US1926782A - Brake connection - Google Patents

Description

Sept. l2, 1933. w. J. M'CDCJNALD BRAKE CONNECTION Filed NOV. 28, 1930 TMW/MZ Patented Sept. Y12, 1933.y

UNITEDSTATES Ware vPATE-Nr orFie-E.

1,926,782 BRAKE CONNECTION William J; McDonald, Chicago, Ill., 'assignor, by

mesne assignments, to Pullman Car t Manuv,facturing Corporation, a corporation of Dela- Application November 28, 1930 Serial No. 498,572

4 claims. (o1. 711-17) bar manipulated to provide all of the jaws andthe body of the connection.

This invention contemplates the use of a pair of bars of constant cross section welded at their respective edges to provide a unitary hollow member of predetermined lengthand strength, the ends of the bars being severally forged to provide connection jaws.

rEhe principal object of the invention is to provide a rugged connecting bar so-designed as to permit the use of commercial rolled bars of angular or curved cross-section, if desired.

The foregoing and other objects are attained by the mechanism illustrated in the accompanying drawing, in which Figure 1 is a plan View or" a preferred embodiment of the invention, with a portion of the connecting bar at the jaws broken away to show the disposition of the pin openings and the jaw material;

Figure 2 is aside elevational view of the same with the jaw of one oi the bar-sof the connection broken away to expose the inner face of the companion jaw on the otherbar;

Figure 3 is a section thru the jaws taken on line 3--3, of Figure 2, and slightly enlarged to show the distribution of the jaw metal;

Figure 4 is a similar section thru the body of the assembled connecting bar taken on line 1 -fl,

angle plates 11 united by welds l2 spaced apart as shown or by continuous weld, as desired. The contiguous bar edges 13 combine to formgr'ooves 14 designed to accommodate the welds l2 as best shown in Figures 1, 3, and 4.] To form the jaws l5, the corners or crestsv 16 of the angles and adjacent langesl'? are deformed by `forging to provide a relatively iiat web portion 1S having a circumscribing peripheral flange portion 19 and extruded flange portions 20 dening pin openings 21 to provide extended bearing areas for the connection pins.V .Where commercial rolled angle barsare usedas shown, the corners 16 and llet ymetal 22 thereof extend into the jaw area andsupplement the material entering the jaw to rigid-ify the body portion of the connection yand basal extremities of said jaws.

The jaws 15 are arranged parallel tothe weakest neutral axes X--X of the severed bars and take their respective load thrust outside the plane of said axes, whereby suchthrusts are imposed eccentrically to cause said members to be stressed toward each other. By this arrangement the p 1essures exerted are balanced and the tendency of the bar assembly to buckle under .compression is reducedto a minimum.Y With the contiguous flange edges 13 'in extended bearing engagement with each otheras indicated in Figures'l, 3, and 4, the welds V12 function only to prevent separation of the bars between the jaws and to further rigidity the assembly. n the preferred embodiment illustrated in the first four iigures of the drawing, the web portions 18 of the jawsl are disposed outwardly of the extruded metal portions 2G along the jaw peripheries and about the pin openings 2l., and in substantial alinement with portions of the members farthest removed from the Vneutral axis of the assembly.

The jaws 15 may take the form depicted in Y Figure 6 in cases where additionalbearing area for the braise lever is deemed necessary. As shown, the weh portions 18 of the jaws are disposed inwardly of the extruded reinforcing por-4 tions i9 and 20, and in substantial alinement with the weakest neutral axis X-X of the respective members.

It 'may be desirable at times to substitute curved plates for the angle plate sections of the preferred embodiment. As shown in Figure 5, pressed or rolled bars 23'of semicircular or crescent shape are placed together edge to edge to form a tubular column and united by welding as in the case of the angular bars. The ends of the respective bars are manipulated to form jaws 24 with extruded pin bearing flanges 25 and peripheral stii'ening flanges 26 projecting from either side of the web portions 27.

Although the jaw structures have been described as having their respective web portions' inwardly or outwardly of their extruded flange portions Ait is obvious that the jaw sections may assume a general E-beam configuration with the several webs positioned midway of the extruded flanges dening the pin openings and jaw peripheries, and also function to transmit the load fno thrusts outside the plane of the weakest neutral axes of the members to stress the bars towards each other as in the case of the other embodiments.

A connecting bar of the type described may be economically produced from prepared sections or members fabricated to suit and united by electrically welding them, preferably in a jig to insure accurate alinement of the pin openings in companion jaws to avoid drilling, and both seams simultaneously welded in a welding machine, using two electrodes, to prevent warping.

What I claim isz- Y l. A hollow brake rod formed from a pair of commercial rolled angle bars, said bars having edge to edge engagement and rigidly connected together to form a hollow rod substantially rectangular in cross section, the ends of said angle bars being formed into jaws parallel withthe plane of saidmeeting edges'and each having a Vreinforcing flange extendingl about its edge, the

angle portion of each angle bar merging into the jaws at opposite ends of the corresponding bar, bosses on said jaws at each end of said brake rod and having aligned apertures therethrough.

2. A hollow brake rod formed from a pair of commercial rolled angle bars, the thickness of the metal forming the angular portion of each bar being greater along the bisector of the angle than that of the flange portion, said bars having edge to edge engagement, the engaging edges of said bars dening a groove at each side of .said brake rod, welds in said grooves for connecting said edges together, the ends of` each of said angle bars being formed into jaws at each end of said brake rod, said jaws being parallel Vwith the plane of said welds and outwardly of the neutral axes of said angle bars, each of said atportions being vprovided with inwardly extending apertured bosses and having an inwardly extending ilange extending around its edge out- Wardlyof said bosses, the angle portion of each angle bar at each end thereof merging into said jaws.

3. A hollow brake rod constructed from a pair of commercial rolled angle bars formed with `jaws at their respective ends and having edge to edgeengagement in the plane of the neutral axis of the rod and between the bights of the jaws, the thickness of the metal forming the angular portion of each bar being greater along the bisector of the angle than that of the ange portion, the flanges and corner portions thereof being merged to form said jaws in planes parallel to the weakest neutral axes of said bars, said jaws having relatively flat base portions formed with apertured bosses and marginal ange portions, and weld means uniting said' bars. Y

4. A fabricated hollow brake rod constructed from a pair of commercial rolled angle bars formed with their respective end portions flat-A tened and their intermediate portions compleinenting each other to form a polygonal column having sides inclined with respect to the plane of and merging with, said attened end portions to provide jaws havingv perforated vbosses and marginal flange portions beyond the bight of said jaws, the thickness of the metal of the angular portion of each bar along the bisector of the angle being greater than the thicknessof the flange portion, and weld means uniting said bars betweensaid bight portions of the jaws.

WILLIAM J. MCDONALD.

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