US1703837A - Relay - Google Patents

Description

Feb. 26, 1929. 1503,83?

s, M. DAY

RELAY Filed April 9, 1920 4 sheets-sheet 1 I e. I. I

I I I I uw I 1 I I l A'TTORNEY.

Feb. 26, 1929. 1,703,837

S. M. DAY

RELAY Filed April 9, 1920 i 4 SheetS-Sheet 2 4 Fla. 2. 14

r is.. N

15 15 lnsula'ion lnsulalion f5-A 1 l F- Feb. 26, 1929. 1,703,837

s. M. DAY

RELAY Filed April 9, 1920 4 sheets-sheet 5 am as Feb. 25, 1929. 1,703,837

s. M. DAY

RELAY Filed April 9, 1920 4 sheetawsneet 4 Mmm/A114414 B l? l M424 TM Patented Feb. 26, 1929.

UNITED STATES PATENT OFFICE.

SALISBURY M. DAY, OF ROCHESTER, NEW YORK, ASSIGNOR TO GENERAL RAILWAY SIGNAL COMPANY, 0F ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

RELAY.

Application filed April 9,

This invention relates to direct current relays of the tractive type especially designed for use in railway signal systems. The principal object of the in vention to improve and simplifyv the construction of relays of this type, particularly with the view of providing an organization of parts which can be readily combined or adjusted to lit the various working conditions and requirements .found in practice. Other detail objects and advantages will appear hereinafter.

In describing the invention in detail reference will be made to the accompanying drawings in which like reference characters refer to corresponding parts in the several views, and in. which Figure l is a longitudinal section through a relay embodying the invention organized as a neutral relay;

Fig. 2 .is a vertical transverse section on the line 2 2 in Fig. l;

Fig. B is a plan view of the parts in the enclosed compartment of the relay, the top plate and coils being removed, this view showing the arrangement of parts for a neutral-polar relay;

Fi 4f, is a fragmentary vertical section taken substantially on the line lf-il in Fig. 3;

Fig. 5 is an enlarged view of the rear bracket. said view being taken on the line 5-5 in, Fig. l.;

Fig. S is a fragmentary view showing how the relay may be spring supported on a wall so as to be protected from j ar and vibration;

Fig. 7 a detail section of one of the in sulating studs for supporting the contact fingers;

Fig. S is a fragmentary View of a contact linger having a carbon or graphite contact elementg Fig. 9 is a fragmentary View of the corner of the relay case, in horizontal section, showing an alternative construction of the glass side walls.

Referring to the accompanying drawings, I have shown my relay organized as a neutral (Fi l and 2) and as a neutral-polar Y, (Figs. 3 and l) the change being made from one type to the other by merely adding or changirw` certain parts. I will describe .first the con reaction of the parts common to both types and then the additional parts and changes required to make up a neutral-polar relay.

My improved relay comprises in general a.

1920. Serial No. 372,585.

top plate or panel l, a bottom plate or base 2, and glass side walls the whole forming the enclosed chamber or compartment containing the contacts and moving parts of the device. The top plate l is made of molded porcelain which is preferably unglazed so that certain surfaces may be finished or ground, and which, after such finishing, is dipped into insulating varnish or similar solution. The base 2 is preferably made of aluminum or similar rustless alloy, or it may be made of iron suitably protected against rust. The glass walls 3 on the four sides of the relay may be molded in one piece, as shown in Fig. 3, or made up'of separate plates connected together at their adjacent edges by sheet metal clips 4;, as shown in Fig. 9. The top plate l and the base 2 are connected by three long screws 5 and 6 6, the two front screws GMS being surrounded by a bushing or sleeve 7 of suitable insulating material, in order to avoid accidental grounding of the circuit controlling parts of the relay to the metallic base 2. The top plate l is cut away around its edge to provide a recess or rabbet to receive a. gasket 8. Similarly, the outer edges of the base 2 are eut away or depressed to receive a similar gasket. These gaskets 8 are preferably made of cork and are shellaccd in place. I find cork preferable to felt for this purpose because it does not absorb moisture and conduct it into the relay compartment. It should be noted that there is no led ge or lip around the lower edge of the glass walls 3 to catch water.

In order to permit interchange of air from outside and inside the relay cfnnpartment, I provide a Ventilating opening'in the bottom which is filled with a line mesh gauze 9 fastened to an eyelet pressed into the hole in the base 2. In case the special conditions do not require suoli ventilation, the mesh of the screen 9 may be filled 'with paint or the like.

A bracket l0, suliistantially inverted ,U- shape (see Figs. l and is fastened to the top plate l along its rear by a long screw 5 and two other screws ll. The hole in the bracket l0 and top plate l for the long screw 5 is made large enough to permit this screw being inserted from the top with the bracket and its attachments in place. The bracket l() affords a convenient handle or grip for carrying the relay. and also supports a terminal block 12 for the line connections and the coil leads. The terminal block preferably made of porcelain, and is fastened to a shelf-like projection integral with the bracket by screws 13 having their heads countersunk in said block. Three binding posts v14 of the usual construction are fastened to this terminal block, the heads ofsaid binding post seing countersunk in recesses in 'the underside of said block. The recesses in the terminal block for the screws 13 and the binding post 14 are preferably filled withsealing wax or similar material. In the sides of the bracket are holes 15 for receiving screws or similar fastening devices so that the relay may be supported on a wall. p

In the top plate 1 is a large rectangular hole 1o (see Fig. l) over which is fastened by screws 18 a coil support or plate 17 of brass, aluminum or similar non-magnetic material, the surface of the top plate 1 around this hole 16 being ground to form a tight joint with the coil support 17. 0n the coil support 17 are mounted the usual pair of coils 19 which have cores 2O pressed into holes in enlarged square pole pieces 21, said pole pieces being fastened to the coil suppo'rt'17 by screws 22. The cores 2O are connected at their upper ends by the usual back strap 28 of magnetic material. The coils 19 are taped and impregnated, and are held against. movement between the back strap 23 and thecoil support 17 by inserting the requisite number of thin insulating washers 24 between said coils and thecoil support 17.

The armature 25 of the relay consists of a rectangular plate which has a pivot bar 26 riveted thereto near each end. Integral with the coil support 17 are two downwardly eX- tending armature supports or hangers 27 which have holes at their lower ends for receiving trunnion pins 28, said hangers being split and provided with Vclamp bolts 29 and lock washers to hold the trunnion pins in place. The pivot bars 2G are provided with bearing holes for receiving said trunniou pins 28. In addition to the usual residual pins 30 in the pole pieces 21 (partly shown in Figs. 1 and 4), a stop bar 31, of brass or similar hard non-magnetic material, is fastened across between the two pole. pieces 21 by screws 32` (see Fig. 3), the faces of the polepieces beingY recessed toreceive the ends of said stop bar. In the armature 25 is threaded a screw 33, with the usual lock nut, which strikes the stop bar 81 as the armature is raised to its attracted position, so that by adjusting said screw 33 the minimum air gapy may be changed. YThe armature 25 carries a number of contact fingers, designated a whole G,

, which are constructed alike, so that a descrip tion of one'will suffice for all. Each contact finger G comprises a strip or bar 34 of brass or similar conducting material which is rigidly fastened at one end to the armature 25 by two insulators 35, shown in detail sect-ion in Fig. 7. This insulator comprises two 1,703,837 i v p Vthreaded studs 36 each having its head provided with a V-shaped circumferential groove 36"L and also with a cross slot 36h. The

' heads of said studs 36 are imbedded in a cylindrical block 37 of molded insulation, with the heads projecting slightly. One stud 36 is 'screwed into the armature 25 and the other 38 associated with each Contact `linger, the

corners of this plate being bent up against the sides of the nuts, as shown in Fig. 1. Between the front insulator and the `bar 34 is a clip 40 to which the usual pigtail41 is fastened. In the particular construction shown, the pigtail 41, which is preferablyA made of braidedv copper, isv threaded through two spaced slots in the clip 40 and soldered. The other end of the pigtail 41 is fastened to a similar clip 40n which is connected toa binding post H.

In my improved relay, there are three rows of binding posts supported by the top ,plate 1` in front of thecoils 19. @ne of these binding posts, designated as a whole II, is the post to which the pigtail 41 is connected, this post being conveniently termed the heel post. The binding posts Fin the next row support the front contacts, and the binding posts B in the front row support the bac-lr contacts.y The post-s I-I, F and B are of different heights in step fashion, as shown in Fig. 1. The construct-ion of these different binding posts is the same in many respects, and for convenience corresponding parts will be given' the same reference characters with additional eX- ponents.

rlhe post I-I comprises an elongated head or standard 4 2, square in cross section, which lits into a square recess formed by a raised ridge 43 on the upper surface of the-top plate 1. A round shank 44, integral with the head 42, extends down through the top plated and is threaded at its lower end to receive a nut 45 clan'iping the binding' post in place and nuts 46 for clamping the pigtail clip 40a. The post has the usual nuts 47 at the upper end for attaching wires; and extending between these nuts and the top plate 1 is a sleeve 48 of suitable insulating nlaterial which surrounds the head or standard 42 and protects it against laccidental Contact with wires attached to the other posts, tools, or metallic articles dropped between the posts. T e raised ridges48 onv the top plate 1 prevent small quantities of water, sometimesgathering on the top plates of relays, from gettingv access to the `ioint between the bin-ding post and said top plate.

The bar 34 of each contact linger Gr has riveted thereto near its front end a it'ront contact spring 50 and a hack Contact spring 51. The front end portion of. the bar is reduced in width (see Fig. 2) and is lient down as bestA lil() shown in F in; l, to enga-ge the back Contact sp ring l at its outer end and limit its upward movement. The spring is split into three parts at its outer end (see Fig. ll) and to each part is fastened a tip 52, of coin silver, or other non-corrosive conductive material. The spring 5l. has a similar tip fastened thereto.

The front contact member, carried by the bindinpost F, comprises a stem which threaded into an axial bore in the bindingr .post F, so that this member may be usted up and down. A jam nut and washer 5G on this stem engages the bottom of a recess in the under face of the top plate l, and not only clamps the binding' post F in place, but also locks said stem .in its adjusted position. The lower end of the stem 55 is provided with a jaw or socket, in which the contact element 57 is fastened by a screw 58. This front contact element 57 is in the forni of a rectangular block, With a hole for receiving the screw 58.

In relays for railway signaling', the contacts should be non-fusi K have a lov-f contact resistance, with a relatively small. contact pr sure', and be capable of n'iainta' ling such low resistance in service after a l: number of operations. To prevent fusing, one of the contact elements is made of some form of carbon, the other element being any suitable highly conductive non-corrosive n'ietal, such as 99.9% tine silver. The use of a carbon contactelement, however, gives a relatively high contact resistance, and to reduce this resistance I impregnate or saturate the carbon element with a small percentage of copper. Instead of carbon in the form of graphite, which has the objectionable greasy property causing it to form in time a film or coa-ting on the metal clement, .increase lthe contact resistance, and make is fluctuate in service, I employ a hard dense carbon, having a crystalline struc-ture. A carbon which I find satisfactory for this purpose is an oil or gas furnace product, which is ground up into a Vtine flour and then pressed together at high tcmpcrature with asuitable binder to vgive a hon'iofijeneous and uniform structure. rIlle constituent parts of this carbon are treated and selected so that the carbon is sulciently porous to receive a small percentage of pure eoiliper. The percentage of copper may be va ried, to suit particular conditions. As larger percentages of copper as used, lower contact resistance is obtained, but the tendency to fuse increased. I find that troni about live to li teen per centof copper by volume provides a non-fusing' element having the desired low contact resistance; and I find ten per cent of copper, or as nearly ten per cent as can be (,btained in commercial manufacture, ogives satisfactory results under the average conditions found in practice. The impregnation of the carbon with copper is preferably made by a combined vacuum and pressure process, so that the copper is as uniformly distributed as possible. This Contact element is dense and hard, in fact, so hard that it cannot be Worked by ordinary tools but mustbe finished with ca-rborundum Wheels or other hard grinding compound. I find that such a carbon contact element gives in practice a low contact resistance with coin silver of approximately .15 to .25 ohms, With. a Contact pressure of from approximately 11/2 to 2 ounces per contact. Moreover, this low contact resistance stays constant in regular service, and will be as low, or perhaps lower, after many operations.

The Contact spring 50, carrying the metal Contact element, is normally set at 'an angle with respect to the surface of the carbon element 57 (see l), so that when the armature of the relay is attracted, this springr is flexed slightly, and the silver tips 52;are slight-ly wiped or rubbed over the surface of said carbon element. This slide cleans the surface of the contact elements, thereby maintaining' them in condition to make an intimate and low resistance Contact, and also causes the circuit to be broken at a different point than Where the current is carried normally 'While the relay is energized. The parts are adjusted in manufacture so that the desired Contact pressure and rub are obtained.

The back Contact comprises a bracket or support 60 which is curved or bent in the shape shown in F ig. l. This bracket has a flange at its upper end which fits in a slot or recess in the undersideof the top plate 1, so as to hold the bracket against turning, and this iange is clamped to the binding post B by a `nut 6l provided With a suitable locking clip,

as shown in Fig. 2. The back contact member shown in F igs. 1 and 2 comprises a pin 62 of brass or similar material, which is threaded into a horizontal flange integral with the bracket G0, so that it may be adjusted up and down, and is clamped in its adjusted position by a lock nut 63. The enlarged head of this pin 62 has a thin Waferlike contact element 64, of silver or similar material., soldered thereto.

Instead of metal to metal, or metal to carbon contacts, carbon to carbon contacts may be desirable under certain circumstances; and Where this is required. I attach a carbon or graphite button 67 to the contact springs 5() or 5l in the manner best shown in Fig. 8.

The neutral type relay above described may be readily converted into a polar neutral type by adding! a polar armature and associated parts shown `in Fi 2% and 4. The polar arma-ture itself comprises two U- shaped permanent magnets 7() fastened t0- gether back to back by bolt 71 and two dowel pins 72 to a. cross member 73 of carrier bar C. In vthis cross member 73 are fixed upper and lower pivot pins T5 and 7G. The upper pin T5 sets in a bearing hole in a boss or lug integral with the coil support 17, and the lower pin 76 lits in a bearing bushing set 5 into the stop bar 31, so that the carrier bar C and the magnets 70 are supported for move ment on a vertical axis in the plane of the pole pieces 2l and above the neutral armature The corresponding ends of the permanent magnet 79 are of opposite polarity and the construction'provides for nxag4 ietic attraction and repulsion by beth pole pieces 21. 'lhe carrier bar C extends crosswise of the relay in front of the neutral armature 25 (see Fig. l) and has two i.eai-.v'ardly projecting side arms Z4- to which polar contact fingers Z7 are fastened by two insulators 35 constructed the saine the insulators reviously'described. The wei glit of the carrier bar C is balanced by counterweiglit T8 attached to the rear end of the cross member structed substantially the saine as the front contact post F, except that it is shorter. the

polar contact member comprises a stein T9 threaded into an aXial bore in the landing post P and provided with a leek nut 80. This stein '.79 has a head 8l integral trnm with, which is preferably squared Vto fachi-y tate its turning; and a square carbon or graphite Contact element yS2 is clamped tov the stem 79 below the head 81 by locking nuts 83.

l/Jhen assembled a neutral type,'iny relay affords a contact capacity of sii: contact lingers (see Fig. 2), each of vwhich may haver a front and a back contact; but when assembled as a neutral-Dolar type, a shorter rneutral armature is used to afford space for the polar contacts, and two outside neutral lingers are omitted, as shown in Fig. 3, the same size of case and the saine parts in other respects being used in both the neutral and the neutral-polar relays. 1n the polaraieutral relay the heel contact post l-l of each of the two outside neutral lingers (which are omitted); is used for' the binding postll of Aone of ilse polar conte' l prefer' to 'use 5 saine top plate for both the neutral neutral-polar relays, and sincethc locat' of the bindiuy posts in these two t. ferent there are sonic blau pace;r lilled by screw bolts 8&3, :is shown 3 and l.

Relays in practice are (/ften installed in places where they are subjected to considerable jar and vibration, which is sometimes Y violent enough to cause improper opening of the contacts. To obviate this diiiicult, I arranlred to float the relay on shock absorbing or cushioning springs so as to take up the vibration.. When the relay is used as a shelf type,thrce helical springs 87 are attached to the underside of the base 2 by screws 88 threaded into the bosses for the long screws 5 and 6-60'. These springs 87 are made stillV enough tio-support the relay freely, but are inade sufficiently resilient to take up the ybracket lO.r

1n order that the cont-act lingers and armature may not shake around and vibrate in shipment, a cordV or other insulated flexible element 92 is looped over two of the middlek lingers, as shown in Fig". l and 2, and the ends are carried down through a hole 93 in the base 2 and clamped by a screw and washer llhen the cord 92 is drawn tight, the contact fingers are held down against their back contacts. When the relay is installed and ready for service, the screw 94C is looscned, and the cord 92 released,so that' the Contact lingers may move freely up and down.

T he cord 92 may be left in place, or removed, as desired. If the cord 1s left 1n place, 1t 1s f only necessary to tighten'it again when it is `may be easily replaced, the carbon vblock 57 being readily removable, and likewise thev screw 62. The use of a hard carbon, impregnated with copper, for the carbon contacts makes the contact resistance between carbon andrmetal lower, and more uniform during the life of the relay, while at the same time not sacrificing any of the advantages or nonfusing characeristics of a metal to carbon contact. I find, however, that the percentage of copper should not ordinarily exceed ten per cent in order to avoid any likelihood of the contacts fusingunder severe conditions. llfhen the armature is attracted, the contact spring 50 is'bentland itstips 52 scraped or rubbed over the surfaceof the front contact element. This keeps the surface of this contact element clean and in connection with the copper impregnated carbon contact pro- 'vides a low contact resistance which remains substantially uniform in service.

Thejvarious binding posts have been arranged to facilitate connection of the various wires thereto, whether the relay is used as a shelf or as a wall type. The arrangement of the three rows of binding posts in staggered or step fashion gives added accessibility to these binding posts, enables tools to be. more easily applied, and facilitates the connections and identification of the various Wires.

The various parts are specially arranged and constructed so that the various types and contact groupings for relays required in practice may be obtained with a small number of parts. For example, the saine top plate, coils, and a large number of other parts are common to the neutral or neutral polar relays, either wall or shelf type; and by the appropriate selection and arrangement of binding posts and contacts, any desired contact grouping, within the capacity of the device, may be obtained. In short, the device is constructed as far as practicable so as to be universal in its application to the different conditions found in practice.

In explaining the nature of my invention I have shown and described certain specific forms, without attempting to show or describe the various alternative constructions; and I desire to have it understood that this drawing and description is merely illustrative of my invention and does not exhaust the various embodiments which my invention may take.

Vl/iat I desire to secure by Letters Patent of the United States, is t 1. A tractive type relay for railway signalling comprising a top plate of insulating material having a large hole therein, a plate of non-magnetic material having holes therein smaller than said large hole and disposed over said large hole, cores supported by and passing through the holes in said plate and having enlarged pole pieces pro]ectin r below said plate, an armature supported below said pole pieces, a base, and glass walls confined between the top plate and base to form a casing, whereby t-he relay mechanism including said plate, cores and armature can be removed as a unit.

2. A relay, comprising, a topplate, coils carried by the top plate, an inverted U- shaped bracket fixed to one edge of the top plate, suspending slots in the bracket, a projecting shelf at the top center of the bracket, a terminal block fiXed to the shelf, and binding posts carried by the terminal block substantially on a level with the top s of the coils.

3. A relay for railway signaling, comprising, .a top plate supportingcoils, an armature, and movable and stationary contacts, an inverted U-shaped bracket attached to the top plate along one edge thereof and affording a grip for supporting the relay against a wall, and a leaf spring fixed to the bracket and wall for supporting the relay and having a yieldable movable part extending between said relay and the wall.

4. A relay for railwayr signaling, comprising, atop plate having coils supported thereon, cores in said coils projecting through said top plate, an armature, and movable and stationary contacts carried by the plate, an inverted U-shaped bracket fastened to the top plate along one edge thereof, a terminal block attached centrally of the upper end of said bracket, and binding posts for the line and coil leads carried by the block substantially on a level with the top of the coils.

A relay of the tractive type, comprising, a pair of cores having enlarged square pole pieces, a stop bar of non-magnetic material bridging across said pole pieces and fastened to both of them, a tilting armature, insulated Contact lingers carried by said armature, insulated stationary contacts cooperating with said fingers, and an adjustable stop pin in said armature arranged to strike the nonmagnetic stop bar, and thereby limit the movement of said armature and Contact fingers.

(i. A relay of the tractive type comprising a` top plate, a coil support of non-magnetic material attached to said plate, a pair of cores with enlarged square pole pieces fastened to the coil support, a stop bar of non-magnetic matei'ial extending from one of said pole pieces to the other and fastened to both of them, spaced armature supports projecting down from said coil support, an armature pivotally supported along' one edge on said supports, contact fingers carried by said armature and cooperating with stationary contacts, and a non-magnetic pin with a locking nut threaded into the armature and arranged to engage said stop bar when the armature is attracted and thereby limit the movement of said contact fingers.

7. In a relay of the type described, an armature, a contact finger, and a. pair of insulators connecting said finger and armature, each insulator comprising two studs each having a head imbedded in a block of molded insulation, said heads being shaped to present surfaces preventing endwise and turning movement thereof in the insulation, said studs including threaded stems projecting therefrom having shoulders, so that if these stems are threaded into said armature and finger such armature and finger will lock against such shoulder and not against the insulation.

8. In a relay of the type described, the combination with a top plate of insulating material having a large oblong opening therein, a plate of non-magnetic metal disposed over said opening fastened to said top plate having two hangers depending therefrom,

cores of magnetic material passing through said metallic plate terminating in enlarged pole pieces, coils on said cores, an armature pivotally supported by said hangers so as to bridge from one to the other of said pole ico pieces, and contact mechanism operated by said armature, said opening beingy of a size to permit the mechanism supported by said metallic plate to be removed therewith through said opening.

9. In a relay, the combination with a toj plate of insulating material, a pivotally supported Contact linger and means for operating the same mounted under said top plate, a bracket rectangular in cross-section generally vertically disposed having laterally projecting flanges at its ends disposed in parallel horizontal planes, a bolt for securing said bracket to the underside of said top plate, said bracket being shaped to have the lower end disposed on one side of the axis of said bolt and so that a plane passing through said lower end and said bolt is parallel to the flat tace of said bracket, a back contact member having a stem threaded into the lower end of said bracket adapted to be engaged by said linger, and a am nut on said stem for locking said contact member in its adjusted position.

` 10. In a relay, the combination with a top plate of insulating material, abracket secured at its upper end to the underside of said top plate, said bracket having a horiaontal `projecting flange at its lower end, a back contact member having a stem threaded into said flange with a nut for locking it, said contact member having an enlarged head for engaging the cooperating contact spring or linger.

11. In a relay of the type described, an armature, a contact bar attached to said armature by insulators, an insulated binding post, perforated clips sleeved on and clamped and electrically connected to said contact bar and binding post respectively, said clips having projecting tongues with spaced' aligned slots therein, and a pigtail connection having its ends looped and soldered in the slots in said tongues.

12. A polar armature construction for relays comprising a carrier bar having a cross member, lateral 'extending extensions on the ends of said bar, contact supports fastened to but insulated from said extensions, and two U-shaped permanent magnets fastened back to back to said cross member by a middle bolt and two dowel pins.

13. A polar armature construction for relays comprising a carrier bar having a middle cross member and two laterally extending end portions, U-shapedv permanent magnets fastened back to back to said cross member, by a bolt and two dowel pins, a set of insulated contact iingers carried by each of the end portions of said carrier bar, said sets extending'A away each from the other, and means for supporting said carrier bar' for oscillation in the plane of said magnets.

le. A relay of the tvpe described comprisn ing a non-magnetic coil support, a pair of magnet structure supported by said top platel including coils abovev said plate enlarged pole pieces below said plate and an armature associated with said pole pieces, and contact mechanism operated by said armature, whereby the electro-magnet structure may be removed as a4 unit wit-hout disturbing said binding posts.

16. In a relay having an armature and a plurality of movable contact ngers carried thereby, stationary front and back contacts cooperating with said fingers, said lingersv being enclosed in a compartment, and flexibly insulated means connected to said fingers and operable from outside of the compartment for holding' the fingers stationary during shipment.

I 1". A top plate for relays of moulded porcelain having a plurality of round holes surrounded by a ridge projecting above the surface of said plate and arranged in the form of a square, said top plate having a large hole therein throughwhich the cores, pole pieces and armature supports of the relay pass, the upper surface of said plate around the large hole being ground to make a tight joint with the coil support, the top plate being unglazed to permit such grinding and being thereafter dipped in insulating varnish.

18. A relay for railway signaling comprising, atop plate of insulating material having coils supported thereon, armature and stationary contacts of the relay, a base and glass side walls forming with the top plate an enclosed compartment for the contacts, a bracket of inverted U-shape attached to the top plate along one edge, and a plurality of long screws connecting the top plate and base, one of said screws .passing through said bracket. Y i

19. A'relay for railway signaling purposes comprising, a porcelain top plate having coils supported thereon, armature and stationary contacts of the relay, a metallic bracket of inverted U-shape fastened to said top plate along one edge with the outer face of said bracket substantially iiush with the corresponding outer edge of said top plate; and a terminal block secured to said bracket, said bracket having spaced holes therein adapted to receive fastening members and support the relay on a wall.

20. In a relay of the type descr'ibed, a porcelain top plate having a large rectangular hole therein, a. non-magnetic coil support secured to said top plate over said hole, a pair of cores with enlarged pole pieces extending through said top plate, said pole pieces beingI fastened to s 'd wall support, coils on said cores, a tilting armature pivotally supported on a horizontal axis troni said coil support below the pole pieces, a bracket fastened to said top plate along one e lee and having an opening therein so as to ali` f'. a grip for carrying the relay, and insulated liinding posts secured to the upper edge ori said bracket substantially onv a level with the upper ends o'f said coils.

2l.. In a relay ot the type described, the porcelain top plate havin a large rectangular hole therein, non-magnetic coil support secured to said top plate over said hole, a pair of cores with enlarged pole pieces extending through said top plate, said pole pieces being fastened to said wall support, en said cores, a tilting armature pivotal suin'orted on a horizontal axis from said c f eport middle cross ineinber and twf: p" portions, U-shaped permanent in V tened back to back to said cross inei sulated contact lingers carried by said end portions of the carrier bar, a stop bar ol, inagnetic material extending between said pole pieces and fastened thereto and aligned trunnion pins in the middle cross ineinber of said carrier bar and entering bearing holes in said coil support and said stop bar.

22. A relay for relay for railway signaling purposes comprising, a top plate, a pair ot cores having' enlarged pole pieces supported by said plate, coils on said cores above said plate, a tiltable arn'iature associated fith said pole pieces provided with contact fingers haV- ing oppositely disposed contact springs, adjustable front and back stationary contacts adapted to be engaged by said contact springs, and contacting non-magnetic ineans on the pole pieces and the armature torining an adjustable stop for limiting the minimum air gap between said armature and pole pieces.

23. In a relay for railway signaling purposes, the combination ot' a substantial rectangular casing having a top wall provided With a large opening, a relay supportinounted in said opening, a pair of pole pieces extending through said relay support, a soft iron armature pivoted to said support and having a plurality nl neutral. Contact lingers extending i'roin one side of said arinature to the opposite side or the casing, and a polarized armature pivotally connected to said pole pieces and having a plurality of contact lingers on each of its opposite ends extending at substantially right angles to the neutral contact lingers. y

24. A relay tor railway signaling purposes comprising, a U-shaped core terminating in large rectangular pole pieces, a non-magnetic bar connecting said pole pieces, a soft iron armature pivotally mounted adjacent said pole pieces and having an adjustable residual pin adapted to engage said bar, and a polarized armature magneticallyv associated with said pole pieces and pivotally mounted on said non-magnetic bar.

25. In a relay, a substantially rectangular cz sing, a top plate on the casing, pole pieces in the casing, a neutral armature in the casing below the pole pieces and supported by the top plate adjacent one side of the casing, neutral contact fingers carried by the armature and extending to the opposite side of the casing, a polar armature carried by the top plate adjacent the pole pieces, and lingers carried by the polar armature extending laterally to the two remaining` sides ol' the casing whereby to segregate the neutral lingers from the polar ngers. Y

SLISBURY M. DAY.

Images