US4718276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angular motion sensor
Assignee: A-TECH Corp
•
Filing: 1986-04-10
•
Granted: 1988-01-12
•
Expires: 2006-04-10
Abstract
Abstract A solid electrode in the core of an angular motion sensor has a body of conductive fluid confined therein within an annular flux gap between axially spaced magnets. An arrangement of slots in the walls of the electrode modifies the current, induced in the fluid by inertial displacement, into a circumferential component, which is inductively coupled to an output winding from which an output signal is obtained.
Inventors
- 👤 Darren R. Laughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:40
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/0888; G01P15/006; G01P3/00; G01P3/42; G01P3/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
In angular motion sensor having an electrically conductive fluid flowing along a predetermined path, means for producing a magnetic field through which the fluid flows along said path and electrode means in contact with said fluid for detecting electric current induced therein, the improvement comprising means for modifying said induced current detected by the electrode means and coupling means mounted in inductive relation to the electrode means for converting the modified induced current into an output signal, said electrode means being a solid annular member within which the fluid is confined, said current modifying means comprising slot means formed in the member at angle to said path for producing a circumferential component of the induced current in the annular member inductively coupled to the coupling means.
Claim 2
Dependent Claim
126 words
In angular motion sensor having an electrically conductive fluid flowing along a predetermined path, means for producing a magnetic field through which the fluid flows along said path and electrode means in contact with said fluid for detecting electric current induced therein, the improvement comprising means for modifying said induced current detected by the electrode means and coupling means mounted in inductive relation to the electrode means for converting the modified induced current into an output signal, said electrode means being a solid annular member within which the fluid is confined, said current modifying means comprising slot means formed in the member at angle to said path for producing a circumferential component of the induced current in the annular member inductively coupled to the coupling means.
Claim 3
Dependent Claim
23 words
The improvement as defined in claim 1 wherein said predetermined path is a circle having an axis extending centrally through the electrode means.
Claim 4
Dependent Claim
36 words
The improvement as defined in claim 2 wherein said coupling means includes a core within which the electrode means is mounted and an output winding mounted in the core in inductive relation to the electrode means.
Claim 5
Dependent Claim
92 words
The improvement as defined in claim 2 wherein the solid annular member has radially outer and inner wall portions interconnected by a bottom wall portion to define an annular channel within which the fluid is confined, said slot means comprising a plurality of angularly spaced slots extending through said wall portions of the annular member intersecting the outer and inner wall portions at equal acute angles to said axis, and additional angularly spaced slots extending radially through the outer and inner wall portions in angularly spaced relation to said first mentioned slots.
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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |