NL225553A - - Google Patents
Info
- Publication number
- NL225553A NL225553A NL225553DA NL225553A NL 225553 A NL225553 A NL 225553A NL 225553D A NL225553D A NL 225553DA NL 225553 A NL225553 A NL 225553A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE361033X | 1957-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL225553A true NL225553A (xx) |
Family
ID=20308921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL225553D NL225553A (xx) | 1957-09-17 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3027428A (xx) |
| BE (1) | BE565493A (xx) |
| CH (1) | CH361033A (xx) |
| DE (1) | DE1102816B (xx) |
| FR (1) | FR1199271A (xx) |
| GB (1) | GB830818A (xx) |
| NL (1) | NL225553A (xx) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL259106A (xx) * | 1959-12-18 | |||
| DE1155171B (de) * | 1961-03-25 | 1963-10-03 | Standard Elektrik Lorenz Ag | Schaltungsanordnung fuer die Pegelregelung bei Fernsprechstationen mit Sprech- und/oder Hoerverstaerkern |
| US3531594A (en) * | 1968-08-05 | 1970-09-29 | Nathaniel Dickerson | Two-wire multiunit intercom system |
| US3784755A (en) * | 1971-09-07 | 1974-01-08 | Bell Canada Northern Electric | Long-line telephone circuit |
| CH654705A5 (de) * | 1982-04-27 | 1986-02-28 | Autelca Ag | Schaltungsanordnung fuer einen muenzfernsprecher. |
| US4488006A (en) * | 1982-07-01 | 1984-12-11 | At&T Bell Laboratories | Apparatus for controlling the application of telephone line power in a telephone set |
| FR2533097A1 (fr) * | 1982-09-13 | 1984-03-16 | Gesi | Controleur de ligne telephonique destine a cooperer avec un automate |
| GB2142509A (en) * | 1983-06-28 | 1985-01-16 | Emhart Ind | Audio amplifier |
| FR2557396A1 (fr) * | 1983-11-15 | 1985-06-28 | Gesi | Alimentation a haute impedance pour circuit electronique alimente par une ligne de telephone |
| CA1285494C (en) * | 1987-07-10 | 1991-07-02 | Newbridge Networks Corporation | Paging system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE678081C (de) * | 1932-05-15 | 1939-07-08 | Westinghouse Cooper Hewitt Ges | Anordnung zur Aufrechterhaltung der Spannung in Gleichrichterschaltungen |
| DE683580C (de) * | 1936-10-29 | 1939-11-09 | Siemens & Halske Akt Ges | Batterielose, netzgespeiste Stromversorgungseinrichtung |
| DE887222C (de) * | 1945-02-01 | 1953-08-20 | Aeg | Verfahren zur Stromversorgung fuer Verstaerkereinrichtungen bei Fernsprechstellen |
| US2785231A (en) * | 1954-02-25 | 1957-03-12 | Bell Telephone Labor Inc | Telephone set with amplifier |
| US2801288A (en) * | 1956-03-29 | 1957-07-30 | Bell Telephone Labor Inc | Equalizing circuit |
-
0
- NL NL225553D patent/NL225553A/xx unknown
- BE BE565493D patent/BE565493A/xx unknown
-
1957
- 1957-12-26 US US705359A patent/US3027428A/en not_active Expired - Lifetime
- 1957-12-28 FR FR1199271D patent/FR1199271A/fr not_active Expired
- 1957-12-30 GB GB40335/57A patent/GB830818A/en not_active Expired
-
1958
- 1958-01-27 DE DES56736A patent/DE1102816B/de active Pending
- 1958-03-08 CH CH361033D patent/CH361033A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB830818A (en) | 1960-03-23 |
| CH361033A (de) | 1962-03-31 |
| BE565493A (xx) | |
| US3027428A (en) | 1962-03-27 |
| FR1199271A (fr) | 1959-12-11 |
| DE1102816B (de) | 1961-03-23 |