GB361596A - Improvements in or relating to keysending mechanisms for telephone exchanges - Google Patents

Improvements in or relating to keysending mechanisms for telephone exchanges

Info

Publication number
GB361596A
GB361596A GB3431230A GB3431230A GB361596A GB 361596 A GB361596 A GB 361596A GB 3431230 A GB3431230 A GB 3431230A GB 3431230 A GB3431230 A GB 3431230A GB 361596 A GB361596 A GB 361596A
Authority
GB
United Kingdom
Prior art keywords
wires
register
markings
transformer
operates
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
GB3431230A
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.)
COVENTRY AUTOM TELEPHONES Ltd
OLIVER IRVING CARPENTER
Original Assignee
COVENTRY AUTOM TELEPHONES Ltd
OLIVER IRVING CARPENTER
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 COVENTRY AUTOM TELEPHONES Ltd, OLIVER IRVING CARPENTER filed Critical COVENTRY AUTOM TELEPHONES Ltd
Priority to GB3431230A priority Critical patent/GB361596A/en
Publication of GB361596A publication Critical patent/GB361596A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

361,596. Semi-automatic exchange systems. COVENTRY AUTOMATIC TELEPHONES, Ltd., CARPENTER, O. I., and CHUBB, A. A., of General Electric Co., Stoke, Coventry. Nov. 14, 1930, No. 34312. [Class 40 (iv).] In a keysender in which markings by the keys on one or more of a number of wires are stored and transmitted as alternating current signals, each signal and interdigital pause is given a minimum duration to ensure correct operation of apparatus controlled thereby. The key-set P operates the register sets AW.. AZ, BW.. BZ, &c. in turn under the control of relays KA.. KD which operate in turn on re:.ease of each digit key. When KA operates, A pulls up over wipers fs3, fs6 of distributer switch FS which takes one step, releases A, and then takes a second step. It is assumed at present that leads 10, 11 and transformer RC are removed. During the combined operating and release times of A, ground from 9 is connected over fs5 and operated contacts of the first register set to one or more of wires 5 .. 8. If or when the second register has been set, KB operates B and FS takes two similar steps under the control of B during which markings are not transmitted. A then reoperates and markings corresponding to the setting of the second register are connected to wires 5 .. 8. The remaining digits are similarly transmitted, KA falls back, releases KB, KC, KD, and the register in turn, and FS goes home. Wires 5 .. 8 are connected to a source of A.C or to sources of different frequencies and primary windings of transformers are inserted in the wires at 12 .. 15. The secondaries are connected to ground at one end and four outgoing wires at the other end. If different frequencies are to be superposed on one circuit, leads 10, 11 and transformer RC are provided, lead 9 is removed, and wires 5 .. 8 are connected to the sources, the transformers in these wires being omitted. The voice-frequency markings for any digit are now combined over wiper fs5 and pass to line over transformer RC. In modifications, the switch FS is replaced by a relay distributer or by a switch driven at uniform speed, or storage may be completed before transmission commences.
GB3431230A 1930-11-14 1930-11-14 Improvements in or relating to keysending mechanisms for telephone exchanges Expired GB361596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3431230A GB361596A (en) 1930-11-14 1930-11-14 Improvements in or relating to keysending mechanisms for telephone exchanges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3431230A GB361596A (en) 1930-11-14 1930-11-14 Improvements in or relating to keysending mechanisms for telephone exchanges

Publications (1)

Publication Number Publication Date
GB361596A true GB361596A (en) 1931-11-26

Family

ID=10364060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3431230A Expired GB361596A (en) 1930-11-14 1930-11-14 Improvements in or relating to keysending mechanisms for telephone exchanges

Country Status (1)

Country Link
GB (1) GB361596A (en)

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