FR599575A - Call device - Google Patents

Call device

Info

Publication number
FR599575A
FR599575A FR599575DA FR599575A FR 599575 A FR599575 A FR 599575A FR 599575D A FR599575D A FR 599575DA FR 599575 A FR599575 A FR 599575A
Authority
FR
France
Prior art keywords
call device
call
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR599575A publication Critical patent/FR599575A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • 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
    • H04M1/34—Lost-motion or other arrangements for ensuring a pause between successive digit transmissions

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Transmission Devices (AREA)
  • Telephone Function (AREA)
  • Cash Registers Or Receiving Machines (AREA)
FR599575D 1924-05-15 1925-05-14 Call device Expired FR599575A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US234036XA 1924-05-15 1924-05-15
US599575XA 1924-05-15 1924-05-15

Publications (1)

Publication Number Publication Date
FR599575A true FR599575A (en) 1926-01-15

Family

ID=26697092

Family Applications (2)

Application Number Title Priority Date Filing Date
FR599575D Expired FR599575A (en) 1924-05-15 1925-05-14 Call device
FR39059D Expired FR39059E (en) 1924-05-15 1930-09-19 Call device

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR39059D Expired FR39059E (en) 1924-05-15 1930-09-19 Call device

Country Status (3)

Country Link
BE (1) BE343067A (en)
FR (2) FR599575A (en)
GB (3) GB237290A (en)

Also Published As

Publication number Publication date
GB352469A (en) 1931-07-08
GB237290A (en) 1925-10-14
BE343067A (en) 1927-07-30
FR39059E (en) 1931-08-25
GB234036A (en) 1925-10-14

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