GB326839A - Improvements in telegraphic communication systems - Google Patents

Improvements in telegraphic communication systems

Info

Publication number
GB326839A
GB326839A GB37767/28A GB3776728A GB326839A GB 326839 A GB326839 A GB 326839A GB 37767/28 A GB37767/28 A GB 37767/28A GB 3776728 A GB3776728 A GB 3776728A GB 326839 A GB326839 A GB 326839A
Authority
GB
United Kingdom
Prior art keywords
telegraph
buzzers
microphones
communication systems
microphone
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
GB37767/28A
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.)
Muirhead and Co Ltd
Original Assignee
Muirhead 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 Muirhead and Co Ltd filed Critical Muirhead and Co Ltd
Priority to GB37767/28A priority Critical patent/GB326839A/en
Priority to US414698A priority patent/US1821146A/en
Publication of GB326839A publication Critical patent/GB326839A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Facsimiles In General (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

326,839. Muirhead & Co., Ltd., and Foll, J. V. Dec. 21, 1928. Type-printing telegraphs.-In a system for transmitting telegraph messages over an existing telephone system, one or more buzzers C controlled by a telegraph keyboard T<2> are arranged in proximity to the usual microphone A<1>, and the corresponding sounds produced in the distant receiver B<2> excite one or more additional microphones G which control a printer P'. The telegraph signals may comprise combinations of elements from a single buzzer or, alternatively, two or more buzzers of different notes may be used, in which case the receiving arrangements comprise a number of correspondingly tuned microphones or a single aperiodic microphone associated with a number of parallel circuits. Amplifiers and/or rectifiers H<1> may be inserted if required.
GB37767/28A 1928-12-21 1928-12-21 Improvements in telegraphic communication systems Expired GB326839A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB37767/28A GB326839A (en) 1928-12-21 1928-12-21 Improvements in telegraphic communication systems
US414698A US1821146A (en) 1928-12-21 1929-12-17 Telegraphic communicating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37767/28A GB326839A (en) 1928-12-21 1928-12-21 Improvements in telegraphic communication systems

Publications (1)

Publication Number Publication Date
GB326839A true GB326839A (en) 1930-03-21

Family

ID=10398867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37767/28A Expired GB326839A (en) 1928-12-21 1928-12-21 Improvements in telegraphic communication systems

Country Status (2)

Country Link
US (1) US1821146A (en)
GB (1) GB326839A (en)

Also Published As

Publication number Publication date
US1821146A (en) 1931-09-01

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