GB285357A - Improvements in telegraphic transmitters - Google Patents

Improvements in telegraphic transmitters

Info

Publication number
GB285357A
GB285357A GB4539/28A GB453928A GB285357A GB 285357 A GB285357 A GB 285357A GB 4539/28 A GB4539/28 A GB 4539/28A GB 453928 A GB453928 A GB 453928A GB 285357 A GB285357 A GB 285357A
Authority
GB
United Kingdom
Prior art keywords
smoothing circuit
supplied
keying
anode
anode current
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
GB4539/28A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB285357A publication Critical patent/GB285357A/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

Abstract

285,357. British Thomson-Houston Co., Ltd., (Assignees of Engstrom, E. W.). Feb. 11, 1927, [Convention date]. Keying systems.-In a telegraphic transmitter embodying a thermionic valve oscillator 1 the anode current for which is supplied through a smoothing circuit 11, means is provided to prevent transient oscillations in the smoothing circuit due to rapid changes of anode impedance caused by keying at 6. For this purpose, an inductance 14 for eliminating surge currents and comprising a coil or low inductance wound on a core of lowreluctance is connected between the smoothing circuit and the valve. The anode current is supplied from an alternating-current source 7 with Associated rectifying means 9, 10.
GB4539/28A 1927-02-11 1928-02-13 Improvements in telegraphic transmitters Expired GB285357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US167568A US1674505A (en) 1927-02-11 1927-02-11 Telegraphic transmitter

Publications (1)

Publication Number Publication Date
GB285357A true GB285357A (en) 1928-06-21

Family

ID=22607889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4539/28A Expired GB285357A (en) 1927-02-11 1928-02-13 Improvements in telegraphic transmitters

Country Status (5)

Country Link
US (1) US1674505A (en)
DE (1) DE476062C (en)
FR (1) FR649493A (en)
GB (1) GB285357A (en)
NL (1) NL23503C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780705A (en) * 1954-11-19 1957-02-05 Resdel Engineering Corp Dielectric heater

Also Published As

Publication number Publication date
DE476062C (en) 1929-05-11
NL23503C (en)
US1674505A (en) 1928-06-19
FR649493A (en) 1928-12-22

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