GB295572A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB295572A
GB295572A GB8847/28A GB884728A GB295572A GB 295572 A GB295572 A GB 295572A GB 8847/28 A GB8847/28 A GB 8847/28A GB 884728 A GB884728 A GB 884728A GB 295572 A GB295572 A GB 295572A
Authority
GB
United Kingdom
Prior art keywords
relay
supply
battery
charging
energized
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
Application number
GB8847/28A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB295572A publication Critical patent/GB295572A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
GB8847/28A 1927-08-13 1928-03-23 Improvements in or relating to telephone systems Expired GB295572A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE301844X 1927-08-13

Publications (1)

Publication Number Publication Date
GB295572A true GB295572A (en) 1929-06-24

Family

ID=3867437

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8847/28A Expired GB295572A (en) 1927-08-13 1928-03-23 Improvements in or relating to telephone systems
GB36044/28A Expired GB301844A (en) 1927-08-13 1928-03-23 Improvements in or relating to telephone systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB36044/28A Expired GB301844A (en) 1927-08-13 1928-03-23 Improvements in or relating to telephone systems

Country Status (2)

Country Link
FR (1) FR668098A (pt)
GB (2) GB295572A (pt)

Also Published As

Publication number Publication date
FR668098A (pt) 1929-11-07
GB301844A (en) 1929-06-20

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