GB689312A - Improvements in or relating to hydraulic servo control systems - Google Patents
Improvements in or relating to hydraulic servo control systemsInfo
- Publication number
- GB689312A GB689312A GB977749A GB977749A GB689312A GB 689312 A GB689312 A GB 689312A GB 977749 A GB977749 A GB 977749A GB 977749 A GB977749 A GB 977749A GB 689312 A GB689312 A GB 689312A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- valve
- cylinder
- pressure liquid
- aircraft
- 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
-
- 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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/895—Manual override
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
689,312. Fluid-pressure servomotor-control systems. GLENNY, A. P., SPENCER, D. L., and SPERRY GYROSCOPE CO., Ltd. March 31, 1950 [April 11, 1949], No. 9777/49. Class 135. A hydraulic servo-control system applicable, e.g. to an automatic system for controlling the direction of flight or the attitude of an aircraft, comprises a power piston 4 connected to a control surface of the aircraft, the opposite sides of the piston being interconnected through a by-pass controlled by a ball valve 11, and the opposite ends of the cylinder 1 connected through pipes 2, 3 to a pressure liquid supply valve 6. The pipe 3 has a waste ball valve 10. Thus, if the supply through the pipe 3 fails the valve 11 opens the by-pass and the valve 10 opens to connect the lower end of the cylinder to waste. The flow of pressure liquid to the pipe 2 is regulated by a control valve 7 connected by a wire 7a to a pulley 8 mounted upon a shaft connected to a constantly-driven motor through an electromagneticallycontrolled friction clutch, the current to which is regulated according to the deviation of the aircraft from its desired position. When the valve 7 is raised, pressure liquid flows to the upper end of the cylinder and moves the piston downwards by virtue of the greater area of the upper side of the piston exposed to liquid pressure. Downward movement of the valve 7 opens the upper end of the cylinder to waste and, when the supply of pressure liquid fails, permits manual operation of the power piston 4. The sectional area of the piston rod may be about one-half of that of the piston. In a modification, a by-pass between the opposite sides of the piston is provided by arranging a definite clearance between the piston and the cylinder and providing the piston with a groove for a rubber sealing ring. This construction permits manual operation of the piston.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB977749A GB689312A (en) | 1949-04-11 | 1949-04-11 | Improvements in or relating to hydraulic servo control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB977749A GB689312A (en) | 1949-04-11 | 1949-04-11 | Improvements in or relating to hydraulic servo control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB689312A true GB689312A (en) | 1953-03-25 |
Family
ID=9878564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB977749A Expired GB689312A (en) | 1949-04-11 | 1949-04-11 | Improvements in or relating to hydraulic servo control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB689312A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1230315B (en) * | 1959-07-28 | 1966-12-08 | Short Brothers & Harland Ltd | Reversible hydraulic fluid piston motor |
DE3301145A1 (en) * | 1983-01-14 | 1984-07-26 | Emil Dautel GmbH, 7105 Leingarten | Elevating gate with unidirectional hydraulic cylinder |
GB2232791A (en) * | 1989-05-22 | 1990-12-19 | Kugelfischer G Schaefer & Co | A pressure modulator |
-
1949
- 1949-04-11 GB GB977749A patent/GB689312A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1230315B (en) * | 1959-07-28 | 1966-12-08 | Short Brothers & Harland Ltd | Reversible hydraulic fluid piston motor |
DE3301145A1 (en) * | 1983-01-14 | 1984-07-26 | Emil Dautel GmbH, 7105 Leingarten | Elevating gate with unidirectional hydraulic cylinder |
GB2232791A (en) * | 1989-05-22 | 1990-12-19 | Kugelfischer G Schaefer & Co | A pressure modulator |
GB2232791B (en) * | 1989-05-22 | 1993-02-17 | Kugelfischer G Schaefer & Co | A pressure modulator |
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