GB508828A - Improvements in and relating to measuring or verifying apparatus - Google Patents
Improvements in and relating to measuring or verifying apparatusInfo
- Publication number
- GB508828A GB508828A GB28923/38A GB2892338A GB508828A GB 508828 A GB508828 A GB 508828A GB 28923/38 A GB28923/38 A GB 28923/38A GB 2892338 A GB2892338 A GB 2892338A GB 508828 A GB508828 A GB 508828A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- pressure
- chambers
- orifices
- tubes
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
508,828. Gauging apparatus. SOC. ANON. DE CONSTRUCTION DE MATERIEL AUTOMOBILE S.A.C.M.A. Oct. 5, 1938, No. 28923. Convention date, Feb. 19. [Class 106 (ii)] Relates to apparatus. of the kind described in Specifications 326,674, [Class 106 (ii)], 341,365, 348,860, and 388,265 in which dimensions are verifed by measuring the pressure in the space between two orifices in series, through which pressure fluid flows, the second orifice having a section which is a function of the dimension to be measured, and consists in providing means to prevent ill-effects when the differences of pressure exceed a predetermined value. In the form shown in Fig. 1, the fluid under pressure is admitted by the conduit 1 and passes through orifices 2, 3 and the chamber 4 separating them, and also through orifices 2<1>, 3<1> and a chamber 4<1>. Between chambers 4, 4<1> is provided a manometer 5, and the pressure indicated represents the difference between orifices 3, 3<1>. To prevent damage due to excess pressure a byepass 6 between chambers 4, 4<1> is provided in which is a spring loaded valve 7 which opens when a predetermined pressure difference occurs. A partition 8 with orifice 9 is provided in one or other of chambers 4, 4<1>. In a modification, the screen 8 with orifice 9 is located in chamber 4<1> as well. In this case a second byepass is provided with the relief valve located in the opposite direction. In a second modification the valve ends of the byepasses are connected up stream of the screens 8. In a device with only the orifices 2, 3, the valve 7 opens the chamber 4 to the atmosphere. Two further forms are shown in which instead of valves, the safety device comprises tubes dipping into chambers containing a liquid forming a seal, the level of the liquid determining the pressure at which the chambers 4, 4<1> are thrown into communi- 'cation. On one of these the liquid chambers are provided with open-ended tubes above which and separate therefrom are fixed caps which prevent liquid being carried over with the gas. In Fig. 7 is shown an apparatus in which several individual measuring devices I, II, III are branched on a single supply conduit 1. Between I and II there are provided manometric columns 12, 121 from the chambers 4, 4<1> and between the columns is a diaphragm 16 dividing a box 17 into compartments communicating respectively with tubes 12, 121 The diaphragm is arranged between two rigid solid or perforated plates 18, 181 adapted to seat on ridges or projections 19, 191 on the box. When one of the discs seats on its ridges the pressure is no longer transmitted in the direction to move it. A byepass 20 connects the tubes 12, 12<1> and is provided with a fine throttle opening 21 which allows equalization during filling. A cock may be provided instead of the orifice. To maintain constant pressure in chamber 4, this communicates by a large conduit 22 with a chamber 23 a wall of which is constituted by a weighted diaphragm. Movements of this are transmitted to an obturator 27 controlling the supply of air. Between II and III the tubes 12, 12<1> connect with chambers 15, 151 the latter being open to the atmosphere. The chamber 15 is connected with a chamber 28 separated from chamber 4<2> by a partition with a throttle 9. Dampening devices 30 formed of a packing of wood or metal chips are provided as shown.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR842680T | 1938-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB508828A true GB508828A (en) | 1939-07-06 |
Family
ID=9311562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28923/38A Expired GB508828A (en) | 1938-02-19 | 1938-10-05 | Improvements in and relating to measuring or verifying apparatus |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR842680A (en) |
GB (1) | GB508828A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486052A (en) * | 1945-10-25 | 1949-10-25 | Moore Products Co | Pneumatic comparator gauge |
US2778218A (en) * | 1953-09-28 | 1957-01-22 | Charles L Sault | Meter and tank calibrating equipment |
US2790320A (en) * | 1954-01-11 | 1957-04-30 | Acf Ind Inc | Pneumatic flow-measuring device for fuel jets |
US4128002A (en) * | 1975-06-16 | 1978-12-05 | Automatic Oil Tools Limited | Meter proving apparatus |
GB2410332A (en) * | 2004-01-20 | 2005-07-27 | Duncan Clive Selby | Device for protecting a differential pressure sensor |
CN106681383A (en) * | 2017-01-23 | 2017-05-17 | 中国科学院理化技术研究所 | High-precision pressure control device |
-
1938
- 1938-02-19 FR FR842680D patent/FR842680A/en not_active Expired
- 1938-10-05 GB GB28923/38A patent/GB508828A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486052A (en) * | 1945-10-25 | 1949-10-25 | Moore Products Co | Pneumatic comparator gauge |
US2778218A (en) * | 1953-09-28 | 1957-01-22 | Charles L Sault | Meter and tank calibrating equipment |
US2790320A (en) * | 1954-01-11 | 1957-04-30 | Acf Ind Inc | Pneumatic flow-measuring device for fuel jets |
US4128002A (en) * | 1975-06-16 | 1978-12-05 | Automatic Oil Tools Limited | Meter proving apparatus |
GB2410332A (en) * | 2004-01-20 | 2005-07-27 | Duncan Clive Selby | Device for protecting a differential pressure sensor |
CN106681383A (en) * | 2017-01-23 | 2017-05-17 | 中国科学院理化技术研究所 | High-precision pressure control device |
CN106681383B (en) * | 2017-01-23 | 2023-07-28 | 中国科学院理化技术研究所 | High-precision pressure control device |
Also Published As
Publication number | Publication date |
---|---|
FR842680A (en) | 1939-06-16 |
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