US918812A - Hot-air furnace or heater. - Google Patents

Description

E., W. ANTHONY; HOTl AIR FURNACE 0R HEATER., i

- AIYPLIOATION FILED QUT. 22, 1906! 918,812'.

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HOT AIRTURNAGE on HEATER. APPIIOATIQNTILED 00T. 22, 1906. y A

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UNITED sTATEs EDGAR W. ANTHONY, OAF BROOKLINE, MASSACHUSETTS.

Hor-Air. FURNACE on HEATER.

Specication of Letters Patent.

Application led October 22, 1906.

Patented April 20, 1909.

Serial No. 339,955.

To all whom 'it may concern:

Be it known that I, EDGAR `W. ANTHONY, of Brookline, in the county of Norfolk and State of Massachusetts, a` citizen of the United States, have invented a new and useful Improvement in Hot-Air Furnaces or Heaters, of which the following is a full,

clear, and exact description, reference being had to the accompanying drawings, forming a part of this specication, in explaining its nature. 1

The essential object of my invention is to provide a furnace of'a simple and compact structure with as large an area of heatradiating surface as possible, and to direct the currents of air over said heat-radiating surface or surfaces.

My invention accordingly consists in various details of construction all of which can be seen and understood by reference to the drawings, in which Figure l shows the Vfurnace in vertical section. Fig. 2 shows a plan of the furnace with the dome or` head thereof removed. Fig. 3 shows in side elevation the radiator forming one of the essential elements of the improved furnace construction. Eig. 4 shows a cross section on the line 4--4 of Fig. l, and Fig. 5 shows in side elevation one of the radiator plates to which special reference will hereinafter be made.

Referring to the drawings z--A represents the exterior casing or wall of the, furnace. On this is mounted the hood or dome A1 having exit passages a for the escape and distribution of hot air. al represents the fire-pot withinl which is formed the combustion chamber a2. Entrance into the lirepot is by way of the feeder a3 controlled by a door at forming a portion of the exterior wall of the furnace. a5 represents the grate having the grate rod a6. Beneath the grate is an ash-pit' al, entrance to which is controlled by the door a8 forming a portion of the exterior wall of the furnace.

Surmounting the fire-pot is a radiator A2 connecting with the interior of the combustion chamber. Through this radiator the products of combustion are directed to pass and ultimately escape through an outlet pipe a9, as will hereinafter be, explained. This radiator together with the fire-pot furnishes the means for heating air which rises from the cold air chamber al formed between the shell or wall of the furnace and the lire-pot and escapes through the exit passages c in the hood or dome of the furnace.

The radiator A2 is preferably of annular structure, made relatively deep. lIt is also preferably made in two parts all, cl2 connected by a common cup jointure als.

The products of combustion are supplied to the radiator from the combustion chamber by the smoke arm a which connects with an extension x15 to the fire-pot. This extension a forms practically a portion of the lire-pot, but for convenience it is referred to as an extension thereto. It is secured to the fire-pot by a cup jointure am. It is yalso to be noted that both the extension a and the smoke arm al are contained within the inclosure of the radiator. The radiator is supported by the fire-pot or rather extension thereto through the interposition of the smoke arm an. The

smoke arm connects with the upper portion a of the radiator, the lower portion am thereof being secured to the upper portion by means of lugs a joined by screws or other mode of fastening. The radiator is supported in such position that ample air space will be left between it and the exterior casing of the furnace. Its position relatively to the fire-pot is such that a somewhat restricted air passage will be formed between it and the fire-pot in order that the air which enters through this passage to course upwardly through the inclosure of the radiator will not pass too quickly. .Other means for supporting the radiator auxiliary to that above described may be employed if necessary. Attention is also called to the fact that the lower portion of the radiator is cut away in part at als in order to clear the feeder a3.

After the products of combustion or heat has passed up through the extension L15 and smoke arm a into the radiator, it is made to pass through the radiator before escaping through the smoke or outlet pipe a9 by means of a direction-plate al which is located diagonally crosswise the radiator at a point adjacent to the outlet pipe a. In this plate is located a damper w20. The bottom part of the radiator is also provided with one or more clean-outs a each of which is closed by a cap 1122. Access to each of the clean-outs is had through the adjacent outer wall of the furnace by van opening [ffclosed by a cap a.

With the parts larranged as above described, a large amount of heat-radiating surface is provided for heating the air from the cold air chamber.V The outer side of the radiator will act to heat that air contained in the space between the radiator and the shell of the furnace Both the fire-pot and radiator will act to heat the air which' enters the somewhat restricted passage formed between these respective parts. The air entering this passage will pass upwardly through the inclosure of the radiator and there be subjected' to heatprovided by the radiating surfaces afforded by the inner side of the radiator on the one side and the extension to the fire-pot on the other. it will also encounter the smoke arm acting as a further heat-radiating surface. F or the purpose of providing` a still greater heat-radiating surface the upper portion of the radiator is formed with a series of deep recesses or openings a2 extending down from the top thereof and crosswise through the same. In order that the air which rises along the outer side of the radiator may be directed to flow into these recesses or openings and over the heatradiating surface thus formed the top of the air-passage leading from the cold air chamber am alongside the outer surface of the radiator and into the head or dome of the furnace, iselosed by a plate or rather a series of plates a2 held together by flanges and screws et.

I uThe plate or plates ai, annular in form or arrangement, extend from the` outer wall of the furnace at a kpoint substantially fiush with the upper part of the radiator over onto the same, closing. said air-passage and directing airvto pass into andover the radiating surfaces formed by the recesses or openings (425 in the radiator. The plate or plates a2 act also to baffle the air preventing it, in other words, from liowing directly into the head or dome of the furnace from the cold air chamber and causing it to be retarded along the outer heating surface of the radiator before being directed to fiow through the radiator in .the recesses or openings formed therein.V The deep indentations afi besides providing a large amount of auxiliary heat-radiating surface, perform also a stillI furtherv and important function. In a radiator like the one described, made relative-lyy deep, the tendency of the heat rising would be to iow. in and around the top of the radiator to the exclusion of the bottom thereof, which would not receive its adequate amount of heat.v Nowit is very necessary that the bottom part of the radiator should be Vproperly heated, for there the radiator first receives the impact of the cold air. The recesses or openings formed in the upper portion of the radiator perform the function of causing the heat entering the radiator to How around the bottom part thereof on which account the entire radiator be.` comes properly heated.

In order to provide a still further heatradiating surface there are shown interposed between the radiator on the one side and the extension nl on the other a series of preferably corrugated plates It. 'lhey are preferably made looftl hanging dependent from flanges a2" resting upon indented lugs (/f formed upon the top of the radiator a nd the extension a, respectively. 0n' account of these plates beingl snugly interposed between the radiator and the extension ,f from the combustion chamber they become intensely heated and so provide auxiliary heat-radiating surfaces both for the air which rises from the cold air chamber between the radiator and the walls 0"" forming a portion of the extension from the combustion chamber and for the air which is directed to pass through the transverse recesses or openings in the radiator. The plates u?" perform, also, the function of providing a more equal dist ribution of air by causing the air to l'low up in a series of passages instead of through one an nular passage., if the plates were removed. i'nder certain atmospheric circumstances the air sometimes has a tendency to rise more upon one side ot' the furnace than upon the other, and these plates by providing a series of passages prevent such unequal distribution of the cold air.

Having thus fully described my invention, l claim and desire to secure by Letters Patent of the United States:-

l. In a furnace or heater of the character specified, the combination of an outer casing and inside the same a fire-pot, a radiator surmounting the fire-pot and so located relatively to said fire-pot and casing that air may course upwardly over said radiator on both the inner and outer sides thereof, said radiator having also transverse recesses or openings therein, an extension to said firepot, a connection between it and the inner side of said radiator whereby the products of combustion are directed from the fire-pot to pass into and through said radiator, said extension and connection being located within the inclosure of said radiator and forming heat-radiating surfaces to the air coursing upwardly over the inner side of said radiator, and means for baflling the air and directing it to pass up over said radiator on the outer side thereof to pass through the transverse recesses or openings therein and be heated by the auxiliary heat-radiating surfaces afforded thereby.

2. In a furnace or heater of the character specified, the combination of an outer easing and inside the same a fire-pot, a radiator surmountingthe fire-pot said radiator having transverse recesses or openings therein and located relatively to said tire-pot to form a restricted air passage between it and the lire-pot through which passage air is admitted to course upwardly to pass through the inclosure of the radiator and be heated by the inner radiating surface thereof, a connection between said radiator and firepot for directing the products of combustion to pass from saidrflre-pot into and through said radiator, said connection being located within the inclosure of said radiator and providing an auxiliary heat-radiating surface to the air passing upwardly through the inclosure of the same, and means for baffling the air coursing upwardly over the outer side of said radiator and directing it to pass through the transverse cuts or openings therein and be heated by the auxiliary heat-radiating surfaces aiforded thereby.

3. In a furnace or heat-er of the character specified, the combination of an outer casing and inside the same a fire-pot, a radiator surmounting the fire-pot and so located relatively to said {ire-pot and casing that air may course upwardly over said radiator on both the inner and outer sides thereof, said radiator having also transverse recesses or openings therein, an extension to said firepot, a connection between it and said radiator whereby the products of combustion are directed from said fire-pot to pass into and through said radiator, a series of plates radially interposed between said radiator and the extension from the lire-pot providing auxiliary heat-radiating surfaces, and means for baffling the air passing upwardly over the outer side of said radiator and directing it to pass through the-transverse cuts or openings therein whereby it may be heated by the auxiliary heat-radiating surfaces aorded'by said transverse cuts or recesses and said interposed plates.

4. In a furnace or heater of the character specified, a fire-pot having an extension; a radiator surrounding said extension, and a smoke-pipe connecting said extension with said radiator whereby the products of combustion may enter said radiator, said radiator also being located whereby an air passage is formed between said radiator and the extension from said lire-pot, and a series of loose plates interposed between said radiator and the extension from the said lirepot for directing the air currents and providing auxiliary heat radiating surfaces substantially as described.

EDGAR W. ANTHONY.

lVitnesses:

JOHN E. R. HAYES, vll/IAR'rIN V. FOLEY.

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