NL31271C - - Google Patents
Info
- Publication number
- NL31271C NL31271C NL31271DA NL31271C NL 31271 C NL31271 C NL 31271C NL 31271D A NL31271D A NL 31271DA NL 31271 C NL31271 C NL 31271C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/32—Locking setting devices during transmission to prevent interference by user
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Keying Circuit Devices (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE579407T | 1930-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL31271C true NL31271C (en:Method) |
Family
ID=34584667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL31271D NL31271C (en:Method) | 1930-07-08 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE579407C (en:Method) |
| FR (1) | FR713878A (en:Method) |
| GB (1) | GB359852A (en:Method) |
| NL (1) | NL31271C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1007815B (de) * | 1951-12-26 | 1957-05-09 | Lorenz C Ag | Nummernschalter fuer Fernsprechgeraete mit einem von der Ablaufspindel gesteuerten Traegheitskontakt |
-
0
- NL NL31271D patent/NL31271C/xx active
-
1930
- 1930-07-08 DE DE1930579407D patent/DE579407C/de not_active Expired
-
1931
- 1931-03-02 GB GB646931A patent/GB359852A/en not_active Expired
- 1931-03-26 FR FR713878D patent/FR713878A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB359852A (en) | 1931-10-29 |
| DE579407C (de) | 1933-06-26 |
| FR713878A (fr) | 1931-11-04 |