USRE8240E - johnson - Google Patents

Description

- Y 2 SheetsSheet; 2.-

R. P. JOHNSON. Assignor, by me'sne Assignments to E. J. SUMNER.

Apparatus for Drying, Lumber.

' No.8,24 0. Reissued Ma -y 21,1878.

WITNEEEEE INVENTOR UNITED STAEES romeo QFFIQE,

RICHARD P. JOHNSON, {)F VVABASH, ASSIGFGE, BY MESE'E ASSXGNMENTEQ,

. Ti) ELI J. SUMNER, GE MGORESVELLE, HIDMNAA Specification forming part of Letters Patent No. 66,594, dated July 9, 1867 Reissue li fi ll dated May 21, 1878; application filed March i i, 1878.

forming part of this specification in which- Figure 1 represents a vertical longitudinal section of my improved apparatus for drying lmiiber, the plane of section beingiudiceted by the line a: as, Fig. 2' Fig. .2 is a horizontal sectional view of the same, the plane of sec-.

tion heing indicated by the line g 3;, Fig. 1. Fig. 3 is a. vertical erossseetion of the ozone, the pleneof section being indicated by the line 2 2, Fig. 1. Fig. 4 is a similar View on line 41: 41:, Fig. Fig.5 is esimiler View, the plane of section being indicated by the line y y, e-

Similar letters of reference indicate correspending ports.

This iureution relates to en epeemtus wherein Wood of any description, Whether split into lumber or not, may be steamed and dried, so as to be thoroughly seasoned.

It consists, first, in an apparatus for drying lumber, of a lower heetingehember, which is provided with celd-airfiuesetits froutends,aud communicates with an upper dryingeheinber, at or near the roztrof the apparatus, by an air draft, the drying-chamber being provided with it door at its front end to admit car-loads of lumber, and a, door otor near its rear end for discharging dried lumber, and an escape flue or tines at or near the front of the dryingroom, whereby lumber in its greenest etute mines into the drying chember where there is the least heat, and is gradually run back ward to the rear end of the drier, against current of hot air, to the point where the greatest heat is attained.

It further consists in a elose chamber for drying steamed lumber by passing the pro ducts of combustion through a perforated screen directly into such chamber among the lumber from a flue passing beneath the dryuse its entire length, and in providing tubes for the admission oi. eold air into said flue, whereby the hoteir current is regulated and its discharge into the drying-ch amber is equal.- ized,

It eonsists, thirdly, in dmfttubes communieating with the heeting'eheuiher, to attain a better combustion.

The floor of the building in whieh the apparates is set up is provided with rails, so that the lumber on the trucks is passed into one end of the building and steamed. Thence it is brought into the dryingeha-mber, the floor of which is inclined, so that the trucks sta'nding therein will be moved down eohometieelly as the from truek is moved out oi the dr ving room. The-lumber can thus he'lirought to market on. the some trucks enwhieh it was first loaded, having been steamed end dried without having been unloaded from the trucks.

Areoreseetse Wooden building, plooedupon suitable foundations, and provided with double side "walls E B, as shown in Figs 2, 3, and 4', for the purpose of better retaining the heat. Below one end of this building, em embedded in the ground, if desired, is a furnace, 6, built of brick or other euitehle material, having a suitable motel cover, a, that is provided withturned-up edges b b, as shown in Figs; 1 and.

4, to serve as e pen for holding waiter. One or more horizontal fines, l), made of brick or metal, are arranged below the building, and are embedded in the ground, and extend from the furnaee G to the other end ,of the building. They eonrey the products of combustion from the furnace to the opposite end of the building A, where the same enter 7 the building through the meshes of wire-net;--

ting wells E E, arranged ecross the building, so es to arrest and prevent the sparks from entering the building,

UXlOIi the finer of the building are placed one or more pairs of rails, F, extending from one end of the building to theother, as shown in Figs. 1 and 2, and even extending over the pen a o. "Water is brought into the pen a b through a. pipe, 0, which is connected with a. barrel or veeeel, i containing water.

The lumber to be dried is loaded upon' trucks H H and brought tothet end of the building A under which the furnace is exas that stands flue i), as shown in Fig. 3.

.the front part As the lumber means of slidin doors L L.

The water in "the pan is evaporated by the heat from the furnace below, and the lumber on the truck that stands above the .pan is thoroughly steamed. 1

When the steaming iscompletedthedoors L L are opened, and the trucks moved forward from the steaming-room A into the dryin g-room A. untilsaid drying-room is full.

.In the drying-room the rails are laid slightly inclined downward from theentrance, as shown in Fig. 1, so that the cars therein will move backward of their own accord. The heated air and products of combustion from the furnacc enter at chamber, and dry the lumber at that truck which is at the extreme and of the building, directly above (or nearly so) the point where heat is discharged firom the The truck nearest the but end of the kiln is then the building when the lumber thereon is suf fioieutly dried, the other tracks moved do and so on continuously. A large quantity of wood can thus be dried s0 evenly as to prevent checking by the movement of the trucks backward acontinuous current of hot air, which is hottest at the rear of the apparatus. The heat in the-drying-chamber"passes to doors L. It then passes out of the building through the chimneys M, in which dampers orregisters f are arrangedto regulate the escape of hot air.

N N are funnelshaped tubes, to conduct a suitable quantity of fresh air into ing of the air in the said fine, the draft through such fine drying-chamber to the chimneys M,

The trucks are, of course, built in such a manner that the air can the same into the lumber.

When it is ound'impra'cticable to let the trucks out of t e lower; end of the'building, and they have sides, it is, necessary to have the lower or more forward part F of the rails Fm'ounted upon trucks 0, which'arc placed upon cross-rails P, that are continued at the outside of the build- I lug, as shown in Fig. 5.,

on the lower car is dried,

passfireeiy throughstops may be'placed between said car and the one next to it, so as to prevent the line of cars iron; moving ahead when the last car is" removed. The doors R at the side of the on with, as before.- A.s mi nc me tf r amssrt nehlith trucks 0 may be used for charging the steam v the lower end of the dryingmoved out of of the same and near to the the flue Db when required, so as to prevent the overheat 3 and to regulate and through the I to be discharged through the building are then opened, and the uter -or" car Ois moved out on the track P.; The car standing on the car 0 on the outside can be taken down from the car 0, and the latter is moved back again into the building. The

.stops are then removed to let the whole row of cars H move forward again, a new car is brought into the steaming-chamber and the process of steaming and heating is then-gone inghh'amber, as shown in front thereof at Figs. 1 and 2. v By this invention green lumber maybe put into the building continuously and dry lumber removed therefrom continuously without slacking the fire or delaying the drying of the lumber that remains in the kiln.

I disclaim any novelty as to the combina tion of the steaming-chamber with a hatingchamber, as such has been used prior to this invention. I

I claim, and desire to secure by Letters Patent, as new- I l As animprovement in apparatus for drying lumber, a lowerheating-chamber,-D, and au upper drying-chamber, A, the two chambers having a communicating hotair draft at or near the rear of the apparatus, the dryingchamberhaying a door at the front end thereof. .fonadmitting car-loads of lumbenfandtlle heating-chamber having a cold-air draft at the front of the apparatus, and a door atlcr near the rear of the apparatus-for the exit of the car-loads of lumber when dried, and with escape-fines at-or near the front fend'of the drying-chamber, whereby the moving-current of air is hottest at the rear of the apparatus, and passes from thence to thc'escape-flues, and the lumber on the cars in its greenest state-- comes into the drying-chamber where theheat is least and passes backward, and is gradually dried by being moved againstjthe current "of hot air to the point where the latter is hottest. I 2. The combination and arrangement of the furnace 0, flue D, and perforated plates E, by

whichlth'e products of combustion are discharged into the chamber A among thellumher, being driven through such chamber and discharged through the chimucysM,;a-s herein described, for the purpose specified. 3. Thetubes Eirrangcidifirelationwith the flue D,whereby the draft through the charm ber A is regulated, as herein set forth, for the purpose specified.

' RICHARD P. JOHNSON.

Witnesses: E. J. SUMNER,

G. L. Gnsrnv.

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