GB190104007A - Improvements in Telephonic Apparatus for Central Stations. - Google Patents

Improvements in Telephonic Apparatus for Central Stations.

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Publication number
GB190104007A
GB190104007A GB190104007DA GB190104007A GB 190104007 A GB190104007 A GB 190104007A GB 190104007D A GB190104007D A GB 190104007DA GB 190104007 A GB190104007 A GB 190104007A
Authority
GB
United Kingdom
Prior art keywords
coil
signal
shunted
parallel
choking
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
Inventor
Denton Abel Charles
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 and Halske AG
Original Assignee
Siemens and Halske AG
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 Siemens and Halske AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of GB190104007A publication Critical patent/GB190104007A/en
Expired legal-status Critical Current

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Abstract

4007. Abel, C. D., [Siemens & Halske Akt.- Ges.]. Feb. 25. Telephone systems. - Relates to parallel jack multiple-board telephone systems. The jacks are so arranged that the insertion of the answering- plug b cuts off the signal a, while the insertion of the calling-plug g bridges the line with the central battery i, thus strengthening the called subscriber's signal a', so that a calling-current will not operate the same. The signal coils may be variously arranged. In one form, a coil with high induction is arranged in parallel with the coil a, and breaks its circuit when the central battery is put to line. Again, a cut-out coil, shunted by a polarization cell or condenser, has a choking coil in series, and may be arranged in parallel with the signal coil. The cut-out coil may be double-wound, only one coil being shunted by the condenser &c. The cutout coil and choking coil may be in series with the signal coil, but with the choking coil normally shunted.
GB190104007D 1901-02-25 1901-02-25 Improvements in Telephonic Apparatus for Central Stations. Expired GB190104007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190104007T 1901-02-25

Publications (1)

Publication Number Publication Date
GB190104007A true GB190104007A (en) 1901-03-30

Family

ID=32421094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190104007D Expired GB190104007A (en) 1901-02-25 1901-02-25 Improvements in Telephonic Apparatus for Central Stations.

Country Status (1)

Country Link
GB (1) GB190104007A (en)

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