US1643306A - Rail bond - Google Patents

Description

Sept. 27,1 c, LAVARACK ET AL RAIL BOND Filed Jan. 15, 1923 ATTORN y I ly zszvroki 4 Patented Sept. 2?, 1927.

Uhli'lED STATES FATENT oFF cE.

FREDERICK G. LAVARACK, OF MON'ICLAIR, NEW JERSEY, AND WILLIAM M. PAGE, OF

PITTSBURGH, PENNSYLVANIA.

RAIL BOND.

Application filed January 15, 1923. Serial No. 612,619.v

vice connected across the rails at one end of the section and a battery or other source of a' difference of potential'connected across the rails at the other end. The abutting ends of the usual thirty foot rail length within the section areconnected as usual with fish plates which usually furnish a metallic path from one rail length to the adjoining rail length even if the ends of the rails are not in actual contactfi It has been found, however, that the metallic path for the flow of electricity, from one rail to an adjoining rail is not of sufficiently low resistance when entire dependence for a metallic pathbetween rails is placed upon the.

usual mechanical connection between rails, consequently all installation of track circnits also include a special connector'or rail bond between the adjacent rail ends within the section. for supplying a proper low re-' sistance path forthe flow of electricity from rail and to rail end. 4

lleretofore the connectors or rail bonds have been of many types, some electrically or gas welded to the respective rail ends, some connected by channel pins and some by what are known as plugs. v

Applicants invention relatesto the plug type of rail connector or bond. The principal object of applicants invention is the production of a plug bond in which the electrical connection between plugs will be obtained by the same means by which the mechanical connection is obtained.

A further object of applicants invention is the production of a connection between the plugs and connecting wire in a plug type of bond which will effectively eliminate corrosion at this point.

A further object of applicants invention. is the production of a joint between the.

plugs and connecting wires in a plug type of bond which will be of a nature especially adapted to that type of plug bond in which aplurahty of wires extend between the plugs.

. chanical strength.

A further object of applicants invention is the production of a bond of the type speciiied in which the electrical union between the plugs and the wires proper will be so exceptionally intimate and so formed as to be of relatively high conductivity.

Other objects and advantages will appear as the description of the preferred-physical embodiment and modification thereof, selected to illustrate the invention, progresses and the novel features of the invention will be particularly pointed out in the appended claims.

In describing the invention in detail and the particular preferred physical embodiment and desirable modifications thereof selected toillustrate the invention reference will be had'to the accompanyingdrawing illustrating a preferred physical embodimentof the invention and desirable modifications thereof, and in which: i I

' Figure '1 illustrates the abutting ends of two rails connected by applicants improved bond; Fig.2, illustrates themanner of be': ginning the construction of the joint be tween the plug proper and the wires proper; Fig. 3, illustrates further progress in con structingthe joint shown by Fig. 2; Fig. 4,; shows the completed joint as shown started in Fig. 2; Fig. 5, isan enlarged cross-see tional view ofFig. 4; Fig. 6, illustrates one completed bond; Fig. 7, illustratesithe coinpleted form of the joint between the plug and wires'when three wires are used between plugs; Fig. 8, shows the plug and adjacent wire portion of a different type of three wire bond; Fig. 9, is a cross sectional View on the plane indicated by the. line IX-'IX of Fig. 8. V

In Fig. 1 are shown mile 1 and 2 held together mechanically by the usualfish plate 3 and bolts.4.-

Applicants" improved bond in Fig. 1, is designated as a whole by B and consists generally of one or a plurality of connecting wires 5 attached at each end to a. plug 6 side of the plug 6.

which is driven into a cavity formed in the web 7 of the rails. g V 7 By reference to Fig.2 it will be seen that plug 6 is formed with a bore 8, through which extend the wires 5.

In order to form our type of oint betw wires 5 and plug 6 we also thread thro bore 8 the wrapping wire 9 sothat aconsid erable portion thereof extends beyond each I The wire 9 is wrapped closely about the wires 5 and close to the sides of plug 6, as shown in 3, and when the wrapping is complete the joint appears as shown in Fig. l. 1

After the joint is completely wrapped as shown by. 4;, it is suitably treated in cordance with well known art and dipped in molten metal or alloy preferably tin, When the joint cools all parts are firmly ce inented together by tin 10 as appears in Fig:

o. This tin will firmly fasten the wires 5 togather and to the plugtl and unite wrapping wire 9 with the rest of the structure and in particular wnpping wire 9 will be firmly united to wires 5 and plug 6 at the sides oil plug 6, that is at the POlXlt 11. i

Fig. Gillustratesone end and an interme-L diate portion of the completed bond and shows the 'intern'iediate tie wires 12 which are wrapped about the wires 5 and serve to keep them together. g

Fig; 7 illustrates a completed joint cinploying three wires 5. i

Fig. 8 illustrates a Completed joint employing three wires 5 and these wires are not insertedin plug 6 in what may be called a single bore, but-as sl own by Fig. 9, three bores 13, i l and 15 are termed, which are ,merged one into the other, by a central bore 16. Each of the larger bores receives one strand of wire 5 while the'c entral bore re ceiveswrapping wire 9.:

The wrapping ire 9 shown in the several joints firmly mechanicallyties wires 5 to the plug 8 and so supports w1res5 that the ill evitable vibration of the wires does not cause them to break just nside oi the head oi the plug 6. This supporting action is augmented b" the tinning which being relatively soft really atlords' asort of resilient connection between plug 6 and wires 5 so that the inevitable vibration of wires 5 are damped and absorbed by the interposed tin, sothat dhe to the wrapping wire 9 and the tin 10 no delinite plane of vibration exists in wires 5 adjacent the head of plug 6.

The tin also serves the further function of appropriately electrically connecting wires 5 and plug 6 and the further important function of completely excluding moisture from the joint thereby preventing corrosion and withresultant increased resistance and me chanical weakening.

Althoughwe have described a preferred physical embodiment of our invention and desirable modifications thereof, nevertheless we desire to have it understood that the forms selected are merely illustrative and-do not exhaust all of the possible physical sin-- bodiments of the idea of means underlying ourinvention. r i

What we claim as new by Letters Patent of the United States is:

r 1. The method of forming theconnectiou oetween a plug and the wires properin a plug type rail bond which consists in formend desire to'secure ing an orifice in the head oi the plug at :1 7

right angleto the longitudinal axisot the plug, positioning the wires proper, in the.

orifice so that a relatively slight portion thereof protrudes, then passing a relatively short length or wrapping wire through the orifice so that either end protrudes beyond the sides of the plug, then. w raliping the protruding ends or the wrapping wire tightly about the first mentioned wires and against the sides of the. plug then cleaning and i 13% ing all parts adjacent to plug and then dippiiig the joints so made into a molten metal of relatively low inel'tingp'oint. V a

y 2;. in a rail bo'iitl i.i1 combination two plugs each iormed with an orifice therein ah.

till

right angles to the longitudinal tlI'lQS'thG-JT)" of; a plurality of wires extending from one plug to the other plug and having theirends l extending into and through the orifices in the plugs; wrapping wires, one positioned in each orifice and having beyond the sides of the V tightly around the wires and tightly against the sides oi the phigs; a relatively low'ine' ingpoint inetal filling all of the interstic s between the several wires and the plugs and means intermediate the plugs for keeping the first mentioned wires closely together.

FREDERICK Grimmer. WILLIAM MJPAGE. 1

its ends extending v plug and wrapped

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