US1034656A - Sand-drier. - Google Patents

Description

T. N. SMITH. SAND DRIER. APPLICATION FILED JULY '1, 1911.

Patented Aug. 6, 1912.

COLUMBIA PLANOURAPH 90'. WASHINOTPN. D. C:

TAT

FTQ.

SAND-narnia.

To all whom it may concern:

Be it known that I, THOMAS N. SMITH, a citizen of the United States, residing at Portsmouth, in the county ofNorfolk and State of Virginia, have invented a certain new and useful Sand-Drier, of which the following is a specification.

This invention relates to driers and more particularly to apparatus for drying sand.

The principal object is to provide a comparatively simple, inexpensive, and eilicientl apparatus of the character stated.

Other objects, as well as the nature, characteristic features and scope of the invention will be apparent from the following description taken in connection with the accompanying drawing, forming a part hereof, which is a sectional elevational view of a sand drier embodying my invention.

In apparatus of this character prior to my invention much of the heat generated was dissipated or wasted through the stack and radiation was relied on to effect the drying. In the present apparatus this objectionable feature is obviated and the drying is effected by direct draft as well as by radiation in consequence of which there is little or no wastage of heat. Y

Referring to the drawing, (L, represents a suitable heater; Z), represents a superstructure involving a sand-holder and a heat deflector; c, represents a stack; and d, represents a cover. The heater or furnace a, is

equipped with a suitable grate 1, an ashy pit 2, and with fuel and ash doors 3, and 4. Mounted upon the furnace is a flanged ring or annulus 5, that supports the superstructure, including the sand container, heat deiiector and stack. The sand receptacle embodies a hopper 6, that is held to place by the flanged ring 5, and a cone-like wire fabric 7, which constitutes a screen for the sand and of such a mesh as to permit the sand to pass freely. The ring or annulus 5, is perforated as at 8, to permit the falling sand to pass into a chute 9, and a valve 10, is provided to close said perforations when desired, for example, when the fire is started in order to prevent a back draft.

The heat deflector 11, is interposed between the heater and stack and with its top or crown 12, tends to throw the heat outwardly against the hopper 6, and the sand screen. Said deflector is preferably a hollow cone-like casting, the part 11, constitut- Specicaton of Letters Patent.

Application filed J'uly 7, 1911.

Patented Aug. 6, 1912. serial No. 627,246.

ing a hopper and having a discharge chute 13, the major portion of which is in the hot air chamber of the heater. The part 11, is secured against displacement by suitable bridges 14, which are seated on the ring or annulus 5. The top or crown 12, is superposed in spaced relation with respect to the element 11, by means of ribs or bridges 15, of diii'erent lengths that are notched so as to engage the ledge of deflecto-r element 1l. By this construction and arrangement openings 16, are established through which some of the sand falls into the receptacle-like element 11, from whence it is conveyed by the chute 13, to a suitable point of recovery. In other words, the element 11, is not only a heat distributer or deflector, but also an auxiliary sand discharge.

Certain of the ribs or bridges 15, are con tinued to near the top of the sand hopper 6, and they constitute supports for the screen 7, and also act with their associates as distance-pieces for defining the hot air passage around the deflector to the stack. They also support the base section 17, of the stack. This part 17, may bea casting and has a iiange 18, that engages the supporting bridges and holds the screen in position.

The cover d, is cone-shape and is arranged to take into the sand hopper. It has a sleeve 19, which slides on the stack and is sustained and adjusted by means of a cable 20, running over pulleys 2l, and secured for example by a cleat 22. Access is had to the sand hopper for cleaning purposes through the medium of a door 23. Vhen the sand hopper is of especially large size, the standards 24, are provided as a further means of support.

In the practice of the invention, the valve 10, is moved to closed position when the fire is first started so as to avoid a back draft. As soon as the fire has gained suiiicient headway, the valve is opened to permit the falling dry sand to pass into the chute 9. The space between the heat deflector or elementll, and the screen and hopper is directly connected with the hot air chamber 25, and constitutes a dome-like hot air zone through which the sand must travel before reaching the chutes or outlets 9 and 13. Obviously, therefore, the sand is not only dried by radiation of heat from the shell and deflector but also by subjection to a hot blast. Consequently there isvery little, if any, dissipation -or wastage of heat energy.

sion of sparks.

The hopper element 11, of t-he heat deflector may be independent of its chute 13, for 4 facility in assembling the parts. Thisproyision is clearly illustrated in the drawing in which the neck of the chute and t-he throat of the hopper have interlocking comart to which the invention relates that modiications may be made in details without departing from the spirit and scope'of the invention. Hence the same is not limited other than required by the state of the prior E 5 nulus.

art,

I-Iaving described the nature and objects of the invention, I claim 1. A sand drier embodying a heater, a`

sand-holder equipped with a screen and with a cover, a heat distributer intermediate said heater and holder, a valved main sand discharge outlet, and an auxiliary sand discharge outlet for the heat distributer.

Q. A sand drier embodying a heater and its complemental stack, a sand -holder e uipped with a screen, a heat deflector or` distributer above the heater and cooperating with the sand-holder to form a dome-like hot air passage from the heater to the stack through which sand falls from the screen, and suitable means for discharging lthe dry sand.

3. A sand drier embodying a heater andl its complemental stack, a perforated ring or annulus carried by said heater, a sand hopper seated on said ring and having a screen feed, a cone above the heater and coperating with the hopper and screen to establish a hot air Zone through which the sand falls, a valve operatively arranged with relation to The cover d, when dropped to closed position tends to. retain the heat and also prevent the emisthe annulus, and an adjustable cover for the hopper.

4. A sand drier embodying a heater and its complemental stack, a cone intermediate the heater and stack, a hopper surrounding the cone and forming therewith a passage to the stack, and means for discharging the sand in a shower through said passage.

5. A sand drier embodying a heater and its complemental stack, a perforated hollow cone intermediate the heater and stack and having a sand discharge, a hopper surroundv ing the cone and having a cone-like screen for discharging sand upon and around the hollow cone, a perforated annulus seated upon and projecting beyond the heater and constituting the bottom of the hopper, a valve for the saine, and a sand chute operatively disposed with relation to said an- 6. The combination of a heater and its l stack, a heat deiiector intermediate the same,

a sand-holder and screen surrounding said deiieetor and forming therewith a passage to the stack, and a cover slidably mounted on the stack in operative relation with the sand-holder.

7. A sand drier embodying a heater, a sand holder in detachable relation therewith and equipped with a screen and with an adjustable cover, a heat distributer intermediate said heater and holder, a valved main sand discharge chute in operative relation with the holder, and an auxiliary sand discharge chute for the heat distributer, said chutes traversing the heater, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

'TI-IOS. N. SMITH.

Witnesses:

CHAs. B. OCONNOR, F. E. FITOHETL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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