US596212A

US596212A - Dry-kiln

Info

Publication number: US596212A
Authority: US
Publication date: 1897-12-28
Anticipated expiration: 1914-12-28

Description

(No Model.) 2' SheetsSheet 1."

P. KIRK.

DRY KILN.

No. 596,212. Patented 1366.28, 1897.

Invenfar F rank [in Kirk Witnesses:

2 Shets-$he6t 2. P. KIRK.

DRY KILN.

(No Model.)

Patented Dec. 28,1897.

w; n m e .n f I M/ I I I r I,

- F m 4 F" UNITED STATES FRANKLIN KIRK, OF KANSAS CITY, MISSOURI.

DRY-KILN.

SPECIFICATION forming part of Letters Patent No. 596,212, dated December 28, 1897.

Application filed August 5 1896.

To all whom it may concern:

Be it known that I, FRANKLIN KIRK, of Kansas City, Jackson county, Missouri, have invented certain new and useful Improvements in Dry-Kilns, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to dry-kilns, and more particularly to kilns for drying lumber, &c. and the object of the invention is to produce a kiln of this character which is simple, durable, and comparatively inexpensive of construction.

The invention consists in certain novel and peculiar features of construction and combinations of parts, which will be hereinafter described and claimed.

In order that the. invention may be fully understood, reference is to be had to the said accompanying drawings, in which Figure 1 represents a perspective view of a kiln partly broken away to show its inte rior construction. Fig. 2 represents on an enlarged scale a View of one of the heaters and its connecting-pipes, said heater being shown partly in elevation and partly in section. Fig. 3 represents a horizontal section of the same, the pipes being omitted. Fig. 4 represents a cross-section of one of the tracksupporting pipes. Fig. 5 represents a sectional view which shows the trap for catching the condensation of the steam.

Referring to the drawings in detail, 1 (168-, ignates a kiln of air-tight constructiomand 2 designates two or more series of vertical pipes which are fitted down upon the standplates 3, spiked or otherwise rigidly secured to the cross-timbers 4 at the base of the structure.

5 designates iron cross bars which are mounted upon the upper ends of the pipes or

tubular standards

2, and 6 designates longitudinally-extending rails which are mounted upon said bars 5 and extend longitudinally of the kiln. Said track-rails are arranged vertically over the pipes or tubular standards 2, and at such points plates 7 rest upon the flanges of said rails. Said plates are provided with apertures 8, which register with apertures 9 in the cross-bars 5 below, and extending through said apertures are bolts 10,

Serial No. 601,782. (No model.)

engaged at their upper ends by clamping-nuts 11 and having their hook-shaped or curved lower ends 12 engaging openings 13 at opposite points of the pipes or tubular standards 2, as shown clearlyin Fig. 4. These rails in the customary manner will in practice incline downward from one end of the kiln to the other, so that the trucks 14, upon which the timbers or boards 15 are builded, may be easily disposed in the required position. Such inclination is not shown in the accompanying drawings. Arranged transversely and at suitable distances apart within the kiln and below said tracks are a number of heaters, consisting of steam heads or chambers 16 and the connecting-tubes 17. These heaters, though not so shown, will in practice be arranged at a slight inclination, so that their drainage may be perfect, and at their upper ends inlet valve-controlled steampipes 18 communicate with steam heads or chambers, and said pipes are coupled to the supply-pipe 19,which may be connected to the steam-dome of a boiler or any other suitable source of steam-supply. The opposite end or head of each heater is connected, by means of an escape-pipe 20, with the drain-pipe 21.

Thus it will be seen that by continuous circulation of steam through the heaters and various pipes the temperature is raised to a very high degree,which may be regulated,of course, at pleasure in order that the moisture may be quickly driven from the lumber 15. In order to carry off this moisture or vapor, I provide a forced circulation of air and employ a system of metal pipes arranged as follows:

22 designates a pipe which is arranged externally of the kiln at a suitable point. Said pipe connects atone end with a rotary-fan casing 22 within which is mounted an ordinary fan upon the shaft 23, andsaid fan is driven by means of a belt connected to any suitable counter-shaft or other motor, (not shown,) said belt being adapted to engage the pulley 24 upon said shaft. The opposite end of the pipe 22 is coupled to the pipe 25, which extends longitudinally of the kiln and below the middle, preferably, of the heaters, and connected to and projecting inwardly from said pipe below each heater is a pipe 26, coupled at its .upper end to the transversely-extending perforated pipe 27, which is arranged adjacent or between two of the pipes or tubes 17 of the heater, as shown most clearly in Figs. 2 and 3.

Located centrally within the kiln and preferably at the apex or ridge of its roof is a longitudinally-extending perforated pipe 28, which pipe is secured by clips or other supports 29 in such position. At one end of the kiln it extends upwardly through the roof and transversely thereof, as shown at 30, and is carried down and connected to the fan-casing, as shown at 31. By this arrangement it is obvious that the rapid rotation of the fan draws the air from the interior of the kiln into the pipe 28 and discharges it continuously back into the kiln at a lower altitude, such discharge taking place from the perforated pipes 27 and impinging directly upon the heaters, as indicated in Fig. 2, thereby raising the temperature of the air and increasing its absorptive capacity.

Thus it will be seen that the heat gener ated by the steam quickly exudes moisture from the timber, and this moisture is exhausted from the interior of the kiln by means of the circulation of air established. Consequently the timber is thoroughly seasoned in a comparatively short time.

Owing to the fact that the steam pipes and heaters will be inclined, the condensation of steam drains off; but in order to carry oif the condensation from the air-pipe I employ a trap 32, which communicates with the pipe 22 through one or more apertures 33 and is provided with a drain-pipe 34. In order to reliably insure against the passage of the water past said apertures, I arrange within the pipes, just in rear of said apertures, the conical perforated deflectors 35, which are arranged, preferably, to overhang said apertures, as shown in Fig. 5. By this arrange ment the air has free passage through said pipes, as indicated by the arrows in said figure, while the flow of water is retarded in order that it may all pass through either one or the other of said apertures into the trap 32 below. By this arrangement also it is obvious that a constant and continuous circulation of dry hot air takes place throughout the kiln, and the vapor exuded from the timber escapes by way of the drain-pipe 34-.

From the above description it will be apparent that I have produced a dry-kiln which is positive and reliable in operation and in which the seasoning of the timber is facilitated.

It is to be understood, of course, that slight changes in the detail construction and arrangement of parts may be made without departing from the spirit and scope of my invention.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a dry-kiln, the combination with a suitable apparatus to heat the lumber therein, of apparatus for introducing dry air into the kiln and exhausting moistened air therefrom, comprising a fan-blower, a pipe connected thereto and provided with a condenser, a pipe extending longitudinally and centrally of the kiln below the heating apparatus, and having perforated branch pipes arranged at the under side of and adapted to discharge upon the said heating apparatus, and a perforated pipe in the upper portion of the kiln to receive the moistened air and pass it back to the fan-blower, substantially as described.

2. In a dry-kiln, the combination of an airtight structure to receive lumber-carryiug trucks, and apparatus for introducing dry air into the kiln and exhausting moistened air therefrom, consisting of a fan-blower, a moist-air-reeeiving pipe, a pipe connecting the same with the blower and provided with perforations, a trap below and connnunicating with the pipe through said perforations, conical perforated deflectors 35, within the said pipe adjacent to said perforations, and a discharge-pipe connecting the blower with the interior of the structure.

In testimony whereof I affix my signature