devices radially arranged at the peripheral portion of said fixed yoke; f. an external load and power source electrically connected to each of said magneto-electric converting devices; g. at least one arm made of magnetic material extended from each said rotary yoke towards said fixed yoke, the end of which arm can closely approach a magneto-electric converting device; h. circular grooves provided in the free end of said magnet and in the end face of the yoke which comes in contact with said free end; and i. a plurality of balls housed in said grooves coupling the free end of said magnet and the mating yoke.
Claim 3
Dependent Claim
29 words
A contactless rotary switching apparatus, according to claim 1, wherein projections are radially arranged at the periphery of the fixed yoke and said magneto-electric converting devices are attached thereto.
Claim 4
Dependent Claim
26 words
A contactless rotary switching apparatus, according to claim 1, wherein said magnet is provided with a reinforcing part made of magnetic material with high mechanical strength.
Claim 5
Dependent Claim
72 words
A contactless rotary switching apparatus, according to claim 1, wherein a plurality of rotary yokes are provided said rotary yokes having a plurality of arms extending therefore at different distances from the center of rotation of said rotary yokes, whereby said arms rotate along concentric circles with different diameters from the center of rotation, and wherein the fixed yoke is provided with magneto-electric converting devices correspondingly arranged in a plurality of rows.
Claim 6
Dependent Claim
43 words
A contactless rotary switching apparatus, according to claim 1, wherein the fixed yoke is provided with magneto-electric converting devices which are arranged in a plurality of rows, and one arm of each said rotary yoke closely approaches a plurality of magneto-electric converting devices.
Claim 7
Dependent Claim
126 words
A contactless rotary switching apparatus, according to claim 1, wherein strip-shaped plate yokes are radially attached to the fixed yoke so that their outward ends project from the fixed yoke, said plate yokes are mounted on the fixed yoke at one position so that the projected outward ends of said plate yokes rotate, the magneto-electric converting devices are radially arranged at the periphery of said fixed yoke, the projected outward ends of said plate yokes are respectively provided with magneto-electric converting devices, an actuating means is provided so that said plate yokes can be selectively rotated, and a plurality of arms are provided at said rotary yokes so that one of the said arms selectively approaches closely to the magneto-electric converting devices on the plate yokes.
Claim 8
Dependent Claim
53 words
A contactless rotary switching apparatus, according to claim 1, wherein a plurality of rotary yokes are provided with circular grooves in their mating surfaces where balls made of magnetic material are housed to rotatably couple said rotary yokes, and the actuating means is capable of either selectively or simultaneously rotating said rotary yokes.
Claim 9
Dependent Claim
48 words
A contactless rotary switching apparatus, according to claim 7, wherein a plurality of rotary yokes are respectively provided with arms of different lengths from the center of rotation and the fixed yoke is provided with the magneto-electric converting devices opposite in a plurality of rows to said arms.
Claim 10
Dependent Claim
64 words
A contactless rotary switching apparatus, according to claim 7, wherein a plurality of rotary yokes are controlled so that the rotation angles are different, the fixed yoke is provided with at least one magneto-electric converting device in the range of the rotation angle of each rotary yoke and the actuating means is provided at the said rotary yokes to selectively rotate the rotary yokes.
Claim 11
Dependent Claim
29 words
A contactless rotary switching apparatus, accoRding to claim 7, wherein at least one of the rotary yokes is coupled to the rotary shaft through a speed reduction transmitting means.
Claim 12
Dependent Claim
29 words
A contactless rotary switching apparatus, according to claim 1, wherein at least one arm at least one rotary yoke is beveled in the direction of rotation at its ends.
References Cited (Backward Citations)
US3162804A
Cited
US3366908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |