US838227A - Dry-kiln. - Google Patents

Description

No. 838,227. PATBNTED DEC. 11, 1906. A.- WHITE.

- DRY KILN. APPLIUATIOH FILED MAR. 26, 19M.

2 SKEETB-sHBET 1.

@mmlM/o Urrrrnn s'rarss FATENT @FFEGEQ ARTHUR WHlT-E, @F SHEBOYGAN FALLS; WISCONSIN.

' net-trust.

Specification of Letters Patent.

Patented. Dec. 11, 1906.

Zo all whom it may concern.- I

Be it known that I, ARTHUR Wnrrn, resid ing in Sheboygan Falls, inthe county of Sheboygan and State of Wisconsin, have invented new and useful Improvements in Dry- Kilns, of which the following is a description,

had to the accompanying are a part of this specificaby the moist hot air on leaving the lumber or other material being dried is carried into contact with a condensing-surface formed by a sheet-metal roof and after having the moisture abstracted therefrom by condensation is returned to the heating a para'tus to again pass around the materia being operated upon.

Another object of this invention is to provide such a dry-kiln withmeans for adjustably limiting the air-passe es so that the air circulation may be contro led and to enable.

the air bein confined within the drying chamber wit out circulation at the beginning of the drying operation, whereby the material operated-upon may be thoroughly lation is established the drying operation will take place throu hout the material instead of at the surface on y.

Another object of this invention is to provide means for artificially cooling the condensing-shrfa'ce formed'by the roof during warm Weather.

Another object of this invention is to imroveu on details of construction of a dry- -ln of t stype, to render it more efficient in its 0 eration.

With the above and other ob ects in view the invention consists in the d -k1lI1 herein claimed, its parts and combinations of parts, and all equivalents.

Referring to the accompanying drawings,

in which like characters of reference mdi: cate the same partslin both views, Figure 1 is a transverse sectional view of a dry-kiln constructed in accordance with this invention; and Fig. 2 is a longitudinal. sectional view thereof, taken on the plane 0t line 2 2 of Fig. .1, the line 11 of Fig. .2 indicatingthe sectional planes of Fig. 1.

In the draw1ngs,'5 represents the upright at later on when circuwalls, preferably of cement construction, I

which mclose the substantially rectangular drying-chamber, which is sealed at the bottorn by a cement flooringv 6 to prevent the waste of energy in drawing moisture from the oundbeneath and which is covered by an inclined roof 7, of thin sheet metal, to form a condensin -surface, as will be later eX-.- plained. lhe sheet-metal roofing is sup. ported by a network of T-rails 8, whichjexe tend longitudinally and transversely of the drying-chamberwith their flanges interlocking, and at intervals the sheet-metal coverin forms upstandin ridges by being clampe u on the upward -extending flanges of para lel T-rails 9, resting upon this network and gxtending longitudinally of the drying-chamer. -At the frontend of the drying-chamber is located a door 10, which controls the only opening to the interior, and through the doorway a pair of trucks 11, containin lune.- ber 12 or other material to be drie ,may enter on tracks 13, which are supported some. distance above the floor on cement pillars 14., In the spaces between the illars 14 and beneath the trucks are locate series of heatingcoils 15, supplied with steam by steam-pipes 16, which extend transversely through the drying-chamber, so as to be common to other drying-chambers arrangedalongside of the one shown'in event of the construction being in multiple, as is usual. 4

Somedistance below the roof 8 and parallel with it extends an I-beam 17 down the middleof the dr ing-chamber and directly above the space etween the "two trucks of lumber. This I-beam is supported at its ends upon ledges 18, which roject inwardly from the front and rear wal s of the drying-v chamber and extend from side to side thereof. Crossbeams 19 connect with the I- beam 17 and extend from one side of the drying-chamber to the other. A sheetmetal partition-plate 20 is located along'each side wall of the dryin -chamber at a short distance therefrom to orm a return-passage "therebetween and, extends from the front wall to the rear wall of the drying-chamber and from brackets 21 a short dlstance above the floor and below the heating-coils 15 to the level .of the I-beam 17. At the upper end of each partition is an inclined cover. member 22, which extends over the truck of lumber on that side of the drying-chamber to near the I-beam, being bent to form a rear wall and terminating in a trap or water seal 24c The I beam 17 is providedwith a-sheetmetal cap 25, which extends along it from end'to end,-withithe edges outstretched towald the overhanging covers 22. To these 1 edgesiare h'inged'curved flaps 26, which are adapted to overlap the edge of the covers22 fiaps 27 arehinged to the side walls of the.

