GB257310A - Improvements in automatic and semi-automatic telephone systems - Google Patents

Improvements in automatic and semi-automatic telephone systems

Info

Publication number
GB257310A
GB257310A GB1079825A GB1079825A GB257310A GB 257310 A GB257310 A GB 257310A GB 1079825 A GB1079825 A GB 1079825A GB 1079825 A GB1079825 A GB 1079825A GB 257310 A GB257310 A GB 257310A
Authority
GB
United Kingdom
Prior art keywords
relay
over
energizes
contact
wire
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
GB1079825A
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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
Priority to FR620438D priority Critical patent/FR620438A/fr
Application filed by Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Priority to GB1079825A priority patent/GB257310A/en
Publication of GB257310A publication Critical patent/GB257310A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB1079825A 1925-04-25 1925-04-25 Improvements in automatic and semi-automatic telephone systems Expired GB257310A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR620438D FR620438A (enrdf_load_html_response) 1925-04-25
GB1079825A GB257310A (en) 1925-04-25 1925-04-25 Improvements in automatic and semi-automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1079825A GB257310A (en) 1925-04-25 1925-04-25 Improvements in automatic and semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB257310A true GB257310A (en) 1926-08-25

Family

ID=9974447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1079825A Expired GB257310A (en) 1925-04-25 1925-04-25 Improvements in automatic and semi-automatic telephone systems

Country Status (2)

Country Link
FR (1) FR620438A (enrdf_load_html_response)
GB (1) GB257310A (enrdf_load_html_response)

Also Published As

Publication number Publication date
FR620438A (enrdf_load_html_response) 1927-04-22

Similar Documents

Publication Publication Date Title
GB257310A (en) Improvements in automatic and semi-automatic telephone systems
US2225305A (en) Telephone system
GB300497A (en) Improvements in or relating to telephone systems
US2486111A (en) Balancing of ring cutoff circuit for long and short lines
US1522875A (en) Telephone-exchange system
US1743407A (en) Telephone system
US1315440A (en) willis
GB227510A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB134193A (en) Improvements in or relating to Automatic or Semi-automatic Telephone Systems.
GB247555A (en) Improvements in or relating to telephone systems
GB274518A (en) Improvements in telephone systems
GB221474A (en) Improvements in or relating to telephone systems
GB270782A (en) Improvements in or relating to telephone systems
GB282153A (en) Improvements in telephone systems
GB289296A (en) Improvements in remotely controlled line selecting or telephone systems
GB241522A (en) Improvements in or relating to telephone systems
GB231237A (en) Improved circuit arrangements for selectors in automatic telephone systems
GB231335A (en) Improvements in or relating to telephone systems employing selecting devices
GB222079A (en) Improvements in automatic or semi-automatic telephone systems
GB231260A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB253972A (en) Improvements in automatic or semi-automatic telephone systems
GB271142A (en) Improved circuit arrangements for selectors in automatic and semi-automatic telephone systems
GB219942A (en) Improvements in telephone systems
GB264229A (en) Improvements in or relating to telephone systems
GB464338A (en) Improvements in or relating to telephone systems