GB793014A - Improvements in and relating to automatic air flow controllers - Google Patents

Improvements in and relating to automatic air flow controllers

Info

Publication number
GB793014A
GB793014A GB2876054A GB2876054A GB793014A GB 793014 A GB793014 A GB 793014A GB 2876054 A GB2876054 A GB 2876054A GB 2876054 A GB2876054 A GB 2876054A GB 793014 A GB793014 A GB 793014A
Authority
GB
United Kingdom
Prior art keywords
controller
cabin
piston
pressure
flow
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
GB2876054A
Inventor
Donald John Leech
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.)
Normalair Ltd
Original Assignee
Normalair 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 Normalair Ltd filed Critical Normalair Ltd
Priority to GB2876054A priority Critical patent/GB793014A/en
Publication of GB793014A publication Critical patent/GB793014A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
    • B64D13/02—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being pressurised
    • 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
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
    • G05D16/106—Sleeve-like sensing elements; Sensing elements surrounded by the flow path

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)

Abstract

793,014. Fluid-pressure servomotor-control systems; valves. NORMALAIR, Ltd. Sept. 30, 1955 [Oct. 6, 1954], No. 28760/54. Class 135. An air flow controller suitable for use in aircraft cabin pressurizing systems consists of a valve sleeve 6 coacting with ports 7 in a cylinder 8 and connected by a tubular part 4 with a piston 1 which is subject on one side to the pressure of compressed air entering the controller at 12 and on the other side to a lower pressure. The lower pressure is that of air after passing through a restricted passage 14 in the piston 1 to a cylinder 3 in which the piston slides but before passing through openings 15 and a fixed tube 2 to a passage 17 terminating in an adjustable restriction 22 which discharges to the cabin space. The flow that the controller maintains substantially constant is selected by adjusting manually the orifice 22. The manual flow selection may be over-ridden by a temperature-responsive device. Also the restriction 22 may be arranged to be closed by a solenoid &c. in the event. of the cabin pressure dropping below a predetermined magnitude, for example in the case of a damaged cabin casing, so that the controller delivers maximum flow. Should the cabin altitude rise unduly a solenoid 25 causes a valve member 26 to engage a seating 27 which also causes maximum flow through the controller. When either the restriction 22 or the valve member 26 is closed the only escape for air from the cylinder 3 is through a fixed bleed 24. The piston and valve member are urged to the right by a pair of springs 20, 21 so arranged as to provide a variable rate.
GB2876054A 1954-10-06 1954-10-06 Improvements in and relating to automatic air flow controllers Expired GB793014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2876054A GB793014A (en) 1954-10-06 1954-10-06 Improvements in and relating to automatic air flow controllers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2876054A GB793014A (en) 1954-10-06 1954-10-06 Improvements in and relating to automatic air flow controllers

Publications (1)

Publication Number Publication Date
GB793014A true GB793014A (en) 1958-04-09

Family

ID=10280705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2876054A Expired GB793014A (en) 1954-10-06 1954-10-06 Improvements in and relating to automatic air flow controllers

Country Status (1)

Country Link
GB (1) GB793014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087935A2 (en) * 1982-02-25 1983-09-07 The Garrett Corporation Fluid flow control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087935A2 (en) * 1982-02-25 1983-09-07 The Garrett Corporation Fluid flow control system
EP0087935A3 (en) * 1982-02-25 1985-12-18 The Garrett Corporation Fluid flow control system

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