CH600721A5 - - Google Patents
Info
- Publication number
- CH600721A5 CH600721A5 CH360576A CH360576A CH600721A5 CH 600721 A5 CH600721 A5 CH 600721A5 CH 360576 A CH360576 A CH 360576A CH 360576 A CH360576 A CH 360576A CH 600721 A5 CH600721 A5 CH 600721A5
- Authority
- CH
- Switzerland
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
- Manipulation Of Pulses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12370/75A GB1479094A (en) | 1975-03-25 | 1975-03-25 | Ring trip detectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH600721A5 true CH600721A5 (pl) | 1978-06-30 |
Family
ID=10003299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH360576A CH600721A5 (pl) | 1975-03-25 | 1977-05-18 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4022980A (pl) |
| AU (1) | AU502746B2 (pl) |
| BE (1) | BE839982R (pl) |
| BR (1) | BR7601802A (pl) |
| CH (1) | CH600721A5 (pl) |
| ES (1) | ES446362A1 (pl) |
| FR (1) | FR2305900A1 (pl) |
| GB (1) | GB1479094A (pl) |
| NO (1) | NO761023L (pl) |
| ZA (1) | ZA76196B (pl) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7700719A (nl) * | 1977-01-25 | 1978-07-27 | Philips Nv | Storingsongevoelig lijnsupervisiecircuit. |
| US4104488A (en) * | 1977-05-19 | 1978-08-01 | International Standard Electric Corporation | Subscriber line circuit |
| US4447673A (en) * | 1977-12-27 | 1984-05-08 | Stromberg-Carlson Corporation | Ring trip apparatus for a line circuit connected to DCO switch |
| GB2013000A (en) * | 1978-01-20 | 1979-08-01 | Hitachi Ltd Dc | D.C. magnetic field cancellation circuit |
| US4455456A (en) * | 1982-04-26 | 1984-06-19 | International Telephone And Telegraph Corporation | Digital supervisory circuit for a telephone system |
| US4524245A (en) * | 1983-01-13 | 1985-06-18 | Redcom Laboratories Inc. | Ring trip detection system |
| GB2146872B (en) * | 1983-09-15 | 1986-11-05 | Stc Plc | Hall effect module for loop detector |
| CA1240085A (en) * | 1984-05-30 | 1988-08-02 | Kenji Takato | Calling signal transmission apparatus |
| JPH0726978B2 (ja) * | 1988-09-22 | 1995-03-29 | 東洋通信機株式会社 | 電流センサ回路 |
| IT1248549B (it) * | 1991-06-25 | 1995-01-19 | Sgs Thomson Microelectronics | Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numerodi componenti ridotto. |
| JP2564743Y2 (ja) * | 1991-07-01 | 1998-03-09 | 株式会社村田製作所 | 電話回線用センサユニット |
| US6348752B1 (en) * | 1992-04-06 | 2002-02-19 | General Electric Company | Integral motor and control |
| US5479499A (en) * | 1993-12-15 | 1995-12-26 | Murata Manufacturing Co., Ltd. | Sensor circuit for voice/fax switch with cascaded amplifier circuit |
| US5982122A (en) * | 1996-12-05 | 1999-11-09 | General Electric Company | Capacitively powered motor and constant speed control therefor |
| US6289100B1 (en) | 1999-03-09 | 2001-09-11 | Hubbell Incorporated | Communications station having hall effect device for controlling hookswitch operations |
| JP2019083622A (ja) * | 2017-10-30 | 2019-05-30 | 日本電産株式会社 | 駆動回路 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1158584B (de) * | 1962-08-16 | 1963-12-05 | Telefunken Patent | Schaltungsanordnung zur Pruefung des Anruf- und Belegungszustandes der Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen mit Hilfe von Hall-Generatoren |
| US3848094A (en) * | 1972-12-29 | 1974-11-12 | Stromberg Carlson Corp | Telephone battery feed circuit |
| NL7301486A (pl) * | 1973-02-01 | 1974-08-05 | ||
| US3899644A (en) * | 1974-06-19 | 1975-08-12 | Data Time | AC/DC-monitoring telephone line ringing voltage detector |
-
1975
- 1975-03-25 GB GB12370/75A patent/GB1479094A/en not_active Expired
-
1976
- 1976-01-14 ZA ZA760196A patent/ZA76196B/xx unknown
- 1976-03-03 US US05/663,396 patent/US4022980A/en not_active Expired - Lifetime
- 1976-03-11 AU AU11861/76A patent/AU502746B2/en not_active Expired
- 1976-03-24 NO NO761023A patent/NO761023L/no unknown
- 1976-03-24 BR BR7601802A patent/BR7601802A/pt unknown
- 1976-03-25 ES ES446362A patent/ES446362A1/es not_active Expired
- 1976-03-25 BE BE2054900A patent/BE839982R/xx active
- 1976-03-25 FR FR7608711A patent/FR2305900A1/fr not_active Withdrawn
-
1977
- 1977-05-18 CH CH360576A patent/CH600721A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB1479094A (en) | 1977-07-06 |
| NO761023L (pl) | 1976-09-28 |
| ZA76196B (en) | 1977-02-23 |
| ES446362A1 (es) | 1977-10-01 |
| FR2305900A1 (fr) | 1976-10-22 |
| BE839982R (nl) | 1976-09-27 |
| AU502746B2 (en) | 1979-08-09 |
| US4022980A (en) | 1977-05-10 |
| AU1186176A (en) | 1977-09-15 |
| BR7601802A (pt) | 1976-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |