GB814123A - Improvements in or relating to electro-mechanical crystal transducer elements exhibiting piezo electricity or ferro electricity - Google Patents
Improvements in or relating to electro-mechanical crystal transducer elements exhibiting piezo electricity or ferro electricityInfo
- Publication number
- GB814123A GB814123A GB8029/55A GB802955A GB814123A GB 814123 A GB814123 A GB 814123A GB 8029/55 A GB8029/55 A GB 8029/55A GB 802955 A GB802955 A GB 802955A GB 814123 A GB814123 A GB 814123A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arms
- electricity
- crystal
- axis
- electrodes
- 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 title abstract 6
- 230000005611 electricity Effects 0.000 title 1
- 230000001747 exhibiting effect Effects 0.000 title 1
- 230000005621 ferroelectricity Effects 0.000 title 1
- 238000010276 construction Methods 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
- QFJAZXGJBIMYLJ-UHFFFAOYSA-N 2,3-dihydroxybutanedioic acid;ethane-1,2-diamine Chemical compound NCCN.OC(=O)C(O)C(O)C(O)=O QFJAZXGJBIMYLJ-UHFFFAOYSA-N 0.000 abstract 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 abstract 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
- G04C3/12—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by piezoelectric means; driven by magneto-strictive means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
- H10N30/2044—Cantilevers, i.e. having one fixed end having multiple segments mechanically connected in series, e.g. zig-zag type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
814,123. Piezo-electric crystals. POSTMASTER GENERAL. May 25, 1956 [March 18, 1955], No. 8029/55. Class 40 (8). A piezo-electric or ferro-electric crystal element, e.g. of quartz, ethylene diamine tartrate, barium titanate or Rochelle salt, has cantilever arms which extend symmetrically from a common portion and means for exciting the arms into vibration in a flexural mode, the arms being so constructed and arranged that all the reactions in the region of the common portion are substantially balanced. The element may be of H-form cut from a rectangular quartz plate, the normal of which is rotated 5 degrees from the Z axis of the parent crystal towards the Y axis, the breadth being parallel to the X axis. The crystal is supported by terminals T1, T2 near its centre of gravity which connect with silvered electrodes, and by which the element is excited to vibrate in a flexural mode of frequency 2,676 kc./second at 20 C. The electrodes are disposed on the faces of the crystal and are indicated by shading in the drawings. The inner surfaces of the arms may also carry electrodes if desired. In an alternative construction the cross-section of each arm of an H-element increases with distance from the bridge-piece, so that the element vibrates at a lower frequency, viz. 1,930 kc./second at 20 C. In a further construction the element is of zig-zag form as illustrated in Fig. 2, or may have arms with more zig-zag bends than shown in that Figure. Alternatively, the element may comprise two C-shaped members arranged back to back, or may be of H-shape with lateral saw-cuts in the bridge portion, or may comprise symmetrically arranged cantilevers loaded at their free ends.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB814123A true GB814123A (en) | 1959-05-27 |
Family
ID=1629183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8029/55A Expired GB814123A (en) | 1955-03-18 | Improvements in or relating to electro-mechanical crystal transducer elements exhibiting piezo electricity or ferro electricity |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB814123A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3101421A (en) * | 1959-07-06 | 1963-08-20 | Acoustica Associates Inc | Elastic wave vibrator |
| DE1274257B (en) * | 1961-08-22 | 1968-08-01 | Toko Radio Coil Kenkyusho Kk | Electromechanical filter |
| US7567015B2 (en) * | 2006-03-03 | 2009-07-28 | Industrial Technology Research Institute | Composite mode transducer and cooling device having the composite mode transducer |
| WO2018099676A1 (en) * | 2016-11-29 | 2018-06-07 | Jaguar Land Rover Limited | Active vibration damper for a vehicle powertrain |
-
1955
- 1955-03-18 GB GB8029/55A patent/GB814123A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3101421A (en) * | 1959-07-06 | 1963-08-20 | Acoustica Associates Inc | Elastic wave vibrator |
| DE1274257B (en) * | 1961-08-22 | 1968-08-01 | Toko Radio Coil Kenkyusho Kk | Electromechanical filter |
| US7567015B2 (en) * | 2006-03-03 | 2009-07-28 | Industrial Technology Research Institute | Composite mode transducer and cooling device having the composite mode transducer |
| WO2018099676A1 (en) * | 2016-11-29 | 2018-06-07 | Jaguar Land Rover Limited | Active vibration damper for a vehicle powertrain |
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