GB191311658A - Improvements in Electrical Control Clocks for Trunk Line Switchboards. - Google Patents

Improvements in Electrical Control Clocks for Trunk Line Switchboards.

Info

Publication number
GB191311658A
GB191311658A GB191311658DA GB191311658A GB 191311658 A GB191311658 A GB 191311658A GB 191311658D A GB191311658D A GB 191311658DA GB 191311658 A GB191311658 A GB 191311658A
Authority
GB
United Kingdom
Prior art keywords
lamps
time
cams
springs
trunk line
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
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of GB191311658A publication Critical patent/GB191311658A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromechanical Clocks (AREA)
  • Rehabilitation Tools (AREA)
GB191311658D 1912-05-21 1913-05-19 Improvements in Electrical Control Clocks for Trunk Line Switchboards. Expired GB191311658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE191311658X 1912-05-21

Publications (1)

Publication Number Publication Date
GB191311658A true GB191311658A (en) 1913-08-21

Family

ID=32391085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191311658D Expired GB191311658A (en) 1912-05-21 1913-05-19 Improvements in Electrical Control Clocks for Trunk Line Switchboards.

Country Status (3)

Country Link
DE (1) DE274051C (https=)
FR (1) FR459120A (https=)
GB (1) GB191311658A (https=)

Also Published As

Publication number Publication date
DE274051C (https=)
FR459120A (fr) 1913-10-28

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