GB1020261A - Fluid-pressure-operated control apparatus - Google Patents

Fluid-pressure-operated control apparatus

Info

Publication number
GB1020261A
GB1020261A GB4465262A GB4465262A GB1020261A GB 1020261 A GB1020261 A GB 1020261A GB 4465262 A GB4465262 A GB 4465262A GB 4465262 A GB4465262 A GB 4465262A GB 1020261 A GB1020261 A GB 1020261A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
vacuum
tube
chamber
master unit
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
GB4465262A
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.)
Robertshaw Controls Co
Original Assignee
Robertshaw Controls Co
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
Priority claimed from US154437A external-priority patent/US3142966A/en
Priority claimed from US190487A external-priority patent/US3221991A/en
Application filed by Robertshaw Controls Co filed Critical Robertshaw Controls Co
Priority to DEH43222U priority Critical patent/DE1906860U/en
Publication of GB1020261A publication Critical patent/GB1020261A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0638—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane characterised by the form of the obturator
    • G05D16/0641—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane characterised by the form of the obturator the obturator is a membrane

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • External Artificial Organs (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

1,020,261. Fluid pressure control systems. ROBERTSHAW CONTROLS CO. Nov. 26,1962 [Nov. 24,1961; April 26, 1962], No. 44652/62. Heading G3P. A vacuum-energized control system comprises a master unit 12, Fig. 1, (not shown), connected at 62 to a vacuum source 16 and a slave unit 14 operating a member 46 and connected by a conduit 32 with the master unit. A diaphragm 36 in the slave unit, connected to the member 46 and loaded by a spring 38, takes up a position dependent upon the degree of vacuum in a chamber 30. The spring load may be varied by an adjustable, external spring 58. The master unit comprises a diaphragm 76 subject on its lower surface to atmospheric pressure and coacting on its upper surface with a tube 60 communicating through a passage 64 with the vacuum source. Also coacting with the upper surface of the diaphragm is a spring-pressed disc 84 overlying an orifice 90 in the diaphragm. Withdrawal of the tube 60 from engagement with the diaphragm, by rotation of a screwed carrier, results in an increasing vacuum in the chambers 28 and 30 until the diaphragm 76 re-engages the tube 60, whilst downward movement of the tube 60 lifts the centre part of the diaphragm 76 away from the disc 84 to allow atmospheric air to pass through the aperture 90 and reduce the degree of vacuum until the diaphragm 76 has been depressed sufficiently to cause closure of the aperture 90. Adjustment of the tube 60 may be effected by temperature responsive means, and a number of master and slave unit combinations may be connected through a programme controller with the vacuum source so that they are brought into operation in a desired sequence and for a desired period of time. A single master unit may control a number of slave units. Fig. 11 illustrates a modified master unit in which a bowed spider 48<SP>1</SP>, of a material having a lower coefficient of thermal expansion than its housing 12<SP>1</SP>, causes variation of vacuum in a chamber 18<SP>1</SP> in response to temperature changes. The slave unit in this case may control hot or cold air dampers or heating or cooling apparatus for the space, e.g. a room, in which the master unit is situated. The spider 48<SP>1</SP> acts through an adjustable screw 62<SP>1</SP> on an apertured member 44<SP>1</SP> engaging a diaphragm 20<SP>1</SP> which coacts with a fixed tube 36<SP>1</SP> communicating with a vacuum source and is formed with an orifice 22<SP>1</SP> normally closed by a spring- pressed disc 24<SP>1</SP>. Leftward movement of the member 44<SP>1</SP> in response to increase of temperature results in opening of the orifice 22<SP>1</SP> so that atmospheric air can pass into the chamber 18<SP>1</SP> from apertures 46<SP>1</SP> in the member 44<SP>1</SP> and an opening 92<SP>1</SP>, and the resulting increase of pressure in the chamber 18<SP>1</SP>, which passes through a conduit 66 to the slave unit, reacts on the diaphragm to close the aperture 22<SP>1</SP>. Decrease of temperature causes the diaphragm to move away from the end of the tibe 36<SP>1</SP> to increase the vacuum in the chamber 18<SP>1</SP>. Adjustment of the controlled temperature is effected by rotation of the housing 12<SP>1</SP> which has screw-threaded engagement with a member 14<SP>1</SP>.
GB4465262A 1961-11-24 1962-10-22 Fluid-pressure-operated control apparatus Expired GB1020261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH43222U DE1906860U (en) 1961-12-13 1962-11-16 HYDRAULIC CONTROL DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US154437A US3142966A (en) 1961-11-24 1961-11-24 Vacuum servo system and the like
US190487A US3221991A (en) 1962-04-26 1962-04-26 Pneumatic thermostat and system controlled thereby

Publications (1)

Publication Number Publication Date
GB1020261A true GB1020261A (en) 1966-02-16

Family

ID=26851446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4465262A Expired GB1020261A (en) 1961-11-24 1962-10-22 Fluid-pressure-operated control apparatus

Country Status (3)

Country Link
CH (1) CH400781A (en)
DE (1) DE1426560B2 (en)
GB (1) GB1020261A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105088A (en) * 1977-03-07 1978-08-08 General Motors Corporation Servomotor with position feedback
DE3804851A1 (en) * 1987-10-17 1989-04-27 Teves Gmbh Alfred HYDRAULIC AMPLIFIER AND PRESSURE SOURCE FOR A HYDRAULIC AMPLIFIER

Also Published As

Publication number Publication date
CH400781A (en) 1965-10-15
DE1426560A1 (en) 1969-03-06
DE1426560B2 (en) 1971-11-18

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