US1118908A - Pedestal for car-trucks. - Google Patents

Description

H. M. PPLAGER. PEDESTAL FOR CAR TRUCKS, APPLICATION FILED JUNE 20, 1014.

Patented Nov. 24, 1914.

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HY M. PIFLAGER, OF ST. LOUIS, MISSOURI. ASSIGNOR, BY MESNE ASSIGNMENTEI, T1) COMMONWEALTH STEEL COMPANY, A CORPORATION OF NEW JERSEY.

PEDESTAL FOR CAR-TRUCKS.

Specification of Letters Patent.

Application filed lfune 20, 1914. Serial No. 846,811.

To all whom it may concern:

Be itknown that I, HARRY M. Prnacnn, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Pedestals for Car-Trucks, of which the following'is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,'forming part of this specification, in which- Figure 1 is a side elevational view of a pedestal of my improved construction with a portion of one of the horns'or'jaws in vertical section. Fig. 2 is a plan view of one of the pedestal horns or jaws. Fig. 3 is 'a horizontal section taken approximately on the line 3-3 of Fig. 1. Fig. 4 is a'rear elevational view of one of my improved pedes tal jaws or horns.

My invention relates to new and useful improvements in pedestals for passenger car trucks, the principal object of my invention being to generally improve upon and simplify the construction of the commonly used types of pedestals, and provide a construction wherein either one of the pedestal horns or jaws may be readily detached from the truck frame without disturbing the opposite or mating jaw, which arrangement not only greatly simplifies, but effects a material saving in time and labor in repairs, where either horn or jaw becomes broken or unfit for service. I

To prevent excessive wear of the pedestal horns or'jaws where they contact with the journal boxes, the inner faces and bearin ribs of the jaws are provided with hardened surfaces, and where the pedestal is made in a single piece as ordinarily constructed, it is a very diflicult matter to grind the bardened surfaces on the inner faces of the jaws, which operation is necessary in finishing the pedestal jaws so as to insure a proper working fit. By makin the jaws separate, the hardened metal sur aces which serve as bearing-facees for the journal box can'bc readily ground and finished.

Heretofore it has been the eneral practice to form the pedestal in a single castin substantially of inverted U-shape, said pe estal being attached to the wheel piece of the truck by two vertical and three horizontal bolts.

Practically the only normal load that the pedestals are subjected to is produced by the application of the brakes to the car wheels and the pressure resultin from this load is transmitted through t e wheels, axles, journal boxes andtheir parts to the inner faces of the pedestal jaws, and where the pedestal is made in a single piece, all of the attaching bolts act in a certain degree to resist the strains thus roduced, and prevent the pedestal from being separated from the truck frame.

Where cars are involved in a wreck, it has been noted that the first parts of the truck to fail or break are generally the pedestals, and if one horn or jaw of a pedestal is broken, the entire pedestal has to be replaced, but where the pedestal horns or jaws are made separate as contemplated by my invention, eitherpne may be readily replaced in case of breakage, without disturbing the mating horn or jaw.

My invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed.

As will be seen in the drawing, the jaws of my im roved pedestal are separately formed an made in rights and lofts in order that thev can be properly arranged in airs on the wheel piece of the truck frame. iach horn 'or jaw comprises an outer wall 10 and an inner wall 11, and uniting the lower ortions of these walls is a substantially shaped web 12. The horizontal leg of this web 12 is provided with an aperture 13 which receives the bolt utilized in attaching the bit or tie bar which connects the lower ends of the edestal jaws.

Formed integral wit and connecting the upperouter portions of the walls IOand 11 is a horizont 'lly' disposed web plate 14 which, when time pedestal is applied to the truck frame, bears directly against the underside of the wheel piece, and formed through this webplate 'is'an aperture 15 which receives the vertical bolt that serves as a part of the pedestal attaching means. The outer plate 10 is provided at its upper end with an upwardly projecting extension 10 which lies against t e outer ace of the wheel ieco the truclr frame, and'ftormed throng this extension is a series or apertures 16 which receive the horizontallydisposed bolts utilizedin attaching the jaw to the wheel piece of the truck frame.

Formed integral with the inner edges or the plates 10 and 11 are vertically disposed outwardly projcctinghearin ribs or flanges l7, and'the inner edges or and plates 10 and and 11 and the outer faces oi? these flanges are hardened in any suitable manner to pro vide wear resisting surfaces forthe journal box; which is positionedloetween the horns or jaws. f

"By forming the pedestal jaws or -horns separate the grinding lot the hardened surfaces is greatly facilitated and consequently said. horns'or jaws can he finished with the expenditure of comparatively-little time and lahor.

.lln'case either jaw or horn becomes broken or unfit for service, it can :bereadily removed and a new part substituted Without detachingthe companion jaw, thus efiecting a material saving in the cost of repairs.

lln practice when the brakes are applied, force 18 applied to oneot the pedestal jaws inthe direction indicated by the arrow A in Fig. 1, which force tends to swing the jaw upon the fulcrum point K, Fig. 1. Such action produces shear-in stresses n on the horizontally disposed holts whic pass through the apertures 16, hut, of course, these bolts are made amply large to take care of said shearing stresses.

The lateral forces transmitted from the vjournal boxes to the pedestals are much smaller than those produced by brake application, and said lateral forces are readily taken care of by the vertical holt which passes through the aperture 15 in web plate 14,-, and the lower portion of the truck frame wheel piece.

Pedestals of my improved construction are comparatively siple, can he easily and cheaply manufactured, are so constructed.

as to facilitate machining and finishing of their wear receiving surfaces, and by forming the horns or jaws of thepedestals separate, a material saving in the cost and lahor or repairs is edected. v i

It will be readily understood that minor changes in the size, form and construction or" the various parts of my improved pedestal can he made and substituted for those herein shown and descrihed, without departing from the spirit or my invention, the

scope of which is claims 1,11 races set forth in the appended ll claim:

31 As a new article of manufacture, a pedetsal jaw comprising a pair of vertically disposed integrally connected plates, the 'inner edges of which are provided with hardened surfaces. 7

hits a new article of manufacture, a

pedestal jaw comprising a pair of integrally jaw comprising a pair of vertically disposed integrally connected plates having hardened wear receiving surfaces which are adapted to be engaged by the journal boxes positioned between said jaws.

5. A pedestal for car trucks comprising a pair of separately formed jaws, and each jaw comprising a pair of vertically disposed integrcll connected plates, and the inner edges c said plates being provided with hardened surfaces.

i 6. A pedestal for car truclrs comprising a pair of separately formed jaws, and each jaw comprising a pair of vertically disposed integrally connected plates, ribs on the inner edges of said plates, and the inner edges of said plates and ribs being provided with hardened surfaces.

7. As a new article of manufacture, a pedestal jaw comprising a pair of vertically disposed integrally connected plates, the inner edges of which are provided with finished hardened surfaces.

8. As a new article of manufacture, a

pedestal jaw comprising. a pair oi integrally llli connected plates, hearing rihs on the inner edges of said lates, and the inner edges oi saidplates and said bearing ribs heing pro vided with finished hardened surfaces.

lln testimony whereof I hereunto amt: my

signature in the presence o1? two witnesses,

this l'lth day of June, 1914i.

HARRY ll/l. PFLAGER. Witnesses:

Han C. Bnnnvnnn, Urro V. Mrnua

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