aadare capable'rof swinging to increase or diminish the spaces between them and the es of the covers. 22. Similarly-arranged dryingechamher tooverlap the outer-edges ofithe covers 22,-.and theymay also swing to" vary the spaces between 1 them and the covers. Amokohaft 28 extends across the drying'echamher beneath the I-beam 17, with its ends passing through the partition-plates .20

joumaled in the sidewalls of the dryingehamber, and arms 29 extend upwardly and torwardly therefrom, with rollers I on their ends to ride upon the hinged flaps 26 and 27. 2A craldoarm $0is connected with the rockshaft28' at its middle portion and is pivotally conneetedto' ahandle-rod 31, passin thr h'enopeningina standard-32, whic isrigidi supported from thefioorythehander ed to e go the standard and hold the rock-s aft ina ts'uarious adjustments. By pulling forwardly on the handiesrod '31 the rock-shaft'iscaused to turn so as to lift the arms 29,-and they in turn swing the flaps 26 and -.27 up'wardly'to open the pgssages between them andthecoversg22. e'rearward movementofl-the handle-rod 31= causes the rock-shaft to swing inthe opposite'direction and allows the flaps to drop to a closed osisitionin engagement with the: edges 0 the covers 22. to close the passages.

Whenit is desired'to provide for cooling.

the sheet-metal roof 7 by: artificialmeans, a

- series of spray-pipes 33. are supported above the roof and are supplied with cold water under pressure from: aipipe -34, the waterbeingrayod "through perforations of the spray; es over'the entirc'surface of the roof, thus cooling the thinsheetmetal formingthe condensing surface and facilitating the condensing operation. Besidesthe cooling effoctproducedby bringingcool water in contact with the sheet metal of the condensingsurface evaporation of moisture on the roof 'will'act toincrease the cooling effect and materially-assist in the condensation.

In operation a pair of trucks of lumber or other material to be dried are runvinto thev kllnthrou'gh the 0 en doors 10 and u n the rails 13, the hands-rod 30 is push to the rear, so" as to close all of the passages coneingprov-ided with teeth on its un- 1 eases"? trolled by flaps 26 and 27, the doors are closed tightly, and the spaces between the doors and rails are filled inv in any desirable manner, so as to tightly seal the entire drying-chamber, Now steam is ,admitted to the heating-coils 15 and the drying-chamber is he t at a high temperature for a sufficient l'engt of time to enable the lumber orother material becoming heated throughout, and during this heating operation there is no circulation of air, so. that the air within the drying-chtmberremainsmoist and there is no surface-drying of the material produced. If circulationshould be allowed at the'start, it would tend to dr out'and contract the pores of the-surface e thewood before the inner portion had become suficiently warm-to expel its moisture; but by preventing the circulation and keeping the air "around the wood moist the surfaceores are ke t open, so that as the heart 0- the wood ecomes heated its moisture-maybe freely expelled. This condition'of the apparatus is mainv the roof. The alr. being warm will rise to the surface of the sheet-metal-roof7,--which is kept cool by the outer atmosphere or by the artificial cooling means, so that the moisture of the air will become condensed and will drop to the trough-shaped covers 22 orto the other parts, whichare all so shaped as to constitute troughs leading to the gutter in the rear ledge 18 whereby the Water of c ondensa tion is all collected in {said gutter and discharged through the-rear wall. After the air has become dry in this mannerit asses down through the openings 1 beneat the flaps 27 and into the return-passages formed between the partition-plates 20'andthe side Walls to the spaces beneath the-heating-coils 15, where it 1s reheated to pass up through the lumber again and abstract'moremoisture therefrom and continue this cycle of operation until the end of the drying process,

all moisture'taken from the wood con-i densed and discharged from the kiln-1n the manner set forth. v

Obviously the ad-ustments of the flaps 6 may be accomplishe in any otherdesirab manner without departing from the spirit and scopeof this invention. 'Likjewise other details ofconstruction may bra-modified or departed-from without aflecting the inven tion.

By reheating the same air over and over again and condensing the moisture therefrom the dryin operation is made much more economical than when the moist air is discharged directly to the atmosphere and fresh air taken in from the outside is required to be brought from the atmospheric temperature to the drying temperature.

That I claim as my invention is 1. In a dry-kiln, a drying-chamber, a roof covering the drying-chamber comprising a network of T-rails extendin across each other with their flanges interlocked, and a sheet-metal covering supported by the framework, there being passage-ways lead-,

ing to and from the roof through which the moisture-laden air from the drying-chamber may pass to produce condensation of the moisture.

2. In a dry-kiln, a drying-chamber, a roof covering the drying-chamber comprising a net-work of T-rails extending across each other with their flanges interlocked, a series of parallel T-rails supported by the network,-

her, a roof forming a condensing-surface, a

cover between the drying-chamber and the roof with a condensing-space above it, a return-passage leading from the condensingspace to the drying-chamber, means for controlling communication between the dryingehamber and the condensing-space and between the condensing-space and the returnpassage, and mechanism for operating the controlling means.

5. In a dry-kiln, walls containing a dryingchamber, a partition between one of the walls and the drying-chamber forming a returnpassage, a cover for the drying-chamber conmeeting with the partition, a roof comprising a condensing-surface above the cover with a condensing-space therebetween, a hinged llap for closing connnunic'ation between the drying-chamber and the condensing-space, a hinged flap for controlling communication between the condensing-space and the returnpassage, and means'for moving the flaps.

6. In a dry-kiln, walls inclosing a drying-' chamber, partitions spaced from opposite walls to form return-passages therebetween, covers for the drying-chamber connecting with the partitions and terminating at a distance from each other, a support extending between the covers, flaps hinged thereto and adapted to close the space between the cov' ers,rhinged flaps adapted to close the returnpassages, a roof constituting a condensingsurface above the covers, and means for moving the flaps.

7. In a dry-kiln, walls inclosing a dryingchamber, partitions spaced from opposite side walls to form return-passages, inclined covers for the drying-chamber connecting with the partitions and terminating at a distance from each other, ledges on the front and rear walls at different elevations, a beam supported on the ledges and lying in the space between the edges of the covers, hinged flaps carried by the beam and adapted to close the space between the covers, hinged flaps adapted to close the return-passages, a roof forming a condensing-surface above the covers, a rock-shaft journaled across the dr ing-chamber, means carried by the roc shaft and bearing on the flaps, a crank-arm connected with the rock-shaft, a handle-rod connected with the crank-rod, a support for the handle-rod, and teeth carried by the handle-rod for locking the. rod in its adjustments by engaging the support whereby the flaps maybe held more or less open for the circulation of air for condensation.

s. In a dry-kiln, walls inelosing a dryingchamber, partitions spaced from opposite side walls to form return-passages, inclined covers for the drying-chamber connecting with the partitions and terminating at a distance from each other, ledges on the front and rear walls at different elevations, a beam supported on the ledges and lying in the space between the edges of the covers, hinged flaps carried by the beam and adapted to close the space between the covers, hinged flaps adapted to close the return-passages, said covers and fla s being curved to form troughs leading to t e ledge on the rear wall, said ledge being provided with a gutter and spout to discharge water of condensation through the wall, a roof forminga eondensingsurface above the covers, a rock-shaft journaled across theidrying-chamber, arms carried by the rock-shaft and bearing on the flaps, and means for turning the rock-shaft to open and close the flaps for controlling the circulation of a r for condensation. I

In testimony whereof I afiix my signature in presence of two witnesses.

ARTHUR WHITE. Witnesses R. S. C. CA DWELL,

ANNA F. SOHMIDTBAUER.

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