US1217551A - Hot-air furnace. - Google Patents

Description

R. R. ARMOR.

HOT Al-R FURNACE.

APPLