US3728955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and devices for regulating the pressure and its rate of variation in a chamber
Assignee: Airbus Group SAS
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Filing: 1971-02-02
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Granted: 1973-04-24
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Expires: 1991-02-02
Abstract
Abstract A method and devices for regulating the pressure of a compressible fluid in a chamber located in an atmosphere in which the pressure is variable, wherein a single pressure sensor inside the chamber is associated with electronic differential calculus means for generating an error signal and, thereafter, after summing said error signal with a repeater signal of the position of a valve for discharging said compressible fluid from said chamber, which chamber is continuously supplied with fluid by conventional means, a signal for actuating said valve.
Inventors
- 👤 P Ricaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:28
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A method of regulating the absolute pressure and the speed of variation of said absolute pressure of a compressible fluid inside a chamber continuously supplied with compressible fluid under pressure by conventional means, said chamber being placed in an atmosphere in which the pressure is liable to vary and communicating with said atmosphere by a regulated valve, comprising, in combination, the steps of measuring the pressure within said chamber with a single sensor deprived of mechanical friction providing an electrical translation of the value of said measured pressure, electronically processing said translation thereby to generate an error signal, of electronically summing said error signal with a signal translating the position of said valve for generating a control signal, and applying said control signal to a motor for actuating at least one associated valve for controlling communication between the interior of said chamber and said outside atmosphere.
Claim 2
Independent Claim
146 words
A method of regulating the absolute pressure and the speed of variation of said absolute pressure of a compressible fluid inside a chamber continuously supplied with compressible fluid under pressure by conventional means, said chamber being placed in an atmosphere in which the pressure is liable to vary and communicating with said atmosphere by a regulated valve, comprising, in combination, the steps of measuring the pressure within said chamber with a single sensor deprived of mechanical friction providing an electrical translation of the value of said measured pressure, electronically processing said translation thereby to generate an error signal, of electronically summing said error signal with a signal translating the position of said valve for generating a control signal, and applying said control signal to a motor for actuating at least one associated valve for controlling communication between the interior of said chamber and said outside atmosphere.
Claim 3
Dependent Claim
92 words
In a method as claimed in claim 1 the steps of electronically effecting a algebraic sum of three signals in direct relationship, respectively, firstly with an averaged value of the rate of change of the measured pressure, secondly with the value of the acceleration in the rate of change of said measured pressure comprising the second derivative of measured pressure signal, and thirdly with a preset rate of variation value, subsequent to a correction dependent on the actual internal pressure and upon a preset pressure, whereby to resultantly generate said error signal.
Claim 4
Dependent Claim
46 words
A method as claimed in claim 2, wherein said signal in direct Relationship with said measured pressure is subjected to two successive electronic differentiations, of which one supplies the rate of change of said measured pressure and the other the acceleration of said rate of change.
Claim 5
Dependent Claim
39 words
A method as claimed in claim 3, wherein said signal in direct relationship with the value of the acceleration in the rate of change of said measured pressure is used as an anticipation term in generating said error signal.
Claim 6
Dependent Claim
58 words
A method as claimed in claim 4, wherein said signal in direct relationship with the value of the measured pressure is subjected in succession to an electronic differentiation and to an electronic integration of its rapid variations, thereby to generate a signal in direct relationship with an averaged value of said rate of change of said measured pressure.
Claim 7
Dependent Claim
87 words
A method as claimed in claim 5, wherein a signal in direct relationship with a preset pressure is compared electronically with said signal in direct relationship with said measured pressure whereby to generate a corrected signal for the rate of variation of the preset absolute pressure, said comparison determining an algebraic addition of a portion of said signal in direct relationship with said measured pressure to said preset rate of absolute pressure variation signal, whereby the function represented by said corrected signal is linearized in absolute pressure.
Claim 8
Dependent Claim
31 words
A method as claimed in claim 6, wherein a single error signal is summed electronically with a plurality of signals each in direct relationship with the position of an associated valve.
Claim 9
Dependent Claim
97 words
A method as claimed in claim 7, wherein each signal for controlling an associated valve is generated by the electronic algebraic summing of an error signal, a signal in direct relationship with the position of said valve, to which signal are integrated its rapid variations, a signal in direct relationship with the derivative of the position of said valve, used as a damping term, and a signal in direct relationship with the derivative of said control signal, likewise used as a damping term, the whole in an electronic valve position repeater circuit driven by said error signal.
Claim 10
Dependent Claim
32 words
In a method as claimed in claim 8, a signal in direct relationship with the valve position generated by a inductive sensor deprived of mechanical friction mechanically connected to said associated valve.
Claim 11
Independent Claim
132 words
A device for regulating the pressure of a compressible fluid inside a chamber continuously supplied with fluid under pressure by conventional means, said chamber being placed in an atmosphere the pressure of which is liable to vary and being provided with at least one valve for controlling communication between the interior of said chamber and said atmosphere, comprising, in combination, a single sensor for sensing the internal pressure of said chamber, an electronic measuring and error signal generating circuit electrically connected to said sensor, to an electronic circuit for generating a signal repeating the position of said valve and a corresponding control signal for positioning the same, to an electronic power circuit and to a motor electrically connected to said power circuit and mechanically connected to the moving element of said valve.
Claim 12
Independent Claim
132 words
A device for regulating the pressure of a compressible fluid inside a chamber continuously supplied with fluid under pressure by conventional means, said chamber being placed in an atmosphere the pressure of which is liable to vary and being provided with at least one valve for controlling communication between the interior of said chamber and said atmosphere, comprising, in combination, a single sensor for sensing the internal pressure of said chamber, an electronic measuring and error signal generating circuit electrically connected to said sensor, to an electronic circuit for generating a signal repeating the position of said valve and a corresponding control signal for positioning the same, to an electronic power circuit and to a motor electrically connected to said power circuit and mechanically connected to the moving element of said valve.
Claim 13
Dependent Claim
41 words
In a device as claimed in claim 10, a sensor deprived of mechanical friction mechanically connected to its valve and delivering an electric signal indicative of the position thereof, said signal being utilized in a servo-ring for recopy of said position.
Claim 14
Dependent Claim
41 words
In a device as claimed in claim 10, an electric motor which has a control winding receiving said control signal and which is mechanically connected to the moving valve element, and an associated sensor of the position of said valve element.
Claim 15
Dependent Claim
76 words
In a device as claimed in claim 10, a valve provided with pneumatic servo-control means operatively connected to an electric torque motor receiving said control signals, a low pressure circuit comprising means for generating said low pressure pneumatically linked to said servo-control means, said generating means substracting a constant pressure value from the pressure value inside said chamber cabin, and means adjusted by said torque motor for applying said low pressure to the movable valve element.
Claim 16
Dependent Claim
58 words
In a device as claimed in claim 13, drive means for imperatively controlling valve opening and instant return of the valve to the regulating conditions through controlled release of said drive means from said movable valve element, and means for controlling imperative closure of said valve and latching thereof by virtue of the irreversibility of the action thereof.
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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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |