GB359852A - Improvements in or relating to impulse transmitters for use in telephone or like systems - Google Patents

Improvements in or relating to impulse transmitters for use in telephone or like systems

Info

Publication number
GB359852A
GB359852A GB646931A GB646931A GB359852A GB 359852 A GB359852 A GB 359852A GB 646931 A GB646931 A GB 646931A GB 646931 A GB646931 A GB 646931A GB 359852 A GB359852 A GB 359852A
Authority
GB
United Kingdom
Prior art keywords
impulse
dial
normal speed
telephone
relating
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
GB646931A
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.)
Telephon Apparat Fabrik E Zwietusch and Co
Original Assignee
Telephon Apparat Fabrik E Zwietusch and Co
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 Telephon Apparat Fabrik E Zwietusch and Co filed Critical Telephon Apparat Fabrik E Zwietusch and Co
Publication of GB359852A publication Critical patent/GB359852A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Keying Circuit Devices (AREA)
GB646931A 1930-07-08 1931-03-02 Improvements in or relating to impulse transmitters for use in telephone or like systems Expired GB359852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE579407T 1930-07-08

Publications (1)

Publication Number Publication Date
GB359852A true GB359852A (en) 1931-10-29

Family

ID=34584667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB646931A Expired GB359852A (en) 1930-07-08 1931-03-02 Improvements in or relating to impulse transmitters for use in telephone or like systems

Country Status (4)

Country Link
DE (1) DE579407C (uk)
FR (1) FR713878A (uk)
GB (1) GB359852A (uk)
NL (1) NL31271C (uk)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1007815B (de) * 1951-12-26 1957-05-09 Lorenz C Ag Nummernschalter fuer Fernsprechgeraete mit einem von der Ablaufspindel gesteuerten Traegheitskontakt

Also Published As

Publication number Publication date
FR713878A (fr) 1931-11-04
DE579407C (de) 1933-06-26
NL31271C (uk)

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