NL38748C - - Google Patents
Info
- Publication number
- NL38748C NL38748C NL38748DA NL38748C NL 38748 C NL38748 C NL 38748C NL 38748D A NL38748D A NL 38748DA NL 38748 C NL38748 C NL 38748C
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR647953X | 1933-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL38748C true NL38748C (https=) |
Family
ID=9002374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL38748D NL38748C (https=) | 1933-01-13 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE400588A (https=) |
| DE (1) | DE647953C (https=) |
| FR (1) | FR749017A (https=) |
| GB (1) | GB419634A (https=) |
| NL (1) | NL38748C (https=) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE892631C (de) * | 1939-05-28 | 1953-10-08 | Hartmann & Braun Ag | Stoerungsunempfindlicher elektrischer Frequenzmesser, besonders fuer kleine Frequenzen |
| BE544673A (https=) * | 1955-04-13 |
-
0
- BE BE400588D patent/BE400588A/xx unknown
- NL NL38748D patent/NL38748C/xx active
-
1933
- 1933-01-13 FR FR749017D patent/FR749017A/fr not_active Expired
- 1933-08-09 DE DEC48162D patent/DE647953C/de not_active Expired
-
1934
- 1934-01-02 GB GB159/34A patent/GB419634A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE400588A (https=) | |
| FR749017A (fr) | 1933-07-17 |
| GB419634A (en) | 1934-11-15 |
| DE647953C (de) | 1937-07-17 |