Historical Document · 1915
US 1,151,541 Calling Device for Automatic Telephone Exchanges
Later dial (calling device) patent, filed 1903.
Historical Document · 1915
Later dial (calling device) patent, filed 1903.
A. E. KEITH & J. & 0.1. ERICKSON. CALLING DEVICE FOR AUTOMATIC TELEPHONE EXCHANGES. APPLICATION FlLED MAY4, 1903. Patented Aug. 24, 1915. 1,151.51. WITNESSES: WWW, 5 SHEETS—SHEET 1. .INVEN QMOéUL ' éM'v/m W By _ é‘M'E/LMI . MI A. E.- KEITH & J. & C. J. ERICKSON. _ CALLING DEVICE FOR AUTOMATIC TELEPHONE EXCHANGES. ‘1,151,541..’ APPLICATION FILED MAY 4, 1903. Pateiited Aug. 24, 1915. 5 SHEETS-SHEET 2-. lNV'ENTORSi A. E. KEITH & J. & 0;]. ERICKSON. _ CALLING'DEVICE FOR AUTOMATIC TELEPHONE EXCHANGES. APPLICATION 1,151,51.. FILED MAY 4,'l903. > Patented Aug. 24, 1915. 5 SH_EEITS——SHEET 3> AVE. KEITH & .l. & C. J. ERICKSON.‘ CALLING DEVICE FOR'AUTOMATIC'TELEPHONE EXCH‘RNGES. fkPPLldATION man MAY 4. 1903. 1,151,51. , ‘ ~ Patented Aug'. 24, 1915.v 5 SHEETS-SHEET 4. A. E. KEITH & 1. 6i 0. J. ERICKSON. CALLING DEVICE FOR AUTOMATIC TELEPHONE EXCHANGES. APPLICATION FILED MAY 4, 1903. Patented Aug. 24, 1915. 1,151,541, 5 SHEETS-SHEET 5 I 53~~~ 7W . ._LE?»_ _. _. ' ALEXANDER E. KEITH, or nmsnann, AND JOHN Enrcixsou Ann CHAR-LES'J. Enron, ' SOIL-OF CHICAGO, ILLINQIS, ASSIGN OBS, BY MES-NE ASSIGNMENTS, TO FIRST TBU$T AND SAVINGS BANK, TRUSTEE, OI‘ CHICAGO, ILLINOIS.’ _ v ' CALLING DEVICE non auroiua'nc rnLnrnonn-nxcmens. aianaai. _ speémaanon of Letters Patent. "Patented Aug. 24:, 1915, Application ?led May 4, 1903. Serial No. 155,582. ‘the present invention over the invention set Be it known that we, ALEXANDER E. forth in the herein'before named patent con 55 KEITH, Jomv ERroKsoN, and] CHARLES J. sist'of a better construction of the circuit Enrcnson, ALEXANDER E. Knrrn residingat changer and a better means for producing ' Hinsdale, in the county of Dupage and State the required number and duration of inter-, of Illinois, and JOHN ERICKSON and CHARLES mittent currents over any one or all of a 60 J. 'Emcnson both residing at Chicago, in plurality of circuits as maybe necessary for To all whom it may concern: ' 1 the county of Cook and tate of Illinois, the duty of operating a simple or automatic . have invented a new and useful Calling De telephone exchange. St1ll- another improvement consists in 10 vice for Automatic Telephone-Exchanges, of means for locking the means through which. which the following is a speci?cation. 6.5 Our'invention relates to means at a sub the mechanism is manipulated by virtue of the telephone receiver, until after the latter scriber’s station for controlling through a plurality of line wires electrical impulses is removed, 'to prevent any one from care interfering with the regular cycle of '15 through the magnets which operate switch- ' lessly ing devices comprising either a simple or an successive movements and thereby prevent 70 tomatic telephone or telegraph exchange or ing the central exchange mechanism from central station, and our object is to provide elng partially operated and not released to ' for this purpose a more erfect construction the normal or ?rst position ready for an other call. 20 than in the invention em odied in our’ patent The mechanism by which these results are of theUnited States, dated January 11,, 1898, attained comprises a plurality of circuits, number 597 ,062, in which we employ as, in in this instance ?ve, the calling, local bat the present invention, a step by step circuit and release circuits, breaker and a circuit changer, whereby a tery, ringing, receiver ' 'two of which, the calling and the release g person at one station may intermittently 25~ and alternately energize a plurality of elec each has a plurallty of terminals or contact . 80 tro-magnets, one at a time, at the central points, part of which terminals are adapted to be closed successively, as by an intermittent station, the initial movements of the oper circuit closer or wheel provided with teeth or ator being transmitted to the device by means contact makers in making a call, other termi nals are adapted to be closed alternately as by be arranged in many different forms and a circuit changer for causing a current to be 85 adapted to be interconnected with the callin '30 of a series of movable ?nger holds, which may device switching mechanism in many di - passed over the calling circuit alternately the holds, and operating against the resili as by the descent of the receiver hook when 45 moderate rate of speed by virtue of a simple Figures 1, 2, 3 and 4 show, respectively, a ferent ways, but in this instance are disposed 'to operate the switching mechanism at the central exchange, other. terminals are adapt 35 in circular order, concentric with a shaft, ed to ‘be closed simultaneously to release the ‘ which latter is adapted to revolve by the ac 90 tion of a ?nger engaged with someone of switching mechanism at the end of a call, ency of a spring, the latter being wound up the receiver is hung up, and the other ter minals are adapted to be closed in- such order 40 a different amount for the movement‘ of each or manner as will be necessary to complete’ ?nger-hold, and when any particular ?nger the circuits in making a'call. Said mecha-p as’ hold has been moved up'to a stop and then released the tension of the spring causes the nism is described hereinafter and illustrated parts to return to the normal position, at a ‘in the accompanying drawings, in which elevation; a plan; a rear elevation; and governing mechanism, causing theswitching afront side elevation looking in the direction indi 100 devices in this return movement to serve as mediums through which an intermittent cur cated by arrow A, Fig. 1, of the frame and rent of electricity is permitted to passv operative mechanism. Fig. 5, is a transverse vertical section on broken line B, C, Fig. 2, -50 through a particular one of a plurality of looking in the direction indicated by are wires, each oonnectedvto a motor-magnet to row D,‘ Fig. 6 is a transverse vertical sec 105 be energized at the central station. tion on broken line F, G, Fig. 2, looking in The particular improvements embodied in a. 1,151,541» _ the direction ‘opposite to that indicated by‘ mounted in the frontand back plates 5 and arrow D_. Fi s. 7, 8 and 9 are elevations of 6 of the main frame. ‘At the rear of disk a portion 0 the rear frame plate and v2 is a volu'te spring 7 having one end at mechanism attached thereto in several'rela tive ositions to illustrate action of switch ing evices. Fig. 10 is a perspective view of a group of three switch springs, as they appear when removed from the other mechanism, to tached to shaft 4, and the other end to the main frame. Shaft 4 and disk 2 are held 70 in the normal position Fig. 1, against the resiliency of spring 7 by an arm 8, Figs.v 3, 7, 8 and 9, attached to the rear end of plainly illustrate the relative position 'ofia portion of shaft 4, which arm contacts a '10 projection on one spring which is adapted to pin projecting from the main frame and 75 be contacted by a projection on the telephone ~,forms, in this position, an electrical connec- _ ~ receiver hook lever for closing the springs randthe electric circuit therethrough. Fig. tion therewith. _ Loosely mounted on shaft 4 is a wheel 10 11,.is a side elevation of the springs shown which is provided with ?ne teeth, so, as to 15 in Fig. 10, together with the inneroend por as airatchet wheel,and as a cog'lwheel 80 tion of the telephone receiver hook lever serve adapted to engage a small pinion 11 on in the position when the springs are closed shaft 12 upon which latter is mounted at . by the descent of this lever. F1 . 12, is the the opposite end from pinion 11 a centrifu same as Fig. 11, but with the te e hone re gal speed governor 13, for regulating, by a p20 ceiver hook in a different position rom that variable frictional contact with a concen 85 shown in Fig. 11, to illustrate the action tric stationary boss, the speed of revolution of the upward movement of the telephone of not only wheel 10, to which it is directly receiver hook lever, without closing the . geared through pinion 11 integral with switch springs. Fig. 13, is an edge elevation shaft 12, but the release or, return'move 25 of a part which is attached to the telephone ment to the initial position of ?nger-hold hook lever, as'plainly shown in Fig. 11, and disk 2, the attached shaft 4 thereof, and all 90 ‘is provided with two laterally projecting the depending parts hereinafter described, arms‘ for operating the switch s ring mech for the purpose of preventing the desired anism shown in Figs.‘7, 8 andp9, and for intermittent electric currents, for operating 30 closing the switch spring shown in Figs. . the magnets of the central exchange 95 11 and 12. Fig. 14 is an elevation of a part ‘ switches, being transmitted too rapidly, for‘ of the rear of the frame with a portion ‘of well known reasons. . the inner end of the telephone hook lever In Fig. 5 is shown the wheel 10, and a pivotally attached thereto, and in a raised portion 13 of the governing mechanism, and 85 position, when a series of switch springs it also shows the inner end portion of the 100 different from‘ those above referred to are in telephone hook-lever 14, which is pivotally the closed position, on account of being out attached to the main frame at 15. of contact with a projection from the tele 5, and not sgiown in Figs. 2 phone hook lever, which opens the spring andAt4,16,is Fig. a bent rod pivo ally attached to 40 when in the lowest or normal position illus the short end of lever 14, the other end of 105: ‘ trated in Figs. 1, 3, 5 and 6. Fig. 14, also‘ the rod being in engagement with the end illustrates, in a small broken circular line, of a spring 17 which is attached to the the position of a stop pin on one of the rota . lower end of the main frame, and serves to tive parts against a spring, which places lift ‘the telephone receiver hook lever 14 to 45 one of. the switch springs of the group the‘ second position, as in Figs. 8 and 9, 11.0 shown in electrical connection with the after the removal of the receiver. . frame of the device, whenever the ?nger A pawl 18, Figs. 2, 3 and 6, is pivotally hold disk and the impulse switch wheel are attached to lever 14 at 19, Fig. 5, and is in normal positions shown in Figs; 1 and 6.l adapted to engage the teeth of wheel 10. 50 Fig. 15 is diagrammatic, to illustrate the Stop 20, Figs. 2 and 4, projects from the operationof the calling device when placed inside of the front frame plate 5, and serves 115 in electrical connection with an automatic to limit the downward movement of lever telephone exchange switch at a central ex-. 14 under the weight of the telephone re change, and is fully described hereinafter. 55., Similar numerals indicate like throughout .the several views. ceiver,,against the resiliency 'of spring 17. parts . ‘ Figs. 2, 4, 5 and 6 plainly show a make 120 .and break terminal or contact as a spring The mechanism shown in the drawing arm 21 which is attached at one end to and herewith is all inclosed in a suitable pro in electrical connection with the main tective case, not. shown, with the exce tion frame, at one side thereof, and the free end 60 of the ?nger-hold disk or actuator 2, ger projects inwardly and through theframe 125 stop 3, and a‘ portion of the front end of’ to the opposite side where it is adapted to shaft 4, Fig. 2. Disk 2 is ?rmly mounted contact a pendant terminal 22 which is at- _ on and insulated from the outer end of shaft‘ tached to and insulated from thejframe 4, which latter is disposed through the 65 plate central portion of the device, and revolubly 6. ' _ ' ' > ‘ Firmly secured to shaft.v 4:,is a segment 130 ' 1,151,541 ‘ wheel 23, Fig. 4, provided with a series of 8 is against pin 9, Figs. 3, 7 and 8, when the eleven actuators, I as teeth or projections arm 35 is in the position shown in Figs. 3 which form contact makers and number one and 7, with the lower end thereof in the path more than the number of ?nger holds 24 in indicated by the circular broken line of a c disk 2 and pivotally attached to wheel 23 is projecting pin 36.0r stop arm 8, which osi a pawl 25 which engages cog wheel 10. - tion prevents any upwardvmovement o the There is a projection 26, Figs. 5 and 6, latter 'or'of the connected ?nger-hold disk. from make and break spring arm 21 which If, now, the‘ telephone receiver 37 is re is disposed at a slight angle in unison with moved from the hook, and the lever 14 rises 1-0 a lateral bend in thearm, andis adapted by, virtue vofspring 17, a projection 38 on the 75 _ to’ engage the teeth of segment wheel 23, so lever contacts arm 35, and the latter is lifted as to cause the outer end of the arm to suc the fposition shown in Fig; 8, above the cessively and intermittently contact the to path 0 the pin 36 on stop arm 8, in which - pendant terminal 22 as many times as there , position arm 35 still holds switch sprin or. 15" are teeth in the wheel 23, when the latter is terminal 39'but of contact with the terminal so moving in one- direction of revolution, but 40, which'latter is in electrical connection on account of the bevel on the teeth of wheel 23, and the angular disposition of the pro jection 26 relative to the wheel, the arm is 20 ,held‘from contacting the terminal 22 when the wheel is moving in the opposite direc with the pendant terminal 22, but should the ?nger ho d disk be ‘moved in the direction ' indicated by arrow E, Fig. 1, which causes the stop arm 8 'to‘m'ove as indicated by arrow 83 F,‘Fig. 8, the pin 36 on stop arm 8 serves to lift arm 35 to the, position shown in Fig. 9, At 27 is a spring having one end in‘light when switch spring 39, being released, falls contact with spring arm 21, to prevent un ‘ into contact with 40, and through it is placed 25 due lateral vibration of the latter. in electrical connection with terminal 22. 90 A pin 28, Figs. 6 and 14, projects from‘ The calling device circuit changer com segment wheel 23 which is in electrical con prises a disk 41, mounted in insulating mate nection with the frame‘ of the device. ‘Pin rial on the rear end of shaft 4. One half of ' 28 is normally‘ in contact with a spring 29, . disk 41 is of smaller diameter than the 30 Figs. 1, 5, 6 and 14 and the latter is in elec other, and therefore out of reach of two in 95 trical connection with a‘ member 30 of a sulated springs or terminals 42 and 43 which spring compound switch consisting of ter are so disposed that the free end of but one minals or contact points as springs 30, 31,‘ spring at a time is in contact with the disk. tion. _ 32, 33 and 34. 35 ' -- - ‘ . - Springs 33 and 34 are for the local bat A. spring 44 secured to the main frame in in sulating material, Figs. 3 and 4, is in con tery circuit for the transmitter. Spring 32 tact with disk 41 and serves to always elec andv the projection 58 from telephone hook ' trically connect the disk through wire 45, lever which is connected with the frame are Fig. 15, with make and break spring arm 21. , in the ringing circuit. Springs 29 to 30 In this manner the disk has two contact and 30 to ‘31 are in the receiver circuit. points, one of which is the ?at surface with 193 Since these springs are in circuits not par which the spring or terminal 44 of one of the ticularly essential to illustrate this inven circuits contacts at all times, and the other tion, except to show the relation of part of one is the periphery of the larger portion their terminals or contact points to the tele and is movable into and out of engagement 45 phone receiver hook andto the intermittent with either of the terminals 42 and 43 of 110 circuit closer of the calling circuit, no fur-_ the other circuit, said terminals 42 and 43 ther description is necessary. being preferably diametrically opposite‘to In Figs. 3, 7, 8 and 9, is shown anarm 35 each other and in such position as to engage having one end pivotally mounted on the only with the periphery or larger portion of .rear frame plate 6, and serves not only as a .115 lock to prevent the ?nger-hold disk from. In the 'dia rammatic view, Fig. 15, is bein ‘turned out of the normal position shown the ca ing device, and an- automatic unti after the telephone receiver is removed telephone exchange switch connected by line from the hook, but also in combination with wires 46' and 47 ; line wire 46 being bifur 55 a projection from the telephone hook lever cated and connected at one end to switch 120 serves to close a switch spring or terminal springs or terminals 42 and 48 at the callmg and hold a certain circuit closed during the device, and at. the other end, at the central time required for a call and a conversation, ,exchan e is normallyl in electrical connection and is only moved to the ?rst or normal posi~ with t e battery t rough‘ circuit chan er .CO tion as a lock for the'?nger hold disk after switch-arm 49, wire 50, vertical magnet 5, 123 the telephone receiver has been replaced and battery wire 59.‘ The other line wire 47 upon the hook after a call is made or con-. is bifurcated and connected at! the calling‘ versation ended, the movements of the sev- device with switch springs vor terminals 43 eral parts to attain this result being as fol and 52 and the end at'the central exchangg lows: The normal position of the stop arm . with an auxiliary switch magnet 71, wire 132 the disk. ' ‘ ' . 1,151,541 4 ) and battery wire 59, the auxiliary magnet the telephone lever 14 produces the eifect of serving to operate the circuit changing an electric current passing, at one tlme, through both line wires 46 and47, for the ‘ switch arm 49. ' > Switch spring 39 at the calling device is in purpose of effecting the ‘release to the normal sulated from the part to which it is attached, condition of a central station switch, from 70 but is brought into contact therewith when a substation, without the 'necessity of a third the calling device is in electrical connection from ground through ‘wire 57 ‘ and the line wire. pendant terminal 22 which is attached to - , The means by which the switch shaft is re- ' leased from its operated position comprises the release magnet 61 ( ig. 15) whlch is 75 10 part 56, and which we hereinafter refer‘to. There are a number of switch springs 30, provided with an armature 62 to the lower 31, 32, 33 and 34 shown in Figs. 1, 5, 6 and .end of which is attached an arm 69. The 14, which are connected with the talking spring 63 normally holds the armature 62 ‘ and ringing circuit, not shown, but these‘ in the position shown. 1 80 ,64 is a detent shaft upon which are se springs arefor the purpose of opening this 16 cured two detents 65 and 66, which, respec circuit by the gravity of the telephone _re ceiver, when on the hook, as shown in Figs. tively engage with the teeth of the vertical 1, 5 and 6, where a projection 58 from the _ ratchet 73 and the rotary ratchet 74, on telephone hook lever 14 contacts and moves switch shaft 79 when the instrument is being ‘operated. The helical spring 67 holds de 85 20 spring 32, which, through the. pads of in sulating material between springs 32 and tents 65 and 66 in yielding engagement with t > ' 33 and 30 and 32 causes springs 33 and 34 the ratchets. A pin 68 projects from detent shaft 64 and and 30 and 31 to separate. After the tele phone is removed _from the hook, the above ' is disposed in the path of movement of .a 90 25 named springsas’sume the position shown in bent lever catch-pawl 69, which latter is ' yieldingly held in position by spring 70. ' Switch springs 48, 52 and 54 form triple , At 7 5 is the vertical magnet whose arma Fig. 14, with the circuit- closed. ture is attached to lever v7 6 to which is current for releasing the switch mechanism pivoted a pawl for engaging vertical ratchet 3 in operatlng shaft 79 step by step ‘ver 95 30 at the central exchange, so that it’ may re turn to the initial position ready for another tically. Lever 7 6projects to Within a short call, and these springs are shown in the open distance of detent shaft 64, so that, when this lever is operated by the vertical magnet ' position in Figs. 3, 10, 12 and 15. The action of the telephone lever in clos 75, the outer end of the lever is adapted to . 85 ing the release circuit is shown in Figs. 12 strike the inwardly projecting end of re- 100 lease pawl 69,- and remove the latter from and 13. ’ > In Figs. 4 and ' 10 is plainly shown a "engagement with the detent shaft pin '68 lateral projection 481 from the inner spring and permitthe detents 65 and 66 to be move 48 which is in the path of'a projection 60 by virtue of helical spring 67, into, enga e .ment, respectively, with vertical ratchet 3 105 40 from the telephone lever 14. When the telephone lever is rising after and rotary ratchet 74 at the proper time. the removal of the telephone, projection 60 When the detent shaft 64 is operated so as engages the projection 481 on the concave to lift detents 65 and 66 from engagement side shown in Fig. 10 and moves it away with ratchets 73 and‘ 74 a rod 84, having one 45 from the adjacent spring 52, as shown in end pivotally attached to detent 66 and the 110 Fig. 12, but when the lever is descending the other tipped with'insulation, contacts with projection 60 ‘contacts the opposite or convex and moves the switch lever 49 from connec side of the spring projection 481 and moves tion with wire'83 to connection with wire 50 the spring ?rst, into contact with center or into its normal condition. '50 spring 52, when these springs are connected, ' In operation, if it is desired to set a sub- 115 respectively, with line wires 46 and 47 then, scriber’s telephone switch at the central ex by this contact and further-downward move change to communicate, for instance, with ment of projection 60 center sprin 52 is telephone'switch and telephone number 35, brought into contact with outer spring 54, ?rst remove the telephone receiver from the 55 as shown in Fig. 11, when both springs 48 hook when arm 35, at the calling device 120 and 54 are in connection through wire 55 will be moved from the osition shown in with terminal 22, Fig. 15, the insulated part Fig. 7 to that shown in Fig. 8, when arm 8, or bracket 56 and the terminal 40 thereof, shaft 4, and the ?nger-hold disk 2 are free and with the ground wire 57, ifspring 39 is to move. Referring to Fig. 1, the operator terminals which serve to control the electric in contact with the terminal 40, as shown in now laces a ?nger in contact with ?n er- 125 Fig. 9. ' . _ hold lilo. 3, which is pulled down aroun in r The triple switch springs or .terminals 48, the direction indicated by arrow,E, until 52 and 54 are in~ the central exchange switch the ?nger contacts the sto 3 and is with- ‘ release circuit, and the manner in which drawn, when ?nger-hold isk 2 is released 66 these springs are operated by the descent of, and by virtue of spiral spring 7 carried 1:0 1,151,841 ' backwardly, together with shaft 4, and con "changes theeircuit' from line wire 46 to 47 nected selgment-wheel 23- to the normal 120-‘ the e?ect is to. simply operate the armature sition. ' 11 thus ‘manipulating the ?nger-_ of auxlliary magnet 71, which would have hold disk, the ?rst movement downwardly, no‘ e?ect _upon' switch lever 49' since it causes the arm 8 to assume a position simi would be in the second position in commu 70 lar to what is shown in Fig. 9, and lift the nlcation with wire 83. k . . arm 35 fromvthe position shown in Fig. 8,. In the manner described the switch shaft when contact spring 39 falls into electrical 79 would have a wiper arm in'electrical con connection with .arm 40 of ' the insulated part 56 which is‘ in electrical connection with pendant terminal 22, Figs. 1, 2 and 4. Also in the ?rst movement downwardly, the IlGCtlOIl'Wltll contact point No.‘ 35 of some subscriber’s line not shown. , _ In the operation of release, a subscriber 75 hangs the telephone on the hook when arm insulated circuit changer has been moved 14 escendmg in the manner hereinbefore ,from the position shown in Fig. 3 to the described, causes the switch spring 52 and 15' position shown in Fig. 9, or the segmental ‘48 to ?rst contact, and thus connect line 80 roken lines in Fig. 15-, out of contact with wires 46 and 47, then they are grounded si switch spring 43 and into contact with multaneously by being brought into contact switch spring 42. In the second or back with spring 54, which causes a simultaneous .ward movement, on account vof segment current. over both main lines 46 and 47 , 20 wheel 23 having one more beveledvtooth of the whole number than in the whole num ber of ?nger-holds on plate 2, and this ex with the result, that the auxiliary magnet 85 is operated to close springs 80 and 81, when current passes through release magnet 61, tra tooth being placed angularly ahead, closing its armature 62 and permitting'the relativel to the arran ement of the ?nger hook arm '69, attached thereto, to engage t e segment W eel teeth operating with the pin 68, which projects from detent 90 spring, arm 21, causes the‘ latter. to sepa . shaft 64, and when the circuit is broken by 26 holds, rately contact endant terminal 22, four the additional descent of telephone lever 14, times instead 0 three, when the ?rst three of these impulses pass from battery 77 wires 30 59 and 78, vertical ma net 75 wire 50 switch arm 49 line wire 46 t en to the calling de ‘the strong spring 63 controlling lever arma~ ture 62 lifts the latter and withdraws the pawis 65 and 66 to the position shown clear of ratchets 73 and 74, and moves the rod 84 vice, spring 42, disk 41, spring 44, wire 45, so as to return the switch lever to its nor spring arm 21, terminal 22, part 56, arm 40 then spring 39, wire 57 to ground, and b 85 electro-magnet 75 operate main switch sha ‘t 79 three upward steps. ‘\But just before the last electrical impulse of the four above de scribed, the circuit changer. disk 41 has been moved from the position in contact with 40 s ring 42v to contact with sprin 43, when mal position, when ‘the main switch shaft 7 9.11s free to return to the initial position by virtue of gravity and the spring 82 at the me lower end portion. - . ' We claim as our invention: ' 1. A device of the character described comprising a plurality of circuits, an inter mittent circuit closer adapted to be included 105 attery 77 in either of saidcircuits, a circuit controller, this last impulse asses from through wire 59, wire 72, auxiliary electro means for operating the closer and con magnet 71 and line wire 47, spring 43, disk troller alternately, and means for closing ‘ 41, spring 44, wire 45, spring arm 21, pend said circuits simultaneously. 45 ant terminal 22, part 56, arm 40, spring 39 2. A device of the character described 110 and wire 57 to ground, causing the aux comprising two circuits, an intermittent vcir - iliary electro-magnet 71, vto operate the cuit closer adapted to be included in- eithcr ‘ switch arm 49 so thatz line wire 46 is moved circuit, a circuit controller, and means for out vof connection with wire 50 and into 50 connection with wire 83, which leads to the closing said circuits simultaneously, sub stantially as described. 115 rotary electro-ma et 51. This far main ‘3. A device of the character described switch shaft 79 has been lifted three steps, comprising two circuits, an intermittent cir and communication established with the ro~ - cuit closer adaptedto be included in either tary magnet, which before was cut out of circuit, a circuit controller, a receiver hook, circuit. If now, the’ ?nger-hold disk is and means connected with the receiver hook 129 moved from the ?fth hold to the stop, and for closing ‘said circuits simultaneously, sub six impulses sent over the line wires, ?ve of stantially .as set forth. these ‘impulses would pass from battery 77 4. A device of the character described through wire 53, electro-magnet 51, wire 83, comprising a circuit having two circuit-close the moved switch arm 49, wire 46 ing means, one of which is adapted,when op~ 125 spring 42, disk 41, spring 44, wire 45, erated, to intermittently open and close the 60 then spring arm 21, pendant'arm 22, part 56, arm , circuit and the other one is adapted to éloee ’ 40, spring 39 and wire 57 to ground and a release circuit, a telephone receiver sup thereby causing rotary magnet 51 to revolve port movably mounted and having connec 65 shaft 79 ?ve steps. When the disk 41 tion with said other circuit-closing means to 130 1,i51,541 ‘a hold ‘said circuit open: until said receiver of engagement two of the terminals of ort is moved'in one direction, substan- - said two circuits'.,; 1 _ ~. . 11. In a telephone exchange calling de— 5. A'device of the character described vice, ‘a pluralit of circuits, an intermittent ' asset forth; 7 ' _ comprising a plurality of circuits, an inter circuit closer, t, ree terminals, one of which 70 mittent circuit-closer and a circuit-changer. is common to two of said circuits, and a connected to move in unison, the circuit substantially circular, disk-‘like circuit changer having a single contact surface changer, the periphery of- which is of two adapted for successive engagement with one diameters, one, face of the disk being in con terminal ‘of each» circuit, and the circuit stant contactlwith one of said three termi-w75 10 closer having contact means for making nals and the portion of the periphery havin electrical connection with each of said ter the larger diameter being movable into an minals through the contact surface of the out of engagement with either‘ one of the ' circuit-chan ‘ r, substantially as set forth. other terminals. - i 1 ' , 12. In a telephone" exchange calling‘de 16 '6. In a te ephone exchange callin device, vice, a plurality‘ of circuits, two contact‘ a plurality of circuits, the calling an releas 1 ing‘circuits of which ‘each has a plurality of closers,‘ one of which is adaptaed to alter terminals, an intermittentcircuit closer, a nately close said circuits‘ "intermittentI circuit changer-having two contact points, when making a call, and the other one 15 adapted to closeboth circuits simultaneously [ass -20 one of which is common to said calling cir cuits and the other point is movable into and when the call is completed, a receiver hook,_,*v out of engagement with either of two of and means for‘ operating said closers, the the terminals of said two circuits, and means means forclosing the circuits simultaneously vso for operating the changer during the oper ation of the circuit closer. 7. In a telephone exchange calling device, being controlled by the receiver hook. ' 13. In a telephone'exchange callin I - de 90 " vice, ‘ a rotary intermittent circuit _ c oser;.i' .‘ a plurality of circuits, two of which are each adapted to rotate forward and back, a lock , provided with a pluralit of terminals, a‘ for holding the same against movement,'and" ' circuit closer provided with a plurality of - a movable telephone receiver hook- provided 95 contact makers, a circuit changer having with means for releasing said circuit closer 30 two contact points, one of which is common as the hook is being raised. ' 7 ~ to both of said two. circuits and the other one is movable into and out of engagement with two of the terminals of said two cir cuits before. ‘the closing of one ,of the cir cuits by the action of the last contact maker. 14. In a telephone ,exchange calling de-_. a plurality of circuits, two of which are each provided with a luralit of terminals, a lock and releasing it as the support is being vice, a rotary intermittent ‘circuit closer adapted to rotate forward and back, a lock for holding the same against movement, and 100 a movable telephone receiver support pro 8. In a telephone exchange calling device, vided with a shoulder for engaging, with the . 40 circuit closer provided with a plurality of ., ~ contact makers, a ?nger hold piece for oper raise . a ' ' ~ " ' 15. In a telephone exchange calling de-v 105 vice, two circuits, each provided with'a plu ating the same and having one less hold rality of movable terminals, an intermittent than there are contact makers, a circuit circuit closer for closing one of the circuits changer having two contact points, one of intermittently through a part of the ter minals, a lock' for controlling the movement 110 45 whichis common to said two circuits and the other one is movable into and out of con of one of said terminals and for locking the tact with two of the terminals of said two closer against movement, and means for re- , _ . - v ‘ circuits, and means for movin said changer leasing said lock. 16. In a telephone exchange callingjde before the closing of one of t e circuits by vice, two circuits, each provided with a plu 115 60 the‘ action of the ast contact maker. 9. In a tele hone exchange calling device, rality of terminals, an intermittent circuit a lurality o circuits, a circuit closer pro closer for one of ‘the circuits, and means for’ vi ed with inclined teeth, a‘ ?exible member locking the closer- ‘against movement and projecting into the path of said teeth, a ?n also for holding the terminals of the other ger hold piece for operating the closer, and a circuit changer for changing the circuits - before the last tooth engages said member. circuit separated. v ' 120 17. In a telephone exchange calling de vice, two circuits, each provided with a plu rality of terminals, an intermittent circuit 10. In a telephone exchange calling de vice, a plurality of circuits, two of which I closer for one of the circuits, a lock for hold 121i are each provided with a plurality of ter ing the terminals of the other circuit sepa minals, an intermittent circuit closer and a rated, and a telephonereceiver support pro circuit changer, said changer being provided vided with means for releasing said lock. 18. In a telephone exchange calling de with two contact points, one of which is ?at and common to both of said two circuits and v vice, a plurality of circuits, two of which the other is curved and movable into and out each has a plurality of terminals, means for 130 ' W menace ‘ shaft within the frame, and a“ lock for pre-I ‘ closihg part of, said terminals byjthe tele (venting the movement of the actuator until after the telephone receiver has been re phone receiver hook when it is moved in one direction, and means‘ for closing other of said terminals before the'?rst mentioned part of the terminals are separated when the hook is moved in the ‘opposite direction. 19. In a telephone exchange calling de vice, a plurality of circuits, two of which moved from its support. - v 25. In a telephone exchange calling de vice, a frame, a shaft journaled therein, an actuator and a circuit changer secured to but insulated from the respective ends' of the each has a plurality of terminals, an inter shaft, means for~limiting the movement of mittent circuitvcloser for one of the circuits the actuator,-contacts for on aging with the 75 a receiver hook, means for locking said changer, one of which is e ectrically con-‘ closer against movement, means for unlock- v nected with‘ the frame and two are ada ted ing the circuit-closer when said hook is to engage with the circuit changer ‘a ter-" raised, means for closing part of the ter nately, an intermittent circuit closer mount; ed on the shaft within the frame, and a lock 80 minals of one circuit an releasing the in termittent closer when the telephone re ceiver hook is'moved in one direction, and means for closing a art of the terminals of the other circuit be ore the ?rst mentioned for preventing the movement of the actuator until after‘ the telephone receiver has been‘ removed from its support.‘ _ 26. In a telephone exchange calling de vice, a frame, a shaft journaled therein, an 85 actuator and a circuit changer secured to part of the terminals are separated when the hook is moved in the opposite direction. 20. In 'a telephone exchange calling de vice, a plurality of circuits, two of which each has a plurality of terminals, a receiver 25 hook, means for closing part of the termi nals of one of the circuits by the telephone but insulated from the respective ends of the shaft, means for limiting the movement of the actuator, contacts for enga 'ng with thecircuit chan er,‘one of whrc is elec 90 trically connecte with the frame and two are “adapted to engage with the circuit receiver book when it is moved in one direc tion, and means for simultaneously closing changer alternately,'a ?exible terminal se part of the terminals of the other circuit cured to the frame atone end, an insulated terminal on the frame in position to- be en~ 95 ‘so before said ?rst mentioned art of the ter minals are separated by the ook whenit is gaged by the spring terminal, ~ a toothed wheel on the" shaft in position for en agin moved in the opposite direction. 21. In a telephone exchange calling de with said spring terminal intermittent y an vice, a plurality of circuits‘, part'of which forcing its ‘free end into engagement with each has a plurality of terminals, means for the insulated’terminal, and means for elec 100 closing part of the terminals of one of said trically connecting the circuit changer with said spring terminal so as to pass a current ~ over either one of two circuits. _ circuits when the telephone receiver hook reaches the limit of its upward movement, means for closing other terminals when the ' 410 hook reaches the limit of its downward movement, and means for closin still other of said terminals when the hook is at a point intermediate said limits on its downward ' 27.111 a telephone exchange calling de vice, a frame, a shaft journaled therein, an 105 actuator and a circuit changer secured to but insulated from the respective ends of the shaft, means for limiting the movement of the actuator, ‘contacts for engaging with the movement. 1 . 22. In a telephone exchange calling de circuit changer, one of which is electrically 110 vice, a plurality of circuits, a circuit changer, connected with the frame and two are adapt and means for simultaneously closing the ed to engage with the circuit changer alter terminals of two of said circuits by the nately, a ?exible terminal secured to the descent of the telephone receiver hook, one frame at one end and provided with an in- , 50 of which terminals is adapted to control a clined projection, an insulated terminal on 115 releasing circuit. - the frame 1n position to be engaged by the 23. In a telephone exchange callingldeev ‘spring terminal, a wheel on the shaft pro vided with inclined teeth in position to en vice, a plurality of circuits, a .platefor con trolling1 one of said circuits, a tele hone re= gage with said inclined projection and suc ceiver ook provided with threes oulders, ' ccssively _force the free end of the spring 120 one of which is adapted to engage with said terminal into engagement with the insulated plate, and the other two‘ control respectively” terminal when the ‘wheel is‘moved in one > ~ direction but preventing such engagement the terminals of other of saidjcircults. when the wheel moves in the opposite direc 24. In- a telephone‘ exchan e' calling de @@ vice, a frame, a shaft journa ed therein, an - tion, and means for electrically connecting 125 actuator securedvto one'end'o'ffthe shaft and the circuit changer with the spring terminal a circuit changer'to the-riothemnmeans for , so as‘ to' pass a current over either one, of two‘ limiting the movement of ‘the actuator, con 28. In a telephone exchange calling de tacts for engaging ‘with the changer, an in ice termittent circuit closer-mounted on the vice, a frameaa shaft journaled therein» hav ' circuits. ‘ ' i 1,151,541‘ the shoulder of the, locking arm