US369774A - Ezekiel - Google Patents

Description

(No Model.)

HEATING PURNAGB.

No. 369,774. Patented Slept '18', 1887.

T m m C" 3] l] 11 im \ili` M trier.,

PATENT EZEKIEL C. CONDIT, OF KANSAS CITY, MISSOURI.

HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 369,774, dated September 13, 1887.

(No model.)

T0 all whom, it muy concern:

Be it known that l, EZEKIEL C. CONDIT, of Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Furnaces,of which the following is a specilication.

rllhis invention relates to hot-air furnaces; and the invention consists in certain improvements whereby provision is made for the eX- pansion of the parts Without injury, and whereby, also, the heating capacity of the furnace can be altered at will to adapt it to the variations in the weather, as hereinafter more fully explained.

Figure l is a perspective view, partly in section. Fig. 2is afront elevation with the faceplate removed; and Fig. 3is a transverse vertical section on the line m x of Fig. 1, enlarged to more clearly show the expansion-joint, and Fig. 4, a view of a detail.

My invention relates more especially to that class of furnaces designed for heating large buildings, such as publicschool buildings, churches, and the like, and may be considered as an improvement on the furnace described in my application filed August 2l, 1886, though one feature of the invention is applicable generally to all furnaces of the kind known as the Buttan heaters.

rlhe general construction of the furnace in this case is the same as that described in my application before mentioned, the same general form of body and tubes 'being used, and differing therefrom only in the particulars hereinafter described.

In constructing` a furnace according to my present improvement l use a cast-iron body or fire-box, A, with vertical air-tubes C, the same as in my former case; but instead of dividing the body A by a longitudinal joint about midway of its height, as before, I extend the side walls of the body A down to the bottom plate, B, as shown in Figs. 1 and 2, and connect the parts A and B by a peculiarly-constructed joint to compensate for' the unequal expansion of the various parts. This expansion-joint,

A to fit against, and at its outer edge with a` depending flange or lugs to afford a bearing for and means of securing a plate, D, as shown. This plate D, I make in the form of a narrow strip of the proper length to correspond'with the other parts, and along its inner face form a laterally-proj ectingflan ge or rib, e. as shown, the width of the plate D and the location of the rib e being such that when the plate D is bolted fast to the bottom plate, B, ai shown in the several figures, there will be a considerable space left between the flange c and the upper face of the bottom plate, B. On the exterior face of the plates of the body A, along its lower edge, I form a laterally-projecting liange or rib, a, as shown in Fig. 3, so that when the parts are put together, as shown, the lower edge of the body A, with its fiange or rib c, will be inclosed in the aforesaid space,whereby the lower edge of the body A is held securely in place between the flange b and the plate D, and yet is permitted to rise or fall between them as it may be moved by the expansion or contraction ofthe tubes C, which, being located within the fire chamber and bearing at their ends against the top of the body A and the bottom plate, B, will necessarily cause a considerable movement of those parts in relation to each other. By this construction l am enabled to form an expansion-joint which securely unites the parts, prevents the sides from being thrown out of position by warping, Sto., and still permits sufficient movement ofthe body Ain relation to the bottom B to compensate for any expansion of the tubes or other parts, and also prevents any unequal strain that might occur by the unequal heating and consequent unequal expansion of the parts in case the body A and bottom B were rigidly connected by bolts or otherwise.

If it be desired to make the joint air-tight,

it may be done by inserting a strip of ashes IOO permitting this to be done without disturbing the bottom B and without removing the plates D, it being understood that these furnaces are usually made of such a size and with their 5 front door large enough to enable a workman plan shown, it is obvious that it may be applied to other forms of furnaces or heat-generating apparatus, and that it may be applied to any part of thc furnace or apparatus with lik-e results, and therefore I do not desire to be understood as limiting its application or use to this particular furnace or to the special part of the furnace here shown, as I propose to apply it whereever and whenever it can be with advantage. 4

In order to adapt the furnace to the varying conditions of the weather, I provide a valve, V, which, as shown in Figs. 1 and 2, I locate at the center of the front chamber, N, which connects the front ends of the horizontal heat-tubes H with the smoke-pipe I. As shown in Fig. 2, these heat-tubes H are usually ten in number, (though there may be more or less,) half being arranged at one side and the other half at the opposite side, as shown.

The valve V, as shown in Fig. 2, is hinged or pivoted at its lower edge and arranged to be swung to one or the other side of thesmokepipe I, as indicated by the dotted lines in Fig. 2, it being of a width equal to that of the chamber N, as shown in Fig. l, so that when moved to one side it will cut off the passage of heat and smoke through the tubes H on that side, and consequently will reduce the heating capacity of the furnace, because, as -there will lthen be no communication between the heat-tubes H on that side and the smokepipe I, there can of course be no draft through them, and consequently no passage of smoke and heat. The valveV can be thrown to either side, thus shutting off the smoke and heat 5 5 from either side at will.

,When it is desired to utilize the furnace to -its full heating capacity, the valve V will be set in a vertical position, as indicated by the full lines in Fig. 2, in which case it will stand 6o directly opposite the center of the smoke-pipe ber N is curved to correspond with the arc of 6 5 the circle in which the free'end of the valve swings, so as to effectually close the space, or it may be made straight at that part and have av flange project downward within the chamber at the point on each side where the valve is to stop, the valve in that case resting against said ange, which,together with the valve,will close the space just the same.

In order to adjust the valve and secure it in position, it has attached to or formed with it a stem, Z, which projects through a curved slot, u, in the front wall of the chamber N, as`

shown in Fig. 1, this stem Z having a screwthread on it, to which is applied a thumb-nut, 0, as shown, by which the valve can be fastened in any position desired. A small plate will be placed on the stem Z before applying the nut o, so as to cover the slot n; or, what would be the same in effect, the valve' V may have small flanges cast on or secured to it of 8 5 the proper size to cover the slot on the inside, as shown in Fig. 4. By means of this valveI am enabled to adapt the furnace to the varying conditions of the weather and requirements of the building. Whenever the weather is severe, the valve will be adjusted at the center, when ythe furnace can be run to its full capacity, thereby producing a degree of heat which would be intolerable in mild weather,

may be applied to them all, whether they be,

made with or without the vertical air-tubes C. The grate is not described, as it will form the subject of a separate application. y

Having thus fully described my invention, what I claim is- .1." An expansion -joint for furnaces, constructed substantially as described, and which consists of a metallic plate, A, provided with a rib, a, the plate D, provided with the .iiange or rib e, and the plate B, provided with the iiange b, said parts being arranged to operate substantially as shown and described.

2. The combination, in a furnace, of the smoke-chamber N, sets of smoke-tlues H, entering the same at opposite sides, and an out` let or smoke pipe, I, leading therefrom, with a valve or damper, V, arranged to shut off the communication between one or the other set of flues H and the outlet orsmoke pipe I, substantially as and for the purpose set forth.

EZEKIEL C. CON DIT.

Witnesses:

M. A. CoNDrr, I. l?. DANA.-

IOO

IIS

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