US1859760A - Heating furnace - Google Patents

Description

May 24, 1932. J. F. BEANS HEATING FURNACE Milled July 13, 1928 J. F. BEANS May 24, 1932.

HEATING FURNAGE 3 Sheets-Sheet Filed July 13, 1928 @wom/Lio@ MMM MINIMUM -JFea/Lr atroz my May 24, 1932. 1 FY BEANS 1,859,760

Filed July 15, 1928 :5 Sheets-'Sheet 5 A 3mm/toc l JFeq/U attozmq [WWW IHWMH UlWlU FHNW WMM W u.. b. [oil ...mi |\||I\.|. nu wh. w l n y. NMwllmm. WHILIIHI M \||||\l WIW. h. Mullll ivi-ew of the furnace taken Patented May 24, 1932 JOHN r. BEANS, or MAssILLoN, onro HEATING FURNAC Application lcd Jlily 13, 1928. Serial No. 292,534.

The invention relates to furnaces for heating, heat treating, or annealing metal articles and more particularly to a furnace especially adapted for the treatment of the leaves ofv automobile springs and the like.

The obj ect of the improvement isto provide a furnace for the continuous heat treatment of such articles; tov provide an arrangement of burners, furnace Walls and flues designed to obtain the best results; and to providean improved continuous chain conveyer for carrying the spring leaves or the like of various lengths continuously through the furnace. The above and other objects may be attained by constructing the furnace in the manner illustrated in the accompanying drawings, in which Figure l is a plan sectional view of the improved furnace taken substantially on the line 1 1, Fig. 2;

Fig. 2,. a vertical longitudinal sectional substantially on the line 2 2, Fig. 1;

Fig. 3, an end sectional view through the furnace taken substantially on the line 3--3, Fig. 1;

Fig. 4., an enlarged detail perspective view of one of the chain attachments, showing the T-shaped material supporting plate carried thereby;

Fig. 5, an enlarged fragmentary plan sectional view of a portion of the conveyer chain and Fig. 6, a side elevation thereof.

Similar numerals refer to similar parts throughout the drawings.

The furnace may comprise the side walls 1 and 1a, end walls 2 and roof 3, built of suittition wall or hearth 4 extends longitudinally through the furnace and is provided, at spaced intervals, 'with the longitudinal slots 5 for a purpose to be hereinafter described.

The furnace is thus divided by this horizontal chamber 6 and the lower chamber 7 which is maintained at a considerably cooler temperature, the ends 8 thereof being preferably open to the outside atmosphere. Y

The roof 3 is preferably arched and inpartition'wall into the upper heating clined downward from the side wall 1a to the side wall 1, as best illustrated in Fig. 3. Upwardly inclined, inwardly flared openings 9 are provided at intervals in the side wall 1a for the reception of the upwardly inclined burners 10, by means of which fluid fuel may be admitted to the combustion chamber for maintaining the same at the necessary temperature.

It will be noted that these burners are located near the arched roof and directed towa rd the highest portion thereof whereby the flames and gases of combustion will be caused to swirl downward along the inclined roof and back over the horizontal partition wall l, discharging through the openings 10 in the side wall la, at the lower portion of the combustion chamber.

These discharge openings 11 communicate, by means of the horizontal passages 11a, through the side wall 1a, with the lues 12. Y

The longitudinal slots 5 the horizontal partition wall 4 may be widened below the top of said Wall as indicated at 13. Mounted within the widened portions of these slots are longitudinal channel bars 14 supported Aas-by the longitudinal and transverse I-bealns 15 and 1.6 respectively. An endless conveyer chain 17 is arranged to operateV through each of the slots 5, the upper strand of each chain being adapted to slide upon the channel bar 14. These conveyer chains operate over sprocket wheels' 1S 4and 18av located beyond the feed and discharge ends respectively of the furnace.v

The sprocket wheel-s 18 may be mounted upon a shaft 19 journaled in suitablebearp ings 2O carried as by the support brackets 21. able refractory material. A horizontal par- The sprocketv Wheels 18a may be mounted upon the drive shaft which may be journale-d in the bearings 23 carried by the support 'bracketsl 24.

A large gear 25'may be fixed upon the drive Ashaft 22 `and arranged to mesh with the pinion 26 of a gear reduction 27, whicll is driven nsby the motor 28, whereby the chains 17 are arranged to travel inv the direction of the arrows shown on the drawings.-

Each. link- 29 of each of the sprocket chains lisadapted tor/carryan attachment 30 inl the all) form of an inverted T, the head 3l thereof being connected to the link as by the bolts 82.

The upper end of each of these attachments is preferably provided with a socket or slot 33 open at one side as at 34 and disposed in parallel relation to the direction of travel of the conveyer for the easy insertion or removal of the shank 35 of a T-shaped material carrying plate 36, preferably formed of heat resisting alloy.

The material carrying plates 36 areb arranged to be fixed in the sockets 33 of the attachments as through the slots 5 in the horizontal partition wall or hearth 4E.

i rlhe head 3S of each of these T-shaped material carrying plates is adapted to project above the hearth and is twisted at an angle to the shank, which is disposed parallel to the direction of travel of the conveyor, and the head is of such length that the ends thereof overlap the ends of adjacent T-plates as best illustrated in Figs. 5 and 6 of the drawings.

lVith this construction of conveyer, it will be seen that the spring leaves may be laid transversely across the conveyer chai-ns at any point thereof without danger of the spring leaves dropping down between the material carrying plates of the chains while at the same time a flexible chain is provided which may easily pass around the sprocket wheels.

By spacing the several conveyer chains at different distances from each other, it will be seen that spring leaves of Various lengths may be accommodated by different pairs of the chains, or by all three of the chains, as is required.

As the greatest wear will be upon the T- shaped material carrying plates, which extend into the combustion chamber and are subjected to the highest temperature, it is desirable to form these plates of heat resisting alloy and to provide means whereby they may be easily removed from the attachments on the chain and quickly replaced.

The attachments and chain being located below the combustion chamber will receive the benefit of the cooling atmospheric air passing through the lower chamber 7 and need not necessarily be made of heat resisting alloy.

From the above it will be obvious that a simple and efficient heating furnace is provided, having a conveyer mechanism well adapted for continuously carrying spring leaves and the like through the furnace without danger of the material being caught in the conveyer, whereby the spring leaves may be quickly and easily fed upon the conveyer at the entrance end of the furnace and discharged therefrom at the exit end thereof.

I claim l. In a continuous furnace, a hearth provided wit-h a longitudinal slot, a conveyor by the bolts 87, and extend for carrying material through the furnace, T-shaped material carrying plates on the conveyor extending through said longitudinal slot, the shank portion of each plate being parallel to the direction of travel of the conveyor, and the head portion of each plate being twisted at an angle to the shank and overlapping the head portions of adjacent plates, and the head portion of each plate projecting above the furnace hearth.

2. In a continuous furnace, a hearth provided with a longitudinal slot, a conveyor for carrying material through the furnace, attaching members upon the conveyor provided with slots disposed in parallel relation to the direction of travel of the conveyor, T-shaped material supporting plates extending through the slot in the hearth outwardly from the conveyor at right angles thereto and having their shank portions removably disposed in the slots in the attaching members, the head portion of each plate projecting above the hearth and being twisted at an angle to the shank and overlapping the head portions of adjacent plates.

3. In a continuous furnace, a hearth provided with a longitudinal slot, a conveyor for carrying material through the furnace, material carrying plates on the conveyor extending through said longitudinal slot, each plate including an inner portion parallel to the direction of travel of and secured to the conveyor and located in the slot, and an outer material supporting portion projecting above the hearth, the outer portion of each plate being twisted at an angle to the inner portion thereof and overlapping the outer portions of adjacent plates.

In testimony that I claim the above, I have hereunto subscribed my name.

JOI-IN F. BEANS.

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