US 2028479 A
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CONVEYER EOR HEAT TREATING FURNACES Filed lAug. 5, 1931 3 Sheets-Sheet 1 Y |,NvENToR` Clarence Win/rea Spicer ATTORNEY` jm. 2E, i9@ f c. w. sPxcER @02,479
CONVEYER FOR HEAT TREA''ING FURNACES Fned Aug. 5. i931A -3 sheets-sheet 2 I r/0 a 0 /0 n f' red Spicer Jan- 21, 1935 c. W. sP'ncE'R 2,4?
CONVEYER FOR HEAT TREATING FURNACES Filed Aug. 5. 1931 3 Sheets-Sheet 5 INVENTOR Clarence Winfred jpiccr B 1 'i l 5, ture .truien is iight Patented Jan. Z1, 1936 i?" per.
CONVYR Fon HEAT 'iit'rING Y FURNACES j Clarence Wlnfred Spicer, Toledo, Ohio 3 Claims.
, Mynvention relates to `flexible metal belts especially that type which is used Lfor the conveyf ingof bodies to beheat treated through a furnaceand has for itsobject to provide a struol in weight with a maximum yoff strength. Asfurther vobject is to -provide a link of design which will prolong the life of the belt. beltsho'f4 this character heretofore used, the mass of metal in the belt was a great disadvanH io tage because it required an immense amount of Y heat todheat the belt beforel the varticles to be heat treated could be brought up to the required temperature and when attempts have been made to reduce the mass in the belt, weaknesses have 15 developed causing failure in the belt. In my inn v vention I provide a construction in which the maximum strength of the metal is utilized.
The foregoing and other features of my inven tion will now be described in connection with the accompanying drawings forming part of this spec-- ication in which I have represented my traveling belt in its preferred form after which I shall point out more particularly in the claims those features which I believe to be new and of my own i invention.
In the dra\vings:-Figure l is a diagrammatic assembly in part section of my conveyer as embodied in a heat treating furnace.
Figure 2 is a plan view of a series of links in a :lo belt of one oi my preferred designs.
Figure 3 is a side view of same.
Figure 4 is a modification of link arrangement to present a belt that provides full area for small work.
:l5 Figure 5 is a modification of link presenting a smooth belt on both sides and therefore reversible tot distribute wear.
Figure 6 is a side View Y0i link shown in Figure 5.
Figure 7 shows a series of blanks which could be cut singly or in multiple from a strip before forming and welding with weld at end of link as shown in Figure 6'. t
Figure 8 shows a series of blanks as shown in 45 Figure '7, the weld vbeing in middle of the link as shown in Figure 5.
Figure 9 shows how belts now in use fail because of slight wear at the eyes.
Figure I0 shows a chain made of links ccn- 50 structedout of seamless or welded tubing.
Figure 11 is a side elevation of structure shown in Figure 10. Y
Figure l2 is an end view of construction similar to Figure but with the ends of the tubes turned up to form guards at the edges of the belt.
' the link shown in Figure (Ci. 19a- 193) Figure i3 is a side elevation of structure shown in Figure l2. A, L .L-
:Infcarrying-` out my, invention as illustrated in Figures l to, myendless belt comprises a. plurality of links mand ii made preferablyfrom a suitable heat resisting metal ribbon, linked4 toe gether upon a plurality of pintles l. This belt passes over two drums vor sprockets 'Cfiiend usuf ally drags on a supporting table te positioned in a heat treating furnace lll. The links comprjsing my belt as illustrated. inFigures to `t are made of sheet metal having heat-resistant characteristics and of substantially flat cross section formed at each end with eyes for engaging the pintles 2G formed by bending the material over on itself.
In the construction shown in Figures 2 and 3, the ends are bent so that they over-lap each other and are secured to the center of the link by rivet-- ing or by Welding if desired as shown at l2. It will be observed that this link presents a fiat side i3 which is substantially straight and this side is designed to drag on the table it whereby a max-- imum surface is exposed which gives longer life. End links may be formed, if desired, with a side flange which is bent up to form a rail as shown at l5.
In links illustrated in Figures 5, 6, 7, and 8 it will be observed that the ends of the blank do not over-lap but are butt welded after the preferred method of making welded tubing. In link shown in Figure 6 the weld is at 59. The blanks for this type of link are shown in Figure 7, while 5 the weld is at Sil. Blanks for this modification are shown in Fig ure 8.
I may, vdesire to form my links from seamless or Welded tubing as shown in Figures l0, 1l, l2, and I3. In that case the tubing may be the full Width or any. part of the belt and formed either oval or round and then flattened. The tubing 8l] is provided with openings iii which are out out of the tubing either before forming and Welding into tubing or can be cut out from the tube after welding. The tube is then attened and assen bled on pintles 2l! as shown in Figure ll. Should it be desirable to have a guard 85 on the edge of the belt the ends of the tubing may be turned up as shown in Figures 12 and 13. This guard may serve both to retain the work on the top of the i' belt and as a guide co-actingwith table 40 or other part of the device to keep the belt running in the desired position.
YIn belts of this character andwith ordinary shape of 1ink as shown in Figure 9, wear is rapid because theeyes present at rst only a line contact with the table which rapidly Wears through as shown at 1U causing the belt to fail.
It will be obvious that a belt made of links after the design shown in Figures 1, 2, 3, and 4 uses less material than usual designs and presents a smooth belt surface on one side which gives a .maximum of Wear for non-reversible belts and that a belt made of links after any of the designs shown in Figures 5, 6, 10, 11 and 12 uses the least possible material for a belt having also the advantages of smooth surface on both sides and reversibility.
With my construction I not only provide a link With maximum surface Contact with table but a belt that can be reversed thus greatly increasing the life of the belt.
It will be observed that with this construction the links are threaded on the pintles in a continuous line which provides a maximum of bearing surface.
I Wish it distinctly understood that my flexible metal belt herein illustrated and described is in the form in which I desire to construct it but that changes or variations may be made as may be convenient or desirable Without departing from the salient features of my invention and I therefore intend the following claims to cover such modifications as naturally fall Within the lines of invention.
l. In combination with a heat treating furnace, a table; a conveyer to pass over said table Y comprising a series of links of heat resistant ma- Y terial of substantially flat cross-section; and eyes formed in the ends of said links by bending portions of the material into contact with one another to form a substantially flat surface arranged to expose a maximum Wear area to said table, said portions of the material being secured by Welding.
2. In combination with a heat treating furnace, a. table; a conveyer to pass over said table comprising a series of links of heat resistant material of Substantially at cross section having portions thereof bent to form eyes at the ends of said links, Contact between said portions being made at one of said eyes whereby substantially at surfaces are formed on the faces of said links to expose a maximum wear area to said table, said flat surfaces being free from joints or connesting means.
3. In combination with a heat treating furnace, a table; a conveyer passing over said table comprising a series of links of heat resistant mate-v rial of substantially flat cross section having portions thereof bent to form eyes at the ends of said links, the remaining portions forming substantially flat surfaces on the faces of said links to expose a maximum Wear area to said table, said ilat surfaces being free from joints or connecting means.
CLARENCE WIN FRED SPICER.