GB1436313A - Method and apparatus for measuring pressure - Google Patents
Method and apparatus for measuring pressureInfo
- Publication number
- GB1436313A GB1436313A GB4257772A GB4257772A GB1436313A GB 1436313 A GB1436313 A GB 1436313A GB 4257772 A GB4257772 A GB 4257772A GB 4257772 A GB4257772 A GB 4257772A GB 1436313 A GB1436313 A GB 1436313A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- sac
- tube
- core
- gauge
- 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
- 239000000463 material Substances 0.000 abstract 2
- 244000043261 Hevea brasiliensis Species 0.000 abstract 1
- 210000004381 amniotic fluid Anatomy 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 229920003052 natural elastomer Polymers 0.000 abstract 1
- 229920001194 natural rubber Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 229920001084 poly(chloroprene) Polymers 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 210000004291 uterus Anatomy 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
- G01L9/0004—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in inductance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/022—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges constructional details, e.g. mounting of elastically-deformable gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1436313 Measuring fluid pressure in body cavities NATIONAL RESEARCH DEVELOPMENT CORP 13 Sept 1973 [13 Sept 1972] 42577/72 Heading A5K [Also in Division G1] To measure pressure in a confined space a remote location e.g. the amniotic fluid pressure in the uterus, a sealed system is used comprising is tube 1 having a flexible sac 2, 3 at each end made of rubber or synthetic film material, the system being filled with a gas, e.g. air, at substantially atmospheric pressure, changes in the pressure on the sac 2 positioned in the confined space being conveyed to the sac 3 whose consequent volume changes are detected, e.g. by a transducer of a pressure gauge (Fig. 6). As shown the gauge may have a spring 20 which is movable in response to volume changes of the sac 3 to vary the air gap in a core 24 and thus change the mutual inductance between two coils mounted around the core. An oscillator (not shown) feeds one of the coils on core 24 and one coil of a compensating core. The other coil on cone 24 and the other coil of the compensator serve as series-connected sensing coils whose outputs are opposed. The sensing coils are connected to a phase sensitive amplifier which also receives a pilot signal from the oscillator. The gauge may be coupled to a pen recorder. Each sac 2, 3 may be detachable from the ends of the tube 1. If a plug and socket connection is used, then pressure within the system can be automatically restored on reconnection. The tube 1 may be made of plastics such as neoprene and the sacs of natural rubber. Alternatively the tube 1 and sacs 2, 3 may be defined between superposed welded sheets of a material such as p.v.c. enclosing a reinforcing tube of P.T.F.E., and in this case several tubes 1 and sacs 2, 3 can be provided side-by-side (Figs. 3 and 4-not shown) each for connection to a respective pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4257772A GB1436313A (en) | 1972-09-13 | 1972-09-13 | Method and apparatus for measuring pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4257772A GB1436313A (en) | 1972-09-13 | 1972-09-13 | Method and apparatus for measuring pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1436313A true GB1436313A (en) | 1976-05-19 |
Family
ID=10425051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4257772A Expired GB1436313A (en) | 1972-09-13 | 1972-09-13 | Method and apparatus for measuring pressure |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1436313A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3500822A1 (en) * | 1985-01-10 | 1986-07-10 | Spiegelberg, Andreas, Dipl.-Ing., 1000 Berlin | PRESSURE MEASUREMENT DEVICE |
| GB2250599A (en) * | 1990-12-05 | 1992-06-10 | Smiths Industries Plc | Cuff pressure monitor for a medico-surgical tube |
| GB2288023A (en) * | 1994-03-28 | 1995-10-04 | Richard Jonathan Sheridan | Device for indicating muscular effort during labour |
| US6041658A (en) * | 1997-11-18 | 2000-03-28 | Kavlico Corporation | Seat cushion pressure sensing system and method |
| CN102599900A (en) * | 2012-03-30 | 2012-07-25 | 上海应用技术学院 | Fluid pressure measuring sac tube |
| US20160061678A1 (en) * | 2014-08-26 | 2016-03-03 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Fluid pressure sensor |
| CN108204836A (en) * | 2017-12-25 | 2018-06-26 | 宁波精致诚检测技术服务有限公司 | A kind of environmental monitoring case of Portable movable |
| CN113063531A (en) * | 2021-04-08 | 2021-07-02 | 无锡科技职业学院 | Air bag type flexible film pressure sensor detection system |
| CN114812922A (en) * | 2022-04-11 | 2022-07-29 | 李新建 | A portable airbag pressure real-time monitoring alarm |
| CN115628780A (en) * | 2022-10-13 | 2023-01-20 | 河南省保时安电子科技有限公司 | Multifunctional detection equipment of miniature air pump for gas detector |
-
1972
- 1972-09-13 GB GB4257772A patent/GB1436313A/en not_active Expired
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3500822A1 (en) * | 1985-01-10 | 1986-07-10 | Spiegelberg, Andreas, Dipl.-Ing., 1000 Berlin | PRESSURE MEASUREMENT DEVICE |
| GB2250599A (en) * | 1990-12-05 | 1992-06-10 | Smiths Industries Plc | Cuff pressure monitor for a medico-surgical tube |
| US5218970A (en) * | 1990-12-05 | 1993-06-15 | Smiths Industries Public Limited Company | Tracheal tube cuff pressure monitor |
| GB2250599B (en) * | 1990-12-05 | 1994-08-24 | Smiths Industries Plc | Pressure monitors and tube assemblies |
| GB2288023A (en) * | 1994-03-28 | 1995-10-04 | Richard Jonathan Sheridan | Device for indicating muscular effort during labour |
| GB2288023B (en) * | 1994-03-28 | 1998-08-19 | Richard Jonathan Sheridan | Indicating device |
| US6041658A (en) * | 1997-11-18 | 2000-03-28 | Kavlico Corporation | Seat cushion pressure sensing system and method |
| CN102599900A (en) * | 2012-03-30 | 2012-07-25 | 上海应用技术学院 | Fluid pressure measuring sac tube |
| US20160061678A1 (en) * | 2014-08-26 | 2016-03-03 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Fluid pressure sensor |
| US9719876B2 (en) * | 2014-08-26 | 2017-08-01 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Fluid pressure sensor |
| CN108204836A (en) * | 2017-12-25 | 2018-06-26 | 宁波精致诚检测技术服务有限公司 | A kind of environmental monitoring case of Portable movable |
| CN108204836B (en) * | 2017-12-25 | 2020-04-17 | 宁波精致诚检测技术服务有限公司 | Portable mobilizable environment monitoring case |
| CN113063531A (en) * | 2021-04-08 | 2021-07-02 | 无锡科技职业学院 | Air bag type flexible film pressure sensor detection system |
| CN114812922A (en) * | 2022-04-11 | 2022-07-29 | 李新建 | A portable airbag pressure real-time monitoring alarm |
| CN115628780A (en) * | 2022-10-13 | 2023-01-20 | 河南省保时安电子科技有限公司 | Multifunctional detection equipment of miniature air pump for gas detector |
| CN115628780B (en) * | 2022-10-13 | 2023-03-21 | 河南省保时安电子科技有限公司 | Multifunctional detection equipment of miniature air pump for gas detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |