USRE14236E - Assigstoh - Google Patents

Description

BEST AVAILABLE com L N. REYNOLDS.

eEsT AvAaLABLE coml UNITED sfrATns rArnNT OFFICE.

JOHN NEWBEBRY REYNOLDS, OF GREENWICH,

CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, A. CORPORATION OF NEW YORK.

LINE-SWITCH.

Original No. 1,131,734, dated March 16,'

Specification of Ressued Letters Patent. ligigsu'd Ijg 26g j 916 1915, Serial .No 766,879, filed May 10, 1913. Application for reissue med June s', 1315. sexier No. 32,977.

To all 'whomit mag/concern: v

Be it known that I, .Tenn N. Rnrnonos, a citizen of the y 'United States, residing,` at Greenwich, in the county olf Fairfield and State of Connecticut, have invented al eertainnew .and useful Improvement in Line- Switches, of which the following is a. full, clear, concise, and exact f lesoription.

This linvention relates to a, telephone switch and is particularly designed .for use as a line switch, although it roay be used for other purposes.l This switcl in thel ei'nhodiment herein disclosed, may arranged to serve a group of one hundred subscribers lines and a Corresponding group olf trunk lines.

tion between incoming; lilies and outgoing lines may be effected by the sueeessive rotary movement of a. pair ot l "i 's or shafts.'

Another object the provision of a simple switch structure of this type by means of which large groups of lines may he served.

Still another object of this -ivention is the provision of combined inerhanical and electrical testine' means for normally maintaining a plurality of trunks definitely preselected whereby they 'will oe successively united with lines on which calls have been initiated.

Other objects and advantages will appear from time to time as the deserig'ition of the invention progresses.

The embodiment of the apparatus herein disclosed comprises essentially a plurality of rotatable line bars or shafts,y each having.; inultipled sets of contacts, one for each trunk and a plurality oi rotatable trunlr bars arranged at right angles to the'line bars, each trunk har having niultipled sets i of contacts, one for each line har, and means Referring new to the drawing, l, 2, 3 aad- 4 represent Yframe ineinhers which are rigidly vin the traine ineinher 3.

secured together, the opposite members oeing substantially parallel. Pivotally tmounted between the members l and 3 is a plurality of line hars or shafts 5. Each ol' these bars is provided at one end with a right angular extension G through which projeuts a pivot pin 'l'. The other end also has a right-angular extension 8 from which pro! jee-ts a pivot pin 9 received by an aperture 5 hl'itjnsulated therefrom and from ea-Ch other are three eonfflueting strips il), .ll and 'l2 provided with the integral multiply C611-, nerted Contact springs 1?, 1l and lo respec tively. llaeh line har would carry as niany of these sets et eontacts there are trunk. bars in. the structure.

llivotally inolinted bet\\'eei| the frame members and is a plurality of trunk hars or shafts lli, one being, provided l'or eachtrunk or cf'mneeting circuit 'Jl`hese hars are pivotally mounted by ineens-oi the impure.

tures in the right-angular extensions and1 1S each end thereof reeeiviug the pins 19 an O respectively. Secured to the llrars l but insi'ilated therefrom and frein each other are three Conducting strips 2l., 29 and 23. yliliese strips are provided with a plural' c oi sets of integral springcou tacts Ll. o and 2G respectively, one set be1 in g' provided for each line liar at the switch, or for each .Subsc ihers line in the group. r.Fliese sets of springs project from the hars oi the sets at their adjacent points or, in other words, at their pointl et' intersection. Projecting from the en fusion l? o eaeh trunk ha tained in rei -aeled position hy a spring 2Q. Pivotall Cured to the, bar il is a vplurality of ralch members Q9, onel for each trunk bar, adapted when the trun'k bar is rotated in clockwise dir tion to engage and hold the fateli niei'nlz" W' Springs il() are pri'lvided for holdin he catch members in their operative position. Secured to the catch niemoers El are armatures 3l ot the trip ning nets' respectively.

llotatably mounted parallel to the bar i and adjacent to the levers 2 is a set rod 33. This rod is provided with a plurality of spi* rally arranged pins 3l, one foreach lever Q7.

',ihesz .plus ara so arranged that one at a' Seeured to the. hars is a catch lever 27 normally re bar having the particular lever 27 v BEST AVAILABLE CCP;y

gitudinal movement of the set rod 33 to the left, -as viewed in the drawings, the trunk engaged will be rotated into set or selected position.

This longitudinal movement of the rod 33 is caused by Ithe armature 35 of the electromagnet 36 engaging the end of set rod 33 asv clearly shozvn in the drawings.

Rotative' with but slidably mounted on the rod 33 is a ratchet wheel 37 and operatively related thereto is a pawl 38 carried by the armature 39 of the electromagnet 4U, by means of which the set rod may be rotated. Slidably but non-rotatably mounted on the bar 33, near the left end thereof, is a collar 4l. Secured to this collar adapted upon rotation of the set rod 33 to traverse the test contacts43. The wiper 42 is of suflicient size to bridge the distance between two adjacent test contacts 43. Mounted for wiping engagement with the 'collar 41 is a brush 44. A leaf spring 45,

against which the end of the rod 33 bears, is provided for returning the set rod to its normal position. Arranged for engagement by the spring 45 is a contact operating meinber 46 having projecting lugs 47 and 48. Coperating with the lug 47 is a pair of springs 49 and 50, c, atar. between which is interrupted only at the moment the rod 33 reaches the end of its travel. Arranged for coperation with the lug 48 is a pair of cone tact springs 51 and 52. The spring 51 is provided with a cam projection 53. Upon the movement'of the rod 33 to the left the lug 48 engages the upper side of the vcam projection 53. Upon the return movement, however, the lug 48 passes under the/cam proiection 53, causing a momentary engagem n of contacts 51 and 52.

Mounted on the frame member 3, one for each line bar, is a plurality of'electromagnets 55. Each magnet 55 is provided with a pivoted' armature 56 having a right-angular projection 57 ending in a cam member 58. Projecting upwardly from each vline bar 5 and in a position for engagement by its respective cam member 58 is a pin 59 by means of which the line bar may be rotated upon attraction of the armature 56. Upon further attraction of the armature 56 the shoulder 60 on the member 57 is arranged to engage the pin 9 in such a manner as to force the line bar to the left, as viewed in the drawing. Springs 61and G2 are provided for returning the line bar to its normal position. A set of contacts G3, 64 and 65 are arranged to be operated by a projecting finger 66 on the armature 56. These springs are so arranged that Contact 65 is closed before contacts 63 and 64 are opened.

Secured to each trunk bar is an insulating projection 67 which upon clockwise rotation of'the bar to its set or selected positionl is arranged to engage and close the normally 1s a Wiper 42 lease is held to the left byits catch 29, and als that one of the pins 34 on the rod 33 is in operative position to the lever 27 of a bar associated with an idle trunk. Thus normally one of the bars or shafts 16 is always rotated to its preselected position and another bar 16 is ready for preseleetion, that is,.one of the pins 34 on the rod 33 is in such relation to the lever 27 of a bar associated with another idle trunk, that upon a longitudinal movement of rod 33, it will force lever 27 into engagement with its catch 29. By preselecting two bars 16 for successive operation, when two calls are originated practically simultaneously, no delay is necessitated in waiting for' the extension of the same.

Upon the snloseriber at A removing his receiver from the hook, a circuit will be completed from battery 63 through winding 70 of relay 71, contacts 63, side l of the line, telephone apparatus at the substation, side Z2 of the line, contacts 84, and winding 72 of electromagnet 71 to ground. Hela Y 71 is thereupon energized and completes through its armature a. circuit from battery 69, through said armature and contact, conductor 73, and winding of electromagnet 55 to ground. Armature 56 is thereupon attracted and through engagement of the cam 58 with the pin 59 on the line bar causes said line bar to rotate. The rotation of the line bar 5 causes the contactl terminals 13, 14 and 15 to move downwardly, thus posi tioning one set of terminals in operative re lation to the contacts 24, 25 and 26 respectively oi' the set or preselected trunk. Upon the furtherl attraction of the armature 58, the engagement of the shoulder' 80 with pin 9 forces the bar 5 to the left, bringing the contacts or'l the line bar/into i'irm engagement with the trunk terminals. and, also moving the unengage'd terminals of the line bar to a position where they will not be enf gaged by the terminals on another trunk bar. Upon engagement'of the line terminals 13 and 14 with the trunk terminals 24 and lio iEsT AvAieweLE cop..

Another branch from the conductor 82 extends to the test contact 43 individual to the selected trunk for a purpose to be hereinafter specified.

The energizing circuit just traced through the eleetromagnet 32 causes its armature to be attracted, carrying with it the catch member 29 and thus releasing the trunk bar which is returned to its norniial position by its spring 28.' The terminals of the set which are in engagement with the line terg minals, however, remain in contacttherewith due 'to-the flexibility of said terminals. The other sets of terminals carried by the trunk bar are rotated in an anti-clockwise direction or to the right, viewed in the drawings, to place them in a position where they will not be engaged by the terniinals carried by the bar oi the next calling line.

The attraction of the armature S1 of inagnet 32 closed its Contact Sl', thus completing a circuit tor the relay 85, from battery, through the winding S6 of said relay, conductor 87, conductor 88, and contact Slt to ground. The relay is thereupon en rgiaecl and attracts its armatures S0 and 00. "he attraction ofi armature 00 completes a holding circuit for said, relay trom battery through the Winding 91, conductor 92, contact springs and 49, conductor 93, eontact and armature'QO to ground. The at traction ofthe ari'nature 89 completes a cir cuit from battery Sie, through magnet. 30., conductor 95, normally closed Contact 96,

-eonduetor 97, armature S9 and Contact to ground. The electromagnet 36 by the attraction of its armature 35 causes the set rod to move-I to the left, and by means of the linger 34: now in position to engage a lever 27 ot' the'seleeted trunk. causes the respective trunk bar to assume a set position ready for engagement by the line terminals on the bar ol the nekt line to call.

As the engagement between 'contacts el?) and 50 is not broken until the set rod reaches approximately the end oi stroke, the complete travel. of the rod is assured. vllhen the rod reaches the end of its travel, the rontarts Li9 and 50are separated, interrupt,- ing the holding circuit for the relay F35, ca using its armatures tofall bach interrupt- -lay 98 from battery, through contacts 52, 51,

conductor 9S), and Winding of the said relay to earth. The relay is thereupon energized and attracts its armatures 100 and 101. The attraction of the arinature 100 completes a holding circuit for the te'st relay, .from battery 80, through armature S1 audcontact, conductor 82,- test contact L'l-i, wiper 42, brush 441-, conductor 10Q-,contact and armature 100, wiudiiig of said relay togl-ound. The attraction of the armature 101 coinpletes a steppingV circuit for the stepping magnet -10 from-.battery 103, Winding of electroinagnet 40, conductor, 104, armature 101 and contact,l through interrupter 105 to ground. The attraction. oll the armature 39 of eleetroinagnet 40 causes through the pawl 3S the rotation of the set rod 33 to successively position the line'ers 31'; in operative relation to the levers :l et the treni; liars. As long as the Wiper 4Q in engagement with a 'test Contact ,2l of a busy ltrunk line upon which battery potential impressed from battery 80, the test relay vill hold up and the stepping circuit will remain coin-- pleted, the set rod being rotated by the suecessive energizatlon and denergiization ot the eleetroinagnet 40 due to the breaking of' its circuit by the iuterrupter 105. YVhen, however, the `viper reaches a test contact i3 of an idle trunk, no battery potential will be thereon and the test relay 98 will become deenergized. The retraction of the armature 101 will'opeu the stepping circuit for the magnet 10, thus stopping the set rod ,33 with one or the ngers 34 in operative relation to lever 27, whereby upon the longitudinal movement of the set rod the trunk bar will be rotated to set position, thus leaving the apparatus in position for the reception of the next call. Upon the initiation of the next call and the `lirstactuation oi' rod 33 (Longitudinal movement) the finger 311 which is in position to engage the lever "27 oi" the trunk bar which is ready forpreselection, vfill Torce this lever 27 into engagement with its associated catch 20.

Upon the calling subscriber' hanging up his receiver at the termination of the cor- --tionl the circuit for the relay 74C is inted, and the retraction of its armature S1 the holding circuit for the electroi The denergization oiE the electroniagnet causes the retraction of its armature thus releasing the line bar which is thereupon returned t1) normal by the springs (i1 and carrying therewith the ter A'mals 13 1% and 15, previously in enilo BEST AvAaAsLE COP tasse Jes.

`erated parte to normal with the exception of the selected trunk which is now in set position. 4

life havenow described. the complete cycle ot operation. Briefly described this cycle is as follows: At all times one ot the trunk hars `will he in set or retracted position. New upon. the initiation ot a call", the line har will he first rotated' to cause engagement ot the line terminals with the trunk terminals at the point oi intersectitmot thel hars, and then moved longitudinallir to remove the multiple terminals from the path ot other trunk terminals. fhe engagement of the line terminals with the trunk terminals operates to effect the. completion of a circuit for the trip magnet .individual to the trunk bar, whereby the ha r is released and returned, with the exception ot' the terminal ot the engaged set, to normal position. yThe attraction of the armature 3l of electromagnet 32, in, addition to releasing the trunk har, completes the circuit tor the relay which at its right arn'iature Si) closes a circuit for the set magnet 36, which upon its energization canses the next trunk har to he rotated and set in the manner previously' described. The return to normal of the set rod 33 momentarily closes contacts 51,52, causing the energization ot the test relay 9S.- The attraction ot the right armature et the relay 98 closes a holding circuit therefor through the wiper l2 and. the testcontact 43. rifhe attractionot the lell armature completes a stepping circuit vfor thc stepping magnet 40, thus causing the rotation of the set rod which continues lo rotate until the wiper 42 engages a test Contact Il associatedk with an idle trunk, when the test g relay circuit will he interrupted and all parts, with the exception ot the set trunk har, will loe returned to normal position.

lt is to he understood that the circuits employed 'with this switch in a complete tele* phone system would diii'er in some reslviects from those here shown. in such a. complete system, means would preterahly he provided for interrupting the leads 73 to all the line magnets at thc switch from the time a .locking circuit was completed from battery S0 for the. magnet ot the calling line7 until the rod had heen rotated to place a finger opposite a lever 27 of the har ot the second next idle trunk.

A s many modifications and minor changes in the invention described will readily suggest then'isclves to any one skilled in the art,

l do not wish. to he limited to the details of construction herein disclosed, lint only by the scope of the appended claims.

l. in a switch, a group ot terminals at said switch, a group of other circuit terminals for engagement with said first circuit terminals, groups ot rotatable shafts other circuit terminals ar anged for engagement with said line terminals respectively, groups ot' hars arranged adjacent to each other in intersecting planes, and means for rotating a. har of each group in a predetermined order, whereby engagement of a line terminal. with one ot said other circuit terminals will he effected.

ai. in ai, telephone system, subscribers? lines and trunk lines, an exchange, terminals of said lines and trunk lines respectively at said exchange, and means ior connecting said line terminals to said trunk terminals, said means comprising rotatable hars individual to said subscribers lines and said trunk lines respectively.

ln a switch, a` plurality or" line hars and trunl-z oars pivotally mounted adjacent lach other in intersecting planes, mnltipled terminals of said lines and ci said trunks on said line hars and trunk hars respectively, and means for successively rotating said liars, whereby engagement between said line terminals and trunk terminals may he etl'ected.

(i. ln ay switch.. the combination of-sets of intersecting shafts, Contact sets at the intern sections ot said shafts, means, eliective upon successive angular displacement et a shaft ot one setand a shaft or therother set, hut inefective upon such displacement ot' the shatts in reverse order, for operating con* tact set.

7. ln a switch, the combination of sets ot intersectingy shafts, Contact sets at the intersections ot' said shafts, means effective upon conjoint angular displacement of two intersecting shat'ts t'or operating `a Contact set, andelectromagnets for rocking said shafts.

'8. ln combination a pair of telephone circuits, a switch associated therewith, rotata-v lile. shafts, terminals ot said circuits carried h v 'said shafts respectively, said terminals being so arranged that the successive rotation ot' said shafts will cause interengagement thereof.

f). ln combination, two groups ci cir cuits, a switch associated therewith, termi nals ot each group at said switch, sets of rotatahle shafts, the'shafts ot one set being ics? ies

BEST AVAlLABLE COFA one of said shafts longitudinally and for reversely rotating the other to position-the unengaged terminals of each out o' the line of travel ota 'the terminals carried by the shafts of the other set.

19. In combination, a group of calling lines7 a group of trunks, automatic switching means for extending any of said calling lines to any of said trunks, means for preselecting a plurality of said trunks for seizure in succession by calling lines7 and electrical testing means ,torrcontrolling the peration of said last mentioned means.

20. in combination, two groups of lines, a plurality of switching means for connect-- ing a` line of one group to a free line of the other group, mechanical means for preselecting one of said switching means for operation, and electrical testing means for select-- ing another one ot said switching means for the successive operation.

2l. in combination, incoming lines and outgoing lines, terminals for said incoming lines5 switching devices each vcarrying the movable terminals of one of said outgoing lines, electromagnetic means t'or actuating said movable terminals adapted to connect a calling incoming line to an outgoing line, means for physically preselecting one of said switching devices and means for electrically allotting .for preselection another. of said switching devices.

22. in combination, two groups ont lines7 means for extending a calling line of one group to a free line of the other group7 mechanical means :tor preselecting one line of said other group and electrical testing means for definitely allotting for mechanical preselection another line of said other group.

23. ln a telephone exchange system7 incoming lines and outgoing lines, normally lasse inactive contacts for each of said'lines, actuating devices for causing engagement of the contacts of said incoming lines with the contacts of said outgoing lines, means for maintaining an idle one of said contacts in an actuated position for first operation and electrical testing :means for predetermining an idle inactive contact for second operation.

2i. ln combination, incoming lines and outgoing lines, terminals for said incoming lines, switching devices, each carrying movable terminals of one of said outgoing lines7 electromagnetic means for actuating said movable terminals to connect With the terminals of calling incoming lines, au electromagneticjmeohanism for moving an idle one .of Said 'movable terminals into a position in which it may engage the terminals of a calling incoming line, and electrical testing means for definitely allotting another one of said movable terminals for said movement.

25. ln combination, incoming lines and outgoing lines, a switch compnising tivo sets ci rotatable shafts, the shafts of one set being at an angle to those oiz the other5 contact terminals of said incoming and outgoing lines carried by the shafts of said sets respectively, means whereby the rotation of a shaft oft each set ina denite order Will effect engagement of their respective contacts, and means comprisinga movable rod whereby some one ot the shafts of one set is normally maintained rotated to a set position and another one of the shafts of said set is preselected for rotation. v

ln Witness whereof, I hereunto subscribe my name this th day of May 1915.

JOHN NEWBERRY REYNOLDS.

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