US1020826A - Rail-bond. - Google Patents

Description

F. E. JOHNSON.

RAIL BOND.

APPLICATION 2mm JULY 24, 1911.

Patented Mar. 19,1912.

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UNITED STATES PATENT OFFICE.

FRANK E. JOHNSON, OF CHICAGO, ILLINOIS.

' RAIL-BOND.

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Application tiled Iiily useful. Improvement in Rail-.Bonds,of which ,the following is a specification.

This invention relates 'to improvements in rail bonds and has for its obJect to provide a new improved deviceof this description. The invention is illustrated in the accompanying drawings, wherein- Figure 1., is a view of one form of bond embodyinginvention; Fig. 2 is an enlarged sectional view taken on line 22 of Fig. 1; Fig. 3-is a sectional view through the head of; tlie.rail before the connection between ,ilierails is in place; Fig. 4 is a sectional view through the conductor for connecting lthewrails together. a

Like numerals refer to like parts through- ;out- 'the several figures.-

This invention has, among other objects, to;.electric all connect the heads of rails .part-of an electric circuit. ,L'I n carrying out the invention, I form receiving openings in the heads of the. rails. [lieserecciving open ngs 1 are formed by cutting away aport-ion of the material and lfit vin a portion of the material intact so as to farm the posts 2 integral with the rails.

,By this means there is provided two opposed engaging faces 3 and 4 on the rail.

--ri1ep se2' is preferably indented or other- 'w s'd'formed so as to receive a portion of thcmaterial of the conductor. As herein shown, this post is provided near its end with the groove 5. The connector 6 is provided with the terminals or contact pieces 7, said contact pieces ro'vided with openings 8 for the posts ii. hese contactpicces are of such size asto snugly fit into the receiving openings 1 in the heads of the rails,'and the openings 8 are of such size as to receive the )osts-t. The contact pieces 7 are 'made so tint when forced into the reeeiving openings 1 the metal will be spread so as to make an intimate contact with both of the faces 8 and 4. This result may be secured in an desired manner, as for instance by ma ing the contact ieces somewhat longer than the depths o the receiving spaces 1 so that when the contact pieces are hammered or forced into position, the ends theteof will enga the bottoms of the openings 1 sofas to resist the force orblpw Specification of Letters Patent.

Patented Mar. 19, 1912.

Serial No. 840,095.

and thus cause the material to spread so as to make an intimate contact, some of the. material entering the groove 5 as shown in Fig. 2. It will be noted that the posts 2 being in the middle of the contact pieces will insure the proper spreading of. the material under compression so as' to secure the desired intimate contact. This construction adds greatly to the conductivity because of the fact that there are two com ucting' areas 3 and 4 directly connected and integral with the railitself, the material of the connector being in intimate contact with both oi these conducting areas. This forms what ma be called a double contact terminal. This construction also increases the mechanical strength of the connection. If desired, a suitable material such as tin or any kind of solder may he used, this solder being placed upon the outer and inner faces of the terminal or upon the faces 4 and When the bond terminal'is driven in place, heat may 'he appliedsufiicient to melt the solder so as to cause a more perfect union.

'ith the eonstructlon shown, it will be noted that one end of the opening 8 is closed so that when theparts are in position, the contact terminals are sealed so 'as to entirely cover and protect the posts 1. This prevents the contact. with the post from becoming deteriorated by corrosion or the like. it will further be noted that there is here provided an electrical contact where the two parts each have two separate concentric contact faces, the contact faces of one piece making contact with the contact faces of the other piece.

It will be. noted that by means of this construotion and particularly because of the post .2 integral with the rail, there are certain advantages not found in other rail I bonds, among which may be enumerated.

the advantages due to the increase in the gripping surfaces which gives two separate gri 'iping surfaces in contact with the rail, one inside of the head and the other outside of the head, and both cooperatin to rip and hold the bond against remova A urther advantage results from the fact that upon, the inside. -,flhia non-corrosive contact surface is obtained even when there is poor workmanship and the bondin claim: g j j 1.,An electrical connection comprising carelessness in placposition,

two pieces to be connected, each provide i ii e' piece with w -ductor connectingsaid ieces and provided .said ,posts,

with a receiving opening, a post surrounded receivm ceiving openingsfa conductor connectin so i. v

, 3.-An' elect ical connection eomprisin nals havin said pieces and provided with contact termiopenings {or said posts, said openings 0 osedat their outer ends, said a terminals fitting into said receiving openings in said pieces so as to surround said posts.

two pieces to be connected, each} provide with I ;-,-'with each of s i "said receivi g openings, J,n ting said ta,.t termina j' page, said te'r iinals fitting into said receivt p f: si e of said p a receiv o ening, a post inte al pi eces and surrtunded hy a conductor conaces and provided with ,con-

having openin for said openings 0 as "to surround said posts, portionso said contact terminals outsts being sealed so" as to entirely eover'an 1 protect said posts.

a 5; An 'lcct icul connection comprising two pieces to lie connected each provided with' a rec .i in}; opening, a post surrounded by each r icivmg opening and iptegral with t e piece with w uch it is associated, a condhctor connecting said ieces and provided with contact terminals iuviug openings for said posts, said terminals fitting into said receiving opcnin indentations in said {mats and means or forcing the material of v said terminals into said indentations.

one'of the'conta'ct surfaces, namely the inner t one,can not corrode for to have corrosion, theair and moisture must. assdown-the =r;outsideof thehead across "t ebottom and opening and integral with provide 5. An electrical contact comprising a piece provided with, a receiving opening, a post integral with said piece and surround,- ed by said receiving opening a contact terminal rovided with an opening for said post, said contact terminal confined within said receiving opening so, as to surroundthe post and ma ting contact with the post and with the wall of the opening surrounding the post.

6. An electrical contact comprising two pieces to be electrically connected, both of said ieces havin separated concentric contact aces integra with the'pieces, the contact faces of one piece making contact with the contact faces of the other piece.

7. An electrical contact comprising a piece provided with a receiving opening, a post integral with said piece and surrounded by said receiving opening, a contact terminal provided with an opening forsaid post, said contact terminal confined within said opening so as to surround the post and make electrical contact with the post and with the wall of the opening surrounding the post, the outer end of said post bein completely covered so as to be sealed an protected.

8. An electrical connection comprising .a rail two separated cooperating gripping surfaces, integral with-said rail,

the other, a contact terminal havin two separated cooperating gripping sur aces integral therewith, onc'witiin the other, the gripping surfaces of the terminal engaging the gripping surfaces of the rail.

9. A rail bond device comprising a rail provided with a receiving opening, arpost Integral with said rail and surrounds by said receiving opening a groove in said post, a contact terminal provided with an opening for said post' and having a part which surrounds the mat and fills the opening in the rail and time roovc in the post, the coutact'terminal ma in electrical contact. with said post and witl the portion of the rail surrounding said post.

Signed at Chicago, Illinois, this 18th day of July 1911.

FRANK l'}. JOHNSON. \Vitncsses:

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