GB1090021A - Improvements in or relating to fluid pressure control systems - Google Patents
Improvements in or relating to fluid pressure control systemsInfo
- Publication number
- GB1090021A GB1090021A GB1893863A GB1893863A GB1090021A GB 1090021 A GB1090021 A GB 1090021A GB 1893863 A GB1893863 A GB 1893863A GB 1893863 A GB1893863 A GB 1893863A GB 1090021 A GB1090021 A GB 1090021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- unit
- motor
- output
- conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
- G05D16/2046—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a single pressure from a plurality of converging pressures
- G05D16/2053—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a single pressure from a plurality of converging pressures the plurality of throttling means comprising only a first throttling means acting on a higher pressure and a second throttling means acting on a lower pressure, e.g. the atmosphere
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
- G05D16/206—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a plurality of diverging pressures from a single pressure
Abstract
1,090,021. Automatic pressure control. ELLIOTT BROS. (LONDON) Ltd. May 8, 1964 [May 13, 1963], No. 18938/63. Heading G3R. In a system for controlling fluid-pressure, a signal dependent on the pressure is compared with a desired value signal which is selected by a velodyne follow-up servo, any difference serving to correct the pressure automatically. A desired fluid-pressure in a conduit 4 is selected by a unit 13 controlling a velodyne follow-up servomotor 12 adjusting one input of a differential unit 10, the other input of which is adjusted by a capsule 9 in dependence on actual pressure. Any difference between the two inputs, representing a pressure error, produces an electrical output which, after amplification at 7, controls an electric motor 5 to correct the fluid-pressure in conduit 4 by adjusting a valve 3 associated with high and lowpressure sources 40, 41. The selected pressure is indicated by a unit 15 coupled through a synchro link 14 with motor 12. A preset angular correction unit (not shown) associated with the output of motor 12 compensates for any non-linearity. Alternatively a number of selectable detector units, each covering a narrow range of pressures, may be employed. By changing over a switch 18, rendering amplifier 7 inoperative, and closing the output of valve 3, motor 12 reduces the output of the differential unit 10 to zero so that unit 15 indicates the actual pressure in conduit 4 and any subsequent variation due to leakage. Periodic variation of pressure may be produced by applying a signal of appropriate waveform at 17. Motor 12 may be operated continuously to vary the pressure according to a predetermined law. A system having similar features and involving a control unit 33, a followup servomotor 32, a differential capsule 29, and a differential unit 30, controls a valve 23 to maintain a constant difference between the pressures in conduits 4 and 24.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1893863A GB1090021A (en) | 1963-05-13 | 1963-05-13 | Improvements in or relating to fluid pressure control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1893863A GB1090021A (en) | 1963-05-13 | 1963-05-13 | Improvements in or relating to fluid pressure control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1090021A true GB1090021A (en) | 1967-11-08 |
Family
ID=10121033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1893863A Expired GB1090021A (en) | 1963-05-13 | 1963-05-13 | Improvements in or relating to fluid pressure control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1090021A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181869A (en) * | 1983-05-06 | 1987-04-29 | Coherent Inc | Pressure regulating system for lasers |
-
1963
- 1963-05-13 GB GB1893863A patent/GB1090021A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181869A (en) * | 1983-05-06 | 1987-04-29 | Coherent Inc | Pressure regulating system for lasers |
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