ZA742857B - Improvements in or relating to electronics switching circuits - Google Patents
Improvements in or relating to electronics switching circuitsInfo
- Publication number
- ZA742857B ZA742857B ZA00742857A ZA742857A ZA742857B ZA 742857 B ZA742857 B ZA 742857B ZA 00742857 A ZA00742857 A ZA 00742857A ZA 742857 A ZA742857 A ZA 742857A ZA 742857 B ZA742857 B ZA 742857B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- switching circuits
- electronics switching
- electronics
- circuits
- Prior art date
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
- H04M1/312—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 pulses produced by electronic circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Electronic Switches (AREA)
- Meter Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3161273A GB1404078A (en) | 1973-07-03 | 1973-07-03 | Telephone outpulser circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA742857B true ZA742857B (en) | 1975-03-26 |
Family
ID=10325756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA00742857A ZA742857B (en) | 1973-07-03 | 1974-05-06 | Improvements in or relating to electronics switching circuits |
Country Status (10)
| Country | Link |
|---|---|
| AR (1) | AR203751A1 (fr) |
| BE (1) | BE817196R (fr) |
| BR (1) | BR7405356A (fr) |
| DE (1) | DE2430740A1 (fr) |
| ES (1) | ES427877A1 (fr) |
| FR (1) | FR2236322B2 (fr) |
| GB (1) | GB1404078A (fr) |
| HK (1) | HK28877A (fr) |
| IT (1) | IT1015222B (fr) |
| ZA (1) | ZA742857B (fr) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3488450A (en) * | 1966-12-02 | 1970-01-06 | American Telephone & Telegraph | Sender for transmitting trains of pulses |
-
1973
- 1973-07-03 GB GB3161273A patent/GB1404078A/en not_active Expired
-
1974
- 1974-05-06 ZA ZA00742857A patent/ZA742857B/xx unknown
- 1974-06-20 IT IT24191/74A patent/IT1015222B/it active
- 1974-06-26 DE DE2430740A patent/DE2430740A1/de active Pending
- 1974-06-28 BR BR5356/74A patent/BR7405356A/pt unknown
- 1974-07-02 FR FR7422934A patent/FR2236322B2/fr not_active Expired
- 1974-07-02 ES ES427877A patent/ES427877A1/es not_active Expired
- 1974-07-03 BE BE2053727A patent/BE817196R/fr not_active IP Right Cessation
- 1974-07-04 AR AR254529A patent/AR203751A1/es active
-
1977
- 1977-06-09 HK HK288/77A patent/HK28877A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE817196R (fr) | 1975-01-03 |
| HK28877A (en) | 1977-06-17 |
| AU6914474A (en) | 1975-11-20 |
| IT1015222B (it) | 1977-05-10 |
| BR7405356A (pt) | 1976-08-31 |
| AR203751A1 (es) | 1975-10-15 |
| FR2236322B2 (fr) | 1978-11-24 |
| DE2430740A1 (de) | 1975-01-23 |
| FR2236322A2 (fr) | 1975-01-31 |
| ES427877A1 (es) | 1976-11-16 |
| GB1404078A (en) | 1975-08-28 |
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