US378139A - Benjamin a - Google Patents

Description

(No'Model.)

B. A. LBGG.

CHAIN POB. GONVEYBRS.

Patenfed Feb. 21, 1888..

WL' la @9565/ @ave/6201,' 0l, M

llniTn STATES PATENT Tricia BENJAMIN A. LEGG, OF COLUMBUS, OHIO, ASSIGNOR. TO THE LECHNER MANUFACTURING COMPANY, OF SAME PLACE.

CHAIN FOR CONVEYERS.

SPECIFICATION forming part o1 Letters Patent No. 378,139, dated Februaryv 21, 1888.

Application filed December 1S, 1856. Serial No. 221,934. {No model.)

To all whom 2215 may concern.:

' Be it known that I, BENJAMIN A. Lues, a citizen of the United States, residing at Colnm bus, in the county ofv Franklin and Stateof Chio, have invented certain new and useful Improvements in Chains for Conveyers, of which the following' is a specification, reference being had therein to the accompanying drawings.

Figure l is aside elevation of myinvention. Fig. 2 is a top or plan view. Fig. 3 is a vertical section on line fr: cv, Fig. l. Fig. 4 is a horizontal section on line y y, Fig. l.

rlhe object of this invention is to construct an endless carrier which shall run with but little friction, and consequently require but little power and involve a comparatively small wear of any of the'parts.

Like letters indicate like parts in all of the iigurcs.

Prior to the date of my invention it was customary to construct horsepowers and similar machines with metal links arranged in pairs at opposite ends of the lags l upon which the horse walks, these links being tied to each other by rods a little longer than the width of the endless platform, and having anti friction wheels mounted upon the ends of those rods outside of the ends of the lags to run upon supporting ways or tracks. ln machines of this sort it was customary to construct the links with lugs or downward extensions at each end to receive these rods, in order that the rods might take into notches of the wheels traversed by the endless platform; but in such machines it would have been impossible to mount the antifriction wheels above referred to hetween the links and underneath the lugs. Again, in Patent No. 340,321, to Jeffrey, there is shown a chain having anti-i`riction rollers surrounding the pintles and traversing asupportingtrack; butin that chain thepintles are in line with the side bars of the chain, so that the anti-frictiourollers project equally above and below the edges of the side bars, whereby itis necessary to interpose a series of upwardlyprojecting ears or wings between the conveyerbottoms and the side bars.

My invention relates to side bars provided at their ends with downwardlyprojecting lugs having pintle-seats, whereby the upper edges of the chain-links may be formed on straight lines,and thereby adapted to receive and support the conveyor-sections throughout practically their entire length.

A B C D indicate, respectively, the bars, the legs, and the inwardly -projecting sleeves of which thelinks are formed. Ot these parts the leg Aprojects downward from the end of the side bar, B, and is provided with a pintle-seat,a. These pintle-seats are by preference slightly longer in one diameter than the other, for a purpose which will be explained. Each leg C is provided at its lower end with an inwardlyprojecting sleeve, D, having a pintleseat, d, which is circular in crosssection and of substantially uniform diameter throughout.

By an examination of Fig. 2 it will be seen that the legs A A are not in plane with the barsB B,but are connected therewith by brackets or offsets bb and strengthening webs or plates a c upon their outer faces, and on Fig. 1 it will be seen that these webs are ilush with the upper faces of the bars and the ends of the legs.

c c are holes in these Webs 'to receive the bolts or rivets.

E E are the pintles, each provided at one end with a fiat head, the opposite end being forked or split, thus forming tangs, which, alter the chain is put together, are riveted over against the outer faces of the legs A A, as indicated at e e. By preference the piutles are turned round, so that when this riveting is eected the tangs shall overlap the longerdiameters of the pintle-seats a c, whereby the piutles are rml y locked in their seats, so as to be incapable of rotation relatively to the legs A A. This form of articulation is very desirable, because it insures that the wear shall comeprincipally, if not wholly, upon the circular seats in the sleeves and the adjacent portions of the pintles, thus insuring great durability of these parts.

F F are anti-friction rollers mounted upon the sleeves D D.

lt will be readily seen that by the use of my invention anti-friction rollers of large diameter can be used without their projecting above the upper or outer faces of the side bars.

G G represent the deck or flooring of the conveyeigwhich is made in sections of suitable length and secured to the chain by bolts passing through the deck and the holes cc in the Webs or strengtheningplates c c.

By thus constructing the links of side bars with downward-projecting legs at their ends to receive the pintles Iam enabled to construct a chain whiclnwhen straightened out in Working position, has a practically-continuous surface to receive and support the platform or deck,which is very desirable under many circumstances, especially when it is requisite to form the deck or Hooring of light thin materiaLeither Wood, metal, straw-board, or other analogous material for the transportation of weighty substances.

By the use of my invention I am enabled to use anti-friction rollers of quite large diameter with but slight additional Weight of metal o in the chains7 it being apparent that the only increase in metal which is required with' an increase in diameter of the rollers is enough to increase the length of the lugs one-half of the increase of the diameter of said rollers.

The herein-described chain for conveyers,

having the separable side bars provided at their t

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