Patent US3573520A successfully refreshed from Google Patents.
US3573520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating body having combined power generating and signal coupling system
Assignee: RTX Corp
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Filing: 1969-09-19
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Granted: 1971-04-06
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Expires: 1989-09-19
Abstract
Abstract A rotatable member is disposed for rotation in proximity with a stationary body, the rotatable member having an annular capacitive plate adapted for rotation immediately adjacent a plurality of magnetic teeth on the stationary body, the teeth and the annular plate forming a capacitor for coupling signals between the stationary body and rotatable member. At one point in the annular member is a magnetic head having a winding, the magnetic head passing over successive ones of the magnetic teeth generating electric current which is utilized on the rotating body to operate a transducer circuit, the output signal of which is coupled back through the capacitive coupling formed by the teeth in the annular surface to monitoring equipment located on the stationary body. The transducer circuit may include a power rectifier and voltage regulator which operates strain gauges, amplifiers and voltage control oscillators, the outputs of the voltage control oscillators may be multiplexed in the mixer prior to returning as a signal through the capacitive coupling.
Inventors
- 👤 Richard C Dorshimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
G; G08; G08C; G08C17/00; G08C17/06; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/225; H; H03; H03H; H03H7/00; H03H7/004; H01; H01F; H01F38/00; H01F38/14; H01F2038/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
232 words
A power-generating and signal-coupling system comprising: a stationary body including a stator comprising a plurality of magnetic teeth arranged annularly about an axis and electric signal responsive monitoring means electrically connected to said stator; and a rotatable member adapted for rotation about said axis, said rotatable member having an annular capacitor rotor surface adapted to rotate in close proximity with the teeth of said stator, said annular surface and said stator forming the two plates of a capacitive coupler, said rotating member including a magnetic head having a winding thereon disposed at one point along said annular surface, said magnetic head disposed to rotate past successive ones of the teeth of said stator in close proximity thereto, whereby the rotation of said magnetic head past each of said teeth generates an electric current in the winding of said magnetic head, said rotatable member including a transducer circuit powered by the electric current generated in said magnetic head and capable of generating at an output thereof, an output signal indicative of a property of said rotatable member, said output coupled to said annular member, so that as said rotatable member rotates relative to said stationary body, electric power is generated in said magnetic head and utilized to generate the signal indicative of a property on said rotating member, which signal is coupled through said annular member and said stator to said monitoring means.
Claim 2
Dependent Claim
232 words
A power-generating and signal-coupling system comprising: a stationary body including a stator comprising a plurality of magnetic teeth arranged annularly about an axis and electric signal responsive monitoring means electrically connected to said stator; and a rotatable member adapted for rotation about said axis, said rotatable member having an annular capacitor rotor surface adapted to rotate in close proximity with the teeth of said stator, said annular surface and said stator forming the two plates of a capacitive coupler, said rotating member including a magnetic head having a winding thereon disposed at one point along said annular surface, said magnetic head disposed to rotate past successive ones of the teeth of said stator in close proximity thereto, whereby the rotation of said magnetic head past each of said teeth generates an electric current in the winding of said magnetic head, said rotatable member including a transducer circuit powered by the electric current generated in said magnetic head and capable of generating at an output thereof, an output signal indicative of a property of said rotatable member, said output coupled to said annular member, so that as said rotatable member rotates relative to said stationary body, electric power is generated in said magnetic head and utilized to generate the signal indicative of a property on said rotating member, which signal is coupled through said annular member and said stator to said monitoring means.
Claim 3
Dependent Claim
60 words
A power-generating and signal-coupling system according to claim 1 wherein the teeth on said stator extend in a direction parallel with said axis and wherein said annular surface comprises a member having an annular opening in a direction parallel with said axis and oriented toward said nonrotating member and adapted to receive and rotate about said teeth of said stator.
Claim 4
Dependent Claim
30 words
A power-generAting and signal-coupling system according to claim 1 wherein said teeth are arranged on said stator in a radial direction and said annular surface is perpendicular to said axis.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |