NL50376C - - Google Patents
Info
- Publication number
- NL50376C NL50376C NL50376DA NL50376C NL 50376 C NL50376 C NL 50376C NL 50376D A NL50376D A NL 50376DA NL 50376 C NL50376 C NL 50376C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2290337A GB501028A (en) | 1937-08-20 | 1937-08-20 | Improvements in or relating to electric signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL50376C true NL50376C (mo) |
Family
ID=10186920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL50376D NL50376C (mo) | 1937-08-20 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR842319A (mo) |
| GB (1) | GB501028A (mo) |
| NL (1) | NL50376C (mo) |
-
0
- NL NL50376D patent/NL50376C/xx active
-
1937
- 1937-08-20 GB GB2290337A patent/GB501028A/en not_active Expired
-
1938
- 1938-08-19 FR FR842319D patent/FR842319A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB501028A (en) | 1939-02-20 |
| FR842319A (fr) | 1939-06-09 |