GB147320A - Improvements in electromagnetic wave signalling systems - Google Patents

Improvements in electromagnetic wave signalling systems

Info

Publication number
GB147320A
GB147320A GB1313519A GB1313519A GB147320A GB 147320 A GB147320 A GB 147320A GB 1313519 A GB1313519 A GB 1313519A GB 1313519 A GB1313519 A GB 1313519A GB 147320 A GB147320 A GB 147320A
Authority
GB
United Kingdom
Prior art keywords
grid
plate
filament
key
negative side
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
GB1313519A
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
Application filed by Individual filed Critical Individual
Priority to GB1313519A priority Critical patent/GB147320A/en
Publication of GB147320A publication Critical patent/GB147320A/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)

Abstract

147,320. Lea, N., and Ree, J. May 24, 1919. Wireless telegraphy; electric oscillations, producing.-In a transmitting system employing a thermionic oscillation generator, signals are produced by a Morse key, interrupter, or both, placed between the filament and the negative side of the plate battery. The oscillatory circuit 7, 8 is connected on the one hand to the plate 6 and on the other hand through a condenser 9 to the filament 2. The high-tension supply is connected on its negative side 3 to the filament 2 through the key &c. 1, and on its positive side 10 to the plate 6 through the inductance 7. The negative side is also connected directly to the grid 5 through the grid inductance 4. When the key 1 is opened, the voltage appearing across its contacts, instead of causing arcing, increases the mean negative potential of the grid and reduces the plate current. The mean negative potential of the grid may be maintained by a battery in the grid circuit, or by a condenser and grid leak.
GB1313519A 1919-05-24 1919-05-24 Improvements in electromagnetic wave signalling systems Expired GB147320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1313519A GB147320A (en) 1919-05-24 1919-05-24 Improvements in electromagnetic wave signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1313519A GB147320A (en) 1919-05-24 1919-05-24 Improvements in electromagnetic wave signalling systems

Publications (1)

Publication Number Publication Date
GB147320A true GB147320A (en) 1920-07-22

Family

ID=10017451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1313519A Expired GB147320A (en) 1919-05-24 1919-05-24 Improvements in electromagnetic wave signalling systems

Country Status (1)

Country Link
GB (1) GB147320A (en)

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