GB351487A - Improvements in telegraph circuits - Google Patents

Improvements in telegraph circuits

Info

Publication number
GB351487A
GB351487A GB9639/30A GB963930A GB351487A GB 351487 A GB351487 A GB 351487A GB 9639/30 A GB9639/30 A GB 9639/30A GB 963930 A GB963930 A GB 963930A GB 351487 A GB351487 A GB 351487A
Authority
GB
United Kingdom
Prior art keywords
line
relay
traffic
fed
repeater station
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
GB9639/30A
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
Priority to GB9639/30A priority Critical patent/GB351487A/en
Priority to FR700201D priority patent/FR700201A/en
Priority to US489997A priority patent/US1834279A/en
Publication of GB351487A publication Critical patent/GB351487A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/18—Automatic changing of the traffic direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (AREA)

Abstract

351,487. Code telegraphy. CREED & CO., Ltd., Telegraph Works, and JARVIS, F. W., 30, Westbourne Road, both in Croydon. March 26, 1930, No. 9639. [Class 40 (iii).] At a repeater station in a double-current simplex line, the relays for controlling the direction of traffic are fed from dry metal or other rectifiers so arranged as to prevent chattering of the relay contacts. When idle, the lines 1, 7 are earthed through distant receivers (not shown) and the repeater station is in the condition shown. When traffic is to pass from line 1 to line 7, a. spacing current is put on line 1 and energizes relay 8 by way of rectifier bridge 5. Relay 8 cuts in switch 6, which connects the out line 7 to the tongue of transmitting relay 3 fed bv line 1, at the same time cutting off line 7 from the winding 10 of its own transmitting relay. Message impulses, rectified by the bridge 5 and smoothed by the shunted condenser 4, keep the relay 8 continuously energized and maintain a firm contact.
GB9639/30A 1930-03-26 1930-03-26 Improvements in telegraph circuits Expired GB351487A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9639/30A GB351487A (en) 1930-03-26 1930-03-26 Improvements in telegraph circuits
FR700201D FR700201A (en) 1930-03-26 1930-08-08 Improvements to simplex telegraph systems
US489997A US1834279A (en) 1930-03-26 1930-10-20 Telegraph circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9639/30A GB351487A (en) 1930-03-26 1930-03-26 Improvements in telegraph circuits

Publications (1)

Publication Number Publication Date
GB351487A true GB351487A (en) 1931-06-26

Family

ID=9875866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9639/30A Expired GB351487A (en) 1930-03-26 1930-03-26 Improvements in telegraph circuits

Country Status (3)

Country Link
US (1) US1834279A (en)
FR (1) FR700201A (en)
GB (1) GB351487A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89721C (en) * 1954-06-28
US3103647A (en) * 1959-07-01 1963-09-10 Bell Telephone Labor Inc Transmitter and receiver signaling circuits

Also Published As

Publication number Publication date
US1834279A (en) 1931-12-01
FR700201A (en) 1931-02-26

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