FR694634A - Improvements to electric selectors - Google Patents
Improvements to electric selectorsInfo
- Publication number
- FR694634A FR694634A FR694634DA FR694634A FR 694634 A FR694634 A FR 694634A FR 694634D A FR694634D A FR 694634DA FR 694634 A FR694634 A FR 694634A
- Authority
- FR
- France
- Prior art keywords
- electric selectors
- selectors
- electric
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/24—Apparatus or circuits at the receiving end
- H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB36606/30A GB366644A (en) | 1930-12-04 | 1930-12-04 | Improvements relating to electric selectors |
Publications (1)
Publication Number | Publication Date |
---|---|
FR694634A true FR694634A (en) | 1930-12-05 |
Family
ID=10389654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR694634D Expired FR694634A (en) | 1930-12-04 | 1930-04-28 | Improvements to electric selectors |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR694634A (en) |
GB (4) | GB334205A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE972799C (en) * | 1937-11-24 | 1959-09-24 | Siemens Ag | Relay arrangement |
US2436787A (en) * | 1942-06-05 | 1948-03-02 | Standard Telephones Cables Ltd | Arrangement for producing electric impulses |
-
1929
- 1929-04-29 GB GB13229/29A patent/GB334205A/en not_active Expired
- 1929-04-29 GB GB20312/30A patent/GB334516A/en not_active Expired
-
1930
- 1930-04-28 FR FR694634D patent/FR694634A/en not_active Expired
- 1930-12-04 GB GB36606/30A patent/GB366644A/en not_active Expired
-
1931
- 1931-02-17 GB GB4995/31A patent/GB372435A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB366644A (en) | 1932-02-11 |
GB372435A (en) | 1932-05-12 |
GB334516A (en) | 1930-08-29 |
GB334205A (en) | 1930-08-29 |
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