Apparatus for drying sand
US 536277 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
-(No Model. A
- A. .FORRESTER.
APPARATUS FOR DRYING SAND, 820.
No; 536,277. Patented Mar. 26, 1895.
15 Fig.8. 1
\zwxnesses PETERS cu mm'mumm msmumou, p. c.
UNITED STATES PATENT JOFFicE.
ALEXANDER FORRESTER, on BUFFALO, NEW YORK.
APPARATUS. FOR" DRYING SAND, 84C.
SPECIFICATION forming part of Letters Patent No. 536,277, dated March 26, 1895 Application filed May 7. 1894. Serial No. 510,252. (No model.)
To all whom it may concern: 7
Be it known that I, ALEXANDER FORRES- TER, a citizen of the United States,.resid ing in Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvementsin Apparatus for Drying Sand or other Materials, of which the following is a specification. .7
My invention relates to a new and improved apparatus for drying sand, cements, clay or other materials that require the evaporation of the water therefrom, and it will be fully and clearly hereinafterdescribedand claimed, reference being had to the accompanying drawings, in which- Y p v Figure 1 is a front elevation of the apparatus complete. Fig. 2 represents a plan or top view, showing the conveyors and their operating mechanism. Fig. 3 isa transverse section on or, about line a a, Fig. 2, showing the form of the several channels through which the sand, or other material to be dried passes, also an end View of the conveyers. Fig. 4 represents an end view of a channeled receptacle in which the conveyers operate. Fig. 5. is a detached faceview of one of the conveyer blades. Fig. 6 is a sectional elevation, cutting longitudinally through two sections of the channeled receptacle, showing how the two sections are secured together. Fig. 7, represents a top or edge view of the conveyer blade shown in Fig. 5. Fig. 8 is a transverse section through a slight modification of the channeled receptacle, showing the inclined opening from the first channel to the second; showing also, an end view of the device for throwing the sand'over from the first into the second channel. Fig. 9, represents a side elevation of Fig. 8, showing the modified construction by which the receptacles are arranged transversely instead of longitudinally.
Referring to'the. drawings in detail, Lrepresents a brick structure in which the drying apparatus is located.
2 is the chimney which is made in the usual way and is placed preferably at the rear of the structure orfurnace.
of the flanges 10-10 '6) and bolts 11, the flange 10", lapping over At the rear end of the furnace 1, is an outlet opening 6, see Figs. 1 and 2, and its interior may be lined with fire brick. On each outer side of the furnace is a series of strengthening iron braces 7 and 7% connected by transverse connecting bars 7 8 represents the furnace doors, and 9, the doors com municatin g with the ash receptacle. The furnace is provided with a series of the usual grate-bars 8, arranged transversely.
The channeled receptacle through which the sand is conveyed, is preferably constructed of cast iron, and is made up in sections which are connected together by means and 10, (see Figs. 3 and the under edges of the flange 10, as shown in said Fig. 6. Between these two flanges 10 and 10, is placed a packing of asbestos 13, (shown in said Fig. 6) to insure a tight joint. This receptacle is provided with a series of channels 14, 14 and 14, showing in this instance, three of such channels, but there may be more or less than the number shown, the object being to have the sand conveyed through heated channels a sufficient distance to cause it to become perfectly dry before it leaves the receptacle. At the rear end of the channel 14, is an opening 15,(s'ee Figs. 2 and 8,) having an inclined passage way 15, down which the sand passes into the channel 14:. At the opposite end of the channel 1 B, is another similar opening 15*, and an inclined passage way 15, shown in Fig. 2 which communicates with the channel 14 At the rear end of the channel 14 is an outlet spout 16. On each side of the channeled receptacle is a laterally extending flange 16, having a downwardly projecting narrow flange 16. The flanges 16% rest upon the metal balls 5, so that the channeled receptacle can rest upon an easily movable supportwhile being expanded by heat or contracting while cooling.
The conveyors arecomposed of a series of single blades 17, each being provided with a square eye"17, in the hub, so thatit can he slipped on to the square shaft 17*, (see Fig. 7) but any other. form of shaft in cross section will answer provided it is adapted to prevent The object in thus making these conveyors up of a series of single blades, is that when one becomes worn or broken, it can be easily removed and a new one substituted therefor. These shafts 17, extend the whole length of the channeled receptacle and from that out each way beyond the same, they are turned round, and extend through the brick wall and are mounted in boxes 18, so as to turn therein. There are three of these shafts, as shown in the drawings, and they are provided with gear wheels 19-19 and 19, which gear in with each other. The central shaft or the one having the gear wheel 19, is provided with a bevel gear wheel 20, and on the driving shaft 21, bevel gear wheel 22, adapted to gear in with the gear wheel 20.
At the end of the conveyor blades, in the channel 14, is a series of fiat blades 23, the object of which is to take and throw the sand, as it moves in the direction of the arrow V, Fig. 2, over on the incline 15, from which it flows into the next channel 14, where the movement of the conveyer being reversed, the sand moves in the direction of the arrow W, and is carried back toward the front where the conveyer in the channel 14 is provided with a similar fiat bladed device 23, which throws the sand through the side opening 15", and down the incline 15, into the channel 14, from which the conveyer in said channel carries it to the rear and to the outlet spout 16.
The sand dried in this apparatus is used in the preparation of hard wall plaster and it is very important that the sand during the process of drying be kept perfectly free from smoke or dirt of any kind, as the least quantity of smoke or soot in the sand will discolor and injure the plaster or cement made from it. Consequently, the channeled receptacle is made tight so that no smoke from the furnace can come through it.
Sometimes, in a large apparatus for instance, it is advisable to arrange the channeled receptacle transversely, in which case the flanges 16, should be put at each end of the channeled receptacle, substantially as shown in Fig. 9. This construction is preferable for the reason that they are shorter and not so liable to spring in the center.
In the modified construction shown in Fig. 8, the channeled portions are made separate and secured together at the top by bolts 24, and arranged transversely. In some respects this construction is preferable because it brings the bolts above the fire and consequently, away from the influence of the heat.
The operation of the invention will be easily understood from the foregoing description and drawings. Fire being started in the furnace until the apparatus becomes sufficiently heated, the sand to be dried is thrown into the channel 14, at or about the point, B, see Fig. 2. The conveyer carries it to the opening 15, when it passes into the channel 14:, and is carried by the conveyor back again in an opposite direction until it reaches the opening 15, when it is thrown into the channel 14" when the conveyer carries it back to the foot of the apparatus and to the outlet, when it is deposited in a suitable receptacle.
I claim as my invention- In an apparatus for drying sand or other material, the combination with a suitable furnace provided with a series of channeled receptacles having openings at alternate ends communicating with each other, of a series of conveyers located in said receptacles, each consisting of a series of removable single blades mounted on operating shafts, means for preventing them from turning on said shafts and gearing substantially as above described for connecting said shafts with the driving shaft, substantially as and for the purposes described.
JAMES SANGSTER, HARRIET JOHNSON.