US1601941A - Submarine telegraph system - Google Patents

Submarine telegraph system Download PDF

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Publication number
US1601941A
US1601941A US592216A US59221622A US1601941A US 1601941 A US1601941 A US 1601941A US 592216 A US592216 A US 592216A US 59221622 A US59221622 A US 59221622A US 1601941 A US1601941 A US 1601941A
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US
United States
Prior art keywords
relay
line
contact
terminal
circuit
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 - Lifetime
Application number
US592216A
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English (en)
Inventor
Allison A Clokey
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US592216A priority Critical patent/US1601941A/en
Priority to GB176/25A priority patent/GB228828A/en
Priority to DEE38109D priority patent/DE513758C/de
Priority to FR570610D priority patent/FR570610A/fr
Priority to NL31380A priority patent/NL17867C/xx
Priority to NL31379A priority patent/NL17670C/xx
Application granted granted Critical
Publication of US1601941A publication Critical patent/US1601941A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • This invention relates to automatic signaling over transmission lines and particularly to telegraphic signaling over submarine cables.
  • Ihe principal object of the invention is to provide a method and means for changing at desired times the direction of signal transmission over a line or cable over which messages are transmitted in one direction only at one 1 one.
  • the present invention provides means for simplex operation comprising automatic means for reversing the direction of transmission from time to time in a manner. when necessary, to provide for heavier trafiic conditions in one direction than the other. A minimum loss of line or cable time at the periods of reversal is obtained and the occurrence of false or overlapping signals is prevented.
  • Each end of the cable is provided with a distributor comprising a sending face S, a receiving face R and a correcting face C, the brushes A, B, and D associated therewith being driven by an impulse motor E controlled by a drivingfork F.
  • the two distributors are maintained in synchronism. by means of the electrical correction method which is well known in the art, comprising a leak relay G, a corrector relay H and a resistance I which is in series with the fork driving magnet J. Transmission is accomplished in the usual manner by a perforated-tape controlled transmitter K, operating in conjunction with the segmented sending ring L, local ring 0. local segment P, and brush A of the sending face S.
  • the line impulses are received on a line relay M.
  • a shaft 2, carrying a contact closing cam 5, is driven by the distributor shaft 1 through reduction gear trains 3 and 4:, of such ratios as to cause shaft 2 to make approximately one revolution per minute when distributor shaft 1 is rotating at the speed which corresponds to the normal transmission speed of the associated line circuit.
  • Shaft 6', carrying contact closing cams/7'. 8, and 9, is driven by shaft 2 through reduction gears to make one complete revolution for each 20 revolutions of the latter shaft, or approximately one revolution in 20 min. utes.
  • a cam follower 11 is arranged to be pressed against its negative contact by the raised portion 16, and against its positive contact by the depression 17 in the periphery of cam 7.
  • Conductor 19 is connected to a local transmitter control segment Z and local receiving control segment 1V.
  • segment X Corresponding in position to segment Z, and connected thereto during a brief portion of a revolution of brush A, is segment X, which is connected through a polarized relay 20, contact 21 and armature 22 of the printer control relay 23 to ground at 24.
  • segment Y On the receiving face of the distributor, is connected through a polarized relay 25 to contact 26 of transmitter control relay 27.
  • the cable is connected through armature 28 and contact 29 of transmitter control relay 27, sending condenser 30. to the common sending ring 31, and transmitter K is made operative by means of ground 32, applied to it through armature 33 and contact 34 of transmitter control relay 27.
  • the line circuit to the receiving relay M and distortion correction network 50 is disconnected at contact 35 of transmitter control relay 27 and the tongue of printing relay N is disconnected from the receiving common ring 36 by separation of armature 39 from contact 37 of the printer control relay 23.
  • the printer V is made inoperative by the open contact 38 of printer control relay 23, and the speed correction circuit is also made inoperative by a shunt circuit to ground 40 around the contacts of corrector relay H through contact 42 and armature 41 of rela 23.
  • the distributor brushes at opposite ends of the cable must be rotating at the same angular velocity and the angular displacement of the receiving brush with respect to the distant sending brush must represent at any instant the time required for a transmitted signal to traverse the entire length of the line plus the time required for the receiving relay to respond to an incoming signal.
  • the printer at the station shown will remain inoperative, and the transmitter will continue to apply signaling impulses to the line until the coincident closure of cam follower 11 against its negative contact, circuit closer 10, and the gap between control segments Z and X of the transmitting face by the brush connections causes negative battery to be applied to the winding of polarized relay 20, thus reversing the position of its armature, and causing the magnet of transmitter control relay 27 to be energized.
  • the attraction of the armature of relay 27 causes the cable connection to be transferred from the common sending ring 31 to the winding of line relay M, and simultaneously removes ground 32 from transmitter K and applies it through armature 33 and contact 26 of transmitter control relay 27 to the winding of polarized relay 25.
  • the transmitter circuit is made inoperative and if segments Z and X are properly positioned, this operation occurs after brush A has completed the transmission of a five-unit combination, but before it has started upon the transmission of the next succeeding combination set up on the transmitter associated with the adjacent channel.
  • Ground 24 is simultaneously applied to the printer local through contact 38 of relay 23, and the armature circuit of printing relay N is connected through armature 39 and contact 37 of relay 23 to the common receiving ring 36, thus making the printer responsive to receive line impulses.
  • the operation of relay 23 also opens the connection between its armature 41 and contact 42, thus removing the ground 40 from the resistance I in the correcting circuit of the driving fork F, thus placing the speed correction of the fork under control of the corrector relay H.
  • the return of the armatures of relay 27 to their original positions against their back contacts causes the cable to be disconnected from the winding of line relay M at contact 35 and to be connected through armature 28 and contact 29 to the sending condenser 30 and the common sending ring 31 of the sending face S.
  • The" local circuit of transmitter K is madeoperative by the connection to ground at 32 established between armature 33 and contact 34, while the polarized relay 25 is made inoperative when the rotation of cams 5 and 7 preparatory the ground 32 on armature 33 is removed from contact 26.
  • the distributors at opposite ends of the line are in synchronism and the passage of brush B over the control segments W and Y of the receiving face R 00- T curs at such time with respect to the passage of the sending brush oy er control segments corresponding to segments Z and X on the sending face at the distant or transmitting end as to cause the local and line connec-75 tions at that station to be changed from the transmitting to the receiving position at theinstant of arrival of signal impulses or just prior thereto. It is necessary that the cams 5 and 7 close 8 at approximately the same time as the corresponding cams at the distant station.
  • a friction drive 43 is placed between the distributor shaft 1 and the cam shaft 2, which carries on it a stop arm 44 arranged to prevent the rotation of shaft 2, without affecting shaft 1, when stop magnet 45 is energized and holds latch 46 in engagement with stop arm 44.
  • Stop magnet 45 is under the control of a polarized relay 47, arranged to be controlled by line impulses of low frequency transmitted by rotary selector keys 48 and 49 at either end of the line.
  • line is *u 'sediira generic sense to include cable and-theterm-1me timeis intended to designate the time required for a signal pulse to traverse the line or cable and reach 2.
  • control means including manu ally controlled automatic timing means at each terminal, whereby the length of said intervals may be varied.
  • control means including a line control relay to vary the connection of said line at intervals from said transmitting means to said receiving means and vice ⁇ ersa, said control means including constantly rotating synchronously operating timing means at the terminals, whereby the length of said intervals is determined.
  • control means including a line control relay to vary the connection of said line at intervals from said t'ansmitting means to said receiving means and vice versa, said control means including synchronously operating timing means at the terminals having a phase relation with respect to each other dependent upon the time required for a signal impulse to traverse the line.
  • Terminal apparatus for a transmission line comprising printing telegraph transmitting and receiving apparatus including constantly rotating distributors, means adapted to connect said transmitting and said receiving apparatus alternately to said line, comprising a switch and an intermittently closing circuit closer se arate from said distributor controlling sai switch, and a common motive means for constantly driving said circuit closer and the moving elements of said distributors.
  • Terminal apparatus for a transmission line comprising printing telegraph receivmg and transmitting apparatus including rotary distributors, a pair of relays for controlling the connection of said apparatus to the line, a second pair of rela s each controlling one and controlled by t ie' other one or said first mentioned pair of relays and conrelation of the line to the terminal trans mitters and receivers: the active transmitter from operative to inoperative, the active receiver from operative to inoperative at the instant the last of the transmitted signals is received, the inactive transmitter from inoperative to operative, and the inactive receiver from inoperative to operative at the instant the first of the transmitted signals arrives.
