GB177267A - Improvements in wireless transmitting apparatus - Google Patents

Improvements in wireless transmitting apparatus

Info

Publication number
GB177267A
GB177267A GB3623320A GB3623320A GB177267A GB 177267 A GB177267 A GB 177267A GB 3623320 A GB3623320 A GB 3623320A GB 3623320 A GB3623320 A GB 3623320A GB 177267 A GB177267 A GB 177267A
Authority
GB
United Kingdom
Prior art keywords
aerial
switch
coil
short
transmitting apparatus
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
GB3623320A
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.)
Individual
Original Assignee
Individual
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
Priority to NL11936D priority Critical patent/NL11936C/xx
Application filed by Individual filed Critical Individual
Priority to GB3623320A priority patent/GB177267A/en
Priority to FR541404D priority patent/FR541404A/en
Publication of GB177267A publication Critical patent/GB177267A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

177,267. Marconi's Wireless Telegraph Co., Ltd., (Davis, N. E.). Dec. 24, 1920. Keying systems and apparatus.-An oscillatory circuit of a wireless transmitter is coupled to the aerial A by two opposed coils B, C which normally produce no effect in the aerial. Signalling is effected by closing a switch E which short-circuits one of the coils C and thus permits the coil B to energize the aerial. The circuit B, C, D may be set in oscillation by a valve generator or other means. To avoid sparking the inductance of the coil C should be small, and the switch leads should be short and of low impedance. A light relay may operate the switch E.
GB3623320A 1920-12-24 1920-12-24 Improvements in wireless transmitting apparatus Expired GB177267A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL11936D NL11936C (en) 1920-12-24
GB3623320A GB177267A (en) 1920-12-24 1920-12-24 Improvements in wireless transmitting apparatus
FR541404D FR541404A (en) 1920-12-24 1921-09-22 Improvements to transmitting devices for wireless telegraphy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3623320A GB177267A (en) 1920-12-24 1920-12-24 Improvements in wireless transmitting apparatus

Publications (1)

Publication Number Publication Date
GB177267A true GB177267A (en) 1922-03-24

Family

ID=10386203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3623320A Expired GB177267A (en) 1920-12-24 1920-12-24 Improvements in wireless transmitting apparatus

Country Status (3)

Country Link
FR (1) FR541404A (en)
GB (1) GB177267A (en)
NL (1) NL11936C (en)

Also Published As

Publication number Publication date
FR541404A (en) 1922-07-27
NL11936C (en)

Similar Documents

Publication Publication Date Title
GB177267A (en) Improvements in wireless transmitting apparatus
GB256828A (en) Improvements in or relating to wireless telegraphy and telephony
US2022049A (en) Signaling apparatus
GB446804A (en) Improvements in or relating to oscillatory circuit arrangements
US1425523A (en) Transmission system for radiant energy
GB277353A (en) Improvements in radio communication
GB253096A (en) Improvements in phonograph adjunct for radio sets
US1454598A (en) Wireless transmitter
GB162761A (en) Improvements in wireless transmitters
US1571373A (en) Wireless transmitting apparatus
SU16747A1 (en) Intermediate hearing and monitoring device for wireless telegraphy
GB163117A (en) Improvements in and relating to wireless telegraphy and telephony
US1320140A (en) Wireless transmission of signals
GB162762A (en) Improvements in wireless transmitters
GB187457A (en) Improvements in or relating to thermionic valve transmitters for wireless signalling
GB202427A (en) Improvements in or relating to electro-magnetically controlled switching apparatus
GB192133A (en) Improvements in and relating to radio signalling systems
GB205878A (en) A method of and means for signalling or modulating by grid potential control in thermionic valve circuits for wireless telegraphy or telephony
GB121144A (en) Improvements in or relating to Apparatus for the Reception and Utilization of Electric Current Impulses and suitable for Wireless or other Telegraphy and Telephony.
GB204053A (en) Improvements relating to the wireless transmission of morse code signals
GB511359A (en) Improvements in and relating to electric signalling apparatus
GB417725A (en) Improvements in or relating to wireless signalling
GB403740A (en) Improvements in or relating to tuning arrangements for use in radio reception and transmission
GB284361A (en) Improvements in and relating to electric signalling systems
GB178971A (en) Improvements in or relating to high frequency electrical apparatus