SE368894B - - Google Patents
Info
- Publication number
- SE368894B SE368894B SE1074664A SE1074664A SE368894B SE 368894 B SE368894 B SE 368894B SE 1074664 A SE1074664 A SE 1074664A SE 1074664 A SE1074664 A SE 1074664A SE 368894 B SE368894 B SE 368894B
- Authority
- SE
- Sweden
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
-
- 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
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Push-Button Switches (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES87233A DE1179264B (en) | 1963-09-11 | 1963-09-11 | Circuit arrangement for telephone stations with control keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE368894B true SE368894B (en) | 1974-07-22 |
Family
ID=7513609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1074664A SE368894B (en) | 1963-09-11 | 1964-09-07 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE652976A (en) |
| CH (1) | CH423889A (en) |
| DE (1) | DE1179264B (en) |
| GB (1) | GB1030074A (en) |
| NL (1) | NL145737B (en) |
| SE (1) | SE368894B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800419A (en) * | 2016-09-07 | 2018-03-13 | 宏百贸易有限公司 | A kind of button, electronic circuit, keyboard |
-
1963
- 1963-09-11 DE DES87233A patent/DE1179264B/en active Pending
-
1964
- 1964-09-07 SE SE1074664A patent/SE368894B/xx unknown
- 1964-09-09 CH CH1174164A patent/CH423889A/en unknown
- 1964-09-09 GB GB3687064A patent/GB1030074A/en not_active Expired
- 1964-09-10 NL NL6410546A patent/NL145737B/en unknown
- 1964-09-11 BE BE652976D patent/BE652976A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE652976A (en) | 1965-03-11 |
| NL6410546A (en) | 1965-03-12 |
| DE1179264B (en) | 1964-10-08 |
| NL145737B (en) | 1975-04-15 |
| GB1030074A (en) | 1966-05-18 |
| CH423889A (en) | 1966-11-15 |