FR453608A - Pulse transmitter device for automatic telephone systems - Google Patents

Pulse transmitter device for automatic telephone systems

Info

Publication number
FR453608A
FR453608A FR453608DA FR453608A FR 453608 A FR453608 A FR 453608A FR 453608D A FR453608D A FR 453608DA FR 453608 A FR453608 A FR 453608A
Authority
FR
France
Prior art keywords
transmitter device
telephone systems
automatic telephone
pulse transmitter
pulse
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
French (fr)
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.)
Automatic Electric Co
Original Assignee
Automatic Electric 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 Automatic Electric Co filed Critical Automatic Electric Co
Application granted granted Critical
Publication of FR453608A publication Critical patent/FR453608A/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
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
FR453608D 1912-02-02 1913-01-25 Pulse transmitter device for automatic telephone systems Expired FR453608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US453608XA 1912-02-02 1912-02-02

Publications (1)

Publication Number Publication Date
FR453608A true FR453608A (en) 1913-06-12

Family

ID=21937438

Family Applications (1)

Application Number Title Priority Date Filing Date
FR453608D Expired FR453608A (en) 1912-02-02 1913-01-25 Pulse transmitter device for automatic telephone systems

Country Status (2)

Country Link
DE (1) DE453608C (en)
FR (1) FR453608A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907751C (en) * 1951-12-29 1954-03-29 Erwin Bradler Drawing triangle with protractor

Also Published As

Publication number Publication date
DE453608C (en) 1927-12-19

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