CH233690A - Electromagnetic signal indicator. - Google Patents
Electromagnetic signal indicator.Info
- Publication number
- CH233690A CH233690A CH233690DA CH233690A CH 233690 A CH233690 A CH 233690A CH 233690D A CH233690D A CH 233690DA CH 233690 A CH233690 A CH 233690A
- Authority
- CH
- Switzerland
- Prior art keywords
- electromagnetic signal
- signal indicator
- indicator
- electromagnetic
- signal
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH903531X | 1943-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH233690A true CH233690A (en) | 1944-08-15 |
Family
ID=4546733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH233690D CH233690A (en) | 1943-02-26 | 1943-02-26 | Electromagnetic signal indicator. |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE454663A (en) |
| CH (1) | CH233690A (en) |
| FR (1) | FR903531A (en) |
-
0
- BE BE454663D patent/BE454663A/xx unknown
-
1943
- 1943-02-26 CH CH233690D patent/CH233690A/en unknown
-
1944
- 1944-03-22 FR FR903531D patent/FR903531A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE454663A (en) | |
| FR903531A (en) | 1945-10-08 |
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