GB830464A - Improvements in or relating to selective-calling systems - Google Patents

Improvements in or relating to selective-calling systems

Info

Publication number
GB830464A
GB830464A GB8175/55A GB817555A GB830464A GB 830464 A GB830464 A GB 830464A GB 8175/55 A GB8175/55 A GB 8175/55A GB 817555 A GB817555 A GB 817555A GB 830464 A GB830464 A GB 830464A
Authority
GB
United Kingdom
Prior art keywords
selective
relating
calling systems
calling
systems
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
GB8175/55A
Inventor
Charles Mark Kramskoy
David Arthur Chalmers
John Louis Carroll
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB830464A publication Critical patent/GB830464A/en
Expired 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
GB8175/55A 1957-01-04 1955-03-21 Improvements in or relating to selective-calling systems Expired GB830464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB394/57A GB879644A (en) 1957-01-04 1957-01-04 Improvements in or relating to selective calling systems

Publications (1)

Publication Number Publication Date
GB830464A true GB830464A (en) 1960-03-16

Family

ID=9703616

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8175/55A Expired GB830464A (en) 1957-01-04 1955-03-21 Improvements in or relating to selective-calling systems
GB394/57A Expired GB879644A (en) 1957-01-04 1957-01-04 Improvements in or relating to selective calling systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB394/57A Expired GB879644A (en) 1957-01-04 1957-01-04 Improvements in or relating to selective calling systems

Country Status (1)

Country Link
GB (2) GB830464A (en)

Also Published As

Publication number Publication date
GB879644A (en) 1961-10-11

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