Патент USA US3100085код для вставки
Aug. 6, 1963 R. A, FlEcHTER 3,100,080 RAILWAY RAIL JOINT Filed May 27, 1957 â /// . M/ l eAN. i @V/ m5 INVENTOR w ___ la' dïme’ú. :- ¿www? ATTORNEYS drares ?Parent ire l @$00,080 Patented Aug'. 6, i063 2 state, to assemble, or reassemble, the parts in their desired reiation including normal pressures, tensions and the like, and to cure the resin by the application of heat for a sulit able period of time. 'A ñlm of such a bonding agent is represented in the 3,100,080 RAILWAY RAIL JUNI Rene A. Fiechter, Douglaston, NX., assigner, by mesne assignments, to American Railroad Curvelining Corpo ration, a corporation of New York drawings (the thickness being exaggerated) at 9" and 10, between the fish plates 3, ¿i and the contiguous parts of the rails, at 11 in the clearance between the shank of the Filed May 27, 1957, Ser. No. 661,921 11 Claims. (Cl. 23S-_El) This invention relates to a railway rail joint, referring particularly to such a joint in which the rail ends are inte grally but non-‘homogeneously connected in such a man bolt 5 and the 'holes through which it passes, and at 12 between the .abutting ends of »the rails. In actual practice it is preferred to have the metal parts as close together ner that the rails are securely held against longitudinal as possible, i.e., practically “capillary closeness”----about movement relative to each other. 0.1 mm. lf this result cannot be achieved with respect to the rail-end bond at 12, the space can be filled with which cannot accidentally work itself loose or become 15 one or more resin coated shims of appropriate shape and accidentally loosened under any conditions whatever, apart thickness, including a wedge-shaped one to ensure tight from the application of some violent force. iilling of the gap. ln a track in which the rails are separably joined to The bonding material presently preferred is the ethoxy gether by splice bars in a rigid or “frozen” manner, there line resin known as “Araldite” Type I (the Ciba brand is comparatively little pounding and wear on the rail ends, 20 of a reaction product of epiohlorohydrin and p,p’-isoprowhere pounding and maximum wear usually occurs, and pylidene la‘isphenol). This material is solid at room tem An object of the invention is to provide a rail joint this is more especially tme `the closer together the rail perature, begins to soften at 50°-60° C. (‘l22°~l40° F.) and flows freely 4at 13O1°-1i40° C. (266°-284° F.). For convenience in handling and applying this material it is ends are disposed. As compared with a track »in which the rails are welded together at their ends, it is advantageous especially from the standpoint of permitting quick and easy removal and replacement of individual rails, to separably connect the rails by means of splice bars. Accordingly, the present preferably formulated with a suitable polymer so as to be semi-liquid at the temperature of application. It contains terminal epoxy groups and is soluble in the usual ketone solvents. invention has more particularly in view to provide, on When heated for some «time at temperatures above 120° the one hand, a track wherein the rails are separably con 30 C. (248° F.) curing «begins and the resin adheres ñrmly nected for individual removal and replacement, and to the surface with which it is in contact; no volatile sub wherein the rails are rigidly connected in abutting or stances lare given off and the volume undergoes practically relatively closed end to end relationship against the pos no change. The surface of the work piece must be sibility of endwise movement relative to each other; and, thoroughly cleaned and may (Ibut need not) be roughened. on the other hand, to provide joints embodying novel fea 35 The resin may be applied in rod or powder form to clean tures of construction for separably connecting the rails metal surfaces which have been heated to 130°-150° C. and eifectively holding them rigidly alined and against (266 °-3 02° R); or preferably in semi-liquid form to un relative longitudinal movement. heated surfaces, and when the resin has «stuck to the sur With the foregoing and other purposes in View, the rail faces »as a fairly uniform iil‘m «the parts are brought together joint (or the like) includes the provision of a synthetic 40 and held ñrmly until fthe curing has been completed. The resin bonding agent interposed between two metallic parts resin described above can be cured over a wide range (e.g., the rails and the iish plates, if any) which res‘in of temperatures in inverse relation to the curing time, can be, and is, molecularly engaged with the surfaces to »as shown in the table below. At temperatures of ‘190° be connected so strongly as to obtain the desired results. C, (374° F.) and below, it is practically impossible to A similar bonding agent may also be provided between 45 destroy the bonding agent by exceeding the recommended a metallic part and a part composed of some other mate (minimum) time, but «at temperatures of 200° C. (392° rial (e.g., the tie plates and the ties). F.) and above, the maximum time limits must be care A practical embodiment of the invention is represented fully observed. in the accompanying drawings wherein: FIG. 1 represents a side elevation of a rail joint together 50 with an adjacent tie and tie plate on which the rail is Curing temp. al: joint Minimum time 110° C.-230° F _______________ __ 48 hrs ___________ _. Maximum time secured, FIG. 2 represents a transverse vertical section on the line II-II of FIG. l, on an enlarged scale, and FIGS. 3, 4 and 5 represent, in somewhat diagrammatic 55 cross-section, modiñcations in which no iish plates are 120° C.-248° F... used, the bonding agent being retained in effective posi tion by the use of a two piece (FIG. 3), one piece (FIG. 4) or three piece (FIG. 5) metal sleeve. IReferring to the drawings, a rail joint is shown as com prising the adjacent ends of two steel rails, 2, a pair of iish plates 3, 4 (also sometimes known as side plates, splice plates or joint bars) and bolts 5. The rails are 60 In actual practice the heating of the joint can be intended to he supported in the customary manner upon eifeoted in various ways, as by means of a portable gas wooden ties 6 to which they are secured by means of 65 or electric heater designed to apply heat locally to the spikes 7, with or without the interposition of tie plates 8. area in which the joint is Ebeing formed, whether it be a In order to eifect the bonding of rail ends according to the present invention, it is desirable to clean and roughen the metal surfaces to be bonded (as by sand rail-end joint or a tie plate anchoring connection. rI‘he heat and time selected will 'depend on various factors, but a relatively quick cure is obviously desirable in loca blasting), to apply to one or both of said surfaces a coat- 70 tions where the track being worked on cannot be kept ing of an epoxy resin (ethoxyline class) in a semi-liquid out of service for a long period of time, while a slower 3,100,080 __ 3 4 cure (for, a Ifew hours) at lower temperatures may be one shim interposed between the butt end surfaces and used Whenever possible. bonded thereto. As :an example of the holding power of a bonding agent such las that described above, it has lbeen found that the bonding of «the ends of 132 lb. rails, using 6-h0le 4ñsh plates, « exhibits Ia shear strength of over 400,000 lbs. In addition to the rigid attachment of 'adjacent rail ends 5. A railroad nai-1 joint comprising rail end portions and lish plates substantially rigidly bonded together by to the fish plates and «to each other, it is frequently `very . important to fix fthe tie plates 8 immovably on their re spective ties 6. For this pur-pose »a bonding agent of the same-type can be used, Ias shown at 13, With the proviso thatnhe body of resin here may be substantially thicker and may even constitute a sort of pad uniting the tie plate tothe tie very iirmly but with a measurable ‘amount of resiliency. Such <a resin pad may, for the sake of 15 economy and/or resiliency contain a suitable organic or the interposition throughout at least a major proportion of the ñshing surfaces between said end poutions and plates of a thermo-setting synthetic resin bonding agent. 16i. A joint according to claim 5 which includes bolts so disposed as to hold 4the fish plates in close proximity to the rail end portions, pants of the sunfaces of `the bolts »being bonded to the rail end portions and to the ñsh plates. 7. A railroad' rail joint comprising rail end portions yand a metallic sleeve element having an inner surface of . extended larea complementary to at least a substantial proportion of the lateral surfaces of said rail end portions, inorganic tìller (such las `ground cork). said complementary surfaces of the sleeve element and I of the'rai-l end portions being substantially rigidly bonded While epoxyy type resins «have recently been used for metal bonding in certain other industries, the possibility together by the interpositionthroughout at lleast a major ofV using such 'bonding agents under the extremely heavy 20 proportion of said complementary surfaces of a thermo duty requirements of railroad track joints has not pre setting synthetic resin bonding agent. viously been suggested and the success of this develop 8. A joint according to claim 7 in which the rail end portions have butt end 'surfaces bonded together by the ment vis of very great importance. Ibonding agent as well as being «bonded to said metallic The strength of the adhesive bond is such that, in some instances, the ñsh plates can be entirely dispensed With and replaced by relatively thin metal sleeves encas ing the rail ends (except for the head) and bonded there sleeve element. 9. A joint :according to claim 8 in which the connec «tion between the butt ends of the rails includes at least one shim interposed between the ‘butt end surfaces and -to .as described above. In FIG. 3 the sleeve is shown as comprising-two unequal parts 114 and 15, the part 14 bonded thereto. 10.- A joint according «to claim 1 in which the bonding íitting closely against one side of the rail and the part 30 Iagent consists predominantly of a reaction product of l 15 iittingand covering the other side and the bottom, the parts having matching ñanges 14' and "15’ where they , cpiohlorohydrin and p,p’-isopropylidene bisphenol. ll. A bolted frozen insulated rail joint comprising, in are preferably bond-ed to each other. The one piece sleeve 16- of FIG. 4 can most conveniently combination, a pair of rail ends, having bolt holes, a pair be applied Wherethe adjacent mail ends are so located 35 of joint bars ‘having bolt holes, a settable bonding com~ , pound iilling the space between the rail ends to form an «that the sleeve can be slid «all the way onto one end end post, land a setta‘ble bonding compound i-n the spiace while the otherend is brought into position, the sleeve between the related load bearing faces iof the rails and then being moved out to enclose said latter end. joint bars, 4bio'lts connecting the bars to the rails, said The «threepiece sleeve of FIG. 5 includes side parts 17, 18 having flanges 17', 18' ‘and Ia bottom part 19 which 40 bonding compound joining the rail ends and bars and bypassing the strain Ion the bolts and end post directly is Wide enough to have its vedges match the ilanges, to from one rail to the other. , which it may be bonded. In each instance the Ábonding material is applied to the cleanedrail surfaces, the sleeve part or parts are posi References Cited in the iile of this patent tioned with clean inner surfaces facing the rail, land the L15 entire' sleeve is tirmly pressed against the rail while #the UNITED STATES PATENTS assembly is heated to ensure curing of the .bond-ing mate 78,422 , Buzby ________________ __ June 2, 1868 rial. , It will «beunderstood that the nail end surfaces are _bonded `as. shown at 12 in FIG. 1, and the íinal result is a strongly “frozen” joint which cannot be accidentally 50 loosened. Because of the greater surface area involved, the sleeves need not be »as long -as normal iish plates in order rto give ian equally strong bond. It will be `understood that various changes maybe made in the form, construction, arrangement land materials of fthe joint structure and in -the steps of thewmethod’ without departing from the spirit and scope of «the in vention. What I claim is: 1. A railroad rail joint comprisingrail end portions 60 and at least one `additional metallic element'having a sur ñace complementary to vatleast a substantial proportion ’ of the lateral surfaces of said rail end portions, said end portions and said element :being substantially rigidly bonded «together bythe interposition throughout at least 65 190,863 477,672 lbbotson _____________ _.. May l5, 1877 Moxham ____________ __ lune 28, 1892 ' 823,180 Leech _______________ __ June l2, 19016 1,266,597 1,659,976 Jansen et al ___________ __ May 21, 1918 Aroblbs ______________ __ Feb. 21, 19128 1,757,973 Mead _______________ __ Miay 13, 1930 2,104,157 2,130,106 f Forcella ______________ __ Ian. 4, 1938 Schermerhorn ________ __ Sept. 13, 1938 2,512,996 Bixler _______________ __ lune 27, 1950 ’ 2,542,405 2,575,558 Fink ________________ __ Feb. 20, 1951 Newey ______________ __ NOV. 20, 19511 Larson et al ___________ __ Aug. 25, 1953 2,650,185 2,670,136 Moses ______________ __ Feb. 23, 1954 2,679,468 2,682,515 2,690,879 Pitman ______________ __ May 25, 1954 Naps ________________ __ .lune 29, 1954 Snyder ________________ __ Oct. 5, 1954 2,707,694 Standri'n-g _____________ __ May 3, 1955 FOREIGN PATENTS a major proportion of said complementary surfaces of a thermo-setting-synthetic resin bonding agent. ’2..A joint according tov claim 1 in which the bonding agent is of approximately capillary thickness. 3. A joint according to claim 1 in which the rail end 70 portions have butt end surfaces bonded »together by the bonding’ agent as ‘well as being bonded -to said metallic element.4. A> joint according to yclaim 3 in Iwhich the connec tionëbetween the butt ends of the rails includes at least 133,819 630,663 698,665 726,310 Australia ____________ __ Aug. `l0, Great Britain __________ __ Oct. 18, Great Britain ______ __»____ Oct. 211, Great Britain __________ __ Mar. 16, ' 1949 1949 1953 1955 OTHER REFERENCES “Afraldite” Moss, CJ. British Plastics, pp. 521-527, No vember 1948. (Copy in US. Dept. of Commerce, Patent Oiiìce, Scientiñc Library and in Div. 67). '