US852004A - Automatic telephone switch system. - Google Patents

Description

J. WICKS &D. D. MOKAY.

PATENTED APR. 30, 1907.

AUTOMATIC TELEPHONE SWITCH SYSTEM. APPLICATION FILED AUG,30,1905.

3 SHEETS-SHEET l.

PATENTED APR. 30, 1907. J. WIOKS & D. D. McKAY.

AUTOMATIC TELEPHONE SWITCH SYSTEM.

APPLICATION TILED AUG. 30, 1905.

3 SHEETSSHBET 2.

(l'fforum No. 852,004. PATENTBD AFR. so, 1907.

s & D. I). MoKAY.

OMATIO TELE J. WIGK AUT PHONE SWITCH SYSTEM.

APPLIGATION FILED AUG.30,1905.

3 SHEETS-SHEET 3.

(1440044 row Q 0" bx-wwc a 4 with which the usual wipers 3 and 4 co-operinore particularly that type known as the JOLLY WiCliS AND DONALD D. MoKAY, OF RIVERSIDE, CALIFORNIA.

AUTOMATIC TELEPHONE SWITCH SYSTEM.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed August 30.1905. Serial No. 276,407

T all writ/ m it may concern: 1

Be it known that we, JonN'WIoKs and DONALD D. MCKAY, citizens of the United States, residing at Riverside, in the county of Riverside and State of California, have invented a new and useful Automatic Telephone Switch System, of which the following is aspeciiication.

This invention relates to improvements in automatic tGll'lPllOllO exchangesystems, and

Stronger system.

The principal object is to provide novel means of a simple nature, whereby the automatic selecting or exchange mechanism will connect ringing current-generating means to the diilerent lines and to the diii'crent wires of a party line so that either party on such line may be called independently of the other.

,Two embodiments of the invention are illustrated in the accompanying drawings, Figure 1 being a diagrammatic View of one form, while, Fig. 2 is a similar View of a modification thereof. 3 is a diagrammatic View of the form illustrated in big. 1., and showingone type of the Strowger system in greater detail, together. with the improvenicnt's associated therewith.

Both of said embodiments are intended for use with the Strowger system, well known to those skilled in the art, and, in order to avoid confusion and illustrate the mecham ism as simply as possible, all features of said system not intimately associated with the present invention have either been eliminated or merely indicated. I g Referring first to the embodiment illus trated in Fig. 1, a portion of an. automatic sei ctor or exchange mechanism is shown, comprising first and second selector switches A and B, and a connector switch C. This latter includes banks of contacts 1 and 2,

ate. ()onnected to the connector switch C is a party line, which, as shown, comprises line I wires 5 and 6, in which the party instru l ments D'and E are located, one of said in struments being designated, for example, l 1201, the other 1202. Each instrument in- I eludes a signal bell, respectively designated 7 and 8, and it Will be noted that these bells are l connected through the hooks 9 with the separate wires of the line, each being connected to one only of the, wires, and said bells being grounded, as shown at 10; The line wires 5 q and .6 are respectively connected'directly to l:

certain of the contacts 1 and 2, and besides, are respectively and reversely bridged by wires 11 and 12 to the adjacent contacts 2 and 1. The remaining contacts may be connected in thesame or any ordinary manner to other line wires, as 13.

Connected to one of the wipers, as 3, by a wire 1+1 is a switch 15, that is movable into and out of engagement with one pole 16 of a ringing current generator 17, that is grounded, as shown at 18. The usual ringing relay 19 is employed, which includes the armature 20, for throwing the switch into and out of operation.

In the present embodiment, a calling station F is shown as connected by the usual wires 7* and r through the selector switches A and D to the connector 0, said station including the signal button 21, the contact for which is grounded, as shown at 22. This button is in electrical connection through the wire 1) and selector switches with a magnet 23, and battery 24, that is also grounded, as shown at 25. The armature 26 of the mag net 23 constitutes a circuit-closing means for the ringing relay 19. Assuming, therefore, that the station F has selected the station D or 1201'to be called, the selecting mechanism is automatically operated in the usual well known. manner, and the wipers 3 and 4. willstop upon the contacts 1 and 2, to which the line wires are directly connected, 'as shown in full lines, and this, therefore, connects the switch 15 with the line wire 5, to which the signal of the station I) or 1201 is connected. pressed, the circuit through the magnet 23 will be closed, the ringing relay will be operated, and the switch 15 closed. This will cause the current from the generator 17 to pass through the wire l ifthe wiper 3, the party line wire 5, and hell 7, and thence to ground, while the bell 8 of the other party is isolated. On the other hand, if the station E or 1202 is called, the wipers 3 and 4 will assume the positions indicated in dotted lines, in which case, the generator switch 15 will be in connection tlirough'the wiper 3, bridge w1re12, and line wire 6; wlth the bell 8 of station E, so that a call sent injfroin staticn F will operate the said bell 8 at station E, while the other party signal is now cut out. The wipers are, of course, in like manner, movable to their other contacts and thus perform their usual functions while serving in connection with the bridge wire and con- Ii, now, the signal button 21 is lOO .temnow in use.

tacts to effect independentconnections with. the party signals of a single line. It will be observed that'the structure involves no inaterialchangeon the part ofthe apparatus, as a whole, and that oneringing relay only is necessary, as heretofore, for each connector switch. Thus, practical means of a simple nature are provided for separately calling each party of a line.

Inorder to more clearly explain. the arrangement above described, the same is shown diagrammatically in Fig. 3,, in connection with one form of the Strowger sys- No claim is of course made to the mechanism or the arrangement in- I volved in this Strowgei' system outside of its associationor combination generally with the novel signal mechanism, as above set forth, and the more complete showing is made solely for the purpose of making our improvements in the signaling mechanism and its relation to the general system more clear and more easily understood by those skilled in the art. "As far as practicable, the

tion. The calling station-is designated generallyby the reference'letter F. On the firstselector A, there is the usual fourpole switch, known as the side switch, each pole of which makes contact with three different oints.

ered. 28, 29, and 31. The switch'is operated in a well known manner by means of the armature of the magne't32, commonly known as the private magnet. The line wipers of the first selector, designated 33, 34 and 35, areiastened together, and are moved in a vertical directionby'means of a magnet36i A rotary motion is'given to thewipers by a magnet 37. By this vertical and rotary motionthe wi ers make contact with an one of one hundred linesterminating in'the banks associated therewith, as is well known.

It will be observed that the vertical line 1) .irom; the calling station connects with the switch 28 or' the first selector, the dotted lines of said switch representing the normal position of the same. The line '0 is therefore connected through .the switch 28 with thewire 38 to the relay 39, known as the vertical re lay. This relay is furthermore connected through wire 40 to the spring 41 of the relay 42, commonly termed the cut out relay, and from the same spring 41, conne'ction is made with the'main side of the battery 24 through the dotted linesl43; 'The.

rotary line 1*, tromthe calling station is con- These poles are respectively num' nected through the ole 29 0f thefside switch by wire 44 tothe re ay 45, known as the rotary relay, which connects with the main battery through the wire 46, the' springs of the .relay 42, and the wire. shown by the'dot- 7a ted lines 43. I

As is well known, the Strowger calling device is so arrahged that a number of impulses corresponding to the number called is first given over the verticalline 1), after which fol- 7 lows an impulse over the rotary line'r. Thus for example, if five be called, the calling device will ground the vertical line *0 five times, at the ehdofgwhich a ground is given also to the rotary line r. Vhen now, an impulse is So given. to thevertical line 1), it passesthrough the dotted position of the side switch 28 and through line'38. Relay 39 thus being enerized,'will pull down the armature 47 and orce the spring 48' to make contact, with the spring 49. The spring49, as shown, is connected directly with the ground side of the.

battery. The spring 48 on the other hand is connected to spring 50 of the private magnet 32, through which it makes contact with the 0 spring51, and from thence through the ver tical magnet 36 with the main side of the battery 24, through the wire .shown in dotted lines at 52. It is therefore clear that every impulse of the vertical line i; closes the circuit of the vertical magnet36jcausingthe shaft to step up one pos tion in a manner "well; understood. Afterthe desired number of impulses are given overthe vertical line, animpulse is also given. overthe rotary liner. This Too passes through the dotted position'ofthe side switch '29 tore'lay 45;..drawi'ngthe armature 53 of said relay downwardly. The spring 5 4 isthereby forced against the-ground spring 1 49, and this irnpulseepasses' through; wire 55- 10 to the private magnet .32, which'is-directly connected through 43 tothe mainside of the battery. When the armature 56 of the private ma net .32 is pulleddown, it breaks cont'act of the springs 51 and 5Q,'thereby Opening the circuit of the vertical magnet 36.. At the same time, it allows the side switch as a whole to slip into its second position in a' manner well understood. Referring now to said side switch, the pole numbered.30 there- I 15 of is in its second position, making connection through 57 with 55, and hencewith the private magnet 32. Pole numbered 31 in its second position makes connection with the ground side of the battery 24 through wire 12c 58 and wire 59, the latter being connected through the interrupter spring 60 with the rotary magnet 37. As is wellknown, the armature 61 of this'rotary magnet 37 is so arranged that whenever it is pulled. down, it 12 5 breaks the circuit of the-magnet in ,the manher of an ordinary vibrating bell, Every time the armature is pulled. down, however, it causes the 'wipers to -rotate one position. Consequently, whenevertheside switch is sea-004 pleted through the battery, and ,the said magnet and thewipers will continue to rotatepas long as said side switch is left in that position; As soon, however, as wiper, makes contact with aline that is not grounded, thecircuit through the private magnet 32 is broken, and 'theside. switch slips from the second position into' the third, thereby, also breaking the circuit of the rotary magnet 37, l

and stopping therotary motion ofthe wipers.

Referring to theside switch now in its third position, thatis-in the positionit, holds after the first selector hasdone the Work, the vertical linen is connected through pole 28 of: said sideswitch, and line wiper 3,3 with a trunk line 62, leading to the second selector B; The connection of the line '0. is therefore ,completelybroken from the relay 39 of the ,first'selector, and in the same manner the rotary liner from the calling-station connects through 29 ot the side switch andline' wiper 34 'with atrunk line 63 leading to the same second selector, relay being in like manner out outof the rotary hne, audits connection wlth'the calling instrument. The operation of'the second selector is very similar to that of the first, the only difference being that it isnotsupplied with a cutout relay corresponding to the relay 42, the relays corresponding to the relays39 and 45 being connected directly with the main side of the bat tery. These relays, which are desi nated respectively 64 and 65 are provided with extra springs 66 and 67, so adjusted that they will-not make contact with either one of the armatures pulled dowmbut do make contact trunk line6.3 to the second pole of the second when both armatures are operated at the same time. The wipers of this second selector are designated respectively 68, 69 and 70. As-already stated, this second selectoroperates in the same manner as the first selector ustdescnbed, and consequently when "an impulse is given by the calling device after the first selector has operated, such im pulsevwill' pass overthe vertical line '0,

through side switch 28, the line Wiper 33, the trunk 62 to the side switch ofthe second selector B, and its'relay-l64, causing it to oper ate in the same manner as the first selector.

Having thus operated, the trunk line 62 is connected with the line wiper 68 of the sec ond selector, and-thereby with a trunk line 71 leading to the connector C. In the same manner, the rotary line 7" of the calling station is connected throughthe side switch 29 oft-he first selector, the line wiper 34 and the selector side switch, and thereby through the Wiper 69' with the trunl; line 72, leading to the connector C.- a ,1,

. As is well known, the connector differs from the first selector, and second selector in that it does 'not rotate automatically, but is caused to rotate step by step with the calhng device. It will be noted that the trunk lines 71 and 72 do not connect with the line relays 23 and 74 through side switches, as in the case of the first and second'selectors, but are connected directly thereto,fthe first and second poles 75 and 76 of.- the side switch being impulse is givenbythe calling device after the operation of the first and second selectors, it passes over the trunk line 71 to the vertical relay 23. This'ic'loses the contact, springs 79 and 80, 80 being connected directly to the ground side of the battery 24. 79 is furthermore connected with the private armature spring 81 and from there through lines 82 and pole 83, whichis in its first posi tion, mal-iing contact with the vertical mag net 8'4. An impulse over, the vertical line when the connector is in the normal position will therefore cause'the shaft to move step by step in the same manner as the shaft of the first selector] When the required number of impulses are'given over the vertical line, the impulses that pass over the rotary line will in the same manner pass through trunk 72 to relay74 of the connector. This causes spring 85 to connect with ground spring 80 When the circuit through private magnet 86 is comconnected to, thelines 7 land 72 through two condensers 7 7 and 7 8.. hen therefore an pleted, causing the-armature 87 thereof tobe 5 pulled down, andthereby allowing the sideswitch to slip into its. second position, as already described in'connection with the first selector. When the side switch is in said second position, the circuit is broken with the vertical magnet 84, andinstead bonnected through wire 88 with the rotary magnet 89, whence onthe next vertical impulse'given to the line, the closing, of'the circuit by. springs 79 and 80 of relay 73 will cause an impulse to be given to rotary magnet 89, causing the shaft carrying the wipers to rotate step by step. Thenext impulse overthe rotary lineagain closes the circuit of private magnet 86,

and allows the side switch to slip intoits third position, thereby. breaking all contact with the vertical and rotary magnets of the switch.

Referring now to the side switch 75 of 'theconnector, it is found to be connected through the condenser 77 with the vertical trunk line 71. This side' switch 75 is also now connected hythe wire 90 with the spring 15, of theiringing relay 19, and wire 14 to the wiper 3 of the'connector O, which is the corresponding wiper in Fig. 1 of the drawings.

The side switch 76 is, as already stated, connected to the rotary trunk line 72. through condenser 78, and now being in its third position, is; connected through Wire 91 with wiper 4 'The third pole 92 of the side switch of the connector being in its third position,.is' connected through wire 93, andwire'dfi'with the ground side of the battery; 24, thereby grounding Wire 94, and wiper95 of connector.

&

This also grounds the cut out relay-'96 of the first selector of the called subscriber, which separates the contact springs thereof that connect the main battery with the relays 97 and 98. Again the fourth pole 83 of the side switch of the connector, being in its third position, connects wire 82 with wire 99 to ringing relay 19, which is connected with the main side of the battery.

As a consequence, alter the selection is completed, an impulse over the vertical line will cause the relay 2% to connect the spring 79 and 80, thereby closing ie circuit of the ringing relay through spring 51; wire 82, switch 83, and wire 99. When the armature 20 of relay 19 is pulled down, it connects wire 1% with the generator, which sends the ringing current through wiper 3, normal wire 12, line wire 6, rin" g the cell at station E in the manner (.les rlhed in enmec-ionwiih Fig. '1 of the drawings. It will be noticed tha ringing currentcannot in any manner allect the first selector G oi the called subscriber, as

the relays of such selector are disconnected from the line by cut of? relay 96. other member of the two party line is called, the wipers 8, 4 and 95 will then engage the contacts which are bri d in reverse order, so that a ringing current will then go over the other line wire 5, and through the other hell 7 of the station D. it will thus be noted that after the selection is completed, the circuit is i the same as represented in Fig. 1.

A modification, and probably the preferred embodiment of the invention, is illustrated in Fig. 2. Since each section of the ordinary Strewger switchboard is made up 01 one hundred selectors and there are one hundred contacts for the connector switches, the most convenient method of bridging two wires to a line perhaps by connecting the corresponding contacts of two difl'erent sections. "rhus, in Fig. 2, A designates a connector switch that connects with one series of lines, numbered, say, from 1199 to 1300, and includes banks of contacts 1 and 2, with which the wipers 3 and 4 (300p81'11t(3; Another connector switch B connects with another series of lines, numbered, say, 1299 to 1400 and includes contacts 1 and-2 with which the wipers 3 and 4 co-operate. A part-y'line is shown as composed of. wires 5 and 6, on which are located the stations C and 1), respectively designated 1201 and .1301, and having hells 7 and 8*. Each of the bells is connected to one line wire only and is grounded, as illustrated at 9*. Now the iirst contacts 1 and 2 are respectively connected to the line wires 5 and 6 by the wires 11 and 12, while the corresponding contacts 1 and 2 of the other connector switch are respectively connected in a reverse manner by the wires 13* and 14 -to the wires 6 and 5".

A ringing current generator is shown at If the wires 17 eluding two wires, of party signals,

15 the switches 15 of which are'connected respectively with the wipers 3 and 3* by the Associated with the connector switches are the usual ringing relays 16 and 16 The wipers of a second selector switch are illustrated at 17 and 18 the same being movable into coaction with the contacts 19 and 20 of the connector switch A, and the contacts 19* and 20 of the connector switch B. v A calling station E, having a signal button 21 is shown as connected by the wires 1* and a through a first selector switch F to the second selector switch. If, now, the station E calls C or 1201, the wipers 17 18 oi the second selector switch will assume the relation shown, and the wipers 3 and 4 of the connector switch A will con nect with the line wires 5 and 6, so that a signal from the calling station will cause the current from the generator 15 to pass through the line 11 and thence through the hell 7 11, however, station D or 1301v is called, the wipers 1718 will contactwith 19* and 20", while the wipers 3 and 4* will respectively engage the contacts 1 and 2", with which the line wires 5 and 6 are connected.

ringingrelay 16 will operate to throw the generator 15 into circuit wit-lithe line 6,

and thus the bell 8 will be rung. It will be 1 observed that this arrangement has all the advantages and is directly along the lines'of the first-described embodiment, for in this form also the usual wipers are made-to carry the ringing current to either wire and but one ringing relay is necessary for each con-- 1 nector and all the lines associated therewith.

From the foregoing it is thought that the construction, operation, and many advantages of Lhe herein described invention will be apparent to those-skilled in the art, without further description, and it will be understood that various changes in the size,shape,

proportion, and minor details of construction may be'resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described our invention what we cl aim as new and desire to secure by Letters Patent, is:

1. In an automatic telephone exchange system, the combination with a party line including two wires, (.f party signals, each of which is connected to one only cf the wires, ringing current-generating means, and lineselecting mechanism including wipers cennecting the generating means to either of the wires (.f the said party line -and crnstituting part of the ringing current carrying means between the generating means and the signals.

2. In an automatic telephone exchange system, the combination with a party line ineach. of

'l herefore, upon the operation of the signal button of the calling station, the

' the line ,wires; v p, 54. In an automatic telephone exchange 25- which is connected to said respectively to the wires, ringing currentline-sclecting mec dne onlyfjoflthe wires, ringing current-generating means, line -se lecting mechanism including contacts bridged to the wires of the party line, and wipers cooperating with the contacts and having .connections with the generating means to electrically connect the same to either wire of party line, said wipers constituting part of the means for carrying the ringing current from the generating means to the signals.

3. In an automatic telephone exchange system, the combination with a'party line inc uding two wires, of party signals connected generating means, line-selecting mechanism including banks of contacts, certain of said contacts being bridged to the wires of said party line, wlpers operating over said con tacts, and connections between the wipers and currentenerating means to cause the connection 0 the latter to-either wire of the line, said connections being independent of system, the combination with a plurality of llnes including a party line having two wires, of partysi als, each of which is connected to one of t e wires and is grounded, ringing current-generating means also grounded,

nanism including contacts, i

wipers operating thereover, bridge connections between certain of the contacts and the different wires of the party'line, and electrical connections between the generating means I and the wipers that engage the bridged contacts, said connections the line wires.

5. In an automatic telephone exchange system, the combination with a plurality of lines including a party line having two wires, of party signals, each of which is connected to 'one only of the wires, line-selecting mechanism including switches that cooperate with the different lines, ringing current-generating means electrically connected to the selecting mechanism, and bridging connections between the party line wires and the connector switches, whereby the generating means may be electrically connected to either wire independently of the other.

In testimony, that we claim the foregoing as our, own, wehave hereto aflixed our signature in the presence of two witnesses.

JOHN WICKS. DONALD D. MQKAY.

being separate from Witnesses:

A. WAGNER, A. F. SNIDER.

selector and connector

Images