US1586971A - Signaling system - Google Patents

Signaling system Download PDF

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Publication number
US1586971A
US1586971A US732900A US73290024A US1586971A US 1586971 A US1586971 A US 1586971A US 732900 A US732900 A US 732900A US 73290024 A US73290024 A US 73290024A US 1586971 A US1586971 A US 1586971A
Authority
US
United States
Prior art keywords
cable
sending
receiving
circuit
amplifier
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
US732900A
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English (en)
Inventor
Austen M Curtis
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
Priority to NL17303D priority Critical patent/NL17303C/xx
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US732900A priority patent/US1586971A/en
Priority to DEI25509D priority patent/DE484764C/de
Application granted granted Critical
Publication of US1586971A publication Critical patent/US1586971A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude
    • 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

  • the relayai'iiiature 30, when in' engageother thus providingltime for the vdraining nient with the 'contactl is'lzidapted to place' of the greater portion ot' the cl'ia'i'ge absorbed a short-circuit across the primary Winding 'by the cable (E lhe relay which controls the andadded'priinnry resistance of the .auto Shop@ ciu-uitingv of' the' mnplifgr' is 50 arf tlllSfOllHeI DOSODed bGWCII ilRHlt ranged that. thearmature.remains'in whatand second stages oi the aniplifienv There.
  • z e 1.
  • a signaling system comprising a cable, a sending' mechanism and' a receiving; ⁇ mechanism having an amplifier associated therewith, means for preventing excessive current impulses at the time of completing the circuit between the receiving mechanism and the. cable.
  • a signaling system comprising a cable, a sending mechanism and a receiving 'mechanism having an amplilier associated therewith, means for bridging a low impedance circuit across the amplifier to prevent excessive currentimpulses at the time ot connecting the receiving; apparatus to the cable.
  • a signaling system comprising' a cable, a sending mechanism and a receivingy mechanism having an amplifier associated therewith, an electromagnetic device operable during the time of connecting ⁇ 'the ainplifier and receiving mechanism to the line for short-circuiting the ampliiier.
  • a signaling system comprising a cable, a sending mechanism, a receivingV mecln anism having an amplifier associated therewith and a switching mechanism for alternately connecting the sending mechanism and the receiving mechanism with its associated amplifier te the cable, an electromagnetic device under the control of said switching mechanism for protecting the amplifier and receiving mechanism from excessive cur- .reiit impulses occurring during the operation of the switchingmechanism.
  • an electre9v magnetic device under the control of said switi'hlng iiiecliziiiisni for connecting a bridging circuit across lhc aiiipliliei' to i'ii'event the flow of eXcessire rnrreiit inipiilses therethroiigl'h during' the switching' operations.
  • a sioiialiiie' system comprising' a. cable, a #cociner mechanism. a receiving mechanism having an anipliicr associated therewith and a switching' mechanism for alternately connmtiifey thc sending i'nechaiiisin and the receivingA mechanism with its associated anipliliei lo the cable. an electromagnetic device aiiton'iaticail ⁇ r ontrtdled by the switching' n'icclianisni to short circuit the amplifier at the instant the cable is connected thereto.
  • a signaling?r system a cable, a sending' mechanism, a receiving mechanism liavl ingr anvanipliier associated therewith, a switchingv mechanism ici' alternately con ncctingg thc sending' and 'receiving nicchanisnis to thc cable, and means Under the conirol oi' the switching; mechanism 'for rendering the amplifier inoperative at the instant the cable is connected thereto.
  • switching mechanism operable at the end of the sending' period for disconnecting t" c cable from the transmitting mechanism and connecting it to earth for a short interi/al before connecting it to ti e receiving mechanism, and means automat' ll;y operated by the switching mechanism 'tor short circuiting the amplii'ier until after the cable is 1 connected thereto.
  • a signaling system comprising, a. cable, a Sending mechanism, rcceiviiiff lill) mec'hanisi., a multistage'amplifier associated with said receiving, mechanism, and means for connecting short-circuit across said ainpliiicr to 'preventexcessive current celvmg mechanism to the cable.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Accessories (AREA)
US732900A 1924-08-19 1924-08-19 Signaling system Expired - Lifetime US1586971A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL17303D NL17303C (enrdf_load_stackoverflow) 1924-08-19
US732900A US1586971A (en) 1924-08-19 1924-08-19 Signaling system
DEI25509D DE484764C (de) 1924-08-19 1924-12-14 UEbertragungsvorrichtung zum abwechselnden Senden und Empfangen von Stromstoessen, insbesondere fuer die Telegraphie ueber lange Kabel, unter Benutzung von Empfangsverstaerkern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US732900A US1586971A (en) 1924-08-19 1924-08-19 Signaling system

Publications (1)

Publication Number Publication Date
US1586971A true US1586971A (en) 1926-06-01

Family

ID=24945384

Family Applications (1)

Application Number Title Priority Date Filing Date
US732900A Expired - Lifetime US1586971A (en) 1924-08-19 1924-08-19 Signaling system

Country Status (2)

Country Link
US (1) US1586971A (enrdf_load_stackoverflow)
NL (1) NL17303C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL17303C (enrdf_load_stackoverflow)

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