US270918A - Thomas van aernam - Google Patents

Description

(No Model.)

T. VAN AERNAM. WBAR PLATE F'o WAGON BoLsTERs.

No.- 270,918. Patented JM1.Q18 83.l

UNITEDY STATES Parlava* FFICE.

THOMAS VAN AER-NAM, OF ALBANY, NEYV YORK.

WEA R-PLATE FOR WAGON-BOLSTERS.

SPECIFICATION forming part of Letters Patent No. 270,918, dated January 23, 1883l Application filed October 13, 1882. (No model.)

To all 'whom it may concern Be it known that l, THOMAS VAN AERNAM,

a. citizen ot' the United States,'and a resident of the city and county of Albany, in the State ot' New York, have invented new and useful Improvements in Wear-Plates for Bolsters of Sand and other Wagons, otl which the following is a specification.

My invention relates to wear-plates for bol sters of sand and other wagons in which the upper and lower wear plates are made of chilled iron on their wearing sides, and combining the elements 0r devices hereinafter more particularly set forth and described.

The. object ot my'invention is to provide wear-plates for holsters and axles of wagons, which will have their wearing-surfaces ofchilled iron, capable of reducing the friction to a minimum as compared with the soft-iron plates heretofore employed, and which will also have a chillediron circular engaging projection and recess made solid therewith about their kingbolt holes for relieving the king-bolt from strain,lalso increasing the vertical length of the king-bolt holes in said plates, and relieving the strain of the plates on the attaching bolts and clips. I attain tliisjobject by means of the devices and elements illustrated in the accompanying drawings, in which similar letters of reference refer to similar parts throughout the several views. A

In the drawings, Figure l represents a plan view of the axle wear-plates; Fig. 2, a plan view of the bolster wear-plates; Fig. 3 is a cross-sectional view of said plates when conjoined and secured to their respective parts of the wagon. Fig. 4 is a sectional elevation of the saine.

Inthe drawings, A represents the axle of the wagon,` and B the bolster. Heretofore it has been the practice to make wear-plates between said axle and bolster of soft wroughtiron and of uniform thickness throughout, with holes made central in the same for receiving king-bolts of large diameter. These old forms of plates were secured from shifting on their respective parts of wagon by bolts or clips. The great disadvantages attending the use of said old form of wear-plates were their excessive friction, which would' cause them` to wear rapidly away, so as to reduce the vertical length of theking-bolt holes, and thereby cause the king-bolt to be rapidly cut at-about -its center of length, while at the sametime this excessive friction would impose greater labor on the animals when turning the fore part ol' the Wagon. The excessive enlargement of the king-bolt holes and lessening of the diameter ofthe king-bolt would operate to permit the bolster to shift in relation to the axle, while at the same time the heads of the bolts securing the plates to their respective parts of the Wagon would be worn away and be drawn out of place, while the secure attachment of these old plates from 'shifting could not be had, as the excessive friction attending their use would cause a dragging of one plate on the other and cause the plates to wear the wood and become loose. These 'disadvantages are wholly overcome aud removed by myA improved wearthrough-its convex projection b and bush d for forming the king-bolt hole'c, of about one inch diameter. I prefer to make the chilled portion of said axle-plate about twelve inches long by about iive inches wide at its middle of length, and at the ends of said chilled portion is formed the transverse recess f for receiving clips g for securing said plates to the axle.

The bolster-plate D consists of a cast plate having its upper or face side portion, a,made of chilled iron. Made central in the same is a concave recess, b', bounded by an annular recessed step, c', corresponding in size and form with the projectionb and ring-step c, made with the axle-plate. The metal of said recesses b and c are also of chilled iron. Made solid with said bolster-platc and with the side opposite from the recess b' is the bush d. A central king-bolt hole, e', is provided,running through bush d and central with recess b', as shown.- Countersunk holesf are made in said vIO() and king-bolt will be greatly lessened.

bolster-plate for receiving bolts g for securing it to the bolter. The said wear-plates are each secured to their respective parts ot' the Wagonthe axle-plate C to axle A by clasps g, and the bolster-plate D to bolster b by bolts g', as shown-and the king bolt E'is inserted in place, when the bolster Will be coupled with the axle.

In practice the convexity ot' the projection b and concavity of recess b will operate to prevent sand or gritty substances from Working iu between the king-bolt hole andthe kingbolt. The bushings d and d increase the V'length ot the king-bolt holes, so as to greatly enlarge the extent ot' surface of the boresot' said holes, so that the Wear ot' the said holes The projecting step c of plate C and the recessed step c ot' plate D operate to relieve the kingbolt E from Wear and transverse strain, and transfer the friction from the king-bolt to the larger surfaces of said steps. The bushings d and d operate Wit-h the recesses L and h in the Wood ofthe axle and bolster to relieve the clasps and attaching-bolts of strain. The chilled face side portions ofthe said plate and their respective recesses and projections Operate together to reduce the frictional wear to a minimum, and prevent the reduction of the king-bolt hole from the upper side of the bol` v be secured to axle A, and having Wearing-face t a', convex projection b, and annular step c, of chilled iron, and bush d, with king-bolt hole e, ofthe bolster-plate D, adapted to be secured to axle B, and having wearing-face a', concave recess b', and recessed annular step c', of

chilled iron, and bush d, with king-bolt hole c', adapted to be held together by king-bolt E, passing through said bolster-plates, and axle, substantially as and tor the purposes set forth.

THOS. VAN AERNAM. Witnesses:

RICHARD P. DUMARY, ALEX. SELKIRK.

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