GB191501470A - Improvements in Automatic and Semi-automatic Telephone Systems. - Google Patents

Improvements in Automatic and Semi-automatic Telephone Systems.

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Publication number
GB191501470A
GB191501470A GB191501470DA GB191501470A GB 191501470 A GB191501470 A GB 191501470A GB 191501470D A GB191501470D A GB 191501470DA GB 191501470 A GB191501470 A GB 191501470A
Authority
GB
United Kingdom
Prior art keywords
line
relays
relay
automatic
code
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
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.)
BETULANDER AUTOMATIC TELEPHONE
Original Assignee
BETULANDER AUTOMATIC TELEPHONE
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 BETULANDER AUTOMATIC TELEPHONE filed Critical BETULANDER AUTOMATIC TELEPHONE
Publication of GB191501470A publication Critical patent/GB191501470A/en
Expired legal-status Critical Current

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Abstract

1470. Relay Automatic Telephone Co., [formerly Betulander Automatic Telephone Co.], and Aitken, W. Jan. 29. Automatic and semiautomatic exchange systems.-In systems using line-finders composed of relays, each calling line has associated with it a relay adapted to earth certain code wires, according to the code of the calling line, thereby controlling the circuits of the line-finder relays, and each line-finder has associated with it a code - wire - switching relay adapted to switch the code wires on to the next line-finder as soon as the associated linefinder is engaged. Each junction has a set of relays 2E, 3E, 4E controlling its connexion to the calling line, and each subscriber's line relay 1E has its code contacts arranged to energize one or more of the relays 2E, 3E, 4E, when connected thereto by the assignor relays 6E, 10E, &c. individual to the separate junctions. Thus the line relay of line h is arranged to energize all three relays, while that of line h<1> energizes relay 2E only. The energized switching-relays 2E, 3E, 4E loclcup in circuits controlled by the calling line.
GB191501470D 1915-01-29 1915-01-29 Improvements in Automatic and Semi-automatic Telephone Systems. Expired GB191501470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191501470T 1915-01-29

Publications (1)

Publication Number Publication Date
GB191501470A true GB191501470A (en) 1916-01-27

Family

ID=32673523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191501470D Expired GB191501470A (en) 1915-01-29 1915-01-29 Improvements in Automatic and Semi-automatic Telephone Systems.

Country Status (1)

Country Link
GB (1) GB191501470A (en)

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