US627525A - Hot-air furnace. - Google Patents

Description

No. 627,525. Patented lune 27, |899. L. S. PFUUTS.

HOT AIR FURNACE.

(Application Bled Jam 20, 1899.)

2 Sheets-Sheet l.

(No Model.)

me Nonms PETERS co. Pnmaumo.. wAsNmToN. n. c

N01.. 627,525., Patented lune 27, |899.

L S. FFOUTS.

H-LUT AIB FURNACE.

(Application filed Jan. 20, 1898.)

(No ModeL) 2 Sheets-Sheet 2.

me NoRms PETERS ca, vnovouno., WASHINGTONA u. c.

UNITEDV STATES PATENT OFFICE.

LEROY S. PFOUTS, OF CANTON, OHIO, ASSIGNOR TO THE CANTON FOUNDRY AND MACHINE COMPANY, OF SAME PLACE.

HOT-AIR FU RN'ACE.

SPECIFICATION forming part of Letters Patent No. 627,525, dated June 27, 1899.

Application lec'l January 20J 189s. Serial No. 702,854. (No model.)

To all whom it may concern:

Be it known that I, LEROY S. ProU'rs, a citizen of the United States, residing at Canton, county of Stark, and State of Ohio, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following is a specification.

One object of my said inventionis to provide afurnace made up of a plurality of secro tions, any one of which may be readily replaced in case of breakage, and having a sec# tional inner re-pot or lining which may be easily removed through the fuel-opening and replaced in the same manner without necessitating in any way the dismantling of the furnace. y

A further object is to provide a sectional furnace in which in case of any gas escaping from the fire-pot the likelihood of its reachzo ing the hot-air chamber will be reduced to a minimum.

A still further object is to secure a furnace in which the most complete combustion possible shall be secured by reason of hot air bez 5 ing sprayed over or upon the upper surface of the bed of coal.

I have illustrated the invention in the ac companying drawings, in whichl Figure lis a central vertical section through 3o a portion of a furnace sufficient to illustrate my invention. Fig. 2 is a section taken' at right angles to Fig. l. Fig. 3 is a sectional View with the inner lining removed, and Fig. 4 a detail. v

3 5 In the drawings, the numeral l represents a metal base of suitable form having a iiange I, forming a recess near its outer edge to receive the lower edge of the outside jacket or casing 3. A second groove or channel Ib is 4o formed -near the center, preferably, by two equidistant ribs or beads', within which groove is seated the lower edge of section 2, which forms the ash'pit or chamber, this section eX- tending to the front of the casing, as shown in Fig. l, to the point where the usualash-pit door is provided. This section 2 is provided at its upper edge with a groove or channel 2,

and also has inwardly-projecting ledges for the support of the ordinary or any desired 5o grate.

Upon the ash-pit section is placed a fire- C pot-supporting section 4, which has a depending rib 4a, fitting within the groove in the upper edge of the section 2. The upper face of the ring-section 4 is provided with two concen- 5 5 tric grooves or recesses 4b and 4c, the inner, 4C, being preferably wider than Vthe outer. A circular section 5 su rmounts this ring-section and is provided with a rib or flange fitting snugly the groove or channel 4", the lower edge of 6o the section 5 being extended, preferably, inward slightly beyond the ange to form a bearing-ledge 5a. From the ring-section 4 the section 5 flares or curves outwardly, and it is provided at its upper edgewith two concentric channels or recesses 5b and 5C, the outer,

5, being preferably arranged at a higher elevation than the inner. A section 6 is located within the section 5 and is provided with a laterally-extending upper edge, which in its 7o turn carries a downwardlypro ]'ecting rib or flange adapted to rest within the groove or channel 5", by which the section 6 is supported, while its lower edge abuts against the edge 51.v From this construction it'will 75 be observed that the sections 5 and 6 together form a circular air space or ring, to which air is supplied'from an air-trunk 14, which is formed integral with the section 5 and eX- tends to the-front 'of the furnace casing or 8o jacket. In the other channel 5C, before referred to, rests the lower edge of an outer section 7, the upper' edge of which is also provided with aV groove or channel, (indicated at 7?.) AboveV this is located a ring-section 8, 85 approximately semicircular in cross-section, which'isprovided at its lower face or edge with au annular iiange or rib adapted to rest in the channel or groove 7a, while its upper edge is provided with a groove or channel S 9o and an annular depending bead or flange Sb. In'connection with this upper ring-section 8 I provide a plurality of perforated sections 9, each of which is provided with an inwardlyextending :rib or flange, which is adapted to rest on the inwardly-projecting lower edge of the section S, while'the upper end of the perforated section rests behind the depending flange Sb. The ring 8 and sections 9 thus form an annular air ring or chamber, comroo municating by means of the plurality of perforations with the interior of the lire-pot above the fuel-line. In order to supply air to this ring, a pipe or pipes l2 are provided, extending between the rings 6 and 8, as clearly shown in Fig. 2, and connected to each in any suitable or desired manner.

The numeral 1l designates the inner lining of the fire-pot, which is made up of a series of sections of reproof material of a size adapted to be readily removed through the fuel-opening B. These sections rest at the lower ends in the groove or channel 4C, while their upper ends abut against the lower portions of the inner faces of the sections 9, thus holding them against inward displacement. The section 8 is sui-mounted by a dome l0, having its lower edge resting in a groove in the upper edge of the ring S, while above the dome may be placed the ordinary radiator, which, as it forms no part of the present invention, is not illustrated herein.

The manner in which the air for combustion passes to the fuel will be readily understood from the foregoing description. Cold air passing through the trunk 14 into the annular space between the ring 5 and G comes in contact with the highly-heated metal. Part of the air passes directly to the fuel through openings a and b, formed, respectively, in the ring or section 6 and 011e of the innerliningpieces l1. The remaining air, heated by the walls of the circular chamber, passes upward into the upper circular chamber between sections S and 9, its temperature being raised during the passage, and in a highly-heated condition is sprayed through the openings in the sections 9 upon the body of fuel within the fire-pot, thus causing complete combustion of all gases and the like given od by the burning fuel.

Ordinarily where any cracks occur in the fire-pot gases can escape directly into the airspace. In my construction it will be observed that this is ilnpossible, as owing to the deadair space formed between the outer ring 7 and the inner lining any gas escaping from the combustion into this space will simply rise up into the upper portion of the fire-pot.

IIaving thus described my invention, what I clailn is- 1. In a furnace, the combination with the lire-pot and outer easing, of a lower annular air-chamber, an upper air-chamber communicating through openings with the interior of the fire-pot, an outer wall or section extending between the two chambers and forming a dead-air space between the fire-pot and outer wall, and pipe communication between the lower and upper annular air-chambers, substantially as described.

2. In a furnace, a lower annular air-chamber, an upper annular air-chamber, air-pipe connections between the same, a {ire-pot linsupported from the wall of said lower chamber, an upperannularair-chambersupported from said outer wall, an inner fire-pot lining consisting of a plurality of sections resting at their lower ends upon the fire-pot-supporting section and extending upwardly to the upper annular air-chamber, and air-pipe connections extending between said chambers through the space between the ire-pot lining and outer wall with communicating openings between the upper air-chamber and the tirepot, substantially as described.

4. In a furnace, a lower annular air-chamber encircling the fire-pot, an outer wall supported therefrom, an upper ring substantially semicircular in cross-section supported from said outer wall, a plurality of perforated sections removably seated against the open side of said upper ring, a fire-pot lining comprising a plurality of sections removably supported with their lower ends in proximity to the lower annular air-chamber and their upper ends abutting against the inner faces of the perforated sections, and pipe connections from the lower annular air-chamber to said upper ring, substantially as described.

5. In a furnace, a base, an ash-pit section 2 resting thereon, a ring 4 resting on said section 2, a section 5 curved in cross-section snpported from said ring, an inner section 6 having an outwardly-curved upper edge engaging the upper edge of section 5 and forming therewith an annular chamber, an outer annular wall 7 supported by the section 5, an upper annular section 8 carried by the wall 7, removable perforated sections 9 closing the open side of section 8 and forming an annular chamber, air-pipe connections between said annular chambers, and a fire-pot lining comprising a plurality of sections removably supported upon the ring-section 4 and extending upwardly and abutting against the lower inner faces of the perforated sections, substantially as described.

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

LEROY S. IFOUTS.

\V i tnesses:

GEO. W. JAHN, W. II. CAVNAH.

IOO

ITO

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