GB598050A - Improvements in electro-mechanical filters - Google Patents
Improvements in electro-mechanical filtersInfo
- Publication number
- GB598050A GB598050A GB1191544A GB1191544A GB598050A GB 598050 A GB598050 A GB 598050A GB 1191544 A GB1191544 A GB 1191544A GB 1191544 A GB1191544 A GB 1191544A GB 598050 A GB598050 A GB 598050A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reeds
- electro
- receivers
- band
- filter
- 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
- 244000273256 Phragmites communis Species 0.000 abstract 3
- 235000014676 Phragmites communis Nutrition 0.000 abstract 3
- 229910000639 Spring steel Inorganic materials 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000013016 damping Methods 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
598,050. Electro-mechanical filters. RANTZEN, H. B. June 22, 1944, No. 11915. [Class 40 (iii)] An electro-mechanical band-pass filter comprises two reeds mechanically coupled to one another by a spring and forming the armatures of two telephone-receiver magnets. The input and output terminals of the filter comprise the terminals of the coils of two 4000-ohm telephone receivers T1, T2. For the diaphragms are substituted two reeds R1, R2, Fig. 3 (plan), coupled together by a hair-pin S of spring steel wire, Fig. 4 (end elevation). The bases 13 of the receivers are mounted on low-frequency plate springs 18 to prevent stray coupling. The reeds are tuned by means of sliding weights 16 and the magnetic gaps can be changed by means of shims 15, the filter being adjusted to give a pass-band from 65 to 72 or 73 c./s. Damping is introduced by eddy currents induced by the poles 11 and can be varied for impedancematching by varying the polarizing current. Specification 489,075 is referred to.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB598050A true GB598050A (en) | 1948-02-10 |
Family
ID=1713421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1191544A Expired GB598050A (en) | 1944-06-22 | Improvements in electro-mechanical filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB598050A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1100834B (en) * | 1957-04-06 | 1961-03-02 | Telefunken Gmbh | Mechanical frequency filter |
| DE1262468B (en) * | 1959-11-26 | 1968-03-07 | Telefunken Patent | Mechanical filter, especially for frequencies in the range of around 20 kHz |
-
1944
- 1944-06-22 GB GB1191544A patent/GB598050A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1100834B (en) * | 1957-04-06 | 1961-03-02 | Telefunken Gmbh | Mechanical frequency filter |
| DE1262468B (en) * | 1959-11-26 | 1968-03-07 | Telefunken Patent | Mechanical filter, especially for frequencies in the range of around 20 kHz |
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