ES417510A1 - Operating circuit of a telephone set - Google Patents
Operating circuit of a telephone setInfo
- Publication number
- ES417510A1 ES417510A1 ES417510A ES417510A ES417510A1 ES 417510 A1 ES417510 A1 ES 417510A1 ES 417510 A ES417510 A ES 417510A ES 417510 A ES417510 A ES 417510A ES 417510 A1 ES417510 A1 ES 417510A1
- Authority
- ES
- Spain
- Prior art keywords
- contact
- commutator
- circuit
- normally open
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
-
- 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)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
Improvements in the handling circuits of the subscriber apparatuses constituted by a circuit within which a fully electronic control circuit produces, according to the digits entered through a dial pad, the train of dial pulses such as pulses electrical contact of the impulse contact of the disk commutator and like those of the normally open contact of the commutator of the same, characterized in that the input line coming directly from the control unit (a, b) is connected, through the normally open contact of the commutator (HU) from the mobile support to a bridge rectifier (GL), because from the positive output of this to the negative terminal of it is the well-known conversation circuit (SK) made up of the hybrid transformer (GU), the microphone (M), the receiver (F) and the balancing network (LN), a first electronic switch that replaces the impulse contact of the disk switch and a connection Parallel connection composed of a capacitor (c) and a limiting diode (Z1) arranged in series, because in parallel with the conversation circuit there is a second electronic switch that replaces the normally open contact of the disk switch and because as supply voltage (UB) of the control circuit (S) the capacitor voltage is used. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722238225 DE2238225A1 (en) | 1972-08-03 | 1972-08-03 | OPERATING WIRING OF A TELEPHONE SET |
Publications (1)
Publication Number | Publication Date |
---|---|
ES417510A1 true ES417510A1 (en) | 1976-03-01 |
Family
ID=5852576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES417510A Expired ES417510A1 (en) | 1972-08-03 | 1973-08-02 | Operating circuit of a telephone set |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2238225A1 (en) |
ES (1) | ES417510A1 (en) |
FR (1) | FR2195130B1 (en) |
GB (1) | GB1398860A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2291656A1 (en) * | 1974-11-14 | 1976-06-11 | Telic | Telephone numbered keyboard - replaces usual dial and can be installed without other equipment or additional supply |
IT1110111B (en) * | 1979-01-12 | 1985-12-23 | Acet Srl | TWO-WIRE ELECTRIC DOOR ENTRY SYSTEM, SUSCEPTABLE TO USE A PRESSISTING DOOR BELL SYSTEM, WITHOUT THE NEED FOR ADDITIONAL POWER LINES |
DE3408146A1 (en) * | 1984-03-06 | 1985-09-12 | Hagenuk GmbH, 2300 Kiel | Circuit arrangement for a telephone subscriber station |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849539A (en) * | 1956-12-13 | 1958-08-26 | Bell Telephone Labor Inc | Magnetic core circuits |
DE1145233B (en) * | 1960-10-04 | 1963-03-14 | Arnstadt Fernmeldewerk | Power surge transmitters, especially number switches for telephones |
DE1229154B (en) * | 1965-04-30 | 1966-11-24 | Maack Elmewe | Circuit arrangement for charge counters in telephone subscriber stations |
US3488450A (en) * | 1966-12-02 | 1970-01-06 | American Telephone & Telegraph | Sender for transmitting trains of pulses |
CH491562A (en) * | 1969-10-14 | 1970-05-31 | Autophon Ag | Circuit arrangement for telephone subscriber stations with a device for emitting audio frequency dialing signals |
DE2043611A1 (en) * | 1970-09-03 | 1972-03-09 | Tn | Charging circuit for capacitors at the end of a line carrying only low power in telecommunications systems |
BE788732A (en) * | 1971-09-13 | 1973-03-13 | Int Standard Electric Corp | KEYPAD TELEPHONE STATION |
CH537679A (en) * | 1971-10-29 | 1973-05-31 | Sodeco Compteurs De Geneve | Device for feeding additional devices in telephone stations |
-
1972
- 1972-08-03 DE DE19722238225 patent/DE2238225A1/en active Pending
-
1973
- 1973-07-26 FR FR7327354A patent/FR2195130B1/fr not_active Expired
- 1973-07-27 GB GB3583473A patent/GB1398860A/en not_active Expired
- 1973-08-02 ES ES417510A patent/ES417510A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2195130B1 (en) | 1976-11-12 |
DE2238225A1 (en) | 1974-02-14 |
FR2195130A1 (en) | 1974-03-01 |
GB1398860A (en) | 1975-06-26 |
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