US356980A - Nathaniel a - Google Patents

Description

UNITED STATES PATENT OFFICE. i

VNATHANIEL A. BOYNTON, OF NEW YORK, N. Y., ASSIGNOR TO THE BOYNTON FURNAGE COMPANY, OF SAME PLACE.

HOT-Al R FURNACE' vSPE*CIPIECATION forming part of Letters Patent No. 356,980, dated February 1| 1887.

Application filed December 17, 1885. Serial No. 185,900. (No model.)

To all whom t may concern.-

y Be it known that I, NATHANIEL A. BOYN- TON, .a citizen of the United States, residing in the city of 4New York, in the countyr of New York and State of New York, have invented certain new and useful Improvements in Hot- Air Furnaces, of which the following is a de-V lscription. Y

evolved from the burning fuel shall take place partly in the combustionchamber proper and partly in the dues whichlead therefrom, in which the unconsumed volatile products of combustion shall pass by a direct course from the front portion to the rear portion of the furnace, and in which the airin the air-warming chamber shall be quickly but thoroughly heated, and shall be conducted by the most direct course from its point of admissionto such chamber to its point of v discharge therefrom.

Having in view the accomplishment of these ends, my invention consists, in general, of a furnace which is composed of two distinct independentlysupported sections. placed at a considerable distance apart and connected by a series of preferably tubular flues, which are secured at one end to the rear portion of the front or combustion-chamber section at a of the combustion-chamber at a point directly opposite the supply-opening'andimmediately above the upper extremity of the fuel-chamber.

It consists, also, of a novel means in or.in

connection with an upper fine, whereby the` iiow of the products of combustion through such upper iiue is restricted and made equ'al or substantially equal with the flow through the lower flue.

It consists, also, of various other novel parts or Vcombinations of parts, whereby the efficiency of the furnace is enhanced, as will be In the drawings, Figure l represents a central vertical longitudinal section from front to rear of a furnace embodying my improvements. Fig. 2 is a rear elevation of the front section of the furnace, thetubular flues being removed. AFig. 3 is a front elevation of the rear section of the furnace, the tubular flues being removed. Fig. 4. is a horizontal plan view of a section taken on the line w x of Fig.

1. Fig. 5 is a top plan View of the casing of 6o the furnace and its air-Warming chamber, drawn to a reduced scale.

A is the front or main section of the furnace, A being the ash-chamber section, A2 the firepot or fuel-chamber section, andA3 the combustion-chamber or domesection of the same.

This main section A'is provided with a lowerV or ash-chamber door, han upper or feed- `chutedoor, a3, at theouter extremity of the feed-chute a2, and a grate, A4, of any suitable construction. Y

The rear section, B, of the furnace is composed of a main front or diving-flue section, B', and a rear direct-draft and rising-flue section, B2. Upon the rear portion of the combustionchamber section A3 are provided pipecollars a4 and c5 to receive the lfront ends of tubular dues C and C', similar collars, b and b2,

being provided upon the rear section, B, to reflue-opening or'clearing-opening, and these openings are provided with collars b, b5, b, and bl, the latter of which ordinarily receives the lower extremity of the rear pipe or risingflue section, B2, While a similar collar, bs, upon the rear upper portion of the same section receives the short direct exit or direct-draft pipe B3, the opposite end of which 'is fitted upon the collar I)9 of the rising-due section or rear pipe, B2. The section B is seated upon a suitable supporting-base, B4, and the direct ydraft pipe B3 is provided with a damper, bw, for regulating the flow ofthe products of combustion.

5o hereinafter described. The furnace is inclosedfroin end to end by 10o a casing, D, which at suitable intervals along the lower portion, of its vertical walls is provided with openings d for the admission of cold air, and at its top, along the central portion thereof, is provided with openings and corresponding pipes, d', for the discharge of heated air.

Suitable transverse partitions, D', D2, and D, perforated to receive the horizontal flues C and C', may be employed to divide the airwarming chamber formed by the casing into distinct compartments, in which the temperature of the air will vary according to the distance of the compartment from the combustion-chamber.

As will be seen in the drawings, the flues which extend between the two furnace-sections are connected to the combustionchamber at a point but a short distance above the top of the fuel-chamber and directly opposite the feed-chute. Under this construction the fines for a considerable distance from the combustion-chamber become highly heated, and it has been found in practice that the gases of combustion are largelyconsumed within them, thus heating them to a still higher degree. The combustion chamber or dome section being composed of a single casting, as shown, escape of gases, except into the exit or radiating nues, is prevented. By the provision of the annular flanges b an excessive .escape of the heated currents through the upper iiues is eii'ectually prevented without diminishing the radiating-surface of such ilues, and a portion of the heat which would otherwise escape with undue rapidity through these fines is directed into the lower ilues, thus rendering them equal in temperature with the upper ilues without diminishing the aggregate heating capacity of all the flues.

Through the extension of the radiating fines in a direct line from the flat rear wall of the combustion-chamber, and in a line leading directly from the doorway of such chamber, the insertion of afiue-eleaner and the removal of all accumulations of refuse from the fiues are accomplished with the utmost facility. By the provision of the lateral openings in the body of the diving-liuc accumulations of ashes and other refuse are readily removed.

It will be apparent that under some conditions the rising flue might be most conveniently attached at one of the sides, instead of at the rear, of the section B, and that in such case ashes and the like would be removed either through the rear opening or through the side opening opposite to the rising flue.

It will be'obvious that va construction in which the volatile products of combustion pass in a direct line from the very point of their production to the rear portion of the heater insures a quick heating action of such products upon the radiating lines through which they pass, and that a construction in which the air-currents pass almost in a direct line from their point of admission to their point of discharge, and are in their course brought into contact with highly-heated radiating flues, insures the accomplishment of the general object of this invention-that is, the production of a rapid and powerful heater in which the currents flow quickly and directly, as contradistinguished from that class in which either the heat-currents or the air-currents, or both, pass by sluggish movements through tortuous channels.

The walls of the casing D, at points opposite the clearing-openings in the rear furnacesection. will be provided with doors di, and it will be understood that either of the collars b Z b b7 may be covered by a closing-cap, bl.

Having described my invention, I claim- 1. The combination, in a hot-air furnace, of an ash-chamber, a fuel chamber, a combustionchamber, a rear direct and indirect draft furnacesection, and lower and upper flues extending from the combustion-chamber to the rear furnace-section, the lower flue being connected to the combustion-chamber at a point immediately above the upper extremityof the fire-pot, and being of uniform capacity from end to end, and the upper flue being contracted at its point of discharge into the rear furnace-section.

2. In a hot-air furnace, the combination of a front section, a rear section, an upper flue which extends from the front section to the rear section and is contracted at its rear extremity, and a lower flue which extends from the front section to the rear section and is of uniform capacity from end to end.

3. In a hot-air furnace, an ash-chamber, a fuel-chamber above the ash-chamber, a com-l bustion-chamber above the fuel-chamber, a fuel-supply opening in the front wall of the combustion-chamber, a rear diving-flue section, and aseries of iiues connected to the rear wall of the combustion-chamber at apoint opposite the fuel-supply opening and directly above the upper extremity of the fuel-chamber and extending to the rear diving-flue section, all in combination, as described.

4. In a hot-air furnace, the combination of a fuel-chamber, a combustionchamber which has opposite the door thereof and immediately above the upper extremity of the fuel-chamber a series of fiue-openings, a series of tlucs extending rearwardly from the liuc-openings,

yand a rear furnace-section which receives the rear extremity of the flues, such furnace-sec tion being provided with a directdraft pipe, a diving-flue, a rising flue, and an exit-open ing. f

5. In a hot-air furnace, an ash-chamber, a fuel-chamber, a combustion-chamber, a fuelsupply opening in the front wall of the combustionchamber, a rear furnace-section, and a series of ilues which are contracted at their rear extremity,extending from the rear of the combustion-chamber at a point opposite the fuelsupply opening to the front of the rear furnace-section, in combination, as described.

6. A hot-air furnace which consists, essen tially, of a front section which is composed of IOO IIO

an ash-chamber, a fuel-chamber, and a coin-V bustion-cha1nber which is provided with a door or opening in the front thereof, and with a series of flue-openings in the rear thereof, directly opposite to or coincident with the door or opening, a vrear section embracingy a front diving flue and a rear rising flue and having a series of Hue-openings in the front wall thereof, and an exit-opening, anda series of ues, each of which eXtends in line with vthe door or opening from the front section to 8. The combination, with the front fuel- `chamber section, the rear direct-draft and diving an'd rising iiue sections, the intermediate iiues, and the hot-air casing, of the transverse partitions D', D2, and D3, substantially as and for the purposes specified.

y 9. The combination, with a hot-air furnace which embraces a front section, a rear section,

.and a series of ii'ues which connect the two sections, of a casing which incloses the sections and the flues, and which is divided by transverse partitions into several transverse airwarming compartments which, when the furnaceis operated, are of unequal temperatures, 35

as and for the'purpose described.

NATHANIEL A. BOYN TON.

Witnesses:

CHARLES M. BENEDIOT, E. J. HARGAN.

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