Patent US3645293A successfully refreshed from Google Patents.
US3645293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric to fluidic transducer
Assignee: Johnson Controls International Inc
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Filing: 1970-04-02
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Granted: 1972-02-29
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Expires: 1990-04-02
Abstract
Abstract The output of a fluidic amplifier is controlled by movement of a diaphragm with respect to the amplifier control nozzle. A permanent magnet magnetically coacts with a magnetizable portion of the diaphragm to provide a predetermined flux density to such portion. An electromagnetic coil is also positioned for magnetic interaction with the magnetizable portion of the diaphragm. When alternating current is applied to the electromagnetic coil of the transducer, the generated flux field interacts with that of the permanent magnet to change the flux field effective on the magnetizable portion. This causes the diaphragm to assume a new position with respect to the control nozzle for different current values applied to the coil, providing an output signal of the fluidic amplifier in accordance with the level of the energizing alternating current to the electromagnetic coil.
Inventors
- 👤 Niels E Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:27
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/8593; Y10T137/877
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
An electric to fluidic transducer comprising, a fluidic amplifier having a control nozzle, an output nozzle and a supply nozzle, said amplifier providing an output signal at said output nozzle under conditions where fluid under pressure is supplied to its said supply nozzle, said amplifier output signal being responsive to the flow of fluid through said control nozzle, a member mounted for movement with respect to said control nozzle for controlling the fluid emitted therefrom, said member including a magnetizable portion, magnet means magnetically biasing said magnetizable portion to a predetermined flux saturation level, electromagnetic means energizable by alternating current for generating a magnetic flux, said electromagnetic means being arranged for magnetic interaction with said magnet means flux acting on said magnetizable member for moving said member with respect to said control nozzle in accordance with the magnitude of the energizing alternating current.
Claim 2
Dependent Claim
143 words
An electric to fluidic transducer comprising, a fluidic amplifier having a control nozzle, an output nozzle and a supply nozzle, said amplifier providing an output signal at said output nozzle under conditions where fluid under pressure is supplied to its said supply nozzle, said amplifier output signal being responsive to the flow of fluid through said control nozzle, a member mounted for movement with respect to said control nozzle for controlling the fluid emitted therefrom, said member including a magnetizable portion, magnet means magnetically biasing said magnetizable portion to a predetermined flux saturation level, electromagnetic means energizable by alternating current for generating a magnetic flux, said electromagnetic means being arranged for magnetic interaction with said magnet means flux acting on said magnetizable member for moving said member with respect to said control nozzle in accordance with the magnitude of the energizing alternating current.
Claim 3
Dependent Claim
16 words
A transducer as set forth in claim 1 wherein said control member is of springlike material.
Claim 4
Dependent Claim
43 words
A transducer as set forth in claim 2 wherein said magnet means is selected of a magnetized level sufficient for substantially magnetically saturating said magnetizable portion for causing said output fluidic signal to be directly responsive to the magnitude of said alternating current.
Claim 5
Dependent Claim
16 words
A transducer as set forth in claim 3 wherein said magnet means is a permanent magnet.
Claim 6
Dependent Claim
50 words
A transducer as set forth in claim 2 wherein said magnet means is selected of a magnetized level sufficient for magnetizing said magnetizable portion at a level substantially below its magnetic saturated level for causing said output fluidic signal to be indirectly responsive to the magnitude of said alternating current.
Claim 7
Dependent Claim
16 words
A transducer as set forth in claim 5 wherein said magnet means is a permanent magnet.
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |