GB386743A - Improvements in telegraphy and like signalling systems - Google Patents

Improvements in telegraphy and like signalling systems

Info

Publication number
GB386743A
GB386743A GB3135331A GB3135331A GB386743A GB 386743 A GB386743 A GB 386743A GB 3135331 A GB3135331 A GB 3135331A GB 3135331 A GB3135331 A GB 3135331A GB 386743 A GB386743 A GB 386743A
Authority
GB
United Kingdom
Prior art keywords
current
signals
valve
audio
winding
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
GB3135331A
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and 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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Priority to GB3135331A priority Critical patent/GB386743A/en
Publication of GB386743A publication Critical patent/GB386743A/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
    • H04L27/06—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

386,743. Code telegraphy. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and CRUTCH, L. S., 15, Mundania Road, East Dulwich, both in London. Nov. 12, 1931, No. 31353. [Class 40 (iii).] Single-current signals, such as audio-frequency signals, are converted into doublecurrent signals by means of a valve so arranged that spacing current is cut off as soon as marking current is received. During spaces, current flows in the direction is through the winding M of apparatus such as the input magnet. of a printing telegraph. When, however, audio-frequency marking signals are received through transformer. T1, valve V, and copper-oxide rectifier RE, current flows in the direction im through the rectifier RE, and the potential-drop in the grid-biasing resistance R cuts off the spacing current through valve V1. The shape of the output signal may be controlled by means of impedances in series or parallel with the winding M or resistance R.
GB3135331A 1931-11-12 1931-11-12 Improvements in telegraphy and like signalling systems Expired GB386743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3135331A GB386743A (en) 1931-11-12 1931-11-12 Improvements in telegraphy and like signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3135331A GB386743A (en) 1931-11-12 1931-11-12 Improvements in telegraphy and like signalling systems

Publications (1)

Publication Number Publication Date
GB386743A true GB386743A (en) 1933-01-26

Family

ID=10321845

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3135331A Expired GB386743A (en) 1931-11-12 1931-11-12 Improvements in telegraphy and like signalling systems

Country Status (1)

Country Link
GB (1) GB386743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289177A (en) * 1994-04-29 1995-11-08 Plessey Semiconductors Ltd Receiver arrangement for receiving a current pulse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289177A (en) * 1994-04-29 1995-11-08 Plessey Semiconductors Ltd Receiver arrangement for receiving a current pulse
US5661754A (en) * 1994-04-29 1997-08-26 Plessey Semiconductors Limted Receiver arrangement
GB2289177B (en) * 1994-04-29 1998-04-15 Plessey Semiconductors Ltd Receiver arrangement

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