US852362A - Dump-wagon. - Google Patents

Description

PATENTED APR. 30, 1907.

1) s WATSON DUMP WAGON. APPLICATION FILED JAN.15, 1907.

UNITED srarns PATENT ori ren;

DAVID S. WATSON, OF OANASTOTA, NEW YORK, ASSIGNOR TO WATSON WAGON COMPANY, OF CANASTOTA,

OF NEW YORK.

DUMP-WAGON.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed January 15,1907 Serial No. 352,458.

To all whom it may concern.-

Be it known that I, DAVID S. WATsoN, of Oanastota, in the county of Madison, in the State of New York, have invented new and useful Improvements in Dump-Iagons, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improve ments in dump wagons in which the dump box is provided with laterally swinging bottom doors meeting near the longitudinal centers of the box when closed, and controlled by suitable chains or cables passing under said meeting edges and having their rear ends connected to an equalizer, and their front ends attached to a rotary drum upon which the front ends of the cables are wound and unwound during the operation of closing and openin the doors.

In this class of ump wagons in which the doors are controlled by separate chains it is desirable to provide one door with a ledge or projection adapted to over-lap upon the other door to close the gap at the meeting edges for the purpose of preventing leakage of the material therethrough, and it therefore becomes necessary to close one door having the ledge thereon slightly in advance of the other door when the doors are drawn to their closed position. It is also necessary to provide a suitable equalizer to compensate for any slight inequality of the lengths in the cables, as it is well known that these chains or cables after a short period of use, stretch or lengthen unequallyv In my allowed application No. 326,618, filed July 17, 1906, I have shown an equalizer to compensate for unequal lengths of chain or cable, similar to that shown in my present application and in the joint application of Watson, Sanderson and Bushnell filed October 16, 1906, Serial No. 339,229, is shown a a device brought into action by the opening of the doors to cause one door to close earlier than the other during the winding of the cable upon the drum.

In my allowed application above referred to, I employ two rocking members connected together by a suitable link and having bearings for the chain which are located equidistant from their swinging axes, and in the joint application referred to, these chains are tied together below the equalizing members.

The object of my present invention is to accomplish both the equalizing effect and advance closing of one of the doors before the other by means of the two rocking members linked together, but pivoted at different distances from their peripheral bearings upon which the chains ride, thereby doing away with the tie-piece and othersimerlluous mechanism and enabling me to not only close one door slightly in advance of the other, but also to compensate for any slight inequality in the length of the chains by one and the same mechanism. In other words, I have sought toreduce the number of parts, thereby simplifying and reducing the cost of any compensating and adjusting mechanism, and at the same time; assuring the closing of one of the doors earlier than the other after each discharge of the load.

Other objects and uses will be brought out in the following description.

In the drawingsl*igure 1 is a rear end view of a portion of a dump wagon showing my improved equalizer, partly in sertioi'i, and partly in elevation, and also showing a portion of the winding drum at the front of the box, the doors being shown in their closed position. Fig. 2 is a sin'iilar rear end view with the doors in their open position, and the equalizing members in elevation. l 3 is an enlarged detail sectional view of the equalizer seen in Fig. 1, but dotted in the po sition seen in Fig. 2.

As shown in the drawings, this equalizer comprises essentially two rocking members 1- and 2 which are pivoted respectively upon suitable bearings *3 and. 4 and are provided with inwardly extending arms which are connected at their upper ends by a link 5 so as to transmit motion from one rock-arm to the other. These rock-arms are mounted in a suitable frame 6 as close to each other as possible to permit the chains to ride freely between them, the adjacent faces of said rock-arms being provided with curved bearings S and 9'- terminating at their upper ends in hookshape extremities 1()- to which the rear ends of the cables, as ]1-, are adj ustably attached, as best seen in Fig. 1. These opposite door.

curved bearing faces 8 and 9 are arranged at different radial distances from their respective ivot bearings -3 and 4, the curvec bearing 8 being concentric with its pivot 3, while the curved bearing 9 of the rock-arm 2 is preferably eccentric, the pivotal axis of the arm 2 being nearer its curved bearing face on a rotary line drawn between the axes of the arms 1 and 2 than that of the arm 1 so that the active leverage exerted by the chain on the rock-arm 1 is greater than that exerted upon the rock-arm -2.

As previously stated, the rear ends of the cables or chains 1 1- are seated in the grooved bearings 8- and 9 in the adjacent faces of the rocking members 1 and 2 with one of the links of each chain detachably and adjustably interlocked with the hooks or shoulders 10, said chains being then passed downwardly under the meeting edges of the laterally swinging bottom doors, as a and a/- of a dump box A and their front ends are attached to a Winding drum 12- which may be actuated in any desirable manner not necessary to herein illustrate or describe, except that it is located on the front end of the box in the usual manner in a plane above the front ends of the doors.

The door a is rovided at its meeting edge with a lengthwise ledge 13 adapted to overlap upon the upper face of the meeting edge of the opposite door a for the purpose of closing any intervening gap between said meeting edges and preventing escape of the material therethrough. It therefore, becomes necessary to close one door, as the door a slightly in advance of the door a, and for this purpose the distance between the pivot 4 and bearing 9 of the rock-arm 2 is less than the distance between the pivot 3 and bearing 8- of the rock-arm 1 so that when the drum is released to allow the doors to open by their own gravity the weight upon the doors tending to open the same, is transmitted through the chains 11-. to their respective rockarms 1 and 2, and inasmuch as the chain 11 of the rock-arm 1 is engaged therewith at a oint farther than from the axis of the roc -arm 1 than the other chain 11 with its rock-arm 2, it is clear that the rock-arm, as 1, having the longer leverage will be rocked toward the opposite rock-arm 2, to which latter motion will be transmitted in the same direction by the connecting link 5. During this simultaneons action of the rock-arms by the opening of the doors, it is evident that the door which is connected to the rock-arm by the longer leverage will be allowed to open through a slightly greater are than the In other words, the movement of the arms 1 and 2 in the direction indicated by arrow -X by the opening of the doors, causes the rock-arm -1 to let out upon its corresponding chain 1 1 while the rock-arm 2' takes up slightly upon its corresponding chain so that when the doors reach their corresponding positions, the door a corresponding to the rockarm -2 is held or drawn by the rocking of the arms -1 and 2 nearer to its closed position than the door a, and during thewinding of the cables upon the drum 12 this relation continues, until the door a/ is closed against the under side of the box, whereupon the continued Winding of the cables causes an extra pull upon the arm 2 inside of its pivot, thereby rocking both members 1 and -2 in the opposite direction to that indicated by arrow X, which causes the door a to be drawn to its closed position with its meeting edge folded under the ledge 13- of the previously closed door a.

In the first adjustment of the door operating cables or chains 11- and equalizer the rock-arms 1 and 2 are preferably disposed in a nearly upright position, as seen in Figs. 1 and 3, when the doors are closed, but as soon as the winding drum 12- is released to release the doors, the latter swing downwardly, and aided by the load, and either during or at the end of such mo vement, the load or pull transmitted to the rocking members -1 and 2 at the inner sides of their pivots, causes them to be rocked in the direction indicated by arrow X- to hold one door nearer to its closed position than the other, so that upon the rewind in closing the door, the one having the overlapping ledge will be closed first, whereupon the continued 'winding of the drum will cause the rocking of said members in the opposite direction to close the other door.

What I claim is:

1. In a dump wagon, a dump box having downwardly and laterally swinging bottom doors meeting at substantially the longitudinal center of the box, one of the doors having a portion of its meeting edge overlapping upon the other door when closed, cables passing under the meeting edges of the doors and winding means therefor, an equalizer consisting of a pair of rock arms having bearings for the cables at different distances from their swinging axes, whereby the overlapping goor is caused to close earlier than the other oor.

2. In a dump wagon, a dump box having laterally swinging bottom doors, chains passed under the doors, a winding drum connected to the front ends of the chains, and an equalizer connected to the ends of the chains, said equalizer comprising a pair of rock-arms having chain bearings at different distances fromtheir swinging axes whereby the pull exerted by the opening of the doors always rocks the equalizer arms in the same direction and causes the doors to swing through unequal arcs, the one moving through the lesser are being the first to close when the cables are wound upon the drum.

3. In combination with the swinging bottom doors of a dump wagon and their operating cables, of an equalizer consisting of two rocking members connected to the chains or cables at different distances from their swinging axes, whereby the doors are caused to swing through unequal arcs so that the door moving through the lesser arc will be closed first and operate through its cable or chain to rock the equalizer to take up the lag in the other door.

4 In combination with the swinging bot tom doors of a dump wagon and controlling cables therefor, winding means for the cables and an equalizer consisting of two rock-arms arranged side by side and having their adj a cent faces operatively connected to the cables at different distances from their swinging axes, whereby the doors are caused to swing through arcs of diflerent lengths so that the one swinging through the arc of lesser length will close first and operate through its cable to move the rocking members of the equalizer to take up the lag of the other door during the continued winding of the cables on their winding drum.

In witness whereof I have hereunto set my hand this 9 day of January 1907.

DAVID S. WATSON.

WVitnesses:

HOWARD P. DENIsoN, CAROLINE MeCoiumoir.

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