Patent US4336657A successfully refreshed from Google Patents.
US4336657A
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US
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Position sensor
Assignee: Aisin Corp
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Filing: 1980-08-29
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Granted: 1982-06-29
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Expires: 2000-08-29
Abstract
Abstract A position sensor comprising a movable member functionally connected with an operative device and moving in response to a positional displacement of the operative device, a displacement-pulse phase conversion unit including a magnetically soft amorphous metal member undergoing stress variations produced by the displacement of the movable member and an electrical coil wound on the magnetically soft amorphous metal member. A pulse voltage is applied to one end of the electrical coil, the other end of which is connected in series with a resistor. A voltage across the resistor is detected, and a time lag of the resistor voltage with respect to the pulse voltage, representing a measure of displacement, is provided in the form of an analog voltage or a digital code.
Inventors
- 👤 Shinichiro Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/001; G01D; G01D5/00; G01D5/12; Y; Y10; Y10S; Y10S33/00; Y10S33/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
A position sensor for detecting displacement of an operative device, comprising: a movable member coupled to said operative device; core means including a magnetically soft amorphous metal member in which is produced a stress in response to the displacement of said movable member and an elastic member operatively connected to said movable member, said magnetically soft amorphous metal member being cemented integrally on a surface of said elastic member; electrical coil means including at least one coil wound on said core means for sensing a change in permeability of said magnetically soft amorphous metal member as produced by said displacement responsive stress; means for applying an electrical signal to said coil to saturate magnetically said core means; and means for producing a displacement output signal indicative of the displacement of said operative device based on the amount of time between application of said electrical signal and saturation of said core means.
Claim 2
Dependent Claim
151 words
A position sensor for detecting displacement of an operative device, comprising: a movable member coupled to said operative device; core means including a magnetically soft amorphous metal member in which is produced a stress in response to the displacement of said movable member and an elastic member operatively connected to said movable member, said magnetically soft amorphous metal member being cemented integrally on a surface of said elastic member; electrical coil means including at least one coil wound on said core means for sensing a change in permeability of said magnetically soft amorphous metal member as produced by said displacement responsive stress; means for applying an electrical signal to said coil to saturate magnetically said core means; and means for producing a displacement output signal indicative of the displacement of said operative device based on the amount of time between application of said electrical signal and saturation of said core means.
Claim 3
Dependent Claim
33 words
A position sensor according to claim 1, further comprising: an engaging member fixed to said movable member, said engaging member being connected to the magnetically soft amorphous metal member of said core means.
Claim 4
Dependent Claim
27 words
A position sensor according to claim 1, further comprising: said movable member including a cam surface coupled to said magnetically soft amorphous member of said core means.
Claim 5
Dependent Claim
31 words
A position sensor according to claim 1, further comprising: said movable member provided with means for producing an initial stress in the magnetically soft amorphous metal member of said core means.
Claim 6
Dependent Claim
55 words
A position sensor according to claim 4, further comprising: said core means comprising a pair of the magnetically soft amorphous metal members disposed in opposition to each other, one of the magnetically soft amorphous metal materials undergoing an increasing stress while the other undergoing a decreasing stress in response to displacement of the movable member.
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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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |