US4288746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring sensor
Assignee: WABCO WESTINGHOUSE GmbH
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Filing: 1978-10-23
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Granted: 1981-09-08
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Expires: 1998-10-23
Abstract
Abstract A speed measuring sensing device for producing a signal corresponding to the relative angular rotation between two structural members including a rotor arranged on the rotating member and a stator mounted on the stationary member. The stator is separated from the rotor by an air gap. The rotor includes a plurality of magnetizable sectors which vary the magnetic field while passing a pole shoe of the stator. The surface area of each of the magnetizable sectors of the rotor and the surface area of the pole shoe of the stator exhibit a maximum ratio of 1 to 1.
Inventors
- 👤 Gunther Singbartl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:33
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A speed measuring sensor for producing an output signal corresponding to the angular rotation between two relatively movable components and including a rotor driven by the rotating component and a stator carried by the stationary component, the stator includes only a single dependent cylindrical pole shoe, the pole shoe of the stator is separated from the rotor by an air gap, the rotor includes a ring-like magnetic member having a plurality of magnetizable projecting sectors of equal dimensions which change the magnetic field while passing the pole shoe of the stationary mounted stator, characterized in that the surface area of each of the plurality of the magnetizable sectors of the rotor and the surface area of the pole shoe of the stator exhibit a maximum ratio of 1 to 1 and in that the maximum cross sectional dimension of each of the magnetizable sectors of the rotor is equal to the maximum distance between two adjacent magnetizable sectors of the rotor so that spurious noise signals are minimized.
Claim 2
Dependent Claim
168 words
A speed measuring sensor for producing an output signal corresponding to the angular rotation between two relatively movable components and including a rotor driven by the rotating component and a stator carried by the stationary component, the stator includes only a single dependent cylindrical pole shoe, the pole shoe of the stator is separated from the rotor by an air gap, the rotor includes a ring-like magnetic member having a plurality of magnetizable projecting sectors of equal dimensions which change the magnetic field while passing the pole shoe of the stationary mounted stator, characterized in that the surface area of each of the plurality of the magnetizable sectors of the rotor and the surface area of the pole shoe of the stator exhibit a maximum ratio of 1 to 1 and in that the maximum cross sectional dimension of each of the magnetizable sectors of the rotor is equal to the maximum distance between two adjacent magnetizable sectors of the rotor so that spurious noise signals are minimized.
Claim 3
Dependent Claim
27 words
A speed measuring sensor according to claim 1, characterized in that each of the plurality of the magnetizable sectors of the rotor has a circular cross-sectional shape.
Claim 4
Dependent Claim
41 words
A speed measuring sensor according to claim 1, characterized in that the rotor includes recesses formed between the magnetizable sectors with the maximum dimension of each of the recesses equal to the maximum dimension of the pole shoe of the stator.
Claim 5
Dependent Claim
34 words
A speed measuring sensor according to claim 1, characterized in that each of the plurality of the magnetizable sectors of the rotor and the pole shoe of the stator are equal circular surface areas.
Claim 6
Dependent Claim
34 words
A speed measuring sensor according to claim 1, characterized in that each of the plurality of the magnetizable sectors of the rotor take form of cylindrical bodies arranged in peripheral alignment on the rotor.
Claim 7
Dependent Claim
33 words
A speed measuring sensor according to claim 1, characterized in that each of the plurality of the magnetizable sectors of the rotor has the same shape as the pole shoe of the stator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |