FR749017A - Improvements to electric resonance devices - Google Patents
Improvements to electric resonance devicesInfo
- Publication number
- FR749017A FR749017A FR749017DA FR749017A FR 749017 A FR749017 A FR 749017A FR 749017D A FR749017D A FR 749017DA FR 749017 A FR749017 A FR 749017A
- Authority
- FR
- France
- Prior art keywords
- electric resonance
- resonance devices
- devices
- electric
- resonance
- 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
- 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)
- Relay Circuits (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR647953X | 1933-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR749017A true FR749017A (en) | 1933-07-17 |
Family
ID=9002374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR749017D Expired FR749017A (en) | 1933-01-13 | 1933-01-13 | Improvements to electric resonance devices |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE400588A (en) |
DE (1) | DE647953C (en) |
FR (1) | FR749017A (en) |
GB (1) | GB419634A (en) |
NL (1) | NL38748C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE892631C (en) * | 1939-05-28 | 1953-10-08 | Hartmann & Braun Ag | Interference-insensitive electrical frequency meter, especially for low frequencies |
BE544673A (en) * | 1955-04-13 |
-
0
- BE BE400588D patent/BE400588A/xx unknown
- NL NL38748D patent/NL38748C/xx active
-
1933
- 1933-01-13 FR FR749017D patent/FR749017A/en not_active Expired
- 1933-08-09 DE DEC48162D patent/DE647953C/en not_active Expired
-
1934
- 1934-01-02 GB GB159/34A patent/GB419634A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE647953C (en) | 1937-07-17 |
GB419634A (en) | 1934-11-15 |
BE400588A (en) | |
NL38748C (en) |
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