GB551170A - Improvements in or relating to automatic control systems embodying servomotors - Google Patents
Improvements in or relating to automatic control systems embodying servomotorsInfo
- Publication number
- GB551170A GB551170A GB1012241A GB1012241A GB551170A GB 551170 A GB551170 A GB 551170A GB 1012241 A GB1012241 A GB 1012241A GB 1012241 A GB1012241 A GB 1012241A GB 551170 A GB551170 A GB 551170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- bellows
- valve
- automatic
- pipe
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
551,170. Automatic-control systems. SMITH & SONS (MOTOR ACCESSORIES), Ltd., S., and MEREDITH, F. W. Aug. 8, 1941, No. 10122. [Class 135] An automatic control system, particularly an automatic pilot for aircraft, comprising a servomotor having a control device operated by a " control " influenced by fluctuating external condi ions and arranged to maintain a steady predetermined condition in the system is provided with means for cutting the automatic system into and out of operation and with means for applying a balancing control to the control device which at the instant of cutting in the system is equal but of oppositive sign to the first control and with means for gradually removing the balancing control after the automatic control system has been cut in. The Figure shows the invention applied to an automatic pilot somewhat similar to that described in Specification 534,527. The power device 30 is controlled by a control.valve 20 actuated by a pair of opposed bellows 11, 15. A variable pressure corresponding to the deviation is applied through a pipe 10 to the bellows 11. 'The bellows 15 is connected through a pipe 38 with a follow-up bellows 39 operated by the power device and through a pipe 47 with an auxiliary, chamber housing a bellows 48. When the automatic control is in operation the bellows 48 is subject to a constant datum pressure maintained by a relief valve 54 and transmitted through a change-over valve 33. When the automatic control is cut out by interrupting the supply of motive fluid through a pipe 22, pressure acting on the valve 33 is removed and spring 57 moves this valve to connect the bellows 48 to the pipe 10. Under these conditions equal pressures are maintained in the bellows 11, 15 and the control valve held in its neutral position. When the automatic control is cut in, the valve 33 returns to its former position putting the loading of the bellows 48 again under the control of the relief valve 54. The pressure in the bellows 15 is thus restored to its datum value, but such restoration only takes place slowly owing to the provision of a restriction in the conduit 47.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1012241A GB551170A (en) | 1941-08-08 | 1941-08-08 | Improvements in or relating to automatic control systems embodying servomotors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1012241A GB551170A (en) | 1941-08-08 | 1941-08-08 | Improvements in or relating to automatic control systems embodying servomotors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB551170A true GB551170A (en) | 1943-02-10 |
Family
ID=9961901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1012241A Expired GB551170A (en) | 1941-08-08 | 1941-08-08 | Improvements in or relating to automatic control systems embodying servomotors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB551170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3489064A (en) * | 1966-09-05 | 1970-01-13 | Samson Apparatebau Ag | Fluid operated control methods and apparatus |
-
1941
- 1941-08-08 GB GB1012241A patent/GB551170A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3489064A (en) * | 1966-09-05 | 1970-01-13 | Samson Apparatebau Ag | Fluid operated control methods and apparatus |
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