JPS5321640B2 - - Google Patents
Info
- Publication number
- JPS5321640B2 JPS5321640B2 JP732844A JP284473A JPS5321640B2 JP S5321640 B2 JPS5321640 B2 JP S5321640B2 JP 732844 A JP732844 A JP 732844A JP 284473 A JP284473 A JP 284473A JP S5321640 B2 JPS5321640 B2 JP S5321640B2
- Authority
- JP
- Japan
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/06—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using power transmission lines
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Fire Alarms (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP732844A JPS5321640B2 (https=) | 1972-12-27 | 1972-12-27 | |
| US427712A US3895369A (en) | 1972-12-27 | 1973-12-26 | Supervisory system for abnormal conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP732844A JPS5321640B2 (https=) | 1972-12-27 | 1972-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4990096A JPS4990096A (https=) | 1974-08-28 |
| JPS5321640B2 true JPS5321640B2 (https=) | 1978-07-04 |
Family
ID=11540702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP732844A Expired JPS5321640B2 (https=) | 1972-12-27 | 1972-12-27 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3895369A (https=) |
| JP (1) | JPS5321640B2 (https=) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825518Y2 (ja) * | 1975-07-14 | 1983-06-01 | カブシキガイシヤ エコ− | ガスモレケイホウキノ シドウジカクニンソウチ |
| US4027286A (en) * | 1976-04-23 | 1977-05-31 | Trw Inc. | Multiplexed data monitoring system |
| JPS5534729A (en) * | 1978-08-31 | 1980-03-11 | Matsushita Electric Works Ltd | Disaster prevention equipment using timee sharing multiplex transmission |
| US4268822A (en) * | 1978-10-18 | 1981-05-19 | The Foxboro Company | Apparatus for determining the state of each of a plurality of bi-state devices |
| CH647361A5 (de) * | 1979-10-12 | 1985-01-15 | Zellweger Uster Ag | Verfahren und vorrichtung zur signalerkennung bei einem fernsteuersystem mit beeinflussung des nulldurchganges der netzwechselspannung. |
| IL88443A0 (en) * | 1988-11-22 | 1989-06-30 | Giora Harel | System and method for telemetering data |
| US5691691A (en) * | 1997-01-06 | 1997-11-25 | Motorola, Inc. | Power-line communication system using pulse transmission on the AC line |
| US5828293A (en) * | 1997-06-10 | 1998-10-27 | Northern Telecom Limited | Data transmission over a power line communications system |
| US7616968B2 (en) * | 2004-03-23 | 2009-11-10 | Mine Radio Systems Inc. | System and method to facilitate overcoming a degradation in transmission through a radiating transmission line communication system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3559176A (en) * | 1966-11-25 | 1971-01-26 | Hb Eng Corp | Method and system for locating faults in utility electrical power systems |
| US3550090A (en) * | 1968-01-16 | 1970-12-22 | Hb Eng Corp | Method and system for determining whether a switch is open or closed |
| US3689886A (en) * | 1971-02-09 | 1972-09-05 | Thomas Industries Inc | Control system having transmitter-receiver sets for operating functional device over power lines |
| CH540608A (de) * | 1971-07-01 | 1973-08-15 | Zellweger Uster Ag | Verfahren und Vorrichtung zur Fernübertragung eines Signales |
| DE2264025A1 (de) * | 1971-12-30 | 1973-07-05 | Yukio Honda | Informationssystem |
-
1972
- 1972-12-27 JP JP732844A patent/JPS5321640B2/ja not_active Expired
-
1973
- 1973-12-26 US US427712A patent/US3895369A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3895369A (en) | 1975-07-15 |
| JPS4990096A (https=) | 1974-08-28 |