FR984502A - Remote control and monitoring systems - Google Patents
Remote control and monitoring systemsInfo
- Publication number
- FR984502A FR984502A FR984502DA FR984502A FR 984502 A FR984502 A FR 984502A FR 984502D A FR984502D A FR 984502DA FR 984502 A FR984502 A FR 984502A
- Authority
- FR
- France
- Prior art keywords
- remote control
- monitoring systems
- monitoring
- systems
- remote
- 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
- 238000012544 monitoring process Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q9/08—Calling by using continuous ac
- H04Q9/12—Calling by using continuous ac using combinations of frequencies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
- B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
- B61L7/08—Circuitry
- B61L7/083—Common line wire control using currents of different amplitudes, polarities, frequencies, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR927883X | 1943-10-06 | ||
FR984502T | 1943-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR984502A true FR984502A (en) | 1951-07-06 |
Family
ID=66522889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR984502D Expired FR984502A (en) | 1943-10-06 | 1943-10-06 | Remote control and monitoring systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE927883C (en) |
FR (1) | FR984502A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1073073B (en) * | 1960-01-14 | Standard Elektrik Lorenz Aktien gesellschaft, Stuttgart-Zuffenhausen | Circuit arrangement for remote control systems for the transmission of grain mandos with a control station and several receiving stations | |
FR1254787A (en) * | 1959-04-23 | |||
DE1147148B (en) * | 1961-02-24 | 1963-04-11 | Telefunken Patent | Call receiver that responds to two frequency signals sent out in a specific time sequence |
DE1175125B (en) * | 1961-03-21 | 1964-07-30 | Telefonbau | Arrangement for the transmission of different messages over connection paths running between several sending and one receiving station |
-
1943
- 1943-10-06 FR FR984502D patent/FR984502A/en not_active Expired
-
1950
- 1950-10-01 DE DEM6801A patent/DE927883C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE927883C (en) | 1955-05-20 |
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