US1829774A - Automatic or semiautomatic telephone system - Google Patents

Automatic or semiautomatic telephone system Download PDF

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Publication number
US1829774A
US1829774A US455637A US45563730A US1829774A US 1829774 A US1829774 A US 1829774A US 455637 A US455637 A US 455637A US 45563730 A US45563730 A US 45563730A US 1829774 A US1829774 A US 1829774A
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United States
Prior art keywords
relay
switch
circuit
path
switches
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
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US455637A
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English (en)
Inventor
Wright Esmond Philip Goodwin
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
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Publication of US1829774A publication Critical patent/US1829774A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Definitions

  • the main feature of the'invention com prisesfa circuit ,arrangementfor an autosystem comprising selector switches, characterized in this,,that discriminatmg means is provided which is associated in common: I Wit-ha plurality of said switches andwhlch is adapted to be o'perated variably in ac wcordance with the path. ofaccess .used
  • the control circuit comprises two switches,-
  • FIG. 2 shows a selectorf'stageconnected to one of a plurality of final stages each com- 59, pri singtwo groupsjofgswitc'hes"in parallel.
  • Thefcontrol.or bye-path circuit associatedjlwith 2A is taken into use from the R2 or selector. switch of 11A or- 1B, and relay A alone or relays Aland Dare operated, Re
  • outlets from R2 may be any desired five only inj banks 9 and ⁇ marking pur'posesr,
  • lay G is of high resistance and slow to operate, and consequently a time period pro
  • relay M prevents R2 taking any further steps. If one of the outlets searched over 'by the'wi'per T1 is free,'relay P will be operated from "battery in the succeeding bye-pass switch over bank contact and iper T1,e9, P, g5, $65 to ground'] at wi i s relay Relay P closes'the circuit for the relay H' at opens the circuit of relay Pand places a ground potential from contact 7L8 opens the, and contacts b5 aud t/t6 prepare a marking circuit for the 4 conversationalswitch- Contacts he close an irnpulisi'ng circuit to the succeeding bye-pass,
  • contact h3- provides a'locking circuit for therelayH to earth at 62
  • contact Z712 opens the operating circuit of'relay G andcontact 7L1 opens'the localimpulsingcircuit. If one of the outlet-ssearched over by the Wiper T2 was foundgto' be free relay Q would have operated'in asimilar manner, J over the obvious circuit and relay Hover contacts jlfg'l, p1.
  • Relay J provides a Wi er ⁇ discrimination j and when operated the orward ilnpulsingcircuitand the marking cir set'of contacts. I'f'relays P and Q operate there. will beno circuit for operating relay switched over to the required relay J andrelay 'H will operate alone. It
  • relay T will'take pl Whichhas been predetermined. As already “explained the ground potential is placed on the hold conductor which is extended over the obvious circuit for the relay TB and closes a locking circuit throughv contacts t1, $163 a'ndbQ .toground.” Thcrelease of relay.
  • interrupter springs,- contacts "ealg g(43, ta2 'maQ- to gro'undfuntil-it reaches the conversational switchindicated 'by a ground potentialfon the hold conductorflylhis cir-I cuit niaybe traced from battery, right hand" J winding of the relay TA, non-inductive resist'ance; wiper and bank l ofthe switch HA1, V
  • Relay TA locks up over its second windin g 'tm; to ground at ba /2.
  • the relay" TAR also closes thefollowing circuit for the final selector switch SA'through' its interruptersprings, bank contact and wiper 6 of the" switch RA1, -h a4,;;m2,-ma2to ground.
  • Theswitch-SA has access to all thei'lines tested by 3A2 and the contacts correspond ing to the salnelinein bank M of SA and" banks" M1, M2, of HA2 are 1 connected by marking "contacts
  • a telephone system co;mprising a group ofconversational switches, a plurality ofdifferen't paths over which each of said switches is accessible, and discriminating means common to said: group of switches adapted to be by series connected to any one of saidswitches in re sponse to the initiation of a call thereover, to be operated in accordan'cewith the path over I *hich the callis made and to be released upon establishment of the call.
  • a telephonesystem comprising a group ersational switches, adapted to be set t in1pulses,a plurality of paths over W111i Ch eac of said switches is accessible, and discriminatii gl m comm to S group of switches adista w be @Qnnected t e one of said ggrr response to the initiation of a call stems n to e operated I prior to the receipt of sais se of lmpulsesi in accordance with the patltQffi-t lvblch the call is made.
  • a selector stage comprising conversational switches'and a pluralityof sociated in common with a pluralityofcom versation switches and comprises a 'marking -switch and'a bye-path switch havinga plu- .rality of sets of wipers, a plurality of paths of accessxtosaid selectorstage, discriminatmeans'in thebye-path control circuits b -path control circuit's'each of which is-as-' which-are adapted to be operated in accordance with the path of access over which the control circuit istaken into use and wiper switchingmeans which is adapted to select one of said sets of wipers in accordance with the setting of said discriminating means.
  • each-bye path switch comprises a plurality of pairs of test wipers one of which is adapted to be selected in accordance with the setting of the discriminating means and further wiper switchingv means which is adapted to be operated in accordance with the odd oreven value of a digit received by said marking switch to select one of said pairs of test wipers.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Electronic Switches (AREA)
US455637A 1929-06-05 1930-05-26 Automatic or semiautomatic telephone system Expired - Lifetime US1829774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17254/29A GB334578A (en) 1929-06-05 1929-06-05 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
US1829774A true US1829774A (en) 1931-11-03

Family

ID=10091956

Family Applications (1)

Application Number Title Priority Date Filing Date
US455637A Expired - Lifetime US1829774A (en) 1929-06-05 1930-05-26 Automatic or semiautomatic telephone system

Country Status (4)

Country Link
US (1) US1829774A (fr)
DE (1) DE571976C (fr)
FR (1) FR693974A (fr)
GB (1) GB334578A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597007A (en) * 1942-03-31 1952-05-20 Int Standard Electric Corp Common control circuit for operating switches rearward to calling line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597007A (en) * 1942-03-31 1952-05-20 Int Standard Electric Corp Common control circuit for operating switches rearward to calling line

Also Published As

Publication number Publication date
GB334578A (en) 1930-09-05
DE571976C (de) 1933-03-10
FR693974A (fr) 1930-11-27

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