BE559143A - - Google Patents
Info
- Publication number
- BE559143A BE559143A BE559143DA BE559143A BE 559143 A BE559143 A BE 559143A BE 559143D A BE559143D A BE 559143DA BE 559143 A BE559143 A BE 559143A
- Authority
- BE
- Belgium
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
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- 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
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST11464A DE1023794B (de) | 1956-07-26 | 1956-07-26 | Schaltungsanordnung zur UEbertragung von eine Verbindungsherstellung veranlassenden Signalkennzeichen von einer in der Teilnehmerstation befindlichen Sende- zu einer in der Vermittlungsstelle befindlichen Empfangseinrichtung nach der Vergleichsmethode in Fernmelde-, insbesondere Fernsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE559143A true BE559143A (pt) |
Family
ID=7455404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE559143D BE559143A (pt) | 1956-07-26 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2999227A (pt) |
| BE (1) | BE559143A (pt) |
| CH (1) | CH353770A (pt) |
| DE (1) | DE1023794B (pt) |
| FR (1) | FR1182387A (pt) |
| GB (1) | GB863584A (pt) |
| NL (1) | NL104430C (pt) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3210637A (en) * | 1961-12-20 | 1965-10-05 | Varo | Direct current power supply circuit |
| BE633916A (pt) * | 1962-06-25 | |||
| US3244942A (en) * | 1962-07-16 | 1966-04-05 | Clare & Co C P | Bistable relay circuit |
| GB1159251A (en) * | 1965-07-29 | 1969-07-23 | Post Office | Improvements in or relating to Signalling Systems |
| US3448448A (en) * | 1965-11-19 | 1969-06-03 | Edwards Co | Supervised alarm circuits |
| US4202611A (en) * | 1979-01-08 | 1980-05-13 | Bell & Howell Company | Projector apparatus and control arrangement |
| US5014051A (en) * | 1989-12-26 | 1991-05-07 | Delco Electronics Corporation | Increased resolution sensor circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512639A (en) * | 1944-01-05 | 1950-06-27 | Int Standard Electric Corp | Control or signaling system |
| US2810072A (en) * | 1951-08-04 | 1957-10-15 | Joseph Greenspan | Multistable networks |
| US2813262A (en) * | 1952-12-12 | 1957-11-12 | Asea Ab | Electric selector device |
| US2854651A (en) * | 1953-06-30 | 1958-09-30 | Bell Telephone Labor Inc | Diode circuits |
| DE967287C (de) * | 1954-04-05 | 1957-10-31 | Siemens Ag | Schaltungsanordnung zur Tastaturwahl bei Fernmeldeanlagen, insbesondere Fernsprechanlagen |
| US2829282A (en) * | 1956-05-17 | 1958-04-01 | Itt | Pulse generator |
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0
- NL NL104430D patent/NL104430C/xx active
- BE BE559143D patent/BE559143A/xx unknown
-
1956
- 1956-07-26 DE DEST11464A patent/DE1023794B/de active Pending
-
1957
- 1957-07-06 CH CH353770D patent/CH353770A/de unknown
- 1957-07-19 GB GB22925/57A patent/GB863584A/en not_active Expired
- 1957-07-24 US US673970A patent/US2999227A/en not_active Expired - Lifetime
- 1957-07-25 FR FR1182387D patent/FR1182387A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1182387A (fr) | 1959-06-24 |
| CH353770A (de) | 1961-04-30 |
| GB863584A (en) | 1961-03-22 |
| NL104430C (pt) | |
| DE1023794B (de) | 1958-02-06 |
| US2999227A (en) | 1961-09-05 |