FR839804A - Filtres mécaniques - Google Patents
Filtres mécaniquesInfo
- Publication number
- FR839804A FR839804A FR839804DA FR839804A FR 839804 A FR839804 A FR 839804A FR 839804D A FR839804D A FR 839804DA FR 839804 A FR839804 A FR 839804A
- Authority
- FR
- France
- Prior art keywords
- mechanical filters
- filters
- mechanical
- 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
- H03H9/48—Coupling means therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/30—Electromagnetic relays specially adapted for actuation by ac
- H01H51/32—Frequency relays; Mechanically-tuned relays
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2194165X | 1937-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR839804A true FR839804A (fr) | 1939-04-13 |
Family
ID=7989490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR839804D Expired FR839804A (fr) | 1937-06-25 | 1938-06-24 | Filtres mécaniques |
Country Status (2)
Country | Link |
---|---|
US (1) | US2194165A (fr) |
FR (1) | FR839804A (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2420232A (en) * | 1942-12-21 | 1947-05-06 | Rca Corp | Signaling system |
-
1938
- 1938-06-24 FR FR839804D patent/FR839804A/fr not_active Expired
- 1938-06-24 US US215564A patent/US2194165A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2194165A (en) | 1940-03-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR820036A (fr) | Ravier | |
FI18708A (fi) | Kappsäck | |
FR836777A (fr) | Strapontin | |
FR839804A (fr) | Filtres mécaniques | |
FR826744A (fr) | Carburateur-mixte | |
FR831440A (fr) | Rectoscope | |
FR828826A (fr) | Perfectio | |
FR829480A (fr) | Vaso-compresseur-pulvérisateur | |
FR831093A (fr) | Spiraleur | |
FR828825A (fr) | Servo-embrayage | |
FR828072A (fr) | Face-à-main-bracelet | |
FR833531A (fr) | Stilligoutte | |
FR822718A (fr) | Hourdis | |
FR822687A (fr) | Chaussure-botte | |
FR834369A (fr) | Turbo-diffuseur | |
FR819452A (fr) | éclipseur | |
FI19833A (fi) | Moduleringsanordning | |
FI19157A (fi) | Kartongförpackning | |
FI20995A (fi) | Högtryckskvicksilverångurladdningslampa | |
FI20547A (fi) | Lösbar rörkoppling | |
FI20249A (fi) | Kvicksilverströmbrytare | |
FI20218A (fi) | Elektriskt vindkraftverk | |
FI20191A (fi) | Rörlig fjärrsignalkabelanläggning | |
FI19930A (fi) | Ljudisolationsplatta | |
FI24439A (fi) | Elektriskt urladdningsrör |