NL76872C - - Google Patents
Info
- Publication number
- NL76872C NL76872C NL76872DA NL76872C NL 76872 C NL76872 C NL 76872C NL 76872D A NL76872D A NL 76872DA NL 76872 C NL76872 C NL 76872C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
-
- 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)
- Electromagnetism (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH662917X | 1948-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL76872C true NL76872C (de) |
Family
ID=4527056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL76872D NL76872C (de) | 1948-11-11 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE854228C (de) |
| FR (1) | FR989893A (de) |
| GB (1) | GB662917A (de) |
| NL (1) | NL76872C (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL93661C (de) * | 1954-12-20 | |||
| BE544673A (de) * | 1955-04-13 | |||
| CH350051A (de) * | 1957-05-25 | 1960-11-15 | Zellweger Uster Ag | Elektromechanisches Bandfilter |
| CH571291A5 (de) * | 1972-06-12 | 1975-12-31 | Elresor Sa |
-
0
- NL NL76872D patent/NL76872C/xx active
-
1949
- 1949-06-29 FR FR989893D patent/FR989893A/fr not_active Expired
- 1949-10-28 GB GB27725/49A patent/GB662917A/en not_active Expired
- 1949-11-30 DE DEL504A patent/DE854228C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE854228C (de) | 1952-10-30 |
| GB662917A (en) | 1951-12-12 |
| FR989893A (fr) | 1951-09-14 |