GB289649A - - Google Patents
Info
- Publication number
- GB289649A GB289649A GB1364327A GB1364327A GB289649A GB 289649 A GB289649 A GB 289649A GB 1364327 A GB1364327 A GB 1364327A GB 1364327 A GB1364327 A GB 1364327A GB 289649 A GB289649 A GB 289649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- station
- relay
- line
- district
- circuit
- 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
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000012790 confirmation Methods 0.000 abstract 1
- 230000008054 signal transmission Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES79776D DE546199C (de) | 1927-05-18 | 1927-05-18 | Schaltungsanordnung zur Fernuebertragung von Meldungen von einer Empfangsstelle zur anderen mit Sicherheitsschaltung |
Publications (1)
Publication Number | Publication Date |
---|---|
GB289649A true GB289649A (enrdf_load_stackoverflow) | 1928-05-03 |
Family
ID=7508430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1364327A Expired GB289649A (enrdf_load_stackoverflow) | 1927-05-18 | 1927-05-20 |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE546199C (enrdf_load_stackoverflow) |
GB (1) | GB289649A (enrdf_load_stackoverflow) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG119162A1 (en) * | 1998-06-15 | 2006-02-28 | Nohmi Bosai Ltd | Fire alarm system |
-
1927
- 1927-05-18 DE DES79776D patent/DE546199C/de not_active Expired
- 1927-05-20 GB GB1364327A patent/GB289649A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG119162A1 (en) * | 1998-06-15 | 2006-02-28 | Nohmi Bosai Ltd | Fire alarm system |
Also Published As
Publication number | Publication date |
---|---|
DE546199C (de) | 1932-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2568342A (en) | Signaling method and system | |
US2289517A (en) | Radio alarm system | |
GB289649A (enrdf_load_stackoverflow) | ||
US2181715A (en) | Secrecy intercommunicating telephone system | |
US3404236A (en) | Telephone automatic alarm apparatus | |
US2994860A (en) | Pulse transmission circuit | |
US1871457A (en) | Signaling system | |
US2187104A (en) | Signaling system | |
US1647284A (en) | Signaling system | |
US750270A (en) | Electric signaling apparatus | |
GB490015A (en) | Alarm signalling arrangements in connection with telephone and like exchange systems | |
GB679786A (en) | Improvements relating to remote control systems | |
US669832A (en) | Combined telephone and fire-alarm apparatus. | |
US2093884A (en) | Printing telegraph exchange system | |
JP2509584B2 (ja) | 配電系統の遠方監視装置 | |
US470667A (en) | Leeoy b | |
US807235A (en) | Alarm and telephone system. | |
GB281987A (en) | Improvements relating to electrical remote control and signalling systems | |
US1137152A (en) | Composite electric system. | |
US927414A (en) | Telephone system. | |
US494279A (en) | Morris martin | |
US669792A (en) | Combined telephone and alarm system. | |
US1165336A (en) | Magneto-switchboard cord-circuit. | |
US2364068A (en) | Remote control system | |
US1831901A (en) | Telephone system |