GB571623A - Improvements in piezo-electric oscillators - Google Patents
Improvements in piezo-electric oscillatorsInfo
- Publication number
- GB571623A GB571623A GB302743A GB302743A GB571623A GB 571623 A GB571623 A GB 571623A GB 302743 A GB302743 A GB 302743A GB 302743 A GB302743 A GB 302743A GB 571623 A GB571623 A GB 571623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nodal lines
- crystal
- electrodes
- piezo
- faces
- 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
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
571,623. Piezo-electric crystals. GENERAL ELECTRIC CO., Ltd., and LEWER, S. K. Feb. 24, 1943, No. 3027. [Class 40 (v)] In a piezo-electric oscillator of the kind comprising a slab of crystal which when excited by a pair of electrodes on opposite faces oscillates so as to produce on said faces, a series of straight parallel nodal lines, at least one of the electrodes comprises a plurality of parallel ribs spaced apart by a distance equal to the distance between the nodal lines. Preferably both electrodes are so formed and are placed so that the ribs of both electrodes lie along nodal lines on both faces of the crystal. Then by moving the crystal in a direction perpendicular to the nodal lines a small change of frequency can be effected, the maximum change being when the movement equals half the distance between the nodal lines. An AT cut quartz crystal is described as a suitable example.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB302743A GB571623A (en) | 1943-02-24 | 1943-02-24 | Improvements in piezo-electric oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB302743A GB571623A (en) | 1943-02-24 | 1943-02-24 | Improvements in piezo-electric oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB571623A true GB571623A (en) | 1945-09-03 |
Family
ID=9750586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB302743A Expired GB571623A (en) | 1943-02-24 | 1943-02-24 | Improvements in piezo-electric oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB571623A (en) |
-
1943
- 1943-02-24 GB GB302743A patent/GB571623A/en not_active Expired
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