Патент USA US2130837код для вставки
sept- 20, 1938. B. H. BRENNER 2,130,837 PILOT STEP Filed July 1'7, 1936 9 _ _ INVENTOR: .5511, amm, 7113122121151’, Patented Sept. '20, 1938 2,130,837 UNITED STATES PATENT OFFlCE 2,130,837 PILOT STEP Benjamin H. Brenner, Altoona, Pa., assignor to The Pennsylvania Railroad Company, Phila delphia, Pa., a corporation of Pennsylvania Application July 17, 1936, Serial No. 91,155 2 Claims. This invention relates to steps for railway ve hicles and especially to steps of the character employed at the front end of a locomotive. . ‘ It has long been recognized that there is ad— 5 vantage in providing well rounded smooth sur— faces at the front end of locomotives and other railway vehicles, and the considerations entering into the design of such surfaces have included the matter of lessening wind resistance with re ' suiting increased speed, the matter of improv ing the vision of the engineman by assisting the lifting of the smoke stream issuing from the stack, and the matter of de?ecting objects struck by the vehicle away from the track on which it is 1 traveling. In applying such improvements in front end design to a conventional steam loco motive, and especially where a relatively thin exterior casing is employed at the front of the vehicle, di?iculties arise with respect to satisfy 20 ing certain safety requirements. One such diffi culty is that the usual form of front step breaks the continuity of the surface, and thus not only creates an unsightly appearance but also impairs the function of the casing, both with respect to 25 preventing the formation of eddy currents, and with respect to de?ecting objects away from the track. The principal object of the present invention is to provide a form of step and a manner of 30 mounting it upon the front end of a vehicle which overcome the above recited difficulties. A further object of the invention is to provide a step which is of simple construction, relatively inexpensive to manufacture and assemble, and 35 adapted to be swung from a service position in 'which it projects in a substantially horizontal plane to a housed position in which it lies flush with the exterior surface of the front end of the vehicle. 40 Other objects and advantages characteristic of this invention will become more fully apparent from the description hereinafter set forth of one example or embodiment thereof having reference to the accompanying drawing. 45 Of the drawing: Fig. I represents a front elevation of a steam locomotive to which a pair of front steps em bodying this invention have been applied, one at each side. 50 Fig. II represents an enlarged cross section, taken as indicated by the linesII-II of Fig. I, showing a front step in service or horizontal position. Fig. III represents a similar cross section, with 55 certain parts broken away for clearness of illus (Cl. 105-2) tration, showing the step in housed or upright position. Fig. IV represents a perspective view of the step with the mounting brackets therefor rep resented in dot-and-dash lines; and, Fig. V represents a perspective View of one of 5 the mounting brackets. With reference to the drawing, there is selected for typical illustration a steam locomotive hav ing a rounded nose I and wide sweeping skirt 2 10 in the form of an exterior casing of relatively thin metal surrounding the body of the vehicle. The pilot and pilot beam are represented in out line in Fig. I in broken lines as indicated at 3; and while the specific construction of the frame 15 of the locomotive is relatively unimportant for the purposes of this invention, it will be noted that the steps 4, which are hereinafter more speci?cally described, derive their support through angle bars 5 secured directly to the pilot. 20 As clearly shown in Figs. II and III, the ex terior casing which forms the skirt 2 is spaced at a distance from the wall 6 of the pilot. Each angle bar 5 has bolted rigidly thereto a pair of brackets 1 which form connections for pivotally 25 mounting a step 4. The particular construction of the mounting brackets ‘I may, of course, be varied considerably, but desirably these brackets have lugs 8 thereon which afford stop shoulders 9, H] for limiting angular movement of the step. 30 In the form illustrated in the drawing, each step 4 comprises a tread portion II, a riser l2, and side guards I3, formed as an integral casting. Trunnions l4 project from each side of the step and engage corresponding apertures in the 35 mounting brackets ‘l. The ‘skirt 2 provides a smooth well-rounded surface extending across the front end of the locomotive. Openings l5 are provided at each side of the skirt 2 for the accommodation of the 40 steps 4. Each such opening l5 corresponds in shape and size to the step 4 associated with it. Accordingly, when the step 4 is swung to the ver tical or housed position, it ?lls the opening i 5 and provides a smooth surface continuous with 5 the exterior surface of the casing. On the other hand, when the step 4 is in the horizontal or service position, it projects freely through the opening and substantially beyond the casing. It will be noted that in the service position the step is substantially out of contact with the casing 22, so that the Weight of a person standing thereon is not communicated to the relatively weak wall of the casing, but is carried by the relatively 55 2,130,837 2 strong angle bars 5 which form a part of the pilot. The stop surfaces 9 of'the brackets 1 limit the downward movement of the step 4 by engagement with ledges [6 formed adjacent to the trunnions It. In like manner the stop surfaces H] of the brackets ‘l limit upward swinging of the step by engagement with shoulders IT formed above the trunnions M. Thus the step 4 is limited to an 10 angular movement of approximately 90°. Each step a is so mounted and so weighted that it tends to fall by gravity from housed position to service position. To retain the step in its up right position, a latch i3 is provided immediate 15 ly above the opening l5, such latch including a ?nger piece !9 and a plate 20 which engages against a slot 2! formed in the outer edge of the step. - It will be observed that the steps 4 are nor 20 mally housed in upright positions, and when so housed they form with the skirt 2 of the loco motive smooth uninterrupted surfaces. Thus the difficulties are avoided which arise when steps are used which are ?xed in position and project 25 outwardly from the front end of a locomotive. Such ?xed projecting steps cause the formation of eddy currents and not infrequently catch ob jects struck by the locomotive and prevent such objects from being cast away from the track. While the present invention has been described 30 with reference to one form thereof, as applied to a steam locomotive, it .will be'apparent to those skilled in the art that this invention has many other applications, and that various departures 35 may be had as to the form of ‘the step and the manner of its mounting, without departing from the spirit of the invention as de?ned in the an nexed claims. Having thus described my invention, I claim: 1. Ina railway vehicle including a frame and a relatively thin exterior casing spaced therefrom in surrounding relation, said casing having an opening therein unreinforced at its edges, a, sup porting element attached to the vehicle frame and located entirely within said exterior casing and disassociated from it, a step supported whol ly on said supporting element and having a piv otal connection therewith, said step being adapt ed to fall by gravity from a vertical position, wherein it ?lls the opening aforesaid and pro vides a surface continuous with the exterior shell to a horizontal position wherein it projects through said opening in the exterior shell sub 1O stantially beyond the exterior surface thereof, an externally operable latch means for holding said step in its vertical position, and stops associated with said pivotal connection and engaging sur faces on said step to limit the angular movement 15 of said step between said vertical and said hori zontal positions. ' 2. In a railway vehicle including a frame and a relatively thin exterior shell spaced therefrom in surrounding relation, said shell having an opening therein unreinforced at its edges, a sup» porting element attached to the vehicle frame and located entirely within said exterior shell and disassociated from it, a step supported whol ly on said supporting" element and having a piv 25 otal connection therewith, said step being adapt ed to fall by gravity from a vertical position, wherein it ?lls the opening aforesaid and pro vides a surface continuous with the exterior shell to a horizontal position wherein it projects through said opening in the exterior shell sub stantially beyond the exterior surface thereof, an externally operable latch means for holding said step in its vertical position, and stops asso ciated with said pivotal connection, one of said stops contacting said step in its horizontal po sition and preventing downward movement there of, and an additional stop contacting said step in its vertical position, and preventing backward movement thereof, said latch means when op erated serving to hold said step tightly braced against said additional stop. - BENJAMIN H. BRENNER.