GB660182A - Improvements in or relating to a piezoelectric means for converting pressure variations - Google Patents
Improvements in or relating to a piezoelectric means for converting pressure variationsInfo
- Publication number
- GB660182A GB660182A GB18950/49A GB1895049A GB660182A GB 660182 A GB660182 A GB 660182A GB 18950/49 A GB18950/49 A GB 18950/49A GB 1895049 A GB1895049 A GB 1895049A GB 660182 A GB660182 A GB 660182A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- crystal
- rod
- axis
- casing
- 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
- 239000013078 crystal Substances 0.000 abstract 5
- 239000002826 coolant Substances 0.000 abstract 2
- 239000010453 quartz Substances 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000011324 bead Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
660,182. Electric measuring devices. SCHWEIZERISCHE LOKOMOTIV-UND MASCHINENFABRIK. July 19, 1949. [Aug. 6, 1948] No. 18950/49. Class 40 (i). [Also in Group XL (b)] In a piezo-electric device for measuring pressure, e.g. in an engine cylinder, the crystal unit comprises two juxtaposed semi-cylindrical quartz rods 1, 2, having their neutral axis 3 parallel to the pressure axis i.e. the rod axis, and their electrical axes 4, Fig. 2 oppositely poled and standing at right angles to the plane of separation. Thus only positive charges, for example, are set up on the curved surfaces of the rod which are earthed through the sleeve 5 accommodating the crystal rod. The charges set up on the plane adjacent crystal faces are taken up by a thin copper separating strip 9 and fed through a conductor 10 to a contact 11 in an amber insulating bushing 12. The crystal rod is prestressed axially between steel cylinders 6 tightly fitted in the sleeve 5 and the lower end 5b of the sleeve which takes the gas pressure. The tapered outer surface of the upper end of the sleeve 5 fits a correspondingly tapered bore of the casing 7 and is secured at its lower end by the peripheral bead of a diaphram 8 formed on the sleeve, which is rolled gastight in the foot of casing 7. Coolant water may be supplied through ducts-13 to the thin walled portion 5a of the sleeve 5 and a drying substance 14 absorbs any moisture present at assembly, or which may penetrate from the coolant chamber into the quartz chamber. The sleeve wall 5a is made thin at 5a where it embraces the crystal to enhance sensitivity, but in a modification, Fig. 4 (not shown) this wall is made thicker but corrugated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH660182X | 1948-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB660182A true GB660182A (en) | 1951-10-31 |
Family
ID=4526831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18950/49A Expired GB660182A (en) | 1948-08-06 | 1949-07-19 | Improvements in or relating to a piezoelectric means for converting pressure variations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB660182A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3150274A (en) * | 1959-10-02 | 1964-09-22 | List Hans | Piezoelectric pressure transducer |
-
1949
- 1949-07-19 GB GB18950/49A patent/GB660182A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3150274A (en) * | 1959-10-02 | 1964-09-22 | List Hans | Piezoelectric pressure transducer |
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