NL257471A - - Google Patents
Info
- Publication number
- NL257471A NL257471A NL257471DA NL257471A NL 257471 A NL257471 A NL 257471A NL 257471D A NL257471D A NL 257471DA NL 257471 A NL257471 A NL 257471A
- Authority
- NL
- Netherlands
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
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
-
- 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US859936A US3064084A (en) | 1959-12-16 | 1959-12-16 | Telephone substation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL257471A true NL257471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1900-01-01 |
Family
ID=25332106
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL257471D NL257471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1959-12-16 | ||
| NL60257471A NL138794B (nl) | 1959-12-16 | 1960-11-01 | Abonneetelefoontoestel met een generator voor het opwekken van wisselstroomkiessignalen. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL60257471A NL138794B (nl) | 1959-12-16 | 1960-11-01 | Abonneetelefoontoestel met een generator voor het opwekken van wisselstroomkiessignalen. |
Country Status (8)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2505955A1 (de) * | 1974-02-26 | 1975-08-28 | Philips Nv | Schaltung fuer einen tondrucktastenwahlfernsprecher |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3288932A (en) * | 1963-04-24 | 1966-11-29 | Automatic Elect Lab | Voice-data substation apparatus actuated by tone from central switching office |
| DE1185665B (de) * | 1963-09-14 | 1965-01-21 | Standard Elektrik Lorenz Ag | Tastengesteuerter Mehrfrequenz-Tongenerator |
| US3284577A (en) * | 1963-10-10 | 1966-11-08 | Substation apparatus employing a multi- frequency signaling arrangement | |
| DE1194912B (de) * | 1963-12-30 | 1965-06-16 | Siemens Ag | Schwingungserzeuger fuer die Tastaturwahl in Fernsprechvermittlungsanlagen |
| US3447096A (en) * | 1965-08-17 | 1969-05-27 | Bell Telephone Labor Inc | Multifrequency signal generator |
| DE1907921B1 (de) * | 1969-02-17 | 1970-06-25 | Siemens Ag | Tastenanordnung fuer Teilnehmerstellen in Fernmelde-,insbesondere Fernsprechanlagen,mit einem kontaktlosen Schalter |
| US3745261A (en) * | 1971-09-20 | 1973-07-10 | Bell Telephone Labor Inc | Telephone set speech network |
| CA947444A (en) * | 1972-04-17 | 1974-05-14 | Bell Canada | Telephone substation apparatus |
| US3899638A (en) * | 1973-10-29 | 1975-08-12 | Interface Technology Inc | Portable tone data transmitter |
| US3970801A (en) * | 1974-12-03 | 1976-07-20 | Motorola, Inc. | Dialing apparatus for a portable radio telephone |
| US4315108A (en) * | 1975-09-29 | 1982-02-09 | Mostek Corporation | Integrated circuit chip telephone communication system |
| US4314107A (en) * | 1979-12-26 | 1982-02-02 | United Networks, Inc. | Subscriber station networks |
| WO2007064960A2 (en) * | 2005-11-30 | 2007-06-07 | University Of South Florida | Mov failure mode identification |
| JP5509688B2 (ja) * | 2008-06-19 | 2014-06-04 | 三菱瓦斯化学株式会社 | 触媒及びこれを用いたカルボン酸又はカルボン酸無水物の製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE539848A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1954-07-16 | |||
| BE559221A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1956-07-26 | |||
| US2846512A (en) * | 1956-12-31 | 1958-08-05 | Bell Telephone Labor Inc | Party line station identifying impulse transmitter |
-
0
- NL NL257471D patent/NL257471A/xx unknown
- US US25507D patent/USRE25507E/en not_active Expired
-
1959
- 1959-12-16 US US859936A patent/US3064084A/en not_active Expired - Lifetime
-
1960
- 1960-10-13 DE DEW28720A patent/DE1141343B/de active Pending
- 1960-10-24 FR FR842043A patent/FR1275106A/fr not_active Expired
- 1960-11-01 NL NL60257471A patent/NL138794B/xx unknown
- 1960-11-09 JP JP4429960A patent/JPS3712210B1/ja active Pending
- 1960-12-01 GB GB41337/60A patent/GB964335A/en not_active Expired
- 1960-12-05 BE BE597790A patent/BE597790A/fr unknown
- 1960-12-13 ES ES0263736A patent/ES263736A1/es not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2505955A1 (de) * | 1974-02-26 | 1975-08-28 | Philips Nv | Schaltung fuer einen tondrucktastenwahlfernsprecher |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1141343B (de) | 1962-12-20 |
| US3064084A (en) | 1962-11-13 |
| USRE25507E (en) | 1964-01-07 |
| FR1275106A (fr) | 1961-11-03 |
| JPS3712210B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1962-08-28 |
| NL138794B (nl) | 1973-05-15 |
| ES263736A1 (es) | 1961-03-16 |
| GB964335A (en) | 1964-07-22 |
| BE597790A (fr) | 1961-03-31 |