GB157305A - Improvements relating to circuit arrangements for stations provided with transmitters and superposed receivers for high frequency cable telegraphy - Google Patents

Improvements relating to circuit arrangements for stations provided with transmitters and superposed receivers for high frequency cable telegraphy

Info

Publication number
GB157305A
GB157305A GB1216/21A GB121621A GB157305A GB 157305 A GB157305 A GB 157305A GB 1216/21 A GB1216/21 A GB 1216/21A GB 121621 A GB121621 A GB 121621A GB 157305 A GB157305 A GB 157305A
Authority
GB
United Kingdom
Prior art keywords
oscillations
transmitter
receiver
receiving
key
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
GB1216/21A
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.)
DEUTSCHE TELEPHONWERKE GmbH
Original Assignee
DEUTSCHE TELEPHONWERKE 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 DEUTSCHE TELEPHONWERKE GmbH filed Critical DEUTSCHE TELEPHONWERKE GmbH
Publication of GB157305A publication Critical patent/GB157305A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transmitters (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

157,305. Deutsche Telephonwerke Ges. Sept. 25, 1918, CConvention date]. Void [Published under Sect. 91 of the Act]. Wired wireless systems; combined transmitting and receiving arrangements; heterodyne receiving systems.-The transmitter is connected to the receiver at the same station in order that the former may serve directly as a generator of the local oscillations for heterodyne receiving. The coil 6 in which oscillations are generated by the transmitter 1 for transmission over the line wires is connected in series with a coil 9 coupled to the tuned circuit 10, 11 of the receiver 8. When transmitting, the key 7 in the heating circuit for the filament of the receiver is open, and when receiving this key and the transmitting-key 5 are closed so that oscillations generated by the transmitter 1, which can be varied by the variable self inductance 3, are superimposed on the incoming oscillations.
GB1216/21A 1918-09-25 1921-01-10 Improvements relating to circuit arrangements for stations provided with transmitters and superposed receivers for high frequency cable telegraphy Expired GB157305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157305X 1918-09-25

Publications (1)

Publication Number Publication Date
GB157305A true GB157305A (en) 1922-01-19

Family

ID=5678554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1216/21A Expired GB157305A (en) 1918-09-25 1921-01-10 Improvements relating to circuit arrangements for stations provided with transmitters and superposed receivers for high frequency cable telegraphy

Country Status (3)

Country Link
DE (1) DE312590C (en)
GB (1) GB157305A (en)
NL (1) NL10716C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL63030C (en) * 1943-09-10

Also Published As

Publication number Publication date
NL10716C (en)
DE312590C (en)

Similar Documents

Publication Publication Date Title
GB454831A (en) Improvements in or relating to high frequency signalling apparatus
GB539105A (en) Improvements in carrier frequency relay communication systems
US1744036A (en) Process for radiotelegraphic or radiotelephonic communication
US2024138A (en) Radio signaling system
GB157305A (en) Improvements relating to circuit arrangements for stations provided with transmitters and superposed receivers for high frequency cable telegraphy
GB628862A (en) Improvements in transmitting-receiving circuits for short waves
US1931656A (en) Control apparatus
US1650250A (en) Two-way circuit arrangement for wireless telephony
US1528032A (en) Selective signaling system
US1496155A (en) Art of radiocommunication
US1739455A (en) Method for transmitting the speech by high-frequency waves
US1682664A (en) Radio transmission receiving system
US1621062A (en) Radio system
US1531029A (en) Radio transmission system
US1558231A (en) Multiplex telegraphy
US1609748A (en) Radiotelephone transmitting system
US1406442A (en) Radio receiving system
US1537099A (en) Carrier-current system
US1696212A (en) Selective-translation system
Conrad Short-wave radio broadcasting
US1009106A (en) Receiving apparatus.
US1598227A (en) Cut-in system of radiotelegraphy
GB142886A (en) Improvements in or relating to wireless signalling apparatus
US1454495A (en) System of current-wave transmission
GB103771A (en) Improvements in Duplex and Multiplex Telegraphy.