FR454829A - Electrical impulse transmitter for automatic telephone systems - Google Patents

Electrical impulse transmitter for automatic telephone systems

Info

Publication number
FR454829A
FR454829A FR454829A FR454829DA FR454829A FR 454829 A FR454829 A FR 454829A FR 454829 A FR454829 A FR 454829A FR 454829D A FR454829D A FR 454829DA FR 454829 A FR454829 A FR 454829A
Authority
FR
France
Prior art keywords
telephone systems
electrical impulse
automatic telephone
impulse transmitter
transmitter
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
FR454829A
Other languages
French (fr)
Inventor
Gotthilf Ansgarius Betulander
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR454829A publication Critical patent/FR454829A/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
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transmission Devices (AREA)
  • Telephone Set Structure (AREA)
FR454829A 1912-02-28 1913-02-27 Electrical impulse transmitter for automatic telephone systems Expired FR454829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE57112 1912-02-28

Publications (1)

Publication Number Publication Date
FR454829A true FR454829A (en) 1913-07-16

Family

ID=62185971

Family Applications (1)

Application Number Title Priority Date Filing Date
FR454829A Expired FR454829A (en) 1912-02-28 1913-02-27 Electrical impulse transmitter for automatic telephone systems

Country Status (4)

Country Link
AU (1) AU816813B (en)
DE (1) DE271488C (en)
FR (1) FR454829A (en)
GB (1) GB191304792A (en)

Also Published As

Publication number Publication date
GB191304792A (en) 1913-09-25
DE271488C (en) 1914-03-14
AU816813B (en) 1913-10-28

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