GB1469683A - Negative pressure detector - Google Patents
Negative pressure detectorInfo
- Publication number
- GB1469683A GB1469683A GB3462474A GB3462474A GB1469683A GB 1469683 A GB1469683 A GB 1469683A GB 3462474 A GB3462474 A GB 3462474A GB 3462474 A GB3462474 A GB 3462474A GB 1469683 A GB1469683 A GB 1469683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative pressure
- pressure detector
- leakage area
- chamber
- benson
- 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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
-
- 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
- G01L9/0005—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in capacitance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1469683 Capacitive pressure transducer BENSON SA 6 Aug 1974 34624/74 Heading G1N(A) A negative pressure detector comprises a floating element 4, Fig. 3 forming at the same time a detection element and the moving plate of an air capacitor. The bottom face of element 4 is metallized and coated with an insulating film 8. A printed circuit board 5 has two separate fixed capacitor plates 9 and 10 its dimensions being such that vents are provided between its edges and the opening 7 in base 6. When a depression is established in the upper end of chamber 2 the element 4 moves upwards to a position dependent on the leakage area between the element 4 and the wall of the frusto-conical chamber. In a further embodiment Fig. 1 (not shown) the leakage area is constant and the element 4 occupies one or other of two positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3462474A GB1469683A (en) | 1974-08-06 | 1974-08-06 | Negative pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3462474A GB1469683A (en) | 1974-08-06 | 1974-08-06 | Negative pressure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1469683A true GB1469683A (en) | 1977-04-06 |
Family
ID=10367970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3462474A Expired GB1469683A (en) | 1974-08-06 | 1974-08-06 | Negative pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1469683A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164583A (en) * | 1998-04-08 | 2000-12-26 | G.D S.P.A. | Method and a unit for feeding a strip of sheet material |
| CN110017954A (en) * | 2019-01-18 | 2019-07-16 | 德玛克（长兴）自动化***有限公司 | A kind of battery case detection of negative pressure equipment and its detection method |
| CN110346073A (en) * | 2019-07-08 | 2019-10-18 | 西安西电电气研究院有限责任公司 | Pressure between layers measuring device and method based on metallization film capacitor |
-
1974
- 1974-08-06 GB GB3462474A patent/GB1469683A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164583A (en) * | 1998-04-08 | 2000-12-26 | G.D S.P.A. | Method and a unit for feeding a strip of sheet material |
| CN110017954A (en) * | 2019-01-18 | 2019-07-16 | 德玛克（长兴）自动化***有限公司 | A kind of battery case detection of negative pressure equipment and its detection method |
| CN110346073A (en) * | 2019-07-08 | 2019-10-18 | 西安西电电气研究院有限责任公司 | Pressure between layers measuring device and method based on metallization film capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |