Patent US3900814A successfully refreshed from Google Patents.
US3900814A
Expired / Lapsed
US
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Revolution sensing apparatus
Assignee: Denki Onkyo Co Ltd
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Filing: 1973-05-31
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Granted: 1975-08-19
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Expires: 1993-05-31
Abstract
Abstract A revolution sensing apparatus in which a magnetic circuit is formed by a fixed yoke and a moving yoke which are opposed with a gap. A magnets resistance effect device is provided on a flat surface of the fixed yoke which faces the gap, and said moving yoke is adapted to be moved by an external revolution torque along said flat surface. Projected segments facing said flat surface are provided on said moving yoke in the direction of movement of said moving yoke and the magnetic flux is concentrated by each of said projected segments and is applied to said device as said moving yoke moves.
Inventors
- 👤 Noboru Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:11
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/142; G01D5/147; G01F; G01F15/00; G01F15/06; G01F15/068; G01H; G01H1/00; G01H1/10; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488; G01P3/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
295 words
A revolution sensing apparatus for sensing the rotation of a machine said apparatus comprising a. a fixed yoke made of a magnetic material and having a flat part, b. a moving yoke made of a magnetic material having an extreme end opposed to said flat part with a gap therebetween said moving yoke being adapted to be moved by the revolution torque of said machine in a direction along said flat part, said moving yoke having a plurality of projected segments facing said flat part of the fixed yoke the projected segments being arranged in a direction of movement of said moving yoke, c. a magnetism generating means operatively connected to at least one of said yokes, and d. at least one magneto-resistance effect device having two ends and having at least one magnetism sensing part positioned in said gap opposed to said projected segment said magnetoresistance effect device comprising a magnetism sensing semiconductor plate and at least one shorting segment made of a conductive material and arranged across said semiconductor plate in a direction intersecting the direction of movement of said moving yoke, whereby said magneto-resistance effect device includes a plurality of magnetism sensing parts which are formed with intervals therebetween said shorting segment being positioned within said intervals in the direction of movement of the moving yoke and wherein said magnetism sensing parts are adapted to simultaneously oppose said projected segments, wherein said both yokes are arranged so that a magnetic circuit is formed by said magnetism generating means and the magnetic flux crossing said gap at a right angle to the direction of movement of said moving yoke, and wherein the magnetic flux concentrated by said projected segment is applied to said magnetism sensing parts in sequence as said moving yoke moves.
Claim 2
Dependent Claim
295 words
A revolution sensing apparatus for sensing the rotation of a machine said apparatus comprising a. a fixed yoke made of a magnetic material and having a flat part, b. a moving yoke made of a magnetic material having an extreme end opposed to said flat part with a gap therebetween said moving yoke being adapted to be moved by the revolution torque of said machine in a direction along said flat part, said moving yoke having a plurality of projected segments facing said flat part of the fixed yoke the projected segments being arranged in a direction of movement of said moving yoke, c. a magnetism generating means operatively connected to at least one of said yokes, and d. at least one magneto-resistance effect device having two ends and having at least one magnetism sensing part positioned in said gap opposed to said projected segment said magnetoresistance effect device comprising a magnetism sensing semiconductor plate and at least one shorting segment made of a conductive material and arranged across said semiconductor plate in a direction intersecting the direction of movement of said moving yoke, whereby said magneto-resistance effect device includes a plurality of magnetism sensing parts which are formed with intervals therebetween said shorting segment being positioned within said intervals in the direction of movement of the moving yoke and wherein said magnetism sensing parts are adapted to simultaneously oppose said projected segments, wherein said both yokes are arranged so that a magnetic circuit is formed by said magnetism generating means and the magnetic flux crossing said gap at a right angle to the direction of movement of said moving yoke, and wherein the magnetic flux concentrated by said projected segment is applied to said magnetism sensing parts in sequence as said moving yoke moves.
Claim 3
Dependent Claim
71 words
A revolution sensing apparatus in accordance with claim 1, wherein said moving yoke has an axis of revolution and is adapted to revolve around said axis and said projected segments are arranged in the direction of revolution on said moving yoke in reference to the axis of revolution of said moving yoke and wherein said magneto-resistance effect device has a rectangular shape with its length along the direction of linear movement.
Claim 4
Dependent Claim
66 words
A revolution sensing apparatus in accordance with claim 1, further including a revolving shaft which can be revolved by the revolution torque of said machine and a conversion means which converts the revolution of said revolving shaft into linear movement and transmits said movement to said moving yoke, said moving yoke being adapted for linear movement and wherein said projected segments are arranged in a line.
Claim 5
Dependent Claim
72 words
A revolution sensing apparatus in accordance with claim 1, wherein said moving yoke includes an axis of revolution and is revolved about said axis, and wherein said projected segments are arranged in the direction of revolution on said moving yoke in reference to the axis of revolution of said moving yoke and said magneto-resistance effect device is formed in a shape of a partly chipped link concentrically about said axis of revolution.
Claim 6
Dependent Claim
86 words
A revolution sensing apparatus in accordance with claim 1, wherein said moving yoke includes an axis of revolution and is revolved about said axis and wherein said projected segments are arranged in the direction of revolution of said moving yoke in reference to the axis of revolution of said moving yoke, and wherein said magneto-resistance effect device is made in a long straight form and said shorting segments are radially provided in reference to a specified point on a line extending from said axis of revolution.
Claim 7
Dependent Claim
35 words
A revolution sensing apparatus in accordance with claim 1, wherein the length of the extreme end faceS of said projected segments is shorter than the length of said shorting segments provided in said same direction.
Claim 8
Dependent Claim
62 words
A revolution sensing apparatus in accordance with claim 1, wherein said magneto-resistance effect device is provided three terminals one formed at each end of the device and one formed at an intermediate part and magnetic flux is applied to the magnetism sensing parts of a pair of the device members alternately which are formed by dividing the device at said intermediate terminal.
Claim 9
Dependent Claim
67 words
A revolution sensing apparatus in accordance with claim 7, wherein said magneto-resistance effect device is formed in a dual link shape comprising a pair of partly chipped link type outer and inner device members the end of the outer device member being connected to the end of the inner device member and an intermediate terminal provided at a connected portion of said outer and inner device members.
Claim 10
Dependent Claim
20 words
A revolution sensing apparatus in accordance with claim 8, wherein said inner device member is formed in an eddy shape.
Claim 11
Dependent Claim
20 words
A revolution sensing apparatus in accordance with claim 8, wherein said inner device member is formed in a meandering shape.
Claim 12
Dependent Claim
37 words
A revolution sensing apparatus in accordance with claim 7, wherein said magneto-resistance effect device is formed in a partly chipped link shape, and said intermediate terminal is provided at the center between the ends of the device.
Claim 13
Dependent Claim
47 words
A revolution sensing apparatus in accordance with claim 7, wherein a pair of long straight shaped device members are arranged in parallel and said intermediate terminal is provided at the connected portion of one end of one device member and one end of the other device member.
Claim 14
Dependent Claim
55 words
A revolution sensing apparatus in accordance with claim 1, including a plurality of receiving projections opposing to said extreme end of said moving yoke on said flat part of the fixed yoke and wherein magneto-resistance effect devices are secured on said receiving projections so that said magnetism sensing parts are positioned on said receiving projections.
References Cited (Backward Citations)
US3671874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |