GB740216A - Improvements in or relating to apparatus at printing telegraph subscriber stations - Google Patents

Improvements in or relating to apparatus at printing telegraph subscriber stations

Info

Publication number
GB740216A
GB740216A GB5733/54A GB573354A GB740216A GB 740216 A GB740216 A GB 740216A GB 5733/54 A GB5733/54 A GB 5733/54A GB 573354 A GB573354 A GB 573354A GB 740216 A GB740216 A GB 740216A
Authority
GB
United Kingdom
Prior art keywords
contact
motor
speed
resistance
telegraph
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
GB5733/54A
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.)
Creed and Co Ltd
Original Assignee
Creed and 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 Creed and Co Ltd filed Critical Creed and Co Ltd
Publication of GB740216A publication Critical patent/GB740216A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

740,216. Telegraph exchange systems. CREED & CO., Ltd. Feb. 26, 1954 [March 7, 1953], No. 5733/54. Class 40 (3). In a telegraph system comprising subscriber equipment including a motor and a manuallyoperated perforating device, operable when the telegraph line is disconnected, the speed of the motor is increased above that employed during the normal printing operation when the device is to be operated. The motor 1 with serieswound windings 2, 3 is maintained at the appropriate speed during normal operation by a governor-controlled contact 4 which is opened when the speed rises above normal to switch in a resistance 5. When the perforating apparatus is to be taken into use a contact 6, closed by a supervisory relay, short-circuits the control by contact 4 and resistance 5 so that the speed of the motor increases. If the increased speed is to be limited, a coarse regulator device opens a contact 7 to introduce a resistance 8 into the motor supply circuit. When contact 6 is opened for the resumption of the normal printing operation, the resistance 5 is effective to reduce the speed of the motor until it again comes under the joint control of the contact 4 and the resistance 5.
GB5733/54A 1953-03-07 1954-02-26 Improvements in or relating to apparatus at printing telegraph subscriber stations Expired GB740216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE740216X 1953-03-07

Publications (1)

Publication Number Publication Date
GB740216A true GB740216A (en) 1955-11-09

Family

ID=6643411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5733/54A Expired GB740216A (en) 1953-03-07 1954-02-26 Improvements in or relating to apparatus at printing telegraph subscriber stations

Country Status (1)

Country Link
GB (1) GB740216A (en)

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