HK87685A - Tuning fork type piezo-electric vibrator - Google Patents
Tuning fork type piezo-electric vibratorInfo
- Publication number
- HK87685A HK87685A HK87685A HK87685A HK87685A HK 87685 A HK87685 A HK 87685A HK 87685 A HK87685 A HK 87685A HK 87685 A HK87685 A HK 87685A HK 87685 A HK87685 A HK 87685A
- Authority
- HK
- Hong Kong
- Prior art keywords
- tuning fork
- fork type
- electric vibrator
- type piezo
- piezo
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/21—Crystal tuning forks
- H03H9/215—Crystal tuning forks consisting of quartz
-
- 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
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15018278A JPS5575318A (en) | 1978-12-04 | 1978-12-04 | Tuning fork type oscillator |
JP15018678A JPS5575320A (en) | 1978-12-04 | 1978-12-04 | Frequency control method for tuning fork type oscillator |
JP15018378A JPS5575319A (en) | 1978-12-04 | 1978-12-04 | Tuning fork type oscillator |
Publications (1)
Publication Number | Publication Date |
---|---|
HK87685A true HK87685A (en) | 1985-11-15 |
Family
ID=27319878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK87685A HK87685A (en) | 1978-12-04 | 1985-11-07 | Tuning fork type piezo-electric vibrator |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2042799B (en) |
HK (1) | HK87685A (en) |
-
1979
- 1979-12-03 GB GB7941622A patent/GB2042799B/en not_active Expired
-
1985
- 1985-11-07 HK HK87685A patent/HK87685A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2042799B (en) | 1983-02-02 |
GB2042799A (en) | 1980-09-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE | Patent expired |