GB1306860A - Radio-telephone systems - Google Patents

Radio-telephone systems

Info

Publication number
GB1306860A
GB1306860A GB1306860DA GB1306860A GB 1306860 A GB1306860 A GB 1306860A GB 1306860D A GB1306860D A GB 1306860DA GB 1306860 A GB1306860 A GB 1306860A
Authority
GB
United Kingdom
Prior art keywords
calling
exchange
signals
calling signals
oscillators
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
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1306860A publication Critical patent/GB1306860A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks

Abstract

1306860 Radio signalling LICENTIAPATENT - VERWALTUNGS GmbH 9 June 1970 [3 July 1969] 27772/70 Heading H4L In a radio communication system the subscriber's stations include relatively unstable oscillators for generating calling signals consisting of combinations of frequencies and an exchange comprises means for receiving said calling signals, converting them into frequencystable calling signals and transmitting the converted signals to the called subscriber's station. This enables simple and compact low-frequency oscillators to be used in, for example, pocket transmitter-receivers. At the exchange the received calling signals are selected by filters and may be rectified to provide voltages switching on stable oscillators for the new calling signals. Subscribers without selective calling means may communicate with other subscribers via the exchange, the appropriate calling signal being set up and sent out at the exchange.
GB1306860D 1969-06-20 1970-06-05 Radio-telephone systems Expired GB1306860A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19691931480 DE1931480B2 (en) 1969-06-20 1969-06-20 CIRCUIT FOR PRESELECTION OF EQUAL FREQUENCY DISTANCED TRANSMITTERS
DE19691933700 DE1933700C3 (en) 1969-06-20 1969-07-03 Two-way radio with wireless transmission

Publications (1)

Publication Number Publication Date
GB1306860A true GB1306860A (en) 1973-02-14

Family

ID=25757530

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2777270A Expired GB1306859A (en) 1969-06-20 1970-06-05 Communication receivers
GB1306860D Expired GB1306860A (en) 1969-06-20 1970-06-05 Radio-telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB2777270A Expired GB1306859A (en) 1969-06-20 1970-06-05 Communication receivers

Country Status (7)

Country Link
AT (1) AT298563B (en)
BE (1) BE751974A (en)
CH (1) CH505509A (en)
DE (2) DE1931480B2 (en)
FR (1) FR2052787A5 (en)
GB (2) GB1306859A (en)
NL (1) NL7007981A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738278C2 (en) * 1977-08-25 1982-06-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Radio system with wireless transmission between portable transceiver devices and with selective calls between the participants with the interposition of a control center

Also Published As

Publication number Publication date
GB1306859A (en) 1973-02-14
BE751974A (en) 1970-11-16
AT298563B (en) 1972-05-10
DE1931480A1 (en) 1971-01-14
DE1933700B2 (en) 1973-05-10
FR2052787A5 (en) 1971-04-09
DE1933700A1 (en) 1971-01-14
NL7007981A (en) 1970-12-22
CH505509A (en) 1971-03-31
DE1933700C3 (en) 1973-11-22
DE1931480B2 (en) 1976-03-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee