GB806749A - Improvements in and relating to fluid pressure displacement or force transmitters - Google Patents
Improvements in and relating to fluid pressure displacement or force transmittersInfo
- Publication number
- GB806749A GB806749A GB3399955A GB3399955A GB806749A GB 806749 A GB806749 A GB 806749A GB 3399955 A GB3399955 A GB 3399955A GB 3399955 A GB3399955 A GB 3399955A GB 806749 A GB806749 A GB 806749A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- amplifier
- pressure
- pipe
- nozzle
- 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
- F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
- F15B5/003—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities characterised by variation of the pressure in a nozzle or the like, e.g. nozzle-flapper system
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
806,749. Fluid-pressure servomotor-control systems. CAMBRIDGE INSTRUMENT CO. Ltd. Oct. 30, 1956 [Nov. 28, 1955], No. 33999/55. Class 135. A fixed pressure is supplied by a pipe 1, Fig. 1, to an amplifier 2 comprising concentric bellows 3, 4 having an outlet 6 controlled by a valve 7, the output being directed into a pipe 8. The displacement of a Bourdon tube, for example, is applied to a needle valve 10 controlling the output of a nozzle 11 mounted on two spring- urged bellows 12, 13 connected by an apertured plate 15 so that the bellows in a chamber 14 are subjected externally to nozzle pressure; amplifier output pressure is supplied to the inside of bellows 13 by a pipe 17 and the chamber 14 is open to the amplifier chamber around bellows 3, 4 by a pipe 18. The supply pressure to the nozzle 11 is taken from the amplifier output by a pipe 19 incorporating a fixed restriction 20. The amplifier is loaded by a spring 21 to ensure the transmitter is selfstarting. The effective area of bellows 4 is five times that of bellows 3. In a modification, the amplifier output is connected via a restriction 24, Fig. 2, to the chamber around the amplifier bellows as well as a fixed nozzle 25 controlled by a flapper 26 mounted upon bellows 27, the interior of which is open directly to amplifier output pressure by a pipe 28. The force to be measured is applied to a plate 29 on bellows 27 so that movement of the bellows 27 through the flapper 26 varies the back pressure in the nozzle 25 and hence the pressure in the amplifier chamber until the output pressure balances the applied force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3399955A GB806749A (en) | 1955-11-28 | 1955-11-28 | Improvements in and relating to fluid pressure displacement or force transmitters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3399955A GB806749A (en) | 1955-11-28 | 1955-11-28 | Improvements in and relating to fluid pressure displacement or force transmitters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB806749A true GB806749A (en) | 1958-12-31 |
Family
ID=10360104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3399955A Expired GB806749A (en) | 1955-11-28 | 1955-11-28 | Improvements in and relating to fluid pressure displacement or force transmitters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB806749A (en) |
-
1955
- 1955-11-28 GB GB3399955A patent/GB806749A/en not_active Expired
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