US1189525A - Telephone system. - Google Patents

Description

s. BABCOCK, TELEPHONE SYSTEM. APPLICATiON FILED JULYS, 910.

m a M w a a j M 5 M maow m v E v n L Q f ,m MMKM .P WK

' eiice being bad to during ihe co iiection wiij ,new and usefui improvement in eeeeieoii nerecoc' t, c1? mcmme, New yam; eesxenon To TELEGHB NQMETE 1 Z QG'MPAIITY, o1? eocimemze, new 1cm; .e

e ice'e eme coeseoim'rxoii or New $03K.

To all whcm it may conccozz A I Be it known that I, GARRISQN Bzmcocx,

citizen ofi'the United States,

lemme, in the county of Monroe and fBt-ate *ofNew York, have invented a certain dystec f 'of'whichthe following is zi fuii', cieeeconcicc and exact description, refcrings, forming; a, part thGYGOf. o

My invec mod has ior'ite o'bjiecito provide a means at' & substation on; dperty Hume which e message meter a iid time meter are located for ermitting the apparatus 50 be used to deigc M 7 Without actuating she message meter. The apperetus'tiius empiloyed While "1%, permits the si bs cribecteheei" the condition of the ii'n'ejdoesnot howe'ver, permit him to useshe iioe Without actuating such message mem The time meixczpon t cipher hand, is pref embiy'ccimecied so that co iiinu'ed listening" in is reg stered. v

My im'en'cion :Eurflier provides 3111921118 by which the time meter 0? meters associated with a calling Time-cannot be actuated untli eeiied subscriber. Upon the response of the called S\lbS(:11i 1f the zip the response 0:5. 12.13

pmiatiis iccaied a? the exchange is actuated, winch results 111 the connect-ion of mpulse-w opera "veiy connected ao' *3 xcelling line scribeic in addition to the 0 my'inventicn further grovides that after the called subscriber has effected adopter a tive condition in": the impulge-sending meche anism at the exchange further control. of

such impuieesending mechainiem isiemoved during connection The time metering n'iechanisiii located at a sobstaiiion is COl'iEtYl'IC'GQQ so to iregister' the number; of time umts o'j servlce, which un ts are preferably of such a length asto e Sgiecificeticn of i'ictfcers Ieztenc. Y e ucemn filed 111 15, ism. Serial 1%. 57mm 'fesiding at Teiephone .use a, fractional of'bimc, such fractional the accompanying drew iiine Wheihe'n the line is busy ion, and the impulses cii'us sent cc-$11 eie Lhe time meter or ZHQ$$ which me'y be e called, subdeviccslelreiidy: referred I e eiiei therewith so athe spring 12 iiyely oi the message meter 15.

the ceiiing subscribem iselso connected v'vl hthe armai'ure l6 ofthe with thegiivotei point vei of the caliin subscriber and v spring id is connecteo contaci; 3G and one 'berminaifof th'eimnsr fame-wa e e, @164 110% require an excessive nmnber of current rcversaisihrough the calling line for any particular connection and yet short enoughto .i'egistec with practical accuracy. the le igth of time of any conversation, It has beech-and? in practice that; it is advisable to ifiill'i, of in minute as the unit part being inversely proporiipnai to thcddistence, and the unit of service value thus measured is called 2- tclechrc'nc, which may be made up of differentquantities of time and distance values Figure 1 1s a diagrammatic circuit draw-v;

ing of ieiephcne systeny m a'ccordmice with my iiwen'bioii.

'Fig. 2 is adet'aii View of: theniessage metering mechanism. o

As shown in Fig. i, the line wires 1, 2e tend to file, siibstmiions A and A ,Whiie the Y, iiiie Wires 3, e extend from the exchange to "the substatidns and B; Thesubst atioiis b it is to be uncle stood. that each substahon 1s prefer-em cimiiax ly equipped with of the apparatus 1of" sated e1? e1 eingie substation is; e11 that is: necessary in this connection. I d x Theiinewires 1,, QGXEQIKE. from the'syrings wand 6 of the jack J located at the exchange to the terminal posts 7 arid 8, reepectiveiy, at the substation A, the line wire Qheving inciudei. i enchsubstetion a time mctel adapted to be i d acid-rated by mirrenfi reversals in the line circuiiz, each reversaijsorving to advance the 190 metering mecimnism.one unit; The post '1' is' ccmiecizcc through the condenserwwith the coils of the finger1].,end e1soin vpen oi the hook switch E. ,o The post .8 is connected with the othermizei'minzii of Lhe windings 11 of the ringer and. 3150130 the coils13 and 1 which are the setting and actumbingl coiis respeckg The post 8 ringerll and Wi'h the spring 17, adapted to,

ms set position. lithe post 8 is, aico connected with the other fie mi ml 1.01; the resetting; 1105113 and) also to the xhitter T, The other termina'l'of thecoii-L M1: is congested with e spring 22 adapted oiythe switch 21. Else- Q incense transmitter T is connected through the primary winding 25 of the induction coil with the spring 26 of the hook switch H. The springs 27 and 28 of the hook switch are connected together and also to the post 7 The secondary winding 29 of the induction coil is connected in circuit with the receiver R in a manner well known in the art.

The terminals of the transmitter T have secured thereto springs 30 and 31 adapted to be engaged by the upper end of the switch 21 when it is actuated, as a result of which the operation of such switch servesto short; circuit the transmltter and connect itsiternnnals with the post 8, and thus with the line conductor The cord circuit employed in connection with my invention, as shown, consists of a 2-conductor cord, the tip strand consisting of the sections 32 and 33, connected respectively with the tips 34 and 35 of the plugs J and P and being separated by a condenser 36, as is usual in the art. The sleeve strand consists of the sections 37 and 38 connected respectively with the sleeves 39 and 40 of the plugs P and P, such sections being separated by a condenser 41. The sections 32 and 37 of the cord strands have connected therewith the relay magnets 42 and 43, which the supervisory relays of the answering end of the cord circuit, their other termlna s being connected through" wires 14,

and :25 with the pivotal points of the armature 46 and Not the relay 48. The wire it has included serially therein the locking winding l9 of the relay 48. Thestrands 33 and 38 of the cord circuit have connected therewith the windings of the supervisory relay magnets 50 and 51, the other terminals of which are connected by wires 52 and 53 with the positive and negative poles respectively of the battery The wire 52 has serially included therein the main or actuating winding of the relay Sections 33 and 38 of the cord strands extend through the ringing key K, by means of which current from the ringing generator (i may be impressed upon the calling plug P in a manner well known in, the art. An operators set 0 is connected with the strands 32 and 37 of the answering end oi the cord to perznit the operator to receive the order of the calling subscriber. a

The armatures 46 and l? of the relay 48 normally rest against the back contacts 56 and 57, connected by wires 58 and 59 with the negative a lid positive poles res; Actively of the battery "l. The wire :39 is also con mated with the 'lront cont ct 60 of the armaturmdfi. he front contact 61 of the arma ture 47 is connected by wire 62 with the positive brush 63 of a generator G, the negative brush 64: of which is connected with Wire 58 and thus to the negative pole of the battery 54. The generator G is designed so that it is energized, and this is accomplished periodically in the following manner: The winding of the field magnet 65 is connected 68 is closed. The switch 68 is controlled by an electromagnet 70 connected by wires 71 and 72 with the positive and negative poles respectively of the battery 54. The wire 72 has included in it a commutator 73, rotated at a uniform rate by suitable time controlled mechanism, as a result of which the circuit through the magnet 70 is closed at regular recurring intervals. The frequency and duration of such intervals of energization. may obviously be made as desired by properly proportioning and rotating the commutator T3.

The operation of my invention is as follows: Assuming that the subscriber at substation Adesires to call the exchange, he removes his receiver R from the hook switch H, thereby completing a circuit from battery 54: as follows: battery 54, wire 74, line relay 75, line wire 2, time meter 9, armature 16, contact 20, wire T5, wire 76, transmitter T, "primary winding :25, spring 26, spring 27, wire 77, line wire 1, wire 78, and back to battery 54. Line relay 75 is thus energized and closes a. circuit from battery :34 through the line signal 79, indicating to the operator at the exchange that a connection is desired.

he operator thereupon inserts the plugP in the jack J corresponding to the signal 79,

whlch energizes the cut-oil relay by the following circuit: battery 54, wire 59, contact 57, armature 47, wire 45, sleeve supervisory relay 43, cord strand 3?, sleeve 39,

ring 81 of jack J, winding of cut-ofi relay 80, wire 82, wire 78, and back to battery 54. At the same time that the circuit just described is closed and battery 5% is cut off from the line limbs 1 and 2, connection is made from the battery till through the transmil-tor T at the substation A over the following circuit: battery or, wire 59, contact 57, armature 47, wire 45, sleeve supervisory relay 43, cord strand 3?, sleeve 39 of the plug P, sleeve spring (3, line wire 2, time meter 9, Just 8, armature .16, contact 20, wire 75, wire :6, transmitter T, primary winding 25, spring 26, sprin 27, wire 77, post 7, line wire 1 tip spring 5, tip 34 of plug P, tip supervisory relay 42, wire 44, looking wind- 1mg 49 of relay 4:8, armature 46, contact 56,

et the substation B;

telephone set 0, learns the connection. deo sired by the subscriber A, and, assuming that thesuhscriher B is wanted, inserts thecelling P in the jack'd", connected W iththe L line conductors and extending to the substation l3. Thefloperetor there'uponuactilvt v ates the ringing keyK,thuscdnnecting thc generatorG W ith the line limbs3' and 4, and

substation A actua-tes the ringer "11 located t The ringers llnaref all so constructed that when. current does not flow through thcmtlieir er natures'close vthe contacts 20 to short cir'cu t the terminals-of the associated coils 1 3 ofthe message" meters 1 l5.- Upon the response of line wire 2, sleeve generator G", brusht hw 50, cord strand33,

" the generator the subscriber Bic circuit is closed through the line limbs? and as followszhattery 54,- Wire52, energizing Winding 5'5 of relay 4:8,. tip supervisory relay tip of pluggPf, line wire 4:, to and through the apparatus atsub ststionB by e circuit similar-Ito thatabove traced for the su bstationA, returning by line conductor 3, sleeve of plug P, cord strand 88, sleeve supervisory relay 51, wire53, and .backtobattery 54. -V y t As o, result of theflowof'current' through the winding 55, the crmatures" 46 and; i7 are attracted, thus connecting;- the supervisory relsys 4,2 and i3 withtlie positivepole of thei battery 54 and thepositive brush ofthe. gen-'1 crater G respectively. this time the circuitthrough the controlling magnet is open, the current in the line cirf cuit is reversed as follows; batteryffri wire 59, contact 69, armature 46, looking wind} ing 49, wire 4A, tip supervisory relay lQ', tip

, 3i, tip spring 5, line wire 1, through-the oppore-tug at the substatiomA in the reverse I to that above; traced, returningby spring (5,"sleeye 39, sleeve supervisory relay i3, wire 45, armature 47, contact 6].,wirc 62, brush 63, -arrrmture of ire 58, and back to Thus the armature winding of i G I is" included in circuit at this time, but as theffield circuit is open only the ohmic resistance oi the {armature direction battery ,1 is included, and this is sosma-llias tovh'cve I V flow through practically no eiiect upon the current flow. I lit is to be noted that the current sent out over the line wires 1 and 2 previousto the energizction ofthe relay v48 causesqwcurrcnt flow through the windings of the ringerll follows: line xvii-e2, time meter 9, posts,

' Spring 4 theglinewire 1:, i

8, wire 7T,post; .It is to be noted ia the direction of cur-' the .s o the ringer; 11 is. is. the some direction during the-signeh ing oi the exchange the sulostutioirA end during disconnect on,ortheensweringend of the 6011 1 totheliiiewircs l andflbe short-'circuiting each other, thus Assuming that at t 5 .the energizing win'ding hold the armature 16 in 'ts normal position, 7

short circuiting the resetting coil 13 of the v I 15. hen the relay i8 is en A ergized,"and, as above described, current flows from the positive pole of]; the battery I 54=-out over line conductor 1, ill be 0b'- message meter served that the direction of current flow vthrough the vringerwindings '11. is reversed, as a result of which the armature 16 is m moved .eway from the contactQO, opening the short-circuit across the terniinalsof the coil13', which thereupon receives current in a direction to more theleft-hand end of. the arnieturew downward to cause, the erma ture to occupy its set-;position, (for, which ;j position the springs 17 and 18 are moved into engagement with each other, thusz-igain the coil 13 p to prevent iiur'- themmature 19,until the actuating coil 1 'is energizedfl-It is tops notedtthat the m tio n above described Cree armature 19 to its set \positionbrings the springs 22 and 23 into engegementf with closing at one point the em, erg'izin'g circultofthe coil 1.4. The srme ture's'id and M are held in their attracted'gg position as long as the switchhiook at the substation is in its revised or talkingposi-t" tion,' cnd even if the switch be subsequently movejyo its normal position, opening the; circu; throughthe/supervisory re ther operation of 55, thelockiug'vv nd r ing 4 9 is so proportioned as to retain the zip natures l6 and 47 in'theircttracted 'posi tron as long asthecurrent such locking winding,due' to the switch hook 5 at theswbstation A being in its upper or talking position. I After the relay durin the time that vthe armctures 47 are held in their cttractedposition, arnmture of the generator G is retained in I the circuit above described. The generator; G" is so constructed asto produce en elec-Q tromo'tive force about twice that-of the bet 48 'has been energized and 46 1 and tery 54, andsinc'e its negative brush64: is iisf connected with the negetiveterminal of the battery 54;, the electromotive force developedpartly consumed in charging the battery r 54 during tli'e'intermls that the field 65 is r portion oftheelec- J20 energized,- the remaining tromotive force developed by the generator i being impressed upon the circuit in which, 5

its armutureis connected as follows: positive I Wire: 45, relcy, 4J3, sleeve 39, sleeve spring U through the appirrotusp wire .59., battery 54:, ire 58,to theregeti'ie E1 9 lay mend the o v aun ;plac1ng the receiver R battery,

brush 64'of the generator Gr. Thus, during the intervals that th field of the generator' is energized current is impressed upon the line circuit in the same direction by the generator G as the current was caused to flow through such line circuit by the battery 54; before the energization of the relay 48 from which it follows that the successive energization at recurring intervals of the field 65 of the generator G reverses the direction of current flow periodicully through, the line conductors l and 2, therefore, causes actuation of the time hismeter therefore serves to reglisten the length of time H1 htelechllQhes between the response of the called subscriber and the restoration of th apparatus at the callingt substation to itsnormal condition by upon the hook switch It is to be noted also that the current generated by the generator G flows through the battery si l in a direction opposed to the normal direction of current flow from such and that therefore during the active of the generator G the battery 55L 1S 0 a'rged.

Assume now that the condition of a ratus described above has been produced by a call from the substation A, as a result of which the apparatus at the substation B is connected therewith in. the manner above described, and that during such a connection the subscriber at substation A, before making a call, wishes to learn if the party line 1, 2 is busy, he first depresses his trey 2.1 thereby shortcircuitiug the terminals of the transmitter T, and also short-circuiting the terminals of the setting magnet 13 of his message meter 15, such short-circuit being traced. through wire 76, contact 31, switch 21 and wire 84. With the switch 21 in its actuated position the receiver R is removed from the switch H, and the primary winding 25 is thereby connected in circuit with the line wires 1 and 2, as above described, and the subscriber at substation A can hear ppa- . whether the line busy. The operation of the switch 21 serves to pilotezttnc resetting coil 13 from the flow of current from the line wires 1 and 2 ii. at this instant it should occur that the direction of current flow in such line wires was that required to separate the armature 16 of the ringer 11 from the contact 20. Thus the subscriber at station A is afforded a means vfor determining the condition of the party line to which be is connected without having u call charged up against him, but he is unable, to hold a conversation at this time since his transmit: ter T is ghort-circuited. Were it not for the short-circuiting of the resetting coil 12; during the operation of listening-in to dowrmine whether the line is busy, the armature 19 might be moved to its set positiornassuming that the direction of current flow in l substation, and that a connection has the line-1, 2 was proper to cause this result, and this would cause a closure of the contacts 22 and 23, as a result of which the hanging up of the receiver R would complete the circuit through the actuating winding 14; and even if the direction of current flow at this time were not that required to actuate the magnet 14, a subsequent reversal of direction, due to the continued connection at substation A, would serve to actuate the magnet 1%, thus advancing the message meter 15 one unit.

It is to be observed that during the entire period of listening-in with the switch 21 depressed, whether the interval be long or short, the time meter 9 is connected in circuit, and thus a means is aiiorded for indi: cating the total length of time in telechrones that the apparatus at the substation A is operatively connected, Whether as a result of initiating a connection or listening-in on a connection already established. Assuming again that the substation A is the calling been effected with the substation ll, at the termination of the conversation the receiver R is placeduponthe hook switch ll, at which time the armature 19 is in a position closing the contacts 22 and 523, since the first reversal of current in the line wires 1 and 2 resulting from the completed talking cir cult serves to move the armature to such position, and a circuit is therefore closed through the actuating winding 1-1 as follows: Clhcnviiuling 14 is preferably so constructed that under the influence of the permanent magnet 86 it requires current from battery M to actuate it rather than current from the generator G, as a result of which the contacts 22 and 23 maintain in closed condition thc circuit through the relays -12 and 43 and locking winding ll), as above described, although such circuit is open at the contacts 12 and oi the hook switch H. uring; an inoperative interval of the genera tor G, current flows as follows: battery 5%, wire contact [30, armature 46, looking winding all, wire all, relay i2, ti Ill, tip spring :3, line wire 1, post i wire 77, spring 28, spring Ell, wire 85, springs 23, spring 22, actuatiup coil lei, post 8 time meter 9, line wire 2, sleeve spring 6, sleeve 39, relay 43, wire 45, arn'iature a'i", contact 61, wire ()2, brush 63, armature of generator G, brush 6%, wire 58, back to battery (J-l. his causes the energization of the actuating coil lei, moving the armature 19 to the posh tion indicated in the drawings, as a result of which the contacts 522 and 23 are separated from each other, thereby opening the circuit through the relays 42 and and the locking winding t ll, as a result of which the relay -18 is deencrgizerl--assuiniug that the subscriber B has hung up his receiver before the subscriber A. has done so. If, however,

up his receiver, the relay 4% Tel m ing the circuit through. the sn pe B lmnging'up his receiver,

would occur if the relay nee;

at this time the subscriber E immediately upon Elle enbscriber it is dc .rgizecl since the circuit through the 1 v ei'gifin Winding 55 is opened endflzlie l gized, but

ing L9 is at this time we in. opcmfin inon.

From the above ii; will. be neiicecl-eiiei; si e control of the relay 4:8, new i; DEHCQG-ILGYW gized, rests Willi the caliingsubscriber, since suchvrel'ay can only be deiinergiz eillayopen-- lav 4-2 associated of the cord circiiinencl eh:

pe'eteclly energized and actuation of ilhe switch substation. Theserepemhecl ciirientiei ei'siils ing subscriber if he were Waiting current flow in the calling Smaller.

face e plurality toward She ratchet to which motion of the armature 19 is ine theffiiction of thenioving pertsmay particularly eimo'ying to the 'celk fore second connection and had his reeeiyeifofif eke switch-hook after tlie'conversetion with elie subscriber B'liacl been 'teitininetecl. filingstliey undesirable result of: leeving'iliemelay i8 under ine conm'ol of the calledsnbscriber would be that actilsition of thci'lelmy l8 by the liook 'switch at we celleclwsnbetetion wculfl result-in reversing the clirection'of v line a reater number of izimes than would lJQ-illfiifl would lie sse if the reversal were due entirely to the time"; controlled mechanism at iilie eizclmnge and thus an added registration Gfl'illitll e-l Wou'lclresult, and iheqnetei would the number of telechi'onee as the epi'gzirent c service giventhe calling subsmtion whereas the actual amount of service would; be

As shown in 2, the unitsqwlieel15 of the message nickel-*1!) liaee'xtentling from its of pins 15?, extending v wheel 15v, secured to the Wheel 15, which ratchet \ilieel is sniliciently displaced from theiinits Wheels 15"tliat the pins 15" clear the actuating pawl 15 carried byiiille armature 19 ofthemetei'. The nrmw time 19 also carries a1 i'igiclq rojecting arm- 19 adapted :0 move bizt'weentwo oiiiiie pine 15! when, islic airmatm'c 15) is actuaieclfln Such a manne i AS- he prevent tlieol d Vance of the units wheel 15? beyomlits proper poeition tended to move it. The pins and'tlie aim L19 thus constitute amechanism for preventing the jovertln'mv oi the units wheel I 15, due to its inertia. A liolcling pawl 15*? is proviclcd to engage the rat-chebflwheel i5 when the Wheel 15 mlvancedyso tliiit'one of the pins ifi is nearly or ("mile in engage merit with-vibe m ni 19. This provides ialifi made; very small ailii we the einstmen of the ecfiiiai ing a without danger oi": false operation for ,ilie use of "QllSUbScrlbBi 't'mnsmissien e'nd disabling originating: substations, of telephone lines exiencimg from :iubet such subsections for registering pawl may be s.

ne her clilection of theunits wheel 15. i w I While niyeyteni is jsl10wn herein as ep m pliccl to a manual telephcne systemcitisito;

be ender stood that it is equally applicable 1 to any telephone system, whether meniielflr Y automatic, in which cnrrent is snpplieci at exchange tlifi-englisuiteble means toe con 7 g motion to operate RlBfiGTSil'S the substations, While 1 have shown my invention initlie peptieular emli ocliments herein clescl ibeii vl lo not, however,' liinibfmyselii to this 6911; I sti'nciiiqinbni desire aid-claim any equivalent 5 thei nieyfsnggesifi itself to those slcill egl in. the Mir J i Wilhai; I claim is: I I 1, fl1ti e tel QllOIlfi syste neinployinge amie for seiriice'lva segl upon the number of mefiw and i; e iduretion of conize 'setiom originetin eubstetions, the combination, cfibeleplione' lines exteiuling fromeubstev tionewto" an exchange, time meter one OfSllC-ll subsst-etions forjregistering the len fiiii w of time the substationiein use for outgoing 'inessage's, a mesaafge meter 3 suchsi bstelsicii for recording the number of" outgoingckima llfiGi'lQIlS fiStlbllSllQi and, means 'lfaSQGlljGilr with the message metereiid 'trensmittef "a? oegselole ofiprevey;

&

ing out-going transmission and, Qisaiilin meecnge meteix I 2. in .El, 'teleplicneeysiem employing m for service besecl ujiicnjtlie nuinbei" oflniesnilw sages and origineiingnt s ii osbatione, the co nbin'zltie'n of telephone lines eiifiencling frem SulJSflmli ii'oiis to an Xcl enge, e meterfiefbyon of such substations for iregistering falie lengi of time the substation talking epparetusqie innse for outgoing messages only, e meesegeq meter for outgoing messages only also aw finelysubstation, means for the iseiof til subscriber capable ofipreve tiny; outgem 11m the outgoing; inessegefliiieter, seijclfmeans being furtlie capable of per i tting incoming transn si on and the operiition olf 'blietime mete 3. line telephone sys'ieni employing; a, e, for service baeelf ipon the mznibenof me sages i ncl -ilie filtration of conversaions tjliejconibinciiion. i

tions so an exchange tl enlengfih a:

oi time the substation telking eppamt ie/is in use, a inessagemetennt sucl i substation:

for recording the, number of 'connection.s1es-w tabl'ished and means i for connecting siichcep alfi f pzi 'ntus with the line I sages and the duration of conversations originating at substations, the combination of telephone lines extending from substations to an exchange, a time meter at one of such substations for registering the length of timethe substation talking apparatus is in use, a message meter at such substation, means for the use of the subscriber capable of preventing outgoing transmission of voice currents from the substation and disabling the message meter.

5. In a telephone for service based upon the number of messages and the duration originating at substations, the combination.

i .at a substation of talking apparatus, a time neously connecting meter adapted to record the duration of outgoing messages, a message meter adapted to record the atlve y connecting the transmitter.

6. In a telephone system employing a rate for servicc'based upon the number of messages and the duration of conversations the combination at a substation of talking apparatus, a time meters in operative condition, and means for connecting such apparatus and simultaneously disabling the message meter and transmitter only.

7. In a telephone system employing a rate for service based upon the numb sages ,and the duration of conversations originating atsubstations, the combination at a substation of talking apparatus, a time meters operative condition, and for operatively connecting such apparatus (1 simultaneously disabling. one-1 of such meters without interruptmglincoming transsubstations having 8,111 afitelephone tem employin a rate for-service based ugh the number if messages; and he. duration of conversations at substations, the combination of talking apparatus, a time means for simul tancously connecting such apparatus and meters in operative condition and means for operatively connecting the receiver of the talkingapparatus and simultaneously connecting in operative condition but one of said meters.

9. In a telephone system, the combination of telephone lines extending from substations to an exchange, one or more of such apparatus comprising a transmitter, a receiver, a time meter autosystem employing a rate of conversations er of mestion at i nutter,

matically controlled by two different sources of current, controlled by the called subscriber and a message meter, and means. for opcratively connecting-the receiver and one of such meters to the corresponding line without operatively connecting the other meter.

10. In a telephone system, the combination of telephone lines extending from substations to an exchange, one or more of such substations having apparatus comprising a transmitter, a receiver. .a time meter and a message meter, and 'm rails for operatively connecting the receiver and one of such meters and simultaneously disabling the transmitter and the other meter.

11. In a telephone system, the combination of telephone lines extending from substations toan exchange, one or more of such substations having apparatus comprising a transmitter, a receiver, a time meter and a message meter, means for operatively connecting all of such apparatus to the corresponding line, and means for operatively connecting the receiver and one of such meters, and simultaneously disabling the transmitter and the other meter.

12. In atelephone system. the combination of telephone lines extending from sub stations to an exchange, one or more of such substations having apparatus comprisin a transmitter, a receiver, a time meter and a message meter, a hook switch for connectin the meters and talking apparatus with the line conductors, and a switch adapted when operated to short-circuit the transmitter and the message meter without interfering with the operation of the receiver and time meter.

3. In a telephone system, the combine a substation of a receiver, a twins :1 time meter, a message meter, and means for operatively connecting the receiver and one of such meters and simultaneously disabling the transmitter and the other meter.

14. In atelephone system, the combination at a substation of a receiver, a transmitter, a time meter, a message meter, means for operatively connecting all of such appir ratus to the corresponding line, and means for-operatively connecting the receiver and one of such meters and simultaneously dis ablingIthe transmitter and the other meter.

a substation of a receiver, a trans a time meter, a message meter, a hook switch for connecting the meters and the line conductors, an a switch adapted .When operated to. short-circuit the transmitter and the mes: sage meter without interfering with the operation of the receiver and time meter,

In a telephone system, the combination of telephone lines extending from substations to an'exchange, two sources of curn a telephone system, the combinarent upp y; sources, a meter endtalking a prising e'receiver and transm "such substationsand means for 'operetively ppaiatus com- I connecting the receiver with the line ithout ing subscriber, and; means? at the exchange operatively connecting suchmeter and transoperable by the called subscriber for act-mat mitten. i x ingythetime meter, theoperationof such 1 7 In e telephone system, th combina "means serving to remove it from the control tion'of telephonelinesextending from sub fof, the celled subscriber and place it under; 1o, stationsto an excharfgmytwo sources of cur-, the controlof the calling subscriber;

rent supply eutomsti'celly c control r-fo'r oneci'of said sour talking *epparatus at 0 comprising a receiver an cos, a; meter and ne suc emitted, m

a time control: for one of said.

itter at one of ontrolled, s; time J T h substations. d trensmittenmeans stations for registering thejlength oftiine the substati r at such substation auto e= message mete matically recording cells; initiated, by, at cell 23, In a telephone system, the combine 1 tion of telephone stations "to an exchange, nism htthe exchange 'for too switching mecli nnectingthe lines for'connecting such apparatus and meter. in for conversation, a timeme'ter at one of such 3 operative condition andfmeans for connect-T substations forregiste'ring thelength of time I ing the receiver with the line and atthe lthesubstationtelking apparatus iscinuse, av same time disabling such meter and transmessage meteriat such substation nntometi mitter. f l i cally recording calls initiatedbye "calling 2o 18. In a, telephone system, the combines subscriber, m'eansfor connecting'the receiver tionof "a receiver, two sources of current Iofthetalkingapparetuswith the line vithsupply automatically controlled, at tim ic'onout operz tiyely connecting such iII IBSSfi gG trol for one of said sources, etransmitter, a meter, and means at the exchange 'opereble meter, and mennsfor operutively connecting by the called subscriber forectueting the Y the receiver without operutively connecting time-meter, theoperetion of such mennsigc the meter and transmitter; serving toremoye-it fromuthe'control of the 19.111 a telephone system, the combinzicalled subscriber. i i c I M tion of e receivergtwo, sources'of current -2 l, In a telephone-system, 'the conibinev s'upplyautomaticeily controlled, :1 ti'inelpon tiono'f telephone lines extending from sub- 1 trolfor one of saiclsources, e-ztronsmitter, a, 1 stations to an exchange, switching Inccha'-. 93 meter and means fortoperatively connecting nisin'zit theeztchz nge forconnecting the lines; the receiver without op'eratively' connecting for conversatiomn time meterzit one of. such the meter and at thesame timedisehling the substations. for registering the length "of time transmitter. I i j the substation talking apparatus is innse, n l 20.111 a telephone" system, the combinamess21ge meter at suchsubstationm tonmth m "'tion of a receiver, two sources of current. celly recording cells initiated byn culling 'supply'automaticnlly controlled, :1, time con; itsubscriber, means forco'nnecting thercceiver trol for'one of'sziidisources', atransmitten, a ofl thetalking apperntuswith thelinewith meter, means for'operatively connectingthe 'outf.operetively connecting such message receiver, transmittefand meter, andmeim's meter,, nnd m a st h x h nge p a e 'for-opera,tively connecting the receiver with by the called subscriber for nctuz'ttingthe I ur, tiv ly connecting the meter endaat time meter, the operation of such means q thesame time disabling the transmitter. serving to remove it from the control of; the 21'. In a, telephoneisystem, t11 .;;0 bimL-; "called subscriber and pleceitunder thecon-. e5 tion'oftelephonelinesextending from subtrol of'the calling subscriber. I l 11g stations'to an exchange, switching mechrh c 25.1mm telephone system, the combine;

nism at the exchange for connecting the,,ti'on of telephone line t ndingfrom sulw lines for, conversationend two sources of stations to aneXchengeswitching meshe constant current of different character, a nism et the exchange for connecting the I time meter at one' of such sub stutionsifor lines. for conversatiome time meternt one 115 registering the length-of time the substation of such substations for registering; the t lki g tus is inns'e, a message'meter length f, time thesubstation talking apps; at such substationautomatically recording rat'usisin nse,-n message meteri at such s cellsjinitiated by a calling subscriberyand stationfmeans for connecting c'theireceiyers v meens'st the exchangeoperable by the celled of the'talking" apparatus with theli'ne end- 32s subscriber for actuatingthe time meter, the "simultaneously disabling, themesscge matey operation of suchmeans seryingf toremoveit' and meanest-the exchange operable by the from the control bffthecalled subscriberl called subscriber-for actuatingthe tinie [22. In etele'phone system, the combinak vmeter,"the operation of such mea'nsseryin i 1 "tion of telephone lines extending from; sub to remoye itg rom thecontrcl of the calls stetionsto' an exchange, switching" mech'av1 subscriben 3 i g (:nis er, change for connecting the lines; 26: In e telephone; system? the comhin" fdi co versa'tionand two souroesiofconstent; tionof'felephone lines extendingrfrom so curren 'of-diiierent cherecter automatically" stations toan"exchange,,switchizrgfm e meme-on oi suchlsub 'nism et 'the-exchengeffor ionnectin t ontalking apparatusis in use,"

lines extending fromsub-g; Y

' transmitter,

message met a-,

lines for conversation, a time meter at one of such substations for registering the length or" time the substation talking apparatus is ill use, a message meter at such substation,- means for connecting the receiver of the talking apparatus with the line and simultaneously disabling the message meter, and means at the exchange operable by the called subsiizribcr for actuating the time meter, the operation of such means servin to remove it from the control of the called subscriber and place it under the control of the calling subscriber.

537. In a telephone system, the combination of telephone lines extending from substations to an exchange, one or more of such substations liming apparatus comprising a a receiver, a time meter and a cord circuits at the exchange for connecting the lines for conversation provided with two sources of current of differ-cut character, and means at the exchange operable by the called subscriber for actuating the time meter of the calling subscriber, the operation of such means serving to remove it from the control of the called subscriber.

28. In a telephone system, the combine tion of telephone lines extending from substations to an exchange, one or more of such substations having apparatus-tomprising a transmitter, a receiver, a time meter and a message meter, cord circuits at the exchange for connecting the lines for conversation provided with two sources of current of different character, and means at the exchange operable by the called subscriber for actuat 111g the time meter of the calling subscriber, the operation of such means serving to remove it from the control ofthe called subscriber and place it under the control of the calling subscriber.

29. In a telephone system, the combination of telephone lines extending from substations to an exchange, one or more of such substations having apparatus comprising a transmitter, a receiver, a time meter and a message meter, means for operatively connccting the receiver and one of such meters to the corresponding line without operatively connecting the other meter, cord circults at the exchange for connecting the lines for conversation, and means at the exchange operable by the called subscriber for actuating the time meter ofthe calling subscriber, the operation of such means servin to remove it from the control of the called subscriber.

30. In a telephone system, the combination of telephone lines extending from sub stations to an exchange, one or more of such substations having apparatus comprising a transmitter, a receiver, a time meter and a message meter, means for operatively conmeeting the receiver and one of such meters for connecting .for connecting the lines for transmitter, a receiver, a time meter and a.

message meter, cord circuits at the exchange the lines for conversation, means for operatively connecting all of such apparatus to the corresponding line, means for operatively connecting the receiver and one of such'meters and simultaneously dis-- abling the transmitter and the other meter, time controlled impulse sending mechanism, and a relay adapted tobe actuated by response of the called subscriber to connect such mechanism to the calling line, such relay having a locking winding in circuit closed through the answering connection of the cord circuit.

32. In a telephone system, the combination of telephone lines extending from substations to an exchange, one or more of such substations having apparatus comprising a transmitter, a receiver, a time meter and a message meter, cord circuits at the exchange conversation, means for operatively connecting all of such apparatus to the corresponding line, means for operatiyely connecting the receiver and one of sucu meters and simultaneously disabling the transmitter and the other meter, time controlled 1 upulse sending mechanism, and a relay adapted to be actuated by response of the called subscriber to connect such mechanism to the calling line; such relay having a locking winding in circuit closed through the answering. connection of the .cord circuit and the apparatus at the calling substation.

33. In a telephone system, the combination of telephone lines each extending from aplurality of substations to change switching mechanism for connecting the lines for conversation, a time controlled source of current. a time meter at one of such substations, for registering the length of time the substation talking apparatus is in use for outgoing messages, a message meter at such substation, automatically recor ing calls initiated by a calling subscribenand means at the exchange operable by the called subscriber for actuating the time meter, the operation of such means serving to remove it from the control of the called subscriber.

system, the combine a central ex-- 34. In a telephone system, the combina tion of telephone lines each extendingfrom a plurality of substations to an exchange, switching mechanism at the exchange for connecting thelines for conversation, a time meter at one of suchsubstations for registe'ring the length of time the substation talking apparatusis 1n use, vamessage meter 7 the called, subscriber and place itunder the the lines time meter control of the calling subscriber,

' 35. In a telephone system, the combination of telephone lines each extending from a plurality of substations to an exchange, switching mechanism at the exchange or connecting the lines for conversation, a 'at oneof such substations for the length of time the substation in use, a message meter means for connecting registering talking apparatus is at such substation, such apparatus with neously disabling the message meter,and means at the exchange operable by, the called subscriber for actuating the time meter, the operation of such means "serving toremove it from the control of the ealled subscriber; I g

36. In a telephone system,-the co .tion of telephone lines each extending a plurality of, substations to an exchange, one or more of such substations having aps paratus comprising a transmitter, a re? ceiver, a time meter and a messa e meter for automatically recording calls lnitiated by a callingsubscriber, means for opera tively connecting the receiver and one of such metersto the corresponding line Without operativelyiconnecting the other meter, cord circuits at theexchangefor connecting for conversation, and means at the exchange operable by the called subscriber for actuating the time met er," the operation of such means serving to remove it from the control of the called subscriber and place it under the control of the calling subscriber.

37 In a. telephone system, the combination of telephone lines each extending from a pluralityof substations'to an' exchange, one or more of such substations having apparatus comprising a transmitter, a receiver, a time meter and a message meter, cord circuits at the exchange forconnecting the lines T for conversation, means for operati'vely connecting all of such apparatus to theco'rre- 'sponding line, means for operatively connectingthe receiver and one of such meters? and simultaneously disabling the transmitter adapted to be actuated the line and simultameter of said substation..

for listening in on and transmitter of Y to operate time meters,

and the other meter, time controlled impulse sending mechanism, and

actuated by response, of the called subscriber to connect such mechanism to the calling line, such relay having a, locking winding incircuit closed through themswering connection of the cord circuit. l 38. In a telephone system, the combination of telephone lines each-extending from atplurality of substations to an exchange, one or more of such substations havingap paratus comprising a transmitter, a receiver,

a timerneter anda message meter, cordcir-a cults at the exchange for connecting the lines for conversation,

means for operatively connecting all of-such apparatus tovthe cor-- responding line, means for opcrativelycona 'necting the receiver andvoneof such meters andsimultaneously disabling the transmitter and the other meter, time controlled impulse sending mechanism, and a relayby response of the called subscriber to connect such mechanism to the calling line, such relay having a locking winding in circuit closed throughrtheanswering connection of the cord circuit and the apparatus at the calling substation? 39; In a telephone system, ,a time controlled source of current, aparty line having a plurality of substations, message an time'me'tersat one or more of such stations adapted to be. actuated by current reversal 1n the line, and means for listening in on the lineat one or more of the substations a relay adapted to doc so i

when busy without actuating the message 40. In a telephone system, the combination of telephone lines each extending from a plurality of substations to an exchange, a. time controlled source of current atthe ex change tooperate time meters, a time meter at one of. such substations for registering the length of time the substation talking apparatus is in use for outgoing messages-a message meter at such substation and means tion' without actuating the message meter the talking apparatus. 41. In a telephone system, the coinbination oi telephone lines-each extending from a plurality of substations to an exchaiuge, a s

time controlled source, of current at the ex;- change to'operate the meters, one or more of such substations prising a, transmitter, meter and message listening in on a busy the'.message meter.

v4:2. In a tel phone system, the combinaa v lines each extending from 1 aplurality of substations-toad exchange, switching mechanism at the exchange for tion of telephone connecting the lines for conversation, a time controlled source of current at the exchange a'bu'sy line atsuchstahaving apparatus coma receiver, a time 1 meter and means for line without actuating a time meter at one 13e of such substations for registeringthe length of time the substation talking cppzo ratus is in use for outgoing messages, it message meter at such substation, means ut the exchange operable by the called subscriber for actuating the time meter, the operation of such means serving to remove 1t from the control of the called subscriber and means for listening in on a busy line Without actusting the message meter.

43. In a. telephone syste1n, the combination of telephone lines each extending; from a plurality of substations to an exchange, one or more of such substations having epperatus comprising e transmitter, a time controlled source of current at the exchange to operate the meters, a receiver, a time nnd' it message meter, of cord circuits at the eX- change for connecting the lines for convern action, means at the exchange operable by the called subscriber for actuating the time meter, the opcretlon of such means serving sources is of a periodic character, and means operuhie by response from the called subscriber to connect said periodic source with the, ceiling subscribers circuit.

In witness whereof, I hereunto subscribe my name this 29th day of June, A. D., 1910.

GARRISON BABCOOK. Witnesses: ALBERT C. BELL, Lnoneno E. Boom-1.

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