  • the method of simplex transmission which comprises automatically performing in sequence and at the end of intervals which are long in comparison to the line time, the following steps of changing the relation of the lineto the terminal transmitters and receivers, the intervals being longer for transmission in one direction than in the other: the active transmitter from operative to inoperative, the active receiver from operative to inoperative at the instant the last of the transmitted signals is received, the inactive transmitter from inoperative to operative, and the inactive receiver from inoperative to operative at the instant the first of the transmitted signal message train of waves arrives.
  • Means for controlling the connection of terminal transmitting and receiving apparatus to a transmission line comprising a circuit closer, a constantly moving means for periodically operating said circuit closer, a second circuit closer and constantly moving means for operating it periodic-ally at a period which bears a multiple relation to the period of said first mentioned circuit closing means, common driving means for said constantly moving means, and a relay responsive to impulses over said line for controlling said driving means 10.
  • the combination with a transmission line of transmitting and receiving apparatus at each terminal and means for controlling the connection of said transmitting and receiving apparatus to said line comprising a circuit at each terminal, a circuit closer therein, means for periodically closing said circuit closer, sources of positive and negative potential, and a circuit closer for alterna-tely including said sources of potential in said circuit, the intervals between the belays,
  • Terminal apparatus for a transmission line comprising a local circuit, a circuit closer in said circuit, means for periodically closing said circuit closer, sources of positive and negative potential, means for alternatcly including said sources of potential in circuit with said circuit closer, the intervals between the beginnings of the in clusionS of the one or the other of said sources of potential bearing a multiple relation to the period of closure of said circuit closer, a polarized relay, and additional circuit closing means for including said relay in said circuit.
  • the combination with a transmission line of terminal transmitting and receiving apparatus including synchronously operated distributors, means for periodically changing the electrical connection of said apparatus to said line whereby transmission takes place first in one direction and then in the other, a motor at each terminal for driving said distributors, electromagnetically driven tuning forks for controlling said motors, a resistance at each terminal adapted to be inserted in the electromagnet circuit, a relay adapted to cause the shortcircuiting of said resistance and controlled by incoming signals, a second relay adapted to shortcircuit said resistance, and means for causing operation of said last mentioned relay whenever the direction of transmission is changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
US592216A 1922-10-04 1922-10-04 Submarine telegraph system Expired - Lifetime US1601941A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US592216A US1601941A (en) 1922-10-04 1922-10-04 Submarine telegraph system
GB176/25A GB228828A (en) 1922-10-04 1923-08-02 Automatic switching arrangements for reversing the direction of traffic over a telegraph line or cable
DEE38109D DE513758C (de) 1922-10-04 1923-08-18 Telegraphieranlage mit periodischer automatischer Umschaltung der Verkehrsrichtung
FR570610D FR570610A (fr) 1922-10-04 1923-08-31 Perfectionnements dans les systèmes télégraphiques
NL31380A NL17867C (fr) 1922-10-04 1925-09-26
NL31379A NL17670C (fr) 1922-10-04 1925-09-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US592216A US1601941A (en) 1922-10-04 1922-10-04 Submarine telegraph system

Publications (1)

Publication Number Publication Date
US1601941A true US1601941A (en) 1926-10-05

Family

ID=9699746

Family Applications (1)

Application Number Title Priority Date Filing Date
US592216A Expired - Lifetime US1601941A (en) 1922-10-04 1922-10-04 Submarine telegraph system

Country Status (5)

Country Link
US (1) US1601941A (fr)
DE (1) DE513758C (fr)
FR (1) FR570610A (fr)
GB (1) GB228828A (fr)
NL (2) NL17867C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439398A (en) * 1944-02-25 1948-04-13 Bell Telephone Labor Inc Telegraph system provided with channel assurance and transmission regulation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748170C (de) * 1933-12-20 1944-10-27 Einrichtung zur UEbertragung von Nachrichten
US2487178A (en) * 1947-06-04 1949-11-08 Martha W C Potts Divided channel telegraph system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439398A (en) * 1944-02-25 1948-04-13 Bell Telephone Labor Inc Telegraph system provided with channel assurance and transmission regulation

Also Published As

Publication number Publication date
FR570610A (fr) 1924-05-05
DE513758C (de) 1930-12-03
NL17670C (fr) 1928-02-15
NL17867C (fr) 1928-04-16
GB228828A (en) 1925-02-02

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