US9358A - peters - Google Patents

Description

3 Sheets-Sheet 2.

A. M. RICE.

Hot-Air Furnace.

Patented Oct. 26, 1852.

No.' 9,3518. A

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3 Sheets--Sheet 3. A. M. RICE.

Hot-Air Furnace.

Patented Oct. 26, 1852.

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UNITED STATES PATENT OFFICE.

AUGUSTUS M. RICE, OF BOSTON, MASSACHUSETTS, ASSIGNOR To HIMSELF AND S. H. LOMBARD.

HOT-AIR FURNACE.

Speccation of Letters Patent No. 9,358, dated October 26, 1852.

To all 'whom it may concern:

Be it known that I, AUGUSTUS M. RICE, of Boston, in the county of Suolk and State of Massachusetts, have invented an Improved Furnace for Heating Air for I/Varming Buildings; and I do hereby declare that the same is fully desecribed and represented in the following specification and the acvation of it.

companying drawings, letters, figures, and references thereof.

Of the said drawings Figure 1 denotes a top view of my said furnace, Fig. 2 is a front elevation of it. Fig. 3 is a side ele- Fig. I is a central, vertical, and longitudinal section of it. Fig. 5 is a horizontal section taken through the upper horizontal pipes of the radiator. Fig. 6 is a horizontal section taken through the lire place doors. Fig. 7 is a horizontal section taken through the lower horizontal pipes of the radiator. Fig. 8 is a horizontal section taken through the ash pit. Fig. 9 is a transverse, vertical, and central, section.

In the above figures -I have exhibited the metallic part of a furnace that is usually set in brick work and within a hot air chamber or chamber into which cold air is introduced, heated by contact with the radiator, and finally discharged through pipes leading Out of the upper part of the said chamber.

In the said drawings A represents the fire pot of the chamber of combustion B, the said fire pot being arranged within the chamber of combustion, and so that there shall be an air space C for air to pass between the external surface of the fire pot and the concentric internal surface of the chamber B. This space C is made to communicate with a chamber D which surrounds or partially surrounds the ash pit E (furnished with a door E), and is entirely separated from it, so that no air from the ash pit can pass into it. The front of the chamber D is provided with air inlet holes a, a, a, &c., to which one or more sliding valves or'doors o, o, are applied in such manner as to enable a person to close such holes to such extent as may be necessary.

The grate is seen at F. The air which passes up through the grate for the supply of the fire, rst passes into and through the ash pit when its door G is opened, and such air is employed to kindle the fuel and make it burn upward. When the fuel is sufiiciently on fire the ash pit door may be closed and the holes a, a, &c., opened to such extent as may be necessary to allow sufficient air to pass into the chamber D, and from thence up the space C and into the chamber of combustion, where mingling with the volatile products of combustion it will enable the fire to burn downward. rIhe draft around the external sides of the fire pot will not only aid in preventing it from being burned out, but will absorb and carry off much of the powerful heat radiated directly from its sides, and which might otherwise tend to destroy the lower part of the casing composing the outer boundary of the chamber of combustion.

From the above it will be seen that I employ an air chamber D separate from the ash pit. I have heretofore made a stove wherein the air space around the fire pot was made to receive its air directly from the ash pit; but as by such means the regulation of the admission of air to t-he space above the fuel as well as that of the air through the grateand fuel cannot be separately provided for, I have by employing the separate chamber D obtained a means of not only causing all the air for the supply of combustion to be let into the chamber B, above the fire pot, but I can so let in only a part of it while the rest is made to pass up through the grate and fuel.

The grate F has a journal c extended from one side of it and in line with a key shaft I-I, whose inner end is made polygonal in form and inserted in a socket piece d cast on the opposite side of the grate. The grate, its socket piece (into which the end of the key shaft H fits) and journal c are so made and applied to the furnace that not only is the grate supported by the journal and the key shaft, but when the latter is withdrawn out of the socket the grate may fall down into the ash pit. The key shaft has a collar e fixed upon it, which by contact with a flanch Z of the ash pit door opening plate keeps the shaft from being drawn backward out of the socket piece. A notch f is made in the flanch CZ for the reception of the shaft and to form a bearing for it.

The brickwork of the furnace is to be so constructed that the shaft may be lifted upward at any time out of the notch, so as to enable a person to withdraw it out of the socket of the grate, and then allow the grate to fall down. The shaft is supported near its inner end in a bearing at h. A crank i is fixed on the outer end of the shaft for the purpose of enabling a person to rotate the grate at any time suiiiciently to discharge into the ash pit all or part of .the ashes or fuel in the fire pot. By making the grate with a socket and one journal and supporting the grate in part on the turning key shaft we have the advantage of readily removing a grate from the ire pot and supplying a new one whenever it may be necessary so to do.

The chamber of combustion is surrounded on its `sides except where the fuel passage I enters it by a concentric chamber or flue space K, out of whose rear a pipe L is carried and made to open into the main discharge pipe M, in rear of a damper or flue valve N that is placed in the pipe M, the

isame being as seen in Fig. 4 of the drawings.

The pipe M opens out of the radiator and just above where thedischarge pipe ofthe chamber of combustion is made to enter the same. The radiator is composed of the chamber K, a horizontal pipe P, whose ends open out of the front of the said chamber at its lower part, the pipe being carried nearly around the chamber, a series of vertical pipes Q, Q, Q, opening out of the pipe P and extending upward and opening into a horizontal flue R, made in the form as seen in Fig. 5. Each of the horizontal flues P and R, is provided with two branch pipes T, T, that are made t-o open out of the front of the same and to extend through the brickwork, so as to enable a person to get access to the interior of the flues for the purpose of cleaning them when foul. The outer end of each branch pipe is provided with a cover U that may be removed at pleasure. When the damper N is closed the smoke and volatile products of combustion will pass into the upper part of the radiator and circulate through the flue R of the same, will pass down the vertical pipes Q, Q, &c., and into the flue P.

From there it will pass into the chamber or flue space K, and pass through the same and in contact with the external sides of the chamber of combustion, and finally pass through the pipe L and into the discharge pipe M. By opening the valve or damper N, the smoke will escape directly through the pipes O and M, without first coursing through the radiator. The draft through the radiator is greatly facilitated by having the smoke pass in contact with t-he hot external sides 'of the chamber of combustion just before it escapes into the discharge flue.

The radiator made in the manner as above described and set forth in the drawings presents a very extended heating surface, and under such circumstances we obtain the requisite draftthrough it by the arrangement of lues as specified.

What I claim as my invention is as follows:

l. I claim the improved mode of making and supporting the grate, viz., by the combination of a single journal, a socket piece,

and a crank key shaft, as applied to the furnace and grate and made to operate substantially as specified. Y

2. I also claim' the peculiar combination and arrangement of the horizontal flues P, R, the lvertical flues Q, Q, Q, and the flue space K surrounding the chamber of combustion, the whole being essentially as above specified. j

In testimony whereof I have hereto set my signature this twenty-sixth day of March,

AUGUSTUS M. RICE. Witnesses:

R. I-I. EDDY, Y G. W. CUTLER.

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