CH600697A5 - - Google Patents
Info
- Publication number
- CH600697A5 CH600697A5 CH521176A CH521176A CH600697A5 CH 600697 A5 CH600697 A5 CH 600697A5 CH 521176 A CH521176 A CH 521176A CH 521176 A CH521176 A CH 521176A CH 600697 A5 CH600697 A5 CH 600697A5
- Authority
- CH
- Switzerland
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/006—Circuits for increasing the range of current supply source
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/571,868 US3992591A (en) | 1975-04-25 | 1975-04-25 | Telephone line battery boost circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH600697A5 true CH600697A5 (xx) | 1978-06-30 |
Family
ID=24285384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH521176A CH600697A5 (xx) | 1975-04-25 | 1976-04-26 |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3992591A (xx) |
| JP (1) | JPS51131207A (xx) |
| AU (1) | AU497830B2 (xx) |
| BE (1) | BE840907A (xx) |
| CA (1) | CA1019857A (xx) |
| CH (1) | CH600697A5 (xx) |
| DE (1) | DE2617523A1 (xx) |
| ES (1) | ES447270A1 (xx) |
| FR (1) | FR2309090A1 (xx) |
| GB (1) | GB1542148A (xx) |
| NL (1) | NL7604366A (xx) |
| SE (1) | SE7604096L (xx) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1069232A (en) * | 1976-04-28 | 1980-01-01 | Frederick J. Glenn | Loop extender |
| US4127747A (en) * | 1977-09-23 | 1978-11-28 | Northern Telecom Limited | Voltage boost circuit for telephone systems |
| US4380688A (en) * | 1981-07-13 | 1983-04-19 | Tii Industries Inc. | Telephone ringing range extender |
| GB2383919B (en) * | 2002-01-04 | 2005-01-26 | Fujitsu Ltd | Line extender |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781480A (en) * | 1970-11-10 | 1973-12-25 | Wescom | Loop extender |
| US3757052A (en) * | 1971-10-19 | 1973-09-04 | Electro Dynamics & Telecom Ltd | Telephone line extender with test thru capability |
| US3898389A (en) * | 1972-10-18 | 1975-08-05 | Communic Mfg | Voltage and/or current-sensitive loop extender |
| US3819866A (en) * | 1972-12-18 | 1974-06-25 | Bell Telephone Labor Inc | Light coupled loop current detector |
| US3872258A (en) * | 1974-01-28 | 1975-03-18 | Lorain Prod Corp | Voltage booster circuit for telephone systems |
| US3906162A (en) * | 1974-07-30 | 1975-09-16 | Communic Mfg | Loop extender with bypass capacitor discharge |
-
1975
- 1975-04-25 US US05/571,868 patent/US3992591A/en not_active Expired - Lifetime
-
1976
- 1976-03-29 CA CA249,015A patent/CA1019857A/en not_active Expired
- 1976-04-07 SE SE7604096A patent/SE7604096L/xx unknown
- 1976-04-20 BE BE166285A patent/BE840907A/xx unknown
- 1976-04-21 AU AU13188/76A patent/AU497830B2/en not_active Expired
- 1976-04-21 GB GB7616217A patent/GB1542148A/en not_active Expired
- 1976-04-22 DE DE19762617523 patent/DE2617523A1/de active Pending
- 1976-04-22 FR FR7611842A patent/FR2309090A1/fr active Granted
- 1976-04-23 NL NL7604366A patent/NL7604366A/xx not_active Application Discontinuation
- 1976-04-23 ES ES447270A patent/ES447270A1/es not_active Expired
- 1976-04-23 JP JP4565376A patent/JPS51131207A/ja active Pending
- 1976-04-26 CH CH521176A patent/CH600697A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA1019857A (en) | 1977-10-25 |
| DE2617523A1 (de) | 1976-11-04 |
| AU1318876A (en) | 1977-10-27 |
| FR2309090B1 (xx) | 1981-08-07 |
| SE7604096L (sv) | 1976-10-26 |
| US3992591A (en) | 1976-11-16 |
| ES447270A1 (es) | 1977-06-16 |
| AU497830B2 (en) | 1979-01-11 |
| NL7604366A (nl) | 1976-10-27 |
| GB1542148A (en) | 1979-03-14 |
| JPS51131207A (en) | 1976-11-15 |
| BE840907A (fr) | 1976-08-16 |
| FR2309090A1 (fr) | 1976-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |