NL4801C - - Google Patents
Info
- Publication number
- NL4801C NL4801C NL4801DA NL4801C NL 4801 C NL4801 C NL 4801C NL 4801D A NL4801D A NL 4801DA NL 4801 C NL4801 C NL 4801C
- 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
- H04M1/34—Lost-motion or other arrangements for ensuring a pause between successive digit transmissions
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mechanisms For Operating Contacts (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Keying Circuit Devices (AREA)
- Transmission Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES54895D DE383231C (en) | 1920-12-01 | 1920-12-01 | Number switch for automatically or semi-automatically operated telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL4801C true NL4801C (en) |
Family
ID=7490097
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3096D NL3096C (en) | 1920-12-01 | ||
| NL4801D NL4801C (en) | 1920-12-01 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3096D NL3096C (en) | 1920-12-01 |
Country Status (2)
| Country | Link |
|---|---|
| DE (6) | DE383231C (en) |
| NL (2) | NL4801C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE822365C (en) * | 1949-10-04 | 1951-11-26 | Ruhrgas Ag | Pulse generator for remote transmission of electrical currents in continuously registering remote measuring systems |
| DE1161320B (en) * | 1961-08-24 | 1964-01-16 | Fernsprecher Ges M B H Deutsch | Telephone in which the apparatus housing can be placed on the mounting base with the number switch mounted |
| GB2048015A (en) * | 1979-01-08 | 1980-12-03 | Plessey Co Ltd | Dial units for telephone sets |
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0
- NL NL3096D patent/NL3096C/xx active
- DE DENDAT291849D patent/DE291849C/de active Active
- DE DENDAT276887D patent/DE276887C/de active Active
- DE DENDAT292121D patent/DE292121C/de active Active
- NL NL4801D patent/NL4801C/xx active
- DE DENDAT280700D patent/DE280700C/de active Active
- DE DENDAT284512D patent/DE284512C/de active Active
-
1920
- 1920-12-01 DE DES54895D patent/DE383231C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE276887C (en) | |
| DE280700C (en) | |
| DE284512C (en) | |
| NL3096C (en) | |
| DE383231C (en) | 1923-10-11 |
| DE292121C (en) | |
| DE291849C (en) |