GB630815A - - Google Patents

Info

Publication number
GB630815A
GB630815A GB630815DA GB630815A GB 630815 A GB630815 A GB 630815A GB 630815D A GB630815D A GB 630815DA GB 630815 A GB630815 A GB 630815A
Authority
GB
United Kingdom
Prior art keywords
relay
lamp
circuit
contacts
call
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.)
Active
Application number
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.)
Publication of GB630815A publication Critical patent/GB630815A/en
Priority claimed from US697670A external-priority patent/US2485580A/en
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • 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)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

630,815. Radio signalling. STANDARD TELEPHONES & CABLES, Ltd. Aug. 8, 1947, No. 21927. Convention date, Sept. 18, 1946. [Class 40 (v)] A system for selectively calling any one of a number of receiving stations comprises a call indicating circuit at the receiving station, a control circuit responsive to a station selector signal to prepare the call indicating circuit for operation and means responsive to a further signal to energize the call indicating circuit. The station selector system comprises as described in Specification 630,819 tuned reeds 11, 12, 13 successively operated to bias and render inoperative a normally oscillating gaseous tube 24 so that the contacts 31, 30 of a normally energized relay 29 fall back and respectively apply H.T. to the output valve of the receiver and a holding bias to the tube 24 as long as a carrier wave is transmitted. On a further modulation frequency being received a further tuned reed 54 is vibrated to energize from battery B a second relay 46, closing contacts 47, 48, 49, so that a bell 44 and lamp 45 are both energized during a calling signal. After the carrier wave ceases the relay contacts 30, 31 drop back and the bell stops but relay 46 remains energized due to a holding circuit through the telephone hook switch 61, 62, contact 49, the relay coil 46, and lamp 45 which remains lit to register that a call has been made. On the telephone being lifted the holding circuit is broken and the relay and lamp deenergized.
GB630815D 1946-09-18 Active GB630815A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US697670A US2485580A (en) 1946-09-18 1946-09-18 Signaling system

Publications (1)

Publication Number Publication Date
GB630815A true GB630815A (en)

Family

ID=24802059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB630815D Active GB630815A (en) 1946-09-18

Country Status (2)

Country Link
ES (1) ES181845A1 (en)
GB (1) GB630815A (en)

Also Published As

Publication number Publication date
ES181845A1 (en) 1948-03-01

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