US1116539A

US1116539A - Telephone-exchange system.

Info

Publication number: US1116539A
Application number: US7094271?A
Authority: US
Inventors: Morton L Johnson
Original assignee: COOK FRANK B CO
Current assignee: FRANK B COOK Co; COOK FRANK B CO
Publication date: 1914-11-10
Anticipated expiration: 1931-11-10

Description

M. L. JOHNSON.

TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED JULY 15, 1912. 1,1 1 6,539, Patented Nov. 10, 1914 3 SHEETS-SHBET 1.

zortmom wuotxuwmo NNTCIOZIQ OF TNV ENTO'R F 1 MORTON L.J0HN50N AT TORNEY M. L. JOHNSON.

TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED JULY 15, 1912.

Patented Nov. 10, 1914.

3 SHBETS-SHEBT 2.

WITNE S51E15 INYENTOR MORTON L.1IOHNSON ATTORNEY Mu L. JOHNSON.

TELEPHONE EXCHANGE SYSTEM.

APPLIGATION FILED JULY 15, 1912.

1 1 1 6,539. Patented Nov. 10, 1914.

3 SHEETS-SHBET 3.

FIG. 3

WITNES SE5 INVENTOR.

W 7% T L.1To1-1N$ON ATTORN EY' Tns PATENT FFIOE.

neuron L. rormsoit, or cmcnuo, rnLInoIS, Assisnoa, :ev nnsnn ASSIGNMENTS, are

FRANK B; COOK COMPANY, OF GHICAGO,

ILnIuois, n conronerrou or rnnrnoxs.

raises,

To all whom it may concem;

Be it known that l, Monron lb. Jonnson, citizen ot the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Telephone-Enchange Systems, oi? which the tollowing is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates, in the most important embodiment thereot, to telephone exchange systems and has for one oi its ob jects the provision of means whereby the numbers or designations of desired lines announced by calling subscribers or stations may be automatically repeated to the call ing parties whereby operators may not be delayed in establishing connections between calling and desired lines as they were hitherto when the operators would check up the numbers or designations of the desired lines or line extensions by repeating these numhere or designations back to the calling parties and receiving the calling parties ailirmation or correction. By means of this feature of my invention the calling party may interrupt the establishment of connection with another line or line extension if the automatically repeated number is incorrect. While this feature of my invention is of particular service in repeating the numbers of desired lines to calling subscribers it is obviously otiadvantage in repeating the numbers or designations of desired lines or line extensions to the party (subscriber or operator) at any station seeking the connection of a desired line with the line extension from such station and the invention is therefore not to be limited to its adaptation to subscribers telephone lines.

My invention, in another of its aspects, finds an embodiment in a telephone ex change svstem employing operator controlled electromagnetic switches for ex tending lines and in which circuit controlling or interrupting switching devices are emploved by the operator for operating the switching mechanism to select the extension according to the number or designation of the wanted extension. I associate additional switching devices with the aforesaid operator actuated switching devices wherebv the number or designation of the wanted extension is automatically spoken Specification of Letters Patent.

Application filed July 15;

Patented Nov. 10, 1914. 1913. Serial No. water.

and telephonically transmitted and I desire to claim this feature of the invention broadly irrespective of the station or stations that are reached by the telephonic current that thus serves automatically to re peat the numbers of the desired telephone line extension.

In practising'the invention I employ a plurality of talking devices each capable of speaking the number of a character, reference or numeral, according to the nature of the designation, where the invention is embodied. in a telephone exchange system, though I believe it to be broadly new with me to provide a plurality of talking devices having records ot'difl'eringimport and means for causing said talking devices to speak in arbitrarily determined order. These talking devices are selectivelyassociated with the line in the order and to the extent corresponding to the designation of the desired extension, and this feature of the invention ll consider to be broadly new as well as the above described features of the invention. in order to avoid a separate operation for this purpose in those systems in which operator actuated circuit controlling devices are employed for extending telephone lines, these circuit controlling devices may be mechanically co-related with the aforesaid additional switching devices so that when the telephone line is extended the designation of the extension is automatically telephonically transmitted.

I will explain my invention more fully by reference to the accompanying drawings showing one embodiment thereof to which the invention obviously is not to be limited and in which drawings- Figures 1, 2 and 3, taken collectively in numerical order, represent a telephone exchange system equipped inaccordance with the invention.

In the drawings I have shown my inven tion as being embodied in a system coming within the scope of the application of Elmer R. Corwin, Serial No. 503.345,,filed June 21, 1909, though of course the invention is not to be restricted to such a system. I have illustrated two subscribers stations (numbered for the sake of illustration as 231v and each having well known equipment that includes a telephone receiver switch hook I that engages a normal phone receiver 2 for the purpose of includcontact when support ng the associate tc e ing a signal hell 3 and a Condenser 4: in bridge of the associate telephone line, each switch hook having an alternate contact engaged thereby when free of the telephone receiver to establish a metallic bridge between the sides of the associate line through the telephone receiver and transmitter 5.

\Vhen a subscriber, say at station 231, de sires communication with another subscriber, say station 345, the calling subscriber will remove his telephone receiver from its switch hook and metallically connect the line sides at his station whereby a circuit is established which may be traced from the upper grounded coil of the line relay 6, the upper intermediate armature switch of the switching relay 7 and its normal contact, the upper armature switch of the cutoff relay 8 and its normal contact, one side of the calling line, the telephone bridge of the calling line, the other side of the calling line, the lower armature switch of cutoff relay 8 and its normal contact. the lower intermediate armature switch of relay 7 and its normal contact, the lower coil of the relay 6 to the grounded battery 9. The armature switches of relay 6 are now attracted. A circuit is established which may be traced from the lower grounded armature switch of relay 6 and its alternate contact, the sluggishly operating interrupter relay 10, the motor magnet 11, the side switch wiper 12 in its first position, to the grounded common battery 9. The motor magnet 11. thereupon steps the wipers 13, 1 15, 16, 17 and 18 around until the wiper 15 encounters an ungrounded waiting contact whereupon the private relay 19 (which was previously included in circuit upon the initial operationlof the motor magnet 11) is deenergized to cause the side switch wipers 12 and 20 to be moved to their second positions, the wiper 12 in its second position opening the circuit of the motor 11 to arrest the wipers 13 to 18, inclusive. lVhen the wiper 20 is in its second position it engages a grounded contact to ground the wiper 15 and the contact then engaged thereby and the other contacts of the other switches in multiple with the contact then engaged by the wiper 15 so that the wipers of other switches cannot stop with the wipers 15 thereof in engagement with the contacts in multiple with the grounded wiper 15 whereby other calling lines can not become electrically connected or associated with those waiting contacts which have been appropriated by the wipers of aswitch of a calling line, it being understood that the waiting contacts of each of. the wipers 13 to 18:inclusive, are in multiple connection with the waiting contacts of similar wipers of other selector switches, in the system illustrated.

in the system illustrated the selector switches are shown as being individual to the lines though the invention is not to be thus restricted, nor, in fact, is the invention to be restricted to systems which employ selector switches. When the wipers of the selector switch actuated by a calling subscriber have been brought to rest with the wiper 15 in engagement with an ungrounded waiting contact, the calling line is automatically extended into connection, the telephone conductors leading to a telephone outfit at the position of an idle op erator, it being understood that the telephone conductors leading from several operators positions are provided with multiply related terminals that are distributed among the selectorswitches whereby calling subscribers may automatically select the telehone conductors leading to idle operators. The selector switches may therefore be termed operator selector switches. The wipers 13 and 14 of the actuated operator selector switch are shown as being ones that are serially included in the telephonic circuit extending between the calling subscriber and the operators telephone equip ment 21, which equipeinent was selected because it was free for selection, and which cannot be selected while still in connection with the calling subscribers line owing to a grounding of the contact then engaged by the wiper 15 of the employed selector switch. The calling party now informs the operator of the number or designation of the desired line and the operator proceeds to the operation of switching devices for selecting the desired line and causing its connection with the calling line.

Assuming as the drawings show, that the stations to be connected are subscribers stations, then the switching devices which the" operator employs are provided with numerical designations to guide the operators. As the system is illustrated, each telephone line is provided with a selector switch such as is illustrated at A, and which becomes connected'with the calling line in a later stageof the process of connecting calling and called lines. This selector switch A is employed for selecting an idle connector switch B which in turn is operated to connect with a desired line. The system shown is adapted to nine hundred lines, though the equipment may obviously be modified to vary the number to which the equipment is adapted, and .the operators are, in the present case, each individually provided with three groups of switchingydevices or buttons arranged, as illustrated, in' three vertical rows, ten buttons to a row, the but tons in each row being numbered, consecutively from the top down, 1,2, 3, a, 5, 6, 7, 8, 9, 0. The buttons in the first vertical row C (readin from the left to the right) are employed orselecting the particular hundred hundred lines in which the desired line is included, the inter-relation of desired lines and connector switches being similar to that in which obtains in ordinary automatic telephone exchange practice. The buttons in the second vertical row D are employed for bringing the wipers of the selected idle connector switch to that level of tens in which the waiting contacts of the desired line are included. The buttons in the third vertical row- E are employed for moving the wipers of the selected connector switch in their selected level into engagement with the contacts of the desired line in such level.

Assuming that station 345 is the wanted station, the operator will depress the third button from the top in the first vertical row (1,.the fourth button from the top in the second vertical row D, and the fifth button from the top in the third vertical row E, the buttons in each row being numbered from the top to the bottom successively, whereafter the operator will depress the starting key 22, the previously depressed buttons remaining depressed (though the key 22 is released immediately after its operation) for a sufficient period of time to permit the operation of the selector switch A the full operation of the selector switch B whereaiter the buttons are released. Mechanical means may be employed for this purpose but as such forms no novel part of my present invention it have not illustrated the same.

When the starting key is depressed, a circuit, which is very apparent, is established through the relay 23, this relay 23.

establishing a locking circuit through itself in order that key 22 may be released, which locking circuit includes the winding of relay 23, its left handar 'nature switch and the left hand armature switch of relay 2L. The right hand armature switches of relay 23 are attracted, the two switches upon the extreme right opening the circuit of the selected operators telephone while the remaining right hand armature switch of relay 23 establishes a circuit fraction which may be traced from the grounded common battery 9 through this remaining right hand arnmture switch and its contact, the winding of a relay 25, the left hand armature switch of such relay, the normal follow up contact of such-armature switch to the starting brush 26. The brush 26 is electrically connected with a disk 27 once in each'revolution of suchdisk, this disk having a finger 28 adapted for contact of limited duration with the brush-26. The disk 27 is grounded and may occupy'approximately a second of time for asingle revolution, the disk being mounted upon a shaft 29 that is constantly driven by a motor 30, there being speed reduction gearing 31 interposed between the motor and the shaft. When the brush 26 is grounded upon engagement of the finger 28 circuit for the relay 25 which was partially traced is now completed whereupon the left hand armature switch of such relay engages its alternate grounded contact to lock the circuit for the relay when the finger 28 has passed out of engagement with the brush 26. The intermediate armature switch of the now energized relay 25 establishes a circuit which may be traced from its grounded contact, through said armature switch, the left hand armature switch of relay 32, the winding of relay 33, to the grounded battery 9. The intermediate armature switch of the now energized relay 33 completes the circuit previously partially established by the'third button from the top of the left hand vertical row of switching buttons. This circuit may be traced from the disk 3i which has three fingers 35 and which disk is grounded, the brush 36 when engaging a finger 35, the depressed key in row C, the intermediate armature switch of relay 33, the relay 37, to the grounded battery 9. The relay 37 is thus energized three times for the purpose of selecting an idle connector switch B of the group of ten connector switches belonging to the group of one hundred telephone lines containing the desired line which is in the three hundred group. The armature switch of relay 37 is thus caused to leave its contact three times so that the relay 38 is operated three times to cause the wipers of the selector switch A to engage those waiting contacts that are individual to an idle connector switch in the desired group in accordance with ordinary automatic telephone exchange practice as is exemplified by British patent 1298 of 1910, the selector and connector switches having mechanical features which are set forth in Van Deventers Telephonology page 530. The circuit that includes the armature switch of relay 3'! also includes the two lower armature switches of relay 39, this relay having been included in circuit when the side switch. wiper 12 was put into second position.

I do not deem it necessary to describe in detail the operation of the selector switch A and the connector switch B as such are so well understood by those skilled in the art.

While an idle connector switch of the' graphic record being mounted upon a disk that is fixed upon the shaft 29 and extending throughout a portion of the periphery of such disk.

The phonographic needle is suggested at 41 and the sound conveying phonographic horn is indicated at 42, it being unnecessary further to describe the construction of the ordinary phonograph which may be used. The horn 42 is opposed to a telephone transmitter-.43 that is included in a local primary circuit. The circuit which is. secondary to this transmitter circuit may be traced from the grounded secondary coil 44;, the left hand switch of the third key from the top of the left hand row, the left hand armature switch of relay 33, the primary coil 45, to ground. The primary coil 45 is provided with a secondary 4L6 in bridge of the two right hand armature switches of relay 23 which are connected with waiting contacts for the wipers 13 and 14 whereby the secondary coil 46 is included in bridge of the calling line while the wipers of the actuated operator selector switch are still in the position to which they were moved in order to connect the operators telephone 21 with the calling line, this operators telephone being now out of circuit owing to the energization of the relay 23. By means of the elements 45 and 4:6 and the circuits provided therefor which have been traced, the calling subscriber hears the number 3. After the connector switch has been selected and the calling subscriber has heard the number three the finger 4.7 is brought into engagement with a brush ,49 that is connected with the left hand follow-up contact of the relay 32 whereby said relay is energized, the left hand switch of this relay 32 engaging its alternate grounded contact to close a locking circuit therethrough, this locking circuit being traceable from the grounded alternate contact of the left hand armature switch of'relay 32, said armature switch, said relay, the right hand armature switch of relay 25 and its then engaged contact, to the grounded battery 9. When the relay is energized, circuit which was previously established through the relay 33 is broken whereby the armature switches of the previously energized relay 33 are restored to normal, so that the talking circuit through the primary 45 is broken at the left hand armature switch of such relay 33 and the circuit of magnet 37 is broken at the intermediate armature switch of such relay 33. WVhen the relay 33 was energized its right hand grounded armature switch, by engaging its alternate contact, established a circuit through the sluggishly operating relay 50, this relay 50 being sufiiciently sluggish to permit of the momentary establishment of a circuit, upon the dee'nergization of relay 33, which may be traced from the grounded right hand armature switch of relay 33, the normal contact of such switch, the switch of the sluggishly operating relay 50, the normal follow-up contact of the left hand armature switch of relay 51, the first of the right hand armature switches of relay 23 and its then engaged contact, to the grounded battery 9. Subsequent to the energization of relay 51, relay 50 releases its armature switch but a circuit for the relay 51 has, in the meantime, been'established, which circuit may be traced from the grounded alternate contact of the left hand armature switch of relay 51 through the first of the right hand armature switches of relay 23, to the grounded battery 9. The intermediate armature switch of relay 51 has now established a circuit which may be traced from the grounded contact of said armature switch, said armature switch, the right hand armature switch of relay 52 and itsthen engaged contact, the relay 53, to the grounded battery 9. The intermediate armature switch of relay 53 thereupon completes a circuit which may be traced from the grounded battery 9, through the relay 37, said intermediate armature switch of relay 53 and its then engaged contact, the two right hand contacts of the fourth key from the top of the second Vertical row D of keys, the brush 5-1 and the grounded disk 55 when its four fingers 56 are brought, successively, into engagement with the brush 54 whereby the circuit of the relay 37 is interrupted four times and the circuit of the line relay 5'? of the selected connector switch is interrupted four times whereby the

wipers

58, 59 and 60 of the selected connector switch are raised to the fourth level to have access to the waiting contacts in the bank of such contacts that includes the waiting contacts of the desired line, all in a manner which is well understood by those skilled in the art. lVhile the wipers of the selected. connector switch are being thus raised to the proper level another talking device is in process of being telephonically related to the calling line, the talking device being constructed to speak the number (4) corresponding to the number of the level to which the wipers of the selected connector have been raised. The talking device may include a phonographic record 58 capable of reproducing the word four, this phonographic record being mounted upon a disk that is fixed to the shaft 29 and extending throughout a portion of the periphery of such disk.

The phonographic needle is indicatedat 59 and the sound conveying phonographic horn is indicated at 60. The horn is opposed to a telephone transmitter 61 that is included in a local primary circuit. The circuit which is secondary to this transmitter circuit may be traced from the grounded secondary coil 62, the left hand switch of the fourth key from the top of the intermediate vertical row D, the left hand armature switch of relay 53, the primary coil 45, to ground. The automatically spoken number a. is thus telephonically conveyed to the calling subscriber in the manner which was previously described. After the wipers of the selected connector switch have been raised to the desired level and the calling subscriber has heard the number 4:, the finger 47 of the grounded disk 48 is brought into engagement with a brush 49 that is connected with the left hand followup contact of the relay 52 whereby said relay is energized, the left hand switch of this relay 52 engaging}; its alternate grounded contact to close a locking circuit therethro-ugh, this locking circuit being traceable ilr'om the e'rounded alternate contact oi the left hand armature switch oi' relay 52, said armature switch, said relay, the right hand armature switch of relay 51 and its then engaged contact, to the grounded battery 9. When the relay 52 is energized, circuit which was previously established through the relay is broken whereby the armature switches of the previously energized relay are restored to normal, so that the talking circuit through the primary is broken at the left hand armature switch of relay 53 and the circuit of magnet 3'7 is broken at the intermediate armature switch of such relay 53. When the relay was energized its right hand ground armature switch, by engaging its alternate contact, established a circuit through the sluggishly operating relay 68. this relay 63 being sutliciently sluggish if permit the momentary establishment of a circuit, upon the deenergization of the relay 58, which may be traced from the grounded right hand armature switch of relay 53, the annual contact of such relay, the switch of the sluggishly operating relay 63, the normal follow-up contact of the left hand armature switch of relay 64, the firstbf the right hand armature switches of relay 23 and its then engaged contact to the grounded battery 9. Subsequent to the energization of the relay 64, relay 63 releases its armature switch but a circuit forthe relay 64 has in the meantime been established which circuit may be traced from the grounded alternate contact of the left hand armature switch of relay64 through the first of the right hand armature switches of relay 23, to the grounded battery 9. The intermediate armature switch of relay 64 has now established a circuit which may be traced from the grounded contact of said armature switch and such switch, the right hand armature switch of relay 65 and its then engaged contact, the relay 66 to the grounded battery 9. The intermediate armature switch of relay 66 thereupon completes a circuit which may be traced from the grounded battery 9, through the relav 37, said intermediate armature switch of relay 66 and its then engaged contact, the two right hand contacts of the fifth key from the top of the third vertical row E of keys, the brush 67, the groundeddisk 68 when its live fingers 69 are brought, successively, into engagement with the brush 67 whereby the circuit of the relay 3'? is interrupted five times, the circuit of the line relay 57 of the selected connector switch is interrupted five times and whereby the wipers 5-8, 59 and 60 are stepped 1 around by the rotary magnet 70 into engage- -ment with the waiting contacts of the dcisired line, all in a manner which is well. understood by those skilled in the art. j-While the wipers of the selected connector SWliIClfi are being thus stepped around to iengagie the contacts of the desired line an- Etelep-honically related to the calling line,

other talking device is in process of being the talking device being constructed .to speak the number (5) corresponding to the last 1 digit in the number oi the called line. The f talking" device may include the phonolaraphic record 71 capable of reproducing the word five, this phonographicrecord being mounted upon a dish that is fined to fhe shaft 29 and extending throuqhout a oortion of the periphery of such disk. The nhono rraphic needle is suggested at 72 and the sound conveying phonon'raphic horn is indicated at 73. The born 73 is opposed to in a local primary circuit.

a. telephone transmitter 74 that is included The circuit which is secondary to this transmitter circuit may be traced from the grounded secondary coil 75, the left hand switch of the .fi'fth key from the top of theright hand "ertical row the left hand armature switch of relay 66, the primary coil 45., to

, around.

'ihe automatically spoken number five is: thus telephonically conveved to the icallinpg subscriber in the manner which was iprcviouslv described. After the wipers of j the selected connector switch have been I stepped around to engagement with the contacts of the called line and the calling subiscriber has heard the number five, the j finger 47 of the grounded'disk L8 is brought into engagement with a brush 49 thatis connected with; the left hand follow up contact of the relay 65 whereby said relay is energized, the left hand switch of this relay 65 engaging its alternate groundedcontact to close a locking circuit theretbrough, this locking circuit being traceable from the grounded alternate contact oi the left hand armature ture switches of the previously energized relay 66 are restored to normal, so that the talking circuit through the primary 45 is broken at the left hand armature switch of relay 66 and the circuit of magnet 87 is broken at the intermediate armature switch of such relay 66. When the relay 66 was energized its right hand grounded armature switch, by engaging its alternate contact, established a circuit through the sluggishly operating relay 76, this relay 76 being sufficiently sluggish to permit the momentary establishment of a circuit, upon the deenergization of the relay 66, which may be traced from the grounded right hand armature switch of. relay 66, the normal contact of such relay, the switch of the sluggishly operating relay [6, the relay 24c, to the grounded battery 9. The relay 24 is now energized to open the locking circuit of the relay 23 at the left hand armature switch of relay 24: whereby circuit for the

relays

25, 32, 51, 52, 64, and 65 are opened. The apparatus associated with the talking devices and the impulse devices are now restored to normal. When the relay 24: is energized its right hand armature switch establishes a circuit which may be traced from the grounded battery 9, through said armature switch and its then engaged contact, the wiper 16, the upper armature switch of relay 39 and its then engaged contact, the relay 7 of the operator selector switch that was employed by the calling subscriber for selecting an idle operator, the side switch wiper 77 of the selector switch A when said side switch wiper is'in its third or uppermost position, private or guarding wiper 78 of said switch, the guarding conductor 79, the upper armature switch of sluggishly operating relay 80 that is controlled by the line relay 57, to the grounded contact of such armature switch. When relay 7 is energized a locking circuit is established therefor which may be traced from its lowermost armature switch and the contact then engaged thereby (this armature switch being grounded through the battery 9) the winding of relay 7, to'the grounded contact of the upper armature switch of relay 80 by the path previously traced. The intermediate armature switches of relay 7, which are connected with the line sides of the calling line, are, as a consequence of the.

the release magnet 80 which may be traced from the grounded battery 9 through the previously closed ofi' normal contact switch 81, the Winding of the magnet 80, the normal contact of the lowermost armature switch of relay 6, to ground. The magnet 80 causes the side switch wipers 12 and 20 and the wipers 13 to 18 inclusive to be restored to their normal positions. When the calling subscriber restores his telephone upon its switch hook the release magnet 82 of the selector switch A is energized and the release magnet 83 of the selected connector switch B is energized whereby these switches are restored to normal in a. manner well understood by those skilled in the art. In order that the selector switch A may be compared with switches of the prior art it may be stated that it includes a sluggish interrupter relay 81, a rotary magnet 85, a vertical magnet 86, and a side switch wiper 87 for .governing the circuit of the rotary magnet and the switching relay 88. The side switch wiper 77 governs the circuit of the private magnet 89. In order that the connector switch may be compared with devices of the prior art it is shown to include vertical magnet 90, the ringing relay 91 having armature switches 92, 93, the side switch wiper 94 for governing the circuit of the rotary magnet 70 and the ringing relay 91, the side switch wiper 95 for governing the circuit of the private control relay 96, the

side switch wipers

97, 98 for establishing the talking circuit in their third positions, the wiper 98 establishing the busy test circuit in its second'position, the private relay 99, the back bridge relay 100 controlled by the called subscriber, the ringing cutofi relay 101, the relay 102 for controlling the private magnet and the rotary and vertical magnets circuits.

I have described how the operation of the third key in the first vertical row C, the fourth key in the second verticalrow D and the fifth key in the third row E will cause the connection of the calling line with the called line that is numbered 34:5 and will cause the words three, four, five to be spoken to the calling subscriber.

If the operator has made a mistake in re ceiving the number of the desired line from IQU the calling subscriber or if the calling subscriber has found that he himself has made a mistake, then the calling subscriber may restore his telephone to its switch hook and reinitiate the connection,the operator thus being relieved of the duty of ascertaining with certainty the number of the desired line, whereby the time of the operator is economized, the subscriber being at the same time ad vised whether or not the operator has properly performed her work in those systems where switching mechanism is employed for selecting line extending switches and bringuman ing them into connection with called or other lines. The shaft 29 also carries disks 10? (having one contact projection or finger; 10d (having two contact projections or fin-- gers), 105 (having six contact projections 01' lingers), 100 (having seven contact projections or fingers), 10",? (having eight contact projections or fingers), 108 (having nine contact projections or fingers), and 109 (having ten contact projections or fingers). The top keys in each ot the rows C, D, E employ disks 103, the next keys in these rows employ disk 10 i, the next keys employ disk 34, the next keys employ disk 55, the next keys employ dish 08, the neat keys employ disk 105, the next lreys employ disk 106, the next keys employ disk 10?, the next keys employ dish 108, and the bottomniost keys in these news C, l), E employ dish 109 so that the operator may extend any calling line of 900 lines into connection with any desired line, assuming said lines to be equipped with selector and connector switching mechanisms which it have described. The disks last mentioned and in the order last mentioned are capable, respectively, of interrupting the circuit of relay 3? once, twice, three times, tour times, five times, six times, seven times, eight times, nine times and ten times in one rotation of the shaft 29. The disks 103, mi, 105, 106, an", 108 and. 109 are, respectively, associated with talking device, no, 111, n2, 113, iii, no and 11s that are capable, respectively, of reproducing the Words one, two, six, seven, eight, and nine and the designation 0. These phonographs are adapted to impress telephonic current upon the calling line when their associate switching olislcs 103, etc, are employed, all in the manner which has been hitherto, described, whereby the number of any desired line from 1.00 he 099 is automatically spoken to the calling subscriber hy means of mechanism controlled by the op era tor when setting up the connection.

in order to prevent the continuity of the circuit of the tripping dish 48 from being maiiitained sufiiciently long to cause premature operations of the relays and 52, relays 117 and 118 may be, respectively, included between the normal contacts of the left handarmatureswitches of relays 3'2 and 52 and the conductors extending to the brush t0, relay 117, when energized, pre venting the passage of current to relay 52 and relay 118, when energized, preventing the passage at current to relay 65. The taili ino devices and their associate switching (l'lFiCEi may obviously he common to all of the lil operators positions, taps being indicated at 1 '10 leading to other operators positions and other sets of keys (I, E, 22 it a plurality of such sets is employed at each operators position While it have herein. shown and particularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction and circuit arrangement shown as changes may readily be made Without departing from the spirit of the invention.

Having thus described my invention I claim as new and desire to secure by Letters Patent the followings- 1. A telephone exchange system including telephone lines extending from telephone stations to an exchange; talking devices at the exchange adapted to spealr line designationsj and means for enabling said talking devices to impress telephonic currents-upon lines extending to the eXchanee,

2. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality cl talking devices serving to speak didering designations; and means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order.

A telephone exchange system including telephone lines extending" from telephone stations to an exchange; av plurality of talk ing devices serving to spealr differing per tions cl. line desi nations; and means for enaloling said talking devices successively to impress telephonic currentsupon lines extending; to the exchange in arhitrarily determined order.

l. it telephone exchange system including telephone lines extending from telephone stationsto an exchange; a plurality of talk ing devices serving to speali the names of (littering: digits; and means for enabling said talking" devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order.

5. A telephone exchange system including telephone lines extending from telephone stations to an exchange; talking" devices at the exchange adapted to speak line designations; and operator controlled means for enabling; said talking devices to impress telephonic curnents upon lines extending to the erehann'e.

6. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality ol talle ing devices serving to speak didering designations; and operator controlled means for enabling said talking devices successively to impress telephonic currents upon lines ex tending to the exchange in arbitrarily determined order.

ll telephone exchange system including telephone lines ertendii'ig ll-"rem telephone stations to an exchange; a a: ality oft talk ing' devices so; ing to sp t, dihhring por' tions 01. line des nations; and opei. trolled means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order.

8. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak the names of differing digits; and operator controlled means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order.

9. .A telephone exchange system including telephone lines extending from telephone stations to an exchange; talking devices at the exchange adapted to speak line designations; and means for enabling said talking devices to impress telephonic currents upon calling telephone lines.

10. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak differing designations; and means for enabling said talking devices successively to impress telephonic currents upo,n calling telephone lines in arbitrarily determined order.

11. A telephone exchange system including telephone lines extending irom telephone stations to an exchange; a plurality of talking devices serving to speak diflieriiig portions of line designations; and means for enabling said talking devices successively to impress telephonic, currents upon calling telephone lines in arbitrarily determined order.

12. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak the names of differing digits; and means for enabling said talking devices successively to impress telephonic currents upon calling telephone lines in arbitrarily determined order.

13. A telephone exchange system including telephone lines extending from telephone stations to an exchange; talking devices at the exchange adapted to speak line designations; and operator controlled means for enabling said talking devices to impress telephonic currents upon calling telephone lines.

14. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talk ing devices serving to speak differing designations; and operator controlled meanstor. enabling said talking devices successively to impress telephonic currents upon calling telephone lines in arbitrarily determined order. I

15. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak diflering poi"- tions of line designations; and operator controlled means for enabling said talking devices successively to impress telephonic currents upon calling telephone lines in arbitrarily determined order.

16. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak the names of ditlering digits; and operator controlled means for enabling said talking devices successively to impress telephonic currents up'on calling telephone lines in arbitrarily determined order.

17. A telephone exchange system including telephdne lines extending from telephone stations to an exchange; talking devices at the exchange adapted to speak line designations; means for enabling said talking devices to impress telephonic currents upon lines extending to the exchange; electro-magnetic switching devices for selecting line extensions and connecting them with calling lines; and operator controlled means for operating said switching devices and associating the means with the lines upon which the talking devices are to impress telephonic current vvhen calling lines are. extended.

18. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak differing designations; means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order; electro-inagnetic switching devices for selecting line extensions and connecting them with calling lines; and operator controlled means for operating said switching devices ,and associating the means with the lines upon which the talking devices are to impress telephonic current When calling lines are extended.

a 19. A telephone exchange. system including telephone lines extending from telephone stations to an exchange; a plurality oftalking devices serving to speak differing portions of line designations; means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily de termined order; eleetro-magnetic switching devices for selecting line extensions and connecting them with calling lines; and

operator controlled means for operating said switching devices and associating the means With the lines upon Which-the talkiaig devices are to impress telephonic current When calling lines are extended.

20. A. telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak the names of differing digits; means for enabling said talking devices successively to impress telephonic currents upon lines extending to the exchange in arbitrarily determined order; electro-magnetic switching devices for selecting line extensions and connecting them with calling lines; and

operator controlled means for operating said switching devices and associating the means with the lines upon which the talking devices are to impress telephonic current when calling lines are extended.

21. A telephone exchange system including telephone lines extending from telephone stations to an exchange; talking devices at the exchange adapted to speak line designations; means for enabling said talking devices to impress telephonic currents upon calling telephone lines; electro-magnetic switching devices for selecting line extensions and connecting them with calling lines; and operator controlled means for operating said switching devices and associating the means with the lines upon which the talking devices are to impress telephonic current when calling lines are extended.

22. A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak differing designations, these'talking devices being located at the exchange for this purpose; means for enabling said talking devices successively to impress telephonic currents upon calling telephone lines in arbitrarily determined order; electromagnetic switching devices for selecting line extensions and.

connecting them with calling lines; and operator controlled means for operating said switching devices and associating the means with the lines upon which the talking devices are to impress telephonic current when calling lines are extended.

A telephone exchange system including telephone lines extending from telephone stations to an exchange; a plurality of talking devices serving to speak diiiering portions of line designations, these talking devices being located at the exchange for this purpose; means for enabling said talking devices successively to impress telephonic currents upon calling telephone lines in arbitrarily determined order; electromagnetic switching devices for selecting line extensions and connecting them with calling lines; and operator controlled means for operating said switching devices and sociating the means with the lines upon which the talking... devices are to impress telephonic current when calling lines are extended.

24. A telephone exchange system including telephone lines extending from telephone stations.to an exchange; a plurality vices at the exchange having records of differing import; and means for causing said talking devices to effect the impression of telephonic current upon telephone lines in succession in arbitrarily determined order.

26. A telephone exchange system includingtelephone lines extending from stations to an exchange; a plurality of talking devices at the exchange having records of' differing import; and means for causing said talking devices to effect the impression of telephonic current upon telephone lines in arbitrarily determined order.

27. A telephone exchange system including telephone lines extending from stations to an exchange; a plurality of talking devices at the exchange having records of differing import; and operator controlled means for causing said talking devices to effect theimpression of telephonic current upon telephone lines in succession.

28. A. telephone exchange system including telephone lines extending from stations to an exchange; a plurality of talking devices at the exchange having records of differing import; and operator controlled means for causing said talking devices to effect the impression of telephonic current upon telephone lines insuccession and in arbitrarily determinedorder.

29. A telephone exchange system including telephone line conductors extending from stations to an exchange; conductors for uniting telephone lines in conversation; a plurality of talking devices at the exchange having records of differing import; and means for causing said talking devices to effect the impression of telephonic current upon conductors in arbitrarily cletermined order.

30. A telephone exchange system including telephone line conductors extending from stations to an exchange; conductors for uniting telephone lmes in conversation; a plurality of talking devices at the exchange having records of difiering import; and operator controlled means for causing said talking devices to efi'ect the impression of telephonic current upon conductors in arbitrarily determined order.

31. A telephone system including telephone conductors; a plurality of talking devices having records of differing import; and means for causing said talking devices to impress telephonic current upon telephone conductors in predetermined order.

32. A telephone system including telephone conductors; a plurality of talking devices having records of differing import and means for causing said talking devices to impress telephonic current upon telephone conductors in predetermined order, said means being operator controlled to enable the order in which the talking devices talk to be varied.

33. A telephone exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions for speaking line designations; and means for telephonically connecting the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting connection between calling and called lines.

3%. A telephone exchange system includ-' ing telephone lines extending to an ex.- change; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions for speaking line designations; and means for telephonically and interchangeably connecting the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting connection between calling and called lines.

35. A telephone exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing recor-il portions for speaking line designations; and operator controlled means for telephonically connecting the talking devices with the link connectors while said link connectors are free to be taken for use and operated in ef-- fecting connection between calling and called lines.

36. A telephone exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions for speaking line designations; and operator controlled means for telephonically and interchangeably connecting the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting connection between calling and called lines.

37 A telephone exchange system includ ing telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record. portions for speaking line designations; and means for coupling the talking devices with the link connectors while said link connectors are free to be taken for use and op erated in eifecting connection between calling and calledlines.

38. A telephone exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions for speaking line designations; and means for interchangeably coupling the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting con nection between calling and called lines.

39. A telephone'exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions for speaking line designations; and operator controlled means for coupling the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting connection-between calling and called lines.

40. A telephone exchange system including telephone lines extending to an exchange; link connectors at the exchange for uniting said lines; talking devices at the exchange having speech reproducing record portions ior speaking line designations; and operator controlled means for interchangeably coupling the talking devices with the link connectors while said link connectors are free to be taken for use and operated in effecting connection between calling and called lines.

In witness whereof, I hereunto subscribe my name this third day of July A. 1)., 1912.

MORTON L. JOHNSON.

Witnesses:

G. L. CRAGG, E. L. WHITE.