HK28877A - Improvements in or relating to telephone outpulser circuits - Google Patents
Improvements in or relating to telephone outpulser circuitsInfo
- Publication number
- HK28877A HK28877A HK288/77A HK28877A HK28877A HK 28877 A HK28877 A HK 28877A HK 288/77 A HK288/77 A HK 288/77A HK 28877 A HK28877 A HK 28877A HK 28877 A HK28877 A HK 28877A
- Authority
- HK
- Hong Kong
- Prior art keywords
- outpulser
- telephone
- relating
- circuits
- telephone outpulser
- 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)
- Meter Arrangements (AREA)
- Electronic Switches (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 |
|---|---|
| HK28877A true HK28877A (en) | 1977-06-17 |
Family
ID=10325756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HK288/77A HK28877A (en) | 1973-07-03 | 1977-06-09 | Improvements in or relating to telephone outpulser circuits |
Country Status (10)
| Country | Link |
|---|---|
| AR (1) | AR203751A1 (pt) |
| BE (1) | BE817196R (pt) |
| BR (1) | BR7405356A (pt) |
| DE (1) | DE2430740A1 (pt) |
| ES (1) | ES427877A1 (pt) |
| FR (1) | FR2236322B2 (pt) |
| GB (1) | GB1404078A (pt) |
| HK (1) | HK28877A (pt) |
| IT (1) | IT1015222B (pt) |
| ZA (1) | ZA742857B (pt) |
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/xx 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 |
|---|---|
| ES427877A1 (es) | 1976-11-16 |
| BE817196R (fr) | 1975-01-03 |
| FR2236322B2 (pt) | 1978-11-24 |
| IT1015222B (it) | 1977-05-10 |
| BR7405356A (pt) | 1976-08-31 |
| DE2430740A1 (de) | 1975-01-23 |
| GB1404078A (en) | 1975-08-28 |
| FR2236322A2 (pt) | 1975-01-31 |
| AR203751A1 (es) | 1975-10-15 |
| ZA742857B (en) | 1975-03-26 |
| AU6914474A (en) | 1975-11-20 |
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