BE471218A - - Google Patents
Info
- Publication number
- BE471218A BE471218A BE471218DA BE471218A BE 471218 A BE471218 A BE 471218A BE 471218D A BE471218D A BE 471218DA BE 471218 A BE471218 A BE 471218A
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Electromechanical Clocks (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT264467X | 1946-03-14 | ||
| IT190846X | 1946-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE471218A true BE471218A (un) |
Family
ID=26327044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE471218D BE471218A (un) | 1946-03-14 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2542880A (un) |
| BE (1) | BE471218A (un) |
| CH (1) | CH264467A (un) |
| FR (1) | FR941383A (un) |
| GB (1) | GB637383A (un) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2839608A (en) * | 1954-05-12 | 1958-06-17 | Leon A Marsh | Telephone signaling device |
| US3001027A (en) * | 1960-04-07 | 1961-09-19 | Bell Telephone Labor Inc | Private line transfer switching circuit |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1306074A (en) * | 1919-06-10 | Signaling system | ||
| US825623A (en) * | 1904-04-26 | 1906-07-10 | Milo G Kellogg | Combined telephone and alarm system. |
| US1029577A (en) * | 1905-03-03 | 1912-06-11 | Edward E Clement | Telephone-exchange system. |
| US969393A (en) * | 1907-05-09 | 1910-09-06 | John E Shepherd | Combined telephone and protective alarm system. |
| US982052A (en) * | 1910-05-10 | 1911-01-17 | Internat Electric Prot Company | Electrical system for the supervision of watchmen. |
| US1063096A (en) * | 1912-08-23 | 1913-05-27 | Albert T Johnston | Signal system. |
| US1089404A (en) * | 1913-10-04 | 1914-03-10 | Denio General Electric Company | Fire-alarm signal-box for automatic telephone systems. |
| US1722447A (en) * | 1926-03-24 | 1929-07-30 | Internat Electrical Patents Co | Alarm |
| US1921615A (en) * | 1931-03-26 | 1933-08-08 | Garl Linnie | Combined fire and police alarm system |
| US2159650A (en) * | 1937-06-03 | 1939-05-23 | Hayward R Alker | Fire alarm |
-
0
- BE BE471218D patent/BE471218A/xx unknown
-
1947
- 1947-02-04 FR FR941383D patent/FR941383A/fr not_active Expired
- 1947-03-03 CH CH264467D patent/CH264467A/de unknown
- 1947-03-07 GB GB6505/47A patent/GB637383A/en not_active Expired
- 1947-03-13 US US734382A patent/US2542880A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB637383A (en) | 1950-05-17 |
| US2542880A (en) | 1951-02-20 |
| FR941383A (fr) | 1949-01-10 |
| CH264467A (de) | 1949-10-15 |