GB495795A - Improvements in current supply arrangements for use in telephone or like systems - Google Patents

Improvements in current supply arrangements for use in telephone or like systems

Info

Publication number
GB495795A
GB495795A GB1410137A GB1410137A GB495795A GB 495795 A GB495795 A GB 495795A GB 1410137 A GB1410137 A GB 1410137A GB 1410137 A GB1410137 A GB 1410137A GB 495795 A GB495795 A GB 495795A
Authority
GB
United Kingdom
Prior art keywords
condensers
telephone
systems
current supply
arrangement
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
GB1410137A
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB1410137A priority Critical patent/GB495795A/en
Publication of GB495795A publication Critical patent/GB495795A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Abstract

495,795. Automatic exchange systems; electricity supply. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and FRYDMAN, E. May 20, 1937, No. 14101. [Class 40 (iv)] [Also in Group XXXV] An arrangement for obtaining a booster voltage from the main battery in a small office comprises a set of relays K, L, M connected up when necessary by contacts such as 10 and operated cyclically to control the charge and discharge of electrolytic condensers QA ...QC. The arrangement is preferably such that at all times two condensers are connected to the booster bus-bar 11 and the other is being charged. Low resistances YA ... YC limit the current if the condensers are accidentally short-circuited.
GB1410137A 1937-05-20 1937-05-20 Improvements in current supply arrangements for use in telephone or like systems Expired GB495795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1410137A GB495795A (en) 1937-05-20 1937-05-20 Improvements in current supply arrangements for use in telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1410137A GB495795A (en) 1937-05-20 1937-05-20 Improvements in current supply arrangements for use in telephone or like systems

Publications (1)

Publication Number Publication Date
GB495795A true GB495795A (en) 1938-11-21

Family

ID=10034990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1410137A Expired GB495795A (en) 1937-05-20 1937-05-20 Improvements in current supply arrangements for use in telephone or like systems

Country Status (1)

Country Link
GB (1) GB495795A (en)

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