GB191122805A - Improvements in a Subscriber's Instrument Set for Automatic Telephone Exchanges. - Google Patents

Improvements in a Subscriber's Instrument Set for Automatic Telephone Exchanges.

Info

Publication number
GB191122805A
GB191122805A GB191122805DA GB191122805A GB 191122805 A GB191122805 A GB 191122805A GB 191122805D A GB191122805D A GB 191122805DA GB 191122805 A GB191122805 A GB 191122805A
Authority
GB
United Kingdom
Prior art keywords
hook
switch
circuit
operated
subscriber
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
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 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
Application granted granted Critical
Publication of GB191122805A publication Critical patent/GB191122805A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/32—Locking setting devices during transmission to prevent interference by user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
GB191122805D 1911-10-16 1911-10-16 Improvements in a Subscriber's Instrument Set for Automatic Telephone Exchanges. Expired GB191122805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191122805T 1911-10-16

Publications (1)

Publication Number Publication Date
GB191122805A true GB191122805A (en) 1912-07-25

Family

ID=32567857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191122805D Expired GB191122805A (en) 1911-10-16 1911-10-16 Improvements in a Subscriber's Instrument Set for Automatic Telephone Exchanges.

Country Status (2)

Country Link
DE (1) DE247628C (enrdf_load_stackoverflow)
GB (1) GB191122805A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE247628C (enrdf_load_stackoverflow)

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