US 620371 A
Description (OCR text may contain errors)
'No. 620,37I. Patented Feb.- 28, I899. D. J. SHELDRICK.
00 N V E Y E R (Applicatioxi filed Doc. 3, 1897.)
2 Sheets8heat I.
Patented Feb. 28, I899.
2 Sheets-Sheet 2 j a? a #0 D. J. SHELDRICK.
(Application filed Dec. 3, 1897.)
UNITED r STATES 4 PhTENT ()FFICE.
JEFFREY, F SAME PLACE.
SPECIFICATION forming part of Letters Patent No. 620,371, dated February 28, 1899.
Application filed December 3, 1897. Serial No. 660,703. (No model.)
' act description of the invention, such as will enable others skilled in the art to which it appertaius to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon', which form apart of this specification.
Figure 1 is a side view of a section of chain: and showing the body part of one of my im-] proved attachments. Fig. 2 is a top plan Fig. 3 is a cross-section,=
view of the same. and Fig. 4 shows the interior of one of the parts of the attachment detached. Fig. 5 shows a section of a conveyer having a flight secured to the chain by the attachment when use is made of one form of intervening part. Fig. 6 is a plan view; Fig. 7, a section of a conveyer having a flight secured by the attachment, with a modified form of intervening part. Fig. 8 is a conventional illustration in plan of a conveyer embodying my improvements.
Heretofore numerous Ways have been followed or proposed in the fastening of flights, scrapers, buckets, &c., to conveyer-chains'of the class known as cable-chains or coilchainsthat is to say, chains made up of similar links, each formed of a round rod with ends welded together; but I have found serious disadvantages to be incident to each of these that are known to me.
A indicates the chain as a whole in the accompanying drawings, it being made up of the links a and a, formed and joined in the way described, those at a being at right angles to those at a. Y
B indicates the body part of the attachment. It is made up of two counterparts b 1). These are approximately as long as the open space within the vertical links a. They are formed with grooves or sockets 5*, extending from end to end, there being an edge flange at b b and a core or central flange at 12 When the two parts b b are brought together, they can inclose the two bars of one of the The inner half b of the attachment is cast,
with an inwardly-projectingplate D,as shown in Figs. 2, 3, 5, and '6. In a two-chain conveyer the attachments are arranged in pairs,
those of each pair opposite to each other and withthe plates D projecting inward or toward each-other. Each plate is provided with an aperture for a pivot or a hinge.
E'indicates the scraper or flight. As shown "atFigsio and 6, it is rectangular in form and at eachfendis provided with a bracket-piece riveted thereto and carrying a hinge-plate G. Hinge pintles or pivots at g are passed through the plates G and D.
In Fig. 7 a modified mechanism is shown. In this case each of the inner parts b of the attachment is formed with two inwardly-extending hinge-plates D D, and those upon one side are connected to those upon the other by a cross-bar H,.to which is secured the flight or scraper H. With a construction of this sort there is a firm support insured for the flight or scraper and also a secure fastening of the attachment to the chain-link. The link is surrounded by the gripping metal, and the bolts are passed between the side bars and are in such position as to obviate the expanding of the chain laterally or providing obstructions in the passage around the wheels; but it will be seen that as the flights are pivot'ally connected with eachof the supporting and propelling-chains each can move relatively to said chain about its pivot to accommodate itself to any slight variation in the speedof the chains, &c. It will also be seen by reference to the drawings that the flights are supported between the chains and that the attachments by which the flights are connected do not extend beyond the outer lines of the links athat is, the attachment lies between the outer side lines of the chain and does not increase the width thereof at any point.
I am aware that flights or cross-bars have been connected to two parallel chains by having the end part of each flight or bar extend entirely across the longitudinal links of each chain, as illustrated, for instance, in Patent No. 231,793, to S. W. Greenleaf; in Patent No. 5,145, to Cowling, and No. 285,664, to F. Pearce. I do not claim such devices as of my invention.
I am also aware that it has been heretofore proposed to construct special links for the chains, each link to be relatively longer than the majority of the links in the chain and each to have its side longitudinal bars flattened and perforated, so as to receive a hingepin for the flight, and combine with said links a flight with relatively-elongated ends adapted to receive the aforesaid pins in slots in the ends of the flight. These are types of the'devices above referred to as heretofore used or proposed and upon which the present construction is an improvement. In the present case the devices are adapted to be applied to any one of the links in an ordinary cablechain, and the axes of the flights are on vertical lines inside of the chains. The attachments require no special construction of link at any point. The chain can be made up and kept in stock in sections of considerable length, and when varying orders are received, some for conveyors with the flights at one distance apart and others for conveyors with flights at other distances, said orders can be rapidly filled without waiting to make up special lengths of chain sections with specially-constructed links to receive the attachments. The pivot-pins are situated inside of the chainl-links and do not require perforating or ot erwise weakening or altering any of the link It frequently happens with heavy scraper conveyers that for either of several reasons, such as the unequal loading of the flights or thejerkiug action upon one chain, the links on one chain or the other fail to track properly on the wheel and take the sprocket-teeth unevenly. At such instants if either chain is aifected by the leverage of the flight the distorting or twisting action upon the links just commencing to engage with the sprocketwheels is increased and the whole conveyeris often thrown from the wheels. By having the axes of pivotal attachment of the flights at lines inside of the chains this distorting or twisting action is avoided, and even though one of the flights should be slightly in advance of the other the attachment-links at each side are largely relieved of the strain of leverage and the chains engage with and remain upon the wheel.
What I claim is-- 1. A conveyor having in combination the two chains, each made of the links a and a to an opposite similar link on the other chain,
each attachment being formed of two parts, one part of each attachment having an inward-projecting hinge-plate, the bolts passing through the link a and binding together the parts of each attachment and the flight having a hinge connection with each of the hinged plates on opposite attachments, substantially as set forth.
2. In a conveyer, the combination of two parallel cable-chains, a flight or scraper adapted to extend transversely between said chains, and two attachments detachably connected to the ends of the flight by vertical pivots inside of the chain-links and each adapted to engage with a link in the adjacent chain, substantially as set forth.
3. In a conveyer, the combination of two parallel cable-chains, having adjacent links arranged at right angles to each other, an attachment detachably engaging a link in one of said chains a corresponding attachment on' the other chain, each of said attachments lying within the outer side lines of the chain to which it is attached, and a flight connected to said attachments by vertical pivots inside the chain-links, substantially as set forth.
4. In a conveyer, the combination of two parallel cable-chains, an attachment detach.- ably connected to a link in one of said chains, and having an inwardly-projecting flange or hinge-plate, a similar attachment detachably connected to a link in the opposite chain, a scraper-flight provided at its ends with laterallyprojecting ears or lugs, and pins pivotally connecting said ears or lugs on the flight with the inwardly-extending flanges on thechain attachment on lines inside the chains, substantially as set forth.
5. In a conveyer, the combination of two parallel cable-chains, an attachment encircling and secured to one link of one of said chains and having an inwardly-extending flange or lug and a similar attachment connected to a link in the other chain, a flight arranged between the chains, and provided at each end with a pair of laterally-projecting lugs or cars, the flanges or lugs on the chain attachments being adapted to lie be-v tween the lugs on the adjacent end of the on the flight with the flanges on the attachments, substantially as set forth.
In testimony whereof I aflix my signature in presence of two witnesses.
DAVID J. SHELDRIOK.
F. E. COLTON, A. I). SHAW.
flight, and pins pivotally connecting said lugs