BE721447A - - Google Patents
Info
- Publication number
- BE721447A BE721447A BE721447DA BE721447A BE 721447 A BE721447 A BE 721447A BE 721447D A BE721447D A BE 721447DA BE 721447 A BE721447 A BE 721447A
- Authority
- BE
- Belgium
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
- G08C25/02—Arrangements for preventing or correcting errors; Monitoring arrangements by signalling back receiving station to transmitting station
-
- 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
-
- 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
- H04Q9/14—Calling by using pulses
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0094710 | 1967-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE721447A true BE721447A (de) | 1969-03-03 |
Family
ID=6987742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE721447D BE721447A (de) | 1967-09-29 | 1968-09-26 |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT281911B (de) |
| BE (1) | BE721447A (de) |
| CH (1) | CH494666A (de) |
| DE (1) | DE1605390B2 (de) |
-
1967
- 1967-09-29 DE DE19671605390 patent/DE1605390B2/de active Pending
-
1968
- 1968-07-16 AT AT684068A patent/AT281911B/de not_active IP Right Cessation
- 1968-09-26 BE BE721447D patent/BE721447A/xx unknown
- 1968-09-27 CH CH1458768A patent/CH494666A/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AT281911B (de) | 1970-06-10 |
| CH494666A (de) | 1970-08-15 |
| DE1605390B2 (de) | 1973-06-14 |
| DE1605390A1 (de) | 1970-11-05 |