GB926306A - Improvements in or relating to electromechanical filters - Google Patents
Improvements in or relating to electromechanical filtersInfo
- Publication number
- GB926306A GB926306A GB666061A GB666061A GB926306A GB 926306 A GB926306 A GB 926306A GB 666061 A GB666061 A GB 666061A GB 666061 A GB666061 A GB 666061A GB 926306 A GB926306 A GB 926306A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resonators
- coupling rods
- piezo
- soldered
- feb
- 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
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 238000005452 bending Methods 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 2
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/48—Coupling means therefor
- H03H9/50—Mechanical coupling means
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
926,306. Electromechanical filters. SIEMENS & HALSKE A.G. Feb. 23, 1961 [Feb. 26, 1960 (2)], No. 6660/61. Class 40 (8). An electromechanical filter comprises flexual resonators coupled by torsional elements. The resonators 5 are made of a steel alloy having a small coefficient of thermal expansion and are designed to operate in a bending mode with a central antinode and two symmetrical nodes at the points of attachment of coupling rods 6, 7. These operate in torsion and are non- resonant, i.e. the distance separating the resonators 5 is made smaller than a quarter of the wavelength in the resonators. The bent ends of the coupling rods are attached to a base. The input and output transducers consist of piezo-electric, rectangular, ceramic plates 8, 9 soldered at the mid-points to one or both sides of the first and last oscillators. The ceramic elements are electroded on their major faces and respond in an extensional mode which produces bending. The input and output may alternatively comprise bimorph transducers each having a pair of piezo-electric elements operating in mechanical antiphase. The coupling rods may be discontinuous, e.g. may comprise several short lengths screwed into or soldered to the long edges of the resonators.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0067298 | 1960-02-26 | ||
| DES67295A DE1206103B (en) | 1960-02-26 | 1960-02-26 | Electromechanical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB926306A true GB926306A (en) | 1963-05-15 |
Family
ID=25995996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB666061A Expired GB926306A (en) | 1960-02-26 | 1961-02-23 | Improvements in or relating to electromechanical filters |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE600604A (en) |
| CH (1) | CH399612A (en) |
| DE (1) | DE1206103B (en) |
| GB (1) | GB926306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458151A1 (en) * | 1979-05-30 | 1980-12-26 | Comp Generale Electricite | Composite piezoelectric transducer and resonator - has one or more piezoelectric plates soldered on each face of metal strip, opposing plates being staggered wrt one another |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE483369A (en) * | 1948-07-03 | |||
| US2814785A (en) * | 1955-07-29 | 1957-11-26 | Rca Corp | Electromechanical filter |
| US2905909A (en) * | 1956-04-16 | 1959-09-22 | Motorola Inc | Electromechanical filter |
-
1960
- 1960-02-26 DE DES67295A patent/DE1206103B/en active Pending
-
1961
- 1961-02-14 CH CH171061A patent/CH399612A/en unknown
- 1961-02-23 GB GB666061A patent/GB926306A/en not_active Expired
- 1961-02-24 BE BE600604A patent/BE600604A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458151A1 (en) * | 1979-05-30 | 1980-12-26 | Comp Generale Electricite | Composite piezoelectric transducer and resonator - has one or more piezoelectric plates soldered on each face of metal strip, opposing plates being staggered wrt one another |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1206103B (en) | 1965-12-02 |
| CH399612A (en) | 1965-09-30 |
| BE600604A (en) | 1961-06-16 |
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