GB1090021A - Improvements in or relating to fluid pressure control systems - Google Patents

Improvements in or relating to fluid pressure control systems

Info

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
Application number
GB1893863A
Inventor
Hubert Ronald Bristow
John Francis Anthony Parkes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Priority to GB1893863A priority Critical patent/GB1090021A/en
Publication of GB1090021A publication Critical patent/GB1090021A/en
Expired legal-status Critical Current

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.
GB1893863A 1963-05-13 1963-05-13 Improvements in or relating to fluid pressure control systems Expired GB1090021A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181869A (en) * 1983-05-06 1987-04-29 Coherent Inc Pressure regulating system for lasers

Cited By (1)

* Cited by examiner, † Cited by third party
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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