US1674411A - Traffic-recording equipment for telephone systems - Google Patents

Traffic-recording equipment for telephone systems Download PDF

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Publication number
US1674411A
US1674411A US707419A US70741924A US1674411A US 1674411 A US1674411 A US 1674411A US 707419 A US707419 A US 707419A US 70741924 A US70741924 A US 70741924A US 1674411 A US1674411 A US 1674411A
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United States
Prior art keywords
relay
armature
recording
conductor
testing
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Expired - Lifetime
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US707419A
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English (en)
Inventor
John E Ostline
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Automatic Electric Inc
Original Assignee
Automatic Electric 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 Automatic Electric Inc filed Critical Automatic Electric Inc
Priority to US707419A priority Critical patent/US1674411A/en
Priority to US725539A priority patent/US1676742A/en
Priority to FR602524D priority patent/FR602524A/fr
Priority to FR31037D priority patent/FR31037E/fr
Application granted granted Critical
Publication of US1674411A publication Critical patent/US1674411A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks

Definitions

  • the present invention relates in general to traffic recording equipment for telephone systems, and is particularly concerned with the provision o appropriate equipment at a central point -for recording "traflic over trunk groups of a multi-ofiicetelephone system.
  • the chief object of the present invention is to provide traflic recording equipment which will accurately record the number of busy trunks of a group during agiven time.
  • Another object is to provide equipment for the above purpose, which may be economically manufactured, is entirely automatic in its operation, and which is very flexible in that it can be used in both automatic and manual systems.
  • Another object is to so design the above apparatus that the actual recording equipment can be placed in a centrally located oflice and all recording controlled thereat, thereby reducing the labor involved in taking and tabulating the observations to a minimum.
  • Figs. 1 to 3. when laid out with Fig. 2 immediately below Fig. '1, and 3 to the right of Fig. 2, show by means of the usual diagrams suflicient of the circuits and apparatus to enable the invention to -be readily understood.
  • V suflicient of the circuits and apparatus to enable the invention to -be readily understood.
  • Figs. 1 and 2 taken together show all of the equipmentin the recording oflice.
  • This equipment mainly consists of a register or recording apparatus R, a digit selecting switch DSS, and an ofiice selecting switc OSS.
  • the register R consists of a. three column motor driven printing type addingmachine arranged so that the usual key levers or as many of them as are'used, are operated by magnets. A machine which W1 I serve is.
  • the well known Burroughs in which keys corresponding. to the different digits of a number are epressed, followed by the de- PI'BSSlOIl of the starting or printing key, whereupon the number corresponding to the depressed keys is printed on a tape.
  • the circuit arrangement disclosed herein only the keys in the units and tens columns and the first five hundreds keys are used, in addition to the key for controlling 05 the printing action.
  • the five hundreds keys are used to indicate ofiicers while the tens and units keys indicate the number of connections, providin for recording a maximum of 99 connections "in anyone offive difierent offices.
  • the number 369 appearing on the tape would indicate 69 connections in office No. 3.
  • the switches DSS and 055s are of the usual and well known rotary type commonly used as individual line switches.
  • the switch DSS instead of having double wipers, has two sets of single wipers set at a 180 degree angle, one set engagin its'fi'rst set of bank contacts as the other set 'disengages its last set. In this manner a fifty contact switch is obtained.
  • the relays are for various switching operations which will be described hereinafter.
  • the keys comprising keys K to K are ofiice keys and are provided to enable. an attendant to disconnect the recording equipment from association with any office when desired. With these keys in normal position, traffic in all the offices is re-" corded. a record being made first of. the traffic in one office, then the next, and so on,
  • the cam 70 is constantly rotating at the rate of one rotation per- 'minute and is eifective when the key K is inoperated position to periodically cause the release of the recording equipment and to 'cause the ofiice selecting switch OSS to move its wipers into association with the trunk extending to the next oflice in which trafiic is to be recorded.
  • Fig. 3 shows the countin equipment of one ofiice ,(all other ofiices eing provided with like equipment), which consists of two counting switches CS and CS'. These switches are mechanicall DSS of Fig. 1. As wil be seen from the drawing, each of these switches has access to the release conductors of fifty trunk lines making a total of one hundred trunks which may be observed in a single oflice. The pur-' poses of the various relays in this figure will be fully described hereinafter.
  • relay 101 in oflice No. 1 Due to the high resistance of relay 101, relay 64 in the recording oifice does'not operate at this time.
  • Relay 101 in oflice No. 1 operates and at its armature 102 completes a circuit for the motor magnet 119 of the counting switch CS.
  • This circuit extends from grounded working contact of armature 102 and the said armature, armature 114: and its resting contact, wiper 121, resting contact of armature 116 and the said armature, armature 109 and its resting contact, armature 117 and its restingcontact, and the winding of motor magnet 119 to battery.
  • the operation of relay 101. also completes a circuit for slow releasing relay 107. This circuit extends from battery, resistance 110,
  • relay 107 is short circuited by ground on wiper 121 being extended by way of interrupter springs 120, resting contact of armature 115 and the said armature to the resistance 110.
  • interrupter springs 120 resting contact of armature 115 and the said armature to the resistance 110.
  • motor magnet 119 which extends from the grounded multipled bank contacts 130, wiper 121, resting contact of armature 116 and the said armature, armature 109 and its resting contact, armature 117 and its resting contact, and the winding of motor magnet 119 to battery.
  • the operation of motor magnet 119 again causes the short to be removed from slow relay 107, permitting this lay to be again energized to open the circuit of the motor magnet.
  • This armature upon operating, breaks a point in the originai operating circuit of magnet 119 and completes a shunt about the upper winding of relay 111.
  • relay 107 again operates and breaks the operating circuit of relay 105 and magnet 119.
  • Relay 105 deenergizes thereby removing ground from the lower terminal of the upper windingof relay 111.
  • Current now flows through both windings of relay 111 and this relay now operates its armatures 112, 113 and 115 to 117, inclusive.
  • armature 113 a circuit is prepared for relay 103, and at armatures 115 to 117 and their working contacts switch CS is substituted for switch CS.
  • the deenergizatirm of magnet 119 causes the wipers of switch CS to be moved another step into their initial starting posit-ion.
  • relay 107 since relay 111 is now operated, a circuit is completed for motor magnet 118 of the switch CS.
  • This circuit may be traced from battery, winding of the motor magnet 118, working contact of armature 117 and the said armature, resting contact of armature 109 and the said armature, armature 116 and its working contact, wiper 125 and its first bank con- I tact, working contact of armature 114 and takes its forty-ninth step the relay 105 again operates, this time in series with magnet 118 and, since armature 113 is in operated position, causes the operation ofrelay 103.
  • Relay 103 upon-operating, substitutes its low resistance locking winding for the high resistance relay 101.
  • Relay 101 .deenergizes and in so doin breaks the locking circuit of relay 111. his latter relay accordingly restores to normal. All equipmentat the No.
  • relay 103 1 office is nowin its orlginal position with the exception of relay 103.
  • the substitution of low wound relay 103 for relay 101 causes the current flow 1n the conductor 20 and in the relay 64 (Fig. 2) to be materially increased for a purpose which will subse quently be pointed out.
  • each of the fifty bank contacts of switch CS and OS are connected to the release-trunk conductor of a different trunk, it follows that Wipers 123 and 124 in travelling over their respective bank contacts, upon engaging grounded or busy release trunks, cause impulses to be transmitted back over conductor 132, resting cont-act of armature 112 and the said armature, armature 108 and its working contact to count conductor 129 extending to the recording equipment at the centralized oflice. wiper 73 (Fig. 2), and the winding of pulsing relay 51 to battery.
  • Relay 52 operates, at its armature 54 closes a point in the operating circuit of switching relay 18, and locks itself up over a circuit including both its windings and its armature 55 in series. It Will be seen that since the operating circuit of relay 18 must include wiper 15 and its first contact this relay cannot become energized "uniess the wiper 15 is moved fifty steps.
  • relay 18 if any number greater than 49 is to be registered relay 18 must be operated. For the purpose of illustration it will be assumed that, during the operation of switches CS and CS, fifty-five busy (grounded) trunks.
  • Relay 18 upon operating, locks itself up over a circuit extending from battery, lower winding of said relay, working contact and upper armature of said relay, conductor 39, resting contact of armature 68 and the said armature, conductor 29, and contacts of key K to grounded conductor 19.
  • Relay 18 upon operating the remainder of its armatures disconnects certain of the magnets of register R, used only when digits of less than fifty are to be registered, and connects up certain of the magnets, used only when digits of fifty or over are to be registered.
  • the circuit for tens magnet 5 may be traced from the grounded conductor 43, branch conductor 31, wiper 11 now standing on itsfifth bank contact, conductor 22, armature 27 and its working contact, conductor 28' and the winding of the tens magnet 5 to battery.
  • the circuit for the units magnet 5 may be traced from the grounded conductor 43, branch conductor 33, wiper 13, now standing on its fifth bank contact, conductor 26, and the winding of units magnet 5 to battery.
  • Relay 56 also, at its armature 59 closes a point in a restoring circuit for the switch DSS, and at springs controlled by armature 58 opens the energizing circuit of slow release relay 64 and relay 103.
  • This latter relay which is located in the No. 1 oflice, deenergizes, again connecting the relay 101 to the start conductor 20.
  • Relay 64 upon restoring, at its armature 65'removes ground from conductor 43, but this in no way affects the operated armatures of magnets of the register R since these armatures are mechanically locked in operated position until registration has taken place.
  • Relay 64 upon retracting its emur armature 63, opens the circuit of slow release relay 60, and at the back contact of the armature 63 completes a circuit for the motor start relay of the register R.
  • This circuit may ,be traced from grounded con-' ductor 29, armature 63 and its resting contact, working contact of armature 62 and the said armature, conductor 40, and the winding of motor start relay to battery. This circuit isopened a moment later when relay 60 retracts its armatures.
  • the construction of the register R is such that the armature of the register control magnet 2C and the armatures of the magnets are locked up when operated and are not unlocked until the motor of the register has caused the registering operation to be completed at which time the unlocking of the armature of the register control magnet takes place. It will therefore be seen that the opening of the circuit of this magnet in no way affects the registering operation.
  • Relay 60 upon retractlng its armature 61, completes a circuit for restoring switch DSS- to normal.
  • This circuit may be traced from grounded conductor 29, armature 61 and its resting contact, working contact of armature 59 and the said armature, conductor 37, to the multipled bank contacts associated with wi ers 15 and 16, in the present case by way 0 wiper -15, conductor 24, interrupter springs 23, and
  • Relay 66 upon operating, at its armatures 68 and 67 breaks the previously described holding circuit of relays 18, 52'and 56, and these relays accordingly restore to normal. Relay 66 also, at its armature 67 and its working contact, applies ground to. private conductor 37 of switch DSS, as soon as relay 56 restores its armature 59, but this has no efiect at this time as this switch is already at normal.
  • Magnet 69 upon energizing and again deenergizing", moves its wipers 71-74, inclusive, into engagement with their second bank contacts with which are associated the conductors extending to oflice No. 2 and the conductor extending to the ofiice magnet 2 of the register R.
  • Relay 66 upon restoring, now completes a circuit for the "slow acting relay 6 1 and the relay 101 of the second ofiice to be observed. This circuit extends from the grounded conductor 29, armature 67 and'its resting contact, through springs controlled by armature 58, winding of relay 64, wiper 72, now positioned on its second contact, and the start conductor 20' to the relay 101 located in the second oflice.
  • the operations which take place in the second ofi'ice and in the recording ofiice from now on will be similar to those hereinbefore described and therefore need not be repeated.
  • the switch OSS has no normal position and therefore its wipers remain on the contacts associated with conductors extending to the particular oflice which is being observed at the time the start key is restored, unless the wiper 71 happens to be on one of the bank contacts not utilized, which, as will be seen, is permanentl grounded, and in this case the switch SS will automatically rotate until the wiper 71 comes into engagement with the first bank contact with which an. ob- .served oflice is associated.
  • trunk groups from twenty-five ofiices may be handled.
  • a main office 'a branch oflice, a trunk line connecting said offices, a group of trunk lines in'the branch oflice, means for making said trunk lines busy, means in the branch office for testing the idle or busy condition of said trunk lines, means atthe main office controlled by said testing means to register the number of trunks found busy, a recording device at the main ofiice for recording the number set up on said register device, and a relay as sociated with said testing means operated only when all said trunks-have been tested for causing the operation of said recording device.
  • testing apparatus matically 0 erated to connect any branch ofiice therewith for a predetermined interval, testing apparatus at such branch ofiice for determining the number of trunks that are in use at one time, means at the main ofiice for initiating the operation of said testing apparatus, means in said testing apparatus for transmitting an impulse of current to the recordin apparatus each time a busy trunk is foun and means in said testing apparatus automatically 0 erated when all trunks associated therewiisi have been tested for causing a record to be printed at the recording ofilce.
  • a common registering device for connecting said registering device with said testing devices successivel and a recording device controlled by sai registering device each time the same is connected to a testing device.
  • a traiiic recorder a plurality of trunk or line testing devices, each comprising means for testing a group of trunks or lines, a registering device, and means for connecting said registering device to said testing devices successively.
  • a plurality of trunk or line testing devices each comprising means for testin a group of trunks or lines, a registering evice, means for connecting said registering device to said testing devices successively and means for automatically starting each testing device ,responsive to its being connected with registering device.
  • a trafiic recorder In a trafiic recorder, a plurality of trunk or line testing devices, each comprising means-for testin a group of trunks or lines, a regis'terin evice, means for connecting said registerin device to said testing devices successiv y, means for automatically starting each testing device responsive to its being connected with by said registering device, and means ineach testing device for setting said registe device.
  • a p urality of trunk or line testing devices each comprising means for testing a group of trunks or lines, a re istering evice, means for connecting sai registering device to said testing devices successively, means for automatically starting each testin device responsive to its being connected wit by said registering device, means in each testing device for setting said registering device, means for restoring the registerin device each time before it is cqnnected wit a difierent testing device, and a recording device controlled by said registerin device.
  • trunk lines located in different te ephone ofiices, testing equipment in each oflice for determining the busy or idle condition of the trimk lines therein, a plurality of supervising trunk lines connecting said oflices, respectively, with a common recording point, and means at said common recording point for starting the testing equipment in said oflices and fir recording the trailic conditions in the various grou s of said trunk lines by means of centre from said testing equiplllilgnt exercised over said supervising t 12.
  • a traflic recorder for use in recording the busy or idle conditions of lines in a telephone system, comprising means for automatically testing said lines, a printing device controlled w; said testing means and means fmeri 'cally repeating said test 'automati y.
  • a tra 0 recording stem for recording traflic in group to ephone lines, means for testing each 0 said mes and for recordin the bus condition of the tested lines, an means or preventing the testing of any group or groups of lines while permittin the preceding group or groups of lines to e tested.
  • a traific recorder for recording traflic conditions in grouped telephone lines, means for testing said groups of lines successively, and means automatically eflective between the testing of successive groups for recording the number of one of thqgroups.
  • a traflic reco er or recording trafiic conditions in grouped telephone lines means for testing said groups of lines successively, and means automatically effective between the testing of successive groups for recording the number of one of the groups and for recording the number of' lines that were busy in the last tested group.
  • an apparatus for testing the condition of each of a number of conductors means effective When'the apparatus has been started for-maintaining said apparatus in operation until all of the conductors have been tested and for then stopping the apparatus, and means for periodically restarting the apparatus.
  • an apparatus for testing the condition of each of a number of conductors means effective when the apparatus has been started for maintaining said apparatus'in operation until all of the conductors have been tested and for then stopping the apparatus, and means for periodically restartmg the apparatus, the interval between starting periods bein substantially greater than the testing perio i 19.
  • groups of trunk lines In a telephone system, groups of trunk lines, means for periodically determining the I bus or idle condition of all of the trunks in eac group in a definite group and trunk oring the busy or idle condition of the trunk v lines therein, supervisory trunk lines connecting said offices respectively with a common supervisin point, and means, at said common supervising point for starting the testingequipment in said offices and for indicating the traffic condition in thevarious groups of said trunk lines by means of control from said testing equipment exercised over said supervisory trunk lines.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Motor And Converter Starters (AREA)
US707419A 1924-04-18 1924-04-18 Traffic-recording equipment for telephone systems Expired - Lifetime US1674411A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US707419A US1674411A (en) 1924-04-18 1924-04-18 Traffic-recording equipment for telephone systems
US725539A US1676742A (en) 1924-04-18 1924-07-12 Traffic-recording equipment for telephone systems
FR602524D FR602524A (fr) 1924-04-18 1925-04-16 équipement enregistreur de trafic
FR31037D FR31037E (fr) 1924-04-18 1925-07-09 équipement enregistreur de trafic

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Application Number Priority Date Filing Date Title
US707419A US1674411A (en) 1924-04-18 1924-04-18 Traffic-recording equipment for telephone systems

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US1674411A true US1674411A (en) 1928-06-19

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US707419A Expired - Lifetime US1674411A (en) 1924-04-18 1924-04-18 Traffic-recording equipment for telephone systems
US725539A Expired - Lifetime US1676742A (en) 1924-04-18 1924-07-12 Traffic-recording equipment for telephone systems

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US725539A Expired - Lifetime US1676742A (en) 1924-04-18 1924-07-12 Traffic-recording equipment for telephone systems

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FR (2) FR602524A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421919A (en) * 1944-04-29 1947-06-10 American Telephone & Telegraph Telephone routing system
US2421834A (en) * 1942-09-12 1947-06-10 Ford Instr Co Inc Recording mechanism
DE1142913B (de) * 1959-04-18 1963-01-31 Automatic Switching Ltd Einrichtung zur Ermittlung der Verkehrs-staerke in Fernmeldeanlagen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478024A (en) * 1949-08-02 Workman s time recording system
US2688658A (en) * 1947-07-07 1954-09-07 Bell Telephone Labor Inc Call data recording telephone system
GB695351A (en) * 1949-03-15 1953-08-12 Standard Telephones Cables Ltd Improvements in or relating to automatic telephone systems
BE508368A (fr) * 1951-03-10
US2976365A (en) * 1954-09-10 1961-03-21 Bell Telephone Labor Inc Automatic telephone traffic recorder employing magnetic tape
US3158687A (en) * 1962-02-19 1964-11-24 Universal Controls Corp Recording traffic analyzer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421834A (en) * 1942-09-12 1947-06-10 Ford Instr Co Inc Recording mechanism
US2421919A (en) * 1944-04-29 1947-06-10 American Telephone & Telegraph Telephone routing system
DE1142913B (de) * 1959-04-18 1963-01-31 Automatic Switching Ltd Einrichtung zur Ermittlung der Verkehrs-staerke in Fernmeldeanlagen

Also Published As

Publication number Publication date
FR31037E (fr) 1926-11-20
US1676742A (en) 1928-07-10
FR602524A (fr) 1926-03-20

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