GB198632A - Automatic telephone exchange system - Google Patents

Automatic telephone exchange system

Info

Publication number
GB198632A
GB198632A GB887423A GB887423A GB198632A GB 198632 A GB198632 A GB 198632A GB 887423 A GB887423 A GB 887423A GB 887423 A GB887423 A GB 887423A GB 198632 A GB198632 A GB 198632A
Authority
GB
United Kingdom
Prior art keywords
group
connector
marking
wipers
marking switch
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
GB887423A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB887423A priority Critical patent/GB198632A/en
Priority to US601399A priority patent/US1541779A/en
Publication of GB198632A publication Critical patent/GB198632A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Structure Of Telephone Exchanges (AREA)

Abstract

198,632. Baron, H., (Aldendorff, F.). Feb. 28, 1922. Addition to 188,689. Drawings to Specification. Automatic exchange systems and apparatus; metering.-Relates to 'automatic exchange systems as described in the parent Specification in which a group marking switch first steers the wipers of a uni-motional connector on to a particular group of lines, the wipers being advanced while the group marking switch is receiving numerical impulses, and a line marking switch then causes the wipers to move to a wanted line in this group. According to the present invention, both marking switches are permanently associated with the connector. On the connector wipers engaging a wanted line, the line marking switch is restored, the ringing relay being continuously energized during its restoring moveits arms. The wanted subscriber thus receives a continuous preliminary ringing current which, however, is replaced by the usual intermittent ringing current when the line marking switch arrives at its normal position. Release of the connector is controlled by the group-marking switch which on the calling party hanging up moves to a sub-normal position in which potential is applied to all the group marking contacts of the connector, causing it to move to normal, after which the group marking switch is advanced a further step to its true normal position. The system described is identical with that described in Specification 195,439, in which the above operations are described in detail and in which other features are claimed. Specification 196,990 also is referred to.
GB887423A 1922-02-28 1922-02-28 Automatic telephone exchange system Expired GB198632A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB887423A GB198632A (en) 1922-02-28 1922-02-28 Automatic telephone exchange system
US601399A US1541779A (en) 1922-02-28 1922-11-16 Electromechanical telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB887423A GB198632A (en) 1922-02-28 1922-02-28 Automatic telephone exchange system

Publications (1)

Publication Number Publication Date
GB198632A true GB198632A (en) 1923-05-28

Family

ID=9860932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB887423A Expired GB198632A (en) 1922-02-28 1922-02-28 Automatic telephone exchange system

Country Status (1)

Country Link
GB (1) GB198632A (en)

Similar Documents

Publication Publication Date Title
GB567864A (en) Improvements in or relating to telecommunication exchange systems
US2650950A (en) Telephone line lockout adapter
GB198632A (en) Automatic telephone exchange system
GB230104A (en) Improvements in or relating to telephone systems
US1665466A (en) Automatic telephone system
US2985721A (en) Telephone answering service system
US2595388A (en) Telephone conversation timing means
US2976368A (en) Incoming trunk circuit for in-dialing service
US1393502A (en) Machine-switching telephone system
US3193621A (en) Telephone line finder
US1298293A (en) Telephone system.
US3041410A (en) Delay busy circuit
US1030039A (en) Automatic ringing system.
US1399998A (en) Telephone system
US1383802A (en) Signaling device
GB474990A (en) Improvements in or relating to automatic or semi-automatic telephone and like telecommunicating or signalling systems
US1279841A (en) Telephone-exchange system.
US1475216A (en) Telephone system
GB1265084A (en)
US1202367A (en) Reverting busy-test for telephone systems.
US2486111A (en) Balancing of ring cutoff circuit for long and short lines
US1324796A (en) Telephone-exchange system
US1396730A (en) Telephone system
US1514718A (en) Telephone system
US2025925A (en) Telephone system