FR831509A - Improvements to pulse transmitters - Google Patents

Improvements to pulse transmitters

Info

Publication number
FR831509A
FR831509A FR831509DA FR831509A FR 831509 A FR831509 A FR 831509A FR 831509D A FR831509D A FR 831509DA FR 831509 A FR831509 A FR 831509A
Authority
FR
France
Prior art keywords
pulse transmitters
transmitters
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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 Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of FR831509A publication Critical patent/FR831509A/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
FR831509D 1937-01-02 1937-12-30 Improvements to pulse transmitters Expired FR831509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US508511XA 1937-01-02 1937-01-02

Publications (1)

Publication Number Publication Date
FR831509A true FR831509A (en) 1938-09-07

Family

ID=21967872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR831509D Expired FR831509A (en) 1937-01-02 1937-12-30 Improvements to pulse transmitters

Country Status (3)

Country Link
BE (1) BE425496A (en)
FR (1) FR831509A (en)
GB (1) GB508511A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025939B (en) * 1955-09-19 1958-03-13 Ericsson Telefon Ab L M Dial for automatic telephone systems

Also Published As

Publication number Publication date
BE425496A (en) 1938-01-31
GB508511A (en) 1939-06-30

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