GB1378558A - Electromechanicl filters - Google Patents
Electromechanicl filtersInfo
- Publication number
- GB1378558A GB1378558A GB4038272A GB4038272A GB1378558A GB 1378558 A GB1378558 A GB 1378558A GB 4038272 A GB4038272 A GB 4038272A GB 4038272 A GB4038272 A GB 4038272A GB 1378558 A GB1378558 A GB 1378558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flats
- resonator
- resonators
- nodes
- wires
- 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
- 238000005452 bending Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
- A01N35/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing aliphatically bound aldehyde or keto groups, or thio analogues thereof; Derivatives thereof, e.g. acetals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/34—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
1378558 Electromechanical filters SIEMENS AG 31 Aug 1972 [13 Sept 1971] 40382/72 Heading H3U In an electromechanical filter comprising a plurality of intermediate metallic bending mode resonators 1 with flats 9, coupled together, and to end resonators 8, 8<SP>1</SP> with soldered-on piezoceramic transducers, by a spot-welded thin coupling wire 2, support wires 3 are welded to the resonators at positions corresponding to nodes of bending oscillations in the mode producing two nodes in each resonator. Additionally, legs 4 support each resonator at the same nodal positons. Coupling wire 2 may be at an antinode of each resonator Fig. 1, or for smaller relative bandwidth, for example 1% at 30 kHz, may be displaced to one side, Fig. 2 (not shown). The flats 9 may be adjacent the wires 2, 3, Fig. 4 (not shown), or diametrically opposed to them, Fig. 3 (not shown). The construction of Fig. 1 serves for relative bandwidth down to 2%, for example 3À3%. The plane of flats 9 is parallel to base-plate 5. Reference has been directed by the Comptroller to Specification 1,160,507.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712145716 DE2145716C3 (en) | 1971-09-13 | Method of making a low bandwidth mechanical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1378558A true GB1378558A (en) | 1974-12-27 |
Family
ID=5819416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4038272A Expired GB1378558A (en) | 1971-09-13 | 1972-08-31 | Electromechanicl filters |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT321369B (en) |
| BE (1) | BE788774A (en) |
| FR (1) | FR2153932A5 (en) |
| GB (1) | GB1378558A (en) |
| IL (1) | IL40301A (en) |
| IT (1) | IT967258B (en) |
| NL (1) | NL153394B (en) |
| SE (1) | SE396176B (en) |
| YU (1) | YU35300B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187458A (en) * | 1989-09-21 | 1993-02-16 | Nihon Musen Kabushiki Kaisha | Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same |
-
0
- BE BE788774D patent/BE788774A/en unknown
-
1972
- 1972-08-31 GB GB4038272A patent/GB1378558A/en not_active Expired
- 1972-09-05 IL IL40301A patent/IL40301A/en unknown
- 1972-09-08 IT IT7228948A patent/IT967258B/en active
- 1972-09-08 FR FR7231858A patent/FR2153932A5/fr not_active Expired
- 1972-09-11 YU YU2312/72A patent/YU35300B/en unknown
- 1972-09-12 NL NL727212379A patent/NL153394B/en not_active IP Right Cessation
- 1972-09-12 SE SE7211749A patent/SE396176B/en unknown
- 1972-09-12 AT AT780872A patent/AT321369B/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187458A (en) * | 1989-09-21 | 1993-02-16 | Nihon Musen Kabushiki Kaisha | Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same |
| US5528806A (en) * | 1989-09-21 | 1996-06-25 | Nihon Musen Kabushiki Kaisha | Tunable composite longitudinal vibration mechanical filter manufacturing method |
| US5740595A (en) * | 1989-09-21 | 1998-04-21 | Nihon Musen Kabushiki Kaisha | Composite longitudinal vibration mechanical filter's method of manufacturing including undesired vibration absorber |
| US5751200A (en) * | 1989-09-21 | 1998-05-12 | Nihon Musen Kabushiki Kaisha | Composite longitudinal vibration mechanical filter having undesired vibration absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| IT967258B (en) | 1974-02-28 |
| DE2145716B2 (en) | 1975-08-28 |
| DE2145716A1 (en) | 1973-03-29 |
| IL40301A0 (en) | 1972-11-28 |
| YU35300B (en) | 1980-10-31 |
| IL40301A (en) | 1975-03-13 |
| BE788774A (en) | 1973-01-02 |
| FR2153932A5 (en) | 1973-05-04 |
| AT321369B (en) | 1975-03-25 |
| SE396176B (en) | 1977-09-05 |
| YU231272A (en) | 1980-04-30 |
| NL153394B (en) | 1977-05-16 |
| NL7212379A (en) | 1973-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |