US1057500A - Lock-out switch for party telephone-lines. - Google Patents

Description

'J. G. ROBERTS.

LOCK-OUT SWITCH FOR PARTY TELEPHONE LINES. APPLICATION FILED JULY 26,1906.

lywmgmao rW-{ I Patented Apr. 1, 1913.

3 SHEETS-SHEET 1.

J. G. ROBERTS. LOCK-OUT SWITCH FOR PARTY TELEPHONE LINES.

APPLICATION FILED JULY 25, 1906.

Patented Apr. 1, 1913.

3 SHEETS-SHEET 2.

A J. G. ROBERTS.

LOCK-OUT SWITCH FOR PARTY TELEPHONE LINES.

APPLICATION FILED JULY 26, 1906.

l,@57',5@, Patented Apr. 1, 1913.

3 SHEETSSHEET 3,

- in question "Finn i i MHY'W mm "34 iiiiii ie ir s ii) @ii JOHN G. ROBERTS,

PANY, GF CI-IICAGQ, ILLINQIS,

OF CHICAGO, ILLHG'GIS, ASSIG-NOR Ti} WESTERN ELEGTRIC COI2I- A CQBPGRATIOW F ILLENQIS.

LUCK-OUT JITCH EE'GR 'EEI'LEEEflNE LEWET 0 all whom it may concern:

Be it known that L Jenn ROBERTS? citizen of the i l nitcd States, residing at: Chicago, in the county of Cook and State of illinois. have invented a certain new and useful Improvement in Lock-Gut Switches for Farty Tielephone-Lines, of "which the following is :1V full, clear, concise, anti Bf-7516i description.

My im -entio-n relates to lockout switch for party telephone lines, anti. has for its object to provide an improved and simplified device whereby any two or more stations of a party line may be connected for conversation to the exclusion (it-other stetions on the line.

tienerailv so my invention con tein 'ilates a ijaivitcl'iingz, Pie/vice comgifising electromagznct adapted to advzuice a ratchet, togg etl'ier with contact mechanism adapted to ie operated and locked by mechanical means actuated said magnet, after the ratchet has been advanced a nredeteroiineii distance, the Contact mechanism being automatically released when the ratchet; is returned to no!- inai positioi'i. Y

The switch of my invention, as preterahly onstrnctccl, is provided with a polarized electrmnagnot adaptcfi when supplied with currentoi preilcterinini-id direction to advance 2i ratchet, which as it leaves new real posit-ion, opens the talking circuit of the station where the sameis located. When the ratchet: has been arlvzinccd a number of stops corresponding to the station where it. is located, mechanical means are placed in con. (lit-ion to be operated by the magnet when given an impulse of current of the opposite direction to release a spring-actustcct arm', which closes and locks switch springs to c nnplete the talking circuit of the station The ratchet may he then a l vanceci to the end of its movement, and at the termination of convcrsa'tion hy applying to the magnet an impulse of current; of the same direction. as that inst referred to, the ratchet is released, and returns to nor: mal position, restoring the saiC to normal condition,

a fl pecifieatioxi of Electors anti opening the switch intent.

Ayn it Anglication filed 3' My 26, 1906 lilo springs, and also closing the normally exist ing talking circuit 1 wil describe my invention more portion larly byreference to the accompanying drawings, wherein Figure 1 is a front elevation of a locking switch embodying my invention; Fi 2 is a side elevation thereof; i 3 is pion sectional view on line 33 of 1; Fig, is a plan sectionalview on line i eto" l8 5 1; Fig. 5 is a fragmentary cietoii view; i 6 is a'din illustrating a circuit; in

rny improved switch may employed.

illie same letters of reference indicate the some parts wherever they are shown;

Referring first to Figs. 1 to 5, o poiarizcot ino gnetlis provicieci with a tiiting armature 3 carrying an. min 3 upon ivliicn mounted a. stepping pawl for a ratchet, 5 The ratchet, ween in normal position, engages contact spring (3 which is mounted upon, but insulated from the frame of the device,

and also engages a; contact post 7 carried by,

but insulated from, theatre-me Mounted upon the same shaft, with the ratchet 5 is a disk 8, having a notch or groove 9 in its periphery adapted when the atcliethas been advanced a number of steps correspoiniing to the station where the switch is located, to receive a pin 10 carrie61 by a (log 1' pivotally connected to one enti of a lever 12 which is pivoteii Eu. approximately its central point to the frame of the device. ThFf'rce end of the (log 11 carries ii book 13 adapted when the dog 11 falls, due to the pin 10 riding: into the groove 5) of disk 8, to assume a position, with relation to a pin 14 carried by a stepping pawl 4, such that when the magnet l isgiven a reverse impulse of current of a direction to move the arm 3 backward or to the right in Fig 1 said pin engages the hooker-latch.

13 and moves the (log 11 torock theiever 12 on its nivot.

The lower end of the lever is prov. i with a groove or cut-away portion town 1;:

a shoulder lii upon whirl: norinaiiy re. s a pin it) carrier} by a pivoted arm 7, v-Jhich is coni'iectcii. :it its opposite C3114]: an a spring 18 secured to the frame of the device. Said arm 17 is adapted'when the pin 16 is disengaged from the-shoulder of lever 12,

upon the rocking of lever 12 as previously I described, to be moved by spring 18 to cause ,an insulating button 19 carried thereby to force a spring 20 into engagement with contact anvils 21-22; these may, control the connection of the subs cribers telephoneset with the line. The ratchet 5'wh1le at the limit of its forward movement engages an insulated contact spring 7 carried by the frame.

A release finger 23 is mounted upon a pin position to. be engaged by the, pin 14 of the 0' the retaining pawl fromengagement witii' pawl 4 when the magnet is given an im-v pulse of current infthe same direction as the impulse previously referred to'for rocking .thea'rm 3. When thearm '3 is thus moved to the right the pin 14 rocks the finger 23.

on its axis and causes-the same to engage a pin 27 carried by the springactuated'retainf ing pawl 28 of ratchet 5', thereby-movin I the ratchet 5 and permitting the same to r'ea turn to normal position. As the ratchet ap preaches normal position the pin 25 thereof rides along an inclined lip 29 carried by the pivoted arm 17 and moves the same to permit the separation of thee rings 20,21, 22, and. the engagement of pin-16 of said arm 17 withthe shoulder 15' of the lever'.12.

Upon the returner the stepping pawl 4 to normal position, the releaseto normal position.-

Referring now to Fig. 6, I' will describe the o'perationof my improved locking switch in connection with a party telephone'line finger '23 falls eystem The telephone set at, each station 1s normally in operativerelation tothe limbs 31,

32, of the line, which extend to a springjack 33 and line drop 34 m: the central office, A hand generator [.39 isprowded at each station normally 'm a circuit extending from the pole 35 of saidgenerator through normal ly closed conta'cts of key-36, to contact 6, which is normally engagement with the ratchet 5, a'nd thence by way of conductors 37,38, to limb 32 of the line,- through the line drop '34, and'back over limb 3.1 of the line, conductors 38, 39,- through cpntact'sof keyht to the pole 40-015 the 'ringmgfgenen' ator. A subscriber of a party line desiring to secure a connection with another subscriber, first operates the hand generator 30 at his station'to display the target of the i I line annunciator at the central office. 1 The tors 42, 43, of. her cord. circuit, with the limbs 31, ,32', of the line. She thereupon depresses her answering key 44 whereupon substation extendingovei' limb 3'1, conductors 38, 45, switch lever, secondary Wind-.

conductor 46, thence to contact 7, which is normally in engagement with, the'ratchet '37, 38, to the otherlimb 32 of. the line.

vW's will assume that subscriber at sta the same line. The operator, after receiv r' brushes 48, .49, of an interrupter 50 with the face of' the interrupter by means of a suitable magnetic clutch or the'like. The constation of the party line; "A ke. 58 is provided for each static 'adapteffwhen d e pressed'to be locked in L'uch conditionby the armature 59 of a magnet 60.

pair of contacts 51, 52, which represent sta tion No. 1, a circuitiiscompleted from the brush 48,- link conductor 42, limb 31 of the line, conductor 38,. at' hll the stations of of the locking switches, baclr/tolimb 32 of the line, link eo'nduct@ 43,contact brush 49,

battery The magnets 1 atall' the stations will thereupon operate to advance operator, seeingtlie signal displayed, in-I, serts her answering-plug 41 in jack 33 of the line and thereby connects the link conduc- 'wheel 5, and thence by way of conductors tion No.1 of the party line desires to'converse with subscriber, at station No! 2' of ing theorder of subscriber at station-.1, re- 'moves'plug-41 from; the spring-jack 33, inserts therein the mate plug 41 -.andoperates. the keys 58 representing said. stations. She then vactuates her key47 to start the'brush'es [48, 49. This 'key 47 connects. contact the line, through-fillspolarized magnets 1" conductors 52 to the negative pole of the her telephone set is connected withthe limbs j 31', 32, of the. line, the" talking circuit at the I ing of theinduction coil, telephone receiver,

limbs"31, 32, of-the line, and also starts said i brushes rothting over the contacts on the tact brushes 48,- 49, their movemenuengage pairs of contacts 51-, 52', contacts 51. whereof are connected with, the positive pole of a: battery 53, while the contacts 52 areconneeted withv the. negative pole .of said 1' battery; Between each painof. contacts 51, J 52,is located apair of contacts 5455, the contacts 55'being connected with thejposie tive pole ofbattery, while the contacts 54 are connected with conductors 56 leading. through .normally open contacts 57 of keys 58 to the negative pole ofbattery53. A. set

of said contacts54, 55, is provided: for each stationfthe contacts representing. each star" tion. being placed in position to be engaged M by thecontact brushes after the same have engaged the number ofpairs'of-contacts51, 52, corre sponding' to the number of such;

' When the, brushes 48, 49, engage the first I I I 120,

positive pole of battery 53- to contact'51,v

iso

jug the ratchets their'ratchets 5 one step. it will now be seen that at station No. 1 the pin 10 rests in the groove 9 of segment 8, and the latch 18 of dog 11 is in position to be engaged by the pin 14 When the magnet receives a reverse impulse. The contact brushes 4%, 49, next eigage the terminals ,54, 55, Which represent station No. 1, whereupon current flows from the positive pole of battery 53, through contacts 55, brush 49, link conductor 43, limb 32 of the line, through conductor S8, and magnet 1 at each of the stations, back to limb 31 of the line, link conductor 42, brush 48, terminal 54, through contacts 5'? of lrey 58, to the negative pole of battery The magnet l of all the-stations now receives an impulse of current in the opposite direction to that required for advancbut since only at the switch at station 1 is the dog in position to be engaged by the pin 14 of stepping pawl 4, the talking circuit of station 1 will be the only one completed. The (log 11 at station 1 is therefore moved by pawl 4 to efi'ect the release of arm. 17, which is now moved by spring 18 to close contact springs 20, 2 22.

The contact brushes 48, 49, next engage the second set of terminals 51, 52, and the magnets 1 Will receive current of a direction to cause the same to advance their ratchets one step; and as the brushes 48, 49, engage the terminals 54, 55, representing station No. 2, a reverse impulse Will be sent through the magnets just as previously described to cause the closure and'locking of springs 20, 21, 22, at stat-ion 2, as outlined in connection with station 1. The telephone appara tus of stations 1 and 2 are new the only ones in operative relation to the limbs 31, 32, of the line.

he brushes 48, 49, now proceed over the contacts and advance the ratchets at all the stations to the limit of their forward move ment, after which the brushes 48, 49, engage segments 61, (32, respectively. Segn'ient (ll is connected through the armature and. back contact of a relay 63 to the positive pole of ha ttery 53, While the segment 62 is connected with the negative pole of said battery.

While the brushes are in engagementwith their segments, the contact brush 48 is connected through a segment 4 with a contact spring which is connected with a conductor (36 leading through magnet (53 to the negative pole of battery 53, a circuit thus being com pleted for relay (33 from the positive pole of battery 53, through the armati r and back contact of relay (33, segment 6i, brush 48, segment 64, spring (35, conductor 66, including relay 63, to the negative pole of battery The relay 63 thus serves to interinittently interrupt the circuit extending from the positive pole of battery 53, through the armature and back contact of relay 63, segment 61, brush 48, linlc conductor 42,

limb 31 of the line, through the bell at each of the sta ions Nos, 1 and 2, through springs 20, 21, 22, contact 7 closed by the ratchet While at the limit of its movement, conductors 37, 38, limb 32 of the line, link conductor 43, brush 49, segment 62, to the negative pole of battery 53, The bells at the two stations are thus operated. After the arms 48, 49,'leave the segments 61, 62, they engage a pair of contacts '67, 58, to cornplete a circuit for the magnet (50, which attracts its armature 59 and releases the keys 58. This circuit may be traced as follows: from one terminal of magnet 60, to switch contact 68, moving contact 49, through call.- ing key 47, to the ring of the cord plug 41, ring oi jack 33, line conductor 32, substation conductor 88, line conductor 31, spring of jack 33, tip of plug 41, key 47, moving contact 48, fixed contact 67, to positive pole of battery 53, through said battery to the other terminal of magnet 60. Suitable means may be provided for stopping the brushes at the end of their revolution.

The talking circuit of each substation now extends from. the limb ill of the line, couductor conductor 45, to the switch hook, secondary Winding of the induction coil, telephone receiver, conductor 46, through springs 20, 22, contacts 7, ratchet 5, conductors 37, to the limb 32 of the line.

r t the end of com'ersation the subscribers operate their hand generators and keys 3G to altect the display of the clearing out annunciator at the central oliicc, whereupon. the operator actuates her key 69 to connect the battery 53 with the link conductors 42, 4.3, to apply current to the magnets 1. of all the substations to cause the same to move their arms 3 to the right and rock the fingers 23 to remove the retaining pawls 28 from ei'igagement with the ratchots 5, permitting the restoration of the apparatus to norma condition. .lhc key 36 may also be used in connection with the generator 30 for emergency calls tron) any of the substations, even though they be locked out.

The key 70 permits the ringing oi the subscrilusrs bells-subsequent to the normal ringing period detern'iiued by the automatic switch 50.

I claim:

1. In a switching device, the combination with a ratchet, of a polarized magnet rot spoils-ire to current of one polarity for advancing the same, contact mechanism; and spring-actuated means, released by said magnet, in responding to current oi"opposite polarity after advancing the ratchet a predetermined distance, for operating said contact. mechanism. l

2. in a switching device, the combination with a ratchet, of. a magnet for advancing said ratchet, contact springs, a springactuated arm normally tending to close said springs, a lock for said arm normally pre- 'releasing said arm actuated by said magnet venting the operation thereof, and means for after-advancing the ratchet a predetermined distance.

In a switching device, the combination with a ratchet; of a magnet for advancing the same, contact springs, an arm, .a spring connected therewith, normally tending to move-said arm to crate saidsprings, a.

pivoted lever norrna lv holding 'saidyarm against movement, an means, operated by i said magnet afteradvancingthe ratchet 11 predetermined distance, for tripping said lever.

4-. Ina switching device, the combination with a ratchet, of a magnet "for advancing the same, Contact springs, a pivoted arm, a

'springn'ormally tending to rock said arm to operate said springs, a pivoted lever having a shoulder thereon, a pin carried by said arm'normally engagingsaidshoulder to prevent movement of the arm, and mechanical means, operated by said magnet after advancing the ratchet a predetermineddia tance, for rocking said lever to disengage said shoulder and pin.

5. In a switching device, the combination with a ratchet, of a magnet for advancing said ratchet, contact springs, a lever controlling the operation and locking thereof, and mechanical means, operated by magnet when said ratchet has been advanced a predetermined Idistance, for actuating I said lever 6. In, aswitchingdevice, the combination with a ratcheh'of astepping pawl. therefor,

a magnetfor operating said. pawl to advance the ratchet, clmtact-sprlngs, a lever control- .hngthe operation and locking thereof, a dog carried by said lever, and means operated when the ratchet. has been advanced a pre-' determined distance, for bringing said dog "in-position to be operated by said'step'ping pawl to actuate said leven '2. In aswitching device, the combination with a ratchet, of a stepping pawl therefor carrying a pin, a polarized magnet for operatingsaid pawl in response to current of one directionto advance the ratchet, contact springs, alever controlling the operation and locking thereof, a dog carried hyisaid leverhaving ahook at the free end thereof, and means operated when said ratchet has .oppositepo a I '2. In ,a switching device, the combinat on I with a ratchet, of a magnet for-advancinglever to operate said springs.

notation direction to advance said ratchet, contact spmngs, a rockmglever controll ng the operation of said springs, a dop carrled by Said lever having a hook at its iree end, a disk mounted-1 to move with said retchet and havinga notch in its peri phery at a predeteev m ned point, a pin carried. hy'said' dog, Ed?

ing upon the periphery. of said dislgend adapted'when theratchet-end dish have adva'nced, predetermined distance to enter said notch and present said hook in; position to he engaged by. said. pawl, whenoperated by said ma%net 1nresponding-to current of J rarity;

the same, contact springs, ansarm, a spring connected. therewith normally tending to move said arm. to operate said. 'springs, a pivoted lever normally holding said arm against movement, a dislemoving; with saidratchet, means controlled by said disk and magnet, after the ratchet has been advanced" a predetermined distance, for tripping s aid 10. Inc switching device, the combination witha ratchet, o t'a stepping pawl therefor,"

.a polarized magnet for'o crating said'pawl in response to current or one directiom to advance the ratchet, contact springs, a pivoted-arm', a spr ng connected therewith nor ing said arm againstmovement, a dog carried by saidlever havinga hook at the-free end tl1(lI'G0f, ardisk moving with said ratchet, and means control-led by said disk, after the ratchet has been advanced-a predetermined mally tending to move said arm: to operate said springs, a pivoted levernormally holdj distance, forbringing said hook in position to he engaged by said stepping pawl when said. magnet responds to current of reversepolarity.

11. Ina switching device, the combination with a ratchet, ota magnet for'advancmg connected therewith normally, tending to move said'arm to operate said. spli'i g 9 pivoted lever normally holding said arm against movement, mechanical means, operated'hy said magnet'atter advancing the ratchet a predetermined distance, [for tripping, said lever, and means operated when the ratchet returns to normal position for the same, Contact springs, an arm, a spring elfecting'the engagement'of said arm and lever.

12. in a switching dev1ce,-the comhlnation with a ratchet, of a magnet tor advancing the same contact 5 )iin- 's a ivoted arm a v 9 l") 7 3 spring connected with one end thereof and normally'tending to rock said arm to operate said springs, 21 pivoted lever having a shoulder thereon, a pin carried by said arm normally engaging said shoulder to preventmovement the arm, means operated bysaid magnet after advancing the ratchet a In Witness whereof I hereunto subscribe predetermined distance, for rocking said my name this 21st day of July A. D, 1906. to lever to disengage said shoulder and pin, an 1 inclined lip upon said arm, and a pin carried JOHN G. ROBERTS.

by said ratchet adapted When the same returns to normal position to engage said lip Witnesses:

I and effect the rengagement of the pin upon CLARENCE A Comm,

the arm and said shoulder. E. F. BEAUBIEN.

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