US686247A - Center-plate for car-trucks. - Google Patents

Description

No. @E241 Patented Nov. l2, |9ol.

J. c; BARBER. Y

CENTER PLATE F08 CAB TRUCKS.

4 (Application med mine a, 1901.)

Patented Nov. 12, 1901.'

.1. c. BARBER.

CENTER PLATE FOR CAR TRUCKS.

(Aplucation med June 3, 1901.1

2 Sh ,ets-Shee 2.

(NIJ Model.)

ilaria STATES *PATENT FFICE.

JOHN C. BARBER, 0F CHICAGO, ILLlNOIS.

` CENTER-PLATE FOR`CAR1T'BQCKS.

SPECIFICATION forming part of Letters Patent N 0. 686,247, dated November` 12, 190i.

Application filed June 8,1901.

To mit wwnt t mrtg/concern:

Be it known that I, JOHN C. BARBER, a citizen of the United States, residing at Chicago, in the county of Cook and State'of Illinois, have invented certain new and useful Improvements in Center-Plates for Car-Trucks; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enableothers skilled in the art to which it appert'ainsto make and use the same y My invention has for its object to provide an improved center-plate for car-trucks and other uses.

To this end my invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the aecompanying drawings, wherein like notations refer to like parts throughout the several views.

Figure l is a View showing the center-plate in elevation and the bolstcrs in cross-section, with some portions broken away. Fig. 2 is a plan view ofthe bottom member ofthe centerplate detached. Fig( 3 is a view in crosssection through the center-plate and bolsters on the line c3 te of Figs. 2 and 4, with the parts in working` position; and Fig. :Il is a plan View of the top or upper member of the center-plate detached.

The bottom member of the center-plate is of such construction as to aiord-base-flanges a, by which the plate is secured to the truckbolster, shown as 'made up of I-beams l, by means of bolts 2 passing through the said flanges of the plate and the outer flanges of the I-loeams 1. (Shown in Fig. 2.) The bottom member of said center-plate is'also of such construction as to afford a raised bearing-surface ct, of convex form, on its face. This body or bearing portion u of the lower member is provided with a hub-seat d2, surrounding the center-pin passage, and is also provided with a series of radial grooves or` channels a3, extending outward from points near 'the hub-seat u? to the junction of the raised body with the-flat lian ges a of the plate, thereby affording clearing-channels, which are open at their outerend. The lower member of the center-plate is also provided with raised segmental. flanges u for cooperation Serial No. 62,819. (No model.)

v with the hub-seat a2 to take the buling shocks or forward and backward strains from the upper member ofthe two' center-plates.

The upper member ot the two center-plates is of such construction as to afford a downwardly-extended hub b for working in the hub-seat a2 of the lower member, as best shown in Fig. 3, and to afford a concave 'bearing surface or face b for coperation with the raised or convex bearing-surface a of the lower member. The upper member is also provided with the extended horizontal fianges b2, by which the same is bolted to the' bodybolster 3 of the car. The upper mewmber is provided with raisedtlanges b3, adapted to receive and embrace the said body-bolster 3.

When the parts are in working position, as shown in Figs. l and 3, itis obvious that the two plates are pivotally connected by their cooperating hub and hub-seat, and in practice would also be connected to the car and to the car-bodybyacenter-pin. (Not shown.)

The forward and backward thrusts or buiing strains will be taken from the hub and outer edges of the upper plate onto the hubseat and the raised flanges of* of the lower plate. The raised anges a4 therefore reinforce and relieve the hub and hub-seat from a large part of the bufting strains, and thereby greatly increase the strength and durability of the center-plate.

In view of the convex form of the bearing surface or face of the lower member and the radial channels or grooves as provided therein it follows that water, rust, dust, or other sediment cannot accumulate between the bearing-surfaces of the two cooperating members making up the center-plate. Water of course will be shed from the lower, member owing to the convex form of the bearing-snrface, and any dust, rust, dirt, or other sediment which might otherwise 'accumulato thereon will be worked out through the channels af under the swiveling movement of the two members with respect to each other. The radial channels insure a clearing action for the reason that said channels will catch the sediment under the swiveling movement of the two members in respect to each other and permit said sediment to move radially outward and downward without being clamped between the bearing-surfaces.

ICO

' or I-beam forms.

most generally employed, and have beenl shown in Figs. l and 3 ofthe drawings, These shortening the life of the center-plate in the This serious defect is entirely overl service. come by my invention, as above described.

As another feature of large advantage this improvedcenter-plate is better adapted for use on the type of truck-bolster now coming into most general use. The prevailing tendency in car-truck construction is to substitute metallic for wooden parts. Metallic bolsters are now most'generally embodied in all new rolling-stock. These metallic bolsters are usually made up of standard structural forms, such asthe channel, angle-iron, The I-beams are the form I-beams are usually so set that their inner or facing Iianges do not meet, but stand spaced apart from each other throughout the central portion of the bolster or at the place whereV the center-pin would pass through the meni- The lower meinber of the center-plate must therefore span bers of the center-plate.

or bridge this opening between the I-beam anges of the truck-bolster, and when the load is'taken at the center ot the center-plate, as in the old form, breakage is likely to occur. Otherwise stated, the old form of center-plate is not welladapted to this bridging action, because it is Weak and unsupported from below at the point of the greatest strain.

With my improved form of center-plate, hcreinbefore described, the body or main portion of the bearing-surface is radially outward of the hub and the hub-seat connecting the two plates, and hence the strain is taken on parts of the lower member which directly overlie and are supported by the 5o flanges ofthe I-beams l making up the truckbolster. This improved center-plate is therefore well adapted for use with metallic truckbolsters made up of the standard structural forms--such as I-beams, channels, or anglebeamsunow most generally employed.

It will be understood that the construction yl'night be changed in detail without departing from the spirit of the invention.

lVhat I claim, and desire to secure by Let- 6o ters Patent of the United States, is as follows:

l. A center-bearing plate composed of an upper and lower member connected for swiveling movement in respect to each other, the

upper member having a concave bearing-sun.

face, and the lower member having a convex bearing-surface, at least one of said bearingsurfati-es having.,r radial clearing grooves, whereby water, dust, rust or other form of materials cannot accumulate between the 7o bearing-surfaces of the two plates, but will be worked off and out through said clearinggrooves, substantially as described.

2. A center-plate composed of an upper and a lower member connected for swiveling mo .rement in respect to each other, the upper member having a concave bearing-face and the lower member having a convex bearingl'aco provided with radial clearing-grooves,

wherctrr;water, dust, rust or other foreign 8o materials cannot accumulate between the bearing-surfaces of the two plates but will be worked oil? and out through said clearinggrooves, substantially as described.

ln testimony whereof I affix my signature in presence of two witnesses.

JOHN C. BARBER. lVitnesses:

JAS. F. WILLIAMSON, F. D. MERCHANT.

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