GB429095A - Exchange system for audio frequency subscriber telegraphy - Google Patents

Exchange system for audio frequency subscriber telegraphy

Info

Publication number
GB429095A
GB429095A GB30959/33A GB3095933A GB429095A GB 429095 A GB429095 A GB 429095A GB 30959/33 A GB30959/33 A GB 30959/33A GB 3095933 A GB3095933 A GB 3095933A GB 429095 A GB429095 A GB 429095A
Authority
GB
United Kingdom
Prior art keywords
relay
telegraphic
over
repeater
impulses
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
GB30959/33A
Other languages
English (en)
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 and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Publication of GB429095A publication Critical patent/GB429095A/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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/28—Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
GB30959/33A 1932-11-08 1933-11-07 Exchange system for audio frequency subscriber telegraphy Expired GB429095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE429095X 1932-11-08

Publications (1)

Publication Number Publication Date
GB429095A true GB429095A (en) 1935-05-24

Family

ID=6477562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30959/33A Expired GB429095A (en) 1932-11-08 1933-11-07 Exchange system for audio frequency subscriber telegraphy

Country Status (3)

Country Link
FR (1) FR764899A (enrdf_load_stackoverflow)
GB (1) GB429095A (enrdf_load_stackoverflow)
NL (2) NL67333C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL40027C (enrdf_load_stackoverflow)
NL67333C (enrdf_load_stackoverflow)
FR764899A (fr) 1934-05-29

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