GB1349091A - Electro-mechanical resonant devices - Google Patents
Electro-mechanical resonant devicesInfo
- Publication number
- GB1349091A GB1349091A GB454071A GB1349091DA GB1349091A GB 1349091 A GB1349091 A GB 1349091A GB 454071 A GB454071 A GB 454071A GB 1349091D A GB1349091D A GB 1349091DA GB 1349091 A GB1349091 A GB 1349091A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- output
- turns
- reeds
- frequency
- 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
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
- H03H9/46—Filters
- H03H9/62—Filters comprising resonators of magnetostrictive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
1349091 Filters GEC-GENERAL SIGNAL Ltd 14 Feb 1972 [12 Feb 1971] 4540/71 Heading H3U A bandpass or frequency selecting filter comprises cantilevered, and fixed, nickel-iron alloy reeds 10, 26 forming cores for input windings 18, 20 having equal numbers of turns and inducing similarly directed flux in the reeds. The output circuit comprises coils 28, 30 connected in opposed phase senses, having equal numbers of turns, and magnetically coupled via reeds 10, 26 to coils 18, 20. When the input frequency substantially coincides with a flexural resonant frequency of reed 10, the latter, due to interaction of its induced magnetism with permanent magnet 14 vibrates, increasing the effective impedance of coil 18 and thus causing an imbalance between the voltages across coils 18 and 20, leading to an output at terminals 32. A component of such output is provided by generator action of coil 28; due to the varying reluctance of the magnetic path between reed 10 and magnet 14. As frequencies removed from resonance, the device is balanced, and no output is obtained. All coils may have an equal number of turns. The filter may be employed in the feedback loop of an oscillator, and receiving and transmitting oscillators of such type may be used in track circuit railway signalling systems of the type disclosed in Specification 869,896, operating at a specific frequency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB454071 | 1971-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1349091A true GB1349091A (en) | 1974-03-27 |
Family
ID=9779103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB454071A Expired GB1349091A (en) | 1971-02-12 | 1972-02-14 | Electro-mechanical resonant devices |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU459314B2 (en) |
| GB (1) | GB1349091A (en) |
| NL (1) | NL174315C (en) |
| ZA (1) | ZA72826B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2126447A (en) * | 1982-09-03 | 1984-03-21 | Combined Tech Corp Plc | Real-time Fourier transforming transducer and applications thereof |
| RU2521602C2 (en) * | 2010-05-05 | 2014-07-10 | Анатолий Сергеевич Поляков | Energy-saving balanced vibration motor |
| WO2019234101A1 (en) * | 2018-06-05 | 2019-12-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Electromechanical transmission device, systems having an electromechanical transmission device, and method for transmitting information |
-
1972
- 1972-02-08 ZA ZA720826A patent/ZA72826B/en unknown
- 1972-02-09 NL NLAANVRAGE7201716,A patent/NL174315C/en not_active IP Right Cessation
- 1972-02-10 AU AU38855/72A patent/AU459314B2/en not_active Expired
- 1972-02-14 GB GB454071A patent/GB1349091A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2126447A (en) * | 1982-09-03 | 1984-03-21 | Combined Tech Corp Plc | Real-time Fourier transforming transducer and applications thereof |
| RU2521602C2 (en) * | 2010-05-05 | 2014-07-10 | Анатолий Сергеевич Поляков | Energy-saving balanced vibration motor |
| WO2019234101A1 (en) * | 2018-06-05 | 2019-12-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Electromechanical transmission device, systems having an electromechanical transmission device, and method for transmitting information |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7201716A (en) | 1972-08-15 |
| NL174315B (en) | 1983-12-16 |
| AU459314B2 (en) | 1975-03-20 |
| ZA72826B (en) | 1972-10-25 |
| NL174315C (en) | 1984-05-16 |
| AU3885572A (en) | 1973-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |