BE382314A - - Google Patents
Info
- Publication number
- BE382314A BE382314A BE382314DA BE382314A BE 382314 A BE382314 A BE 382314A BE 382314D A BE382314D A BE 382314DA BE 382314 A BE382314 A BE 382314A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
- H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1930H0040230 DE567446C (de) | 1930-08-30 | 1930-08-30 | Alarmvorrichtung zur automatischen UEbermittlung eines Alarmrufes ueber die Teilnehmerleitung eines Selbstanschlussfernsprechnetzes |
| CH162598T | 1931-08-28 | ||
| GB25787/31A GB377489A (en) | 1930-08-30 | 1931-09-14 | Improvements in alarm devices for use in connection with telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE382314A true BE382314A (de) | 1931-09-30 |
Family
ID=10233294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE382314D BE382314A (de) | 1930-08-30 | 1931-08-28 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE382314A (de) |
| CH (1) | CH162598A (de) |
| DE (1) | DE567446C (de) |
| FR (1) | FR722639A (de) |
| GB (1) | GB377489A (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE896065C (de) * | 1950-06-07 | 1953-11-09 | Samuel Dunseith Mckellen | Alarmvorrichtung mit Waehlern zum selbsttaetigen Fernmeldeanschluss |
| DE1035700B (de) * | 1955-09-23 | 1958-08-07 | Siemens Ag | Schaltungsanordnung zur Abgabe von Meldungen ueber Fernsprechleitungen |
-
1930
- 1930-08-30 DE DE1930H0040230 patent/DE567446C/de not_active Expired
-
1931
- 1931-08-28 FR FR722639D patent/FR722639A/fr not_active Expired
- 1931-08-28 CH CH162598D patent/CH162598A/de unknown
- 1931-08-28 BE BE382314D patent/BE382314A/xx unknown
- 1931-09-14 GB GB25787/31A patent/GB377489A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH162598A (de) | 1933-06-30 |
| GB377489A (en) | 1932-07-28 |
| DE567446C (de) | 1933-01-03 |
| FR722639A (fr) | 1932-03-26 |