US177384A - Improvement in sand-driers - Google Patents

Description

'pipes b bf, as shown.

UNITED STATES PATENT EEToEa CASPER P. DULL, OF MGVYTOWN, PENNSYLVANIA.

IMPROVEMENT IN ,SAND-DRIERS.

Specification forming partpof Letters Patent No. 177,384, dated May 16, 1876; application iled September 4, 1875.

To all whom it may concern:

Be it known that I, GAsPER P. DULL, of McVeytown, in the county of Mifin and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Drying Sand; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing' making part of this specification, in Which- Figure 1 is a top view of my improved sand-drier, the sides being in section to show the arrangement of the pipes. Fig. 2 is a sectional view of right and left hand threaded quarter-turn.

Like letters of reference indicate like part-s.

My invention relates to apparatus for drynecting with the manifold by means of quarter-turns cut with right and left hand screwthreads, whereby the connections are effectua-lly and cheaply made. A

To enable others skilled in the art to make and use my invention I will describe its construction and operation.

In the drawing, a represents the upper steam drum or manifold, and b b pipes passing from the drum c to the.stea1ndrum o, which pipes form the bottom or grating of the chamber d for receiving the sand. These pipes I arrange parallel to each other, leaving a small space between them, through which the sand when dried will fall, and preferably connect said pipes to the drum a by vertical To the drum a I connect the steam-inlet pipe a', and to the drum c the pipe o for carrying off the waste steam and water of condensation. e e form the sides, and j' f the ends, of the chamber cl. The steam-drum a may be inclosed, as shown in the drawing, to form a hopper for feeding in the sand, whereby the sand is'caused to come first iu contact with the hottest part of the pipes. A

The operation of my improved apparatus is as follows: I place the sand-drier at a slight angle, or incline the pipes forming the bottom thereof, so that the water of condensation may run `down the pipes b b into the drum c land be removed in the usual manner. Steam is admitted through the pipe a into the drum or manifold a and passes through the series i of pipes bb into thedrum c, and thence escapes through the pipes o'. The wet sand is placed upon the pipes b b, and the heat of the steam in the pipes gradually dries the sand, which, when it is dry, falls through the spaces between the pipes and allows the wet sand to come in direct contact with the pipes before .it also passes through. It may at times be desirable to arrange the drier so that it may be rocked or agitated to facilitate the dis-v charging of the sand.

The advantages of my apparatus are: The sand is dried by a continuous process, the sand, as it dries', falling through and making room for the wet sand above. It allows the water of condensation to drain ofi' from the steam-pipes, and thus enables me to utilize the full heating-power of the steam, and as the steam is delivered by the manifold to each separate pipe ofthe series there is no liability of the pipes becoming filled by the accumulated' water of condensation.

As the water of condensationis drained byv the manifold there is no liability of the pipes bursting by freezing in Winter when the apparatus is not in use.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

The combination of the pipes b b, vertical pipes b b', and the manifolds a o, the pipes b b being connected by/Athe right and left hand threaded quarter-turns, substantially as and for the purpose specified.

In testimony whereof I, the said CASPER P. DULL, have hereunto set my hand.

C. P. DULL. Witnesses AND. REED, JOHN HAMILTON.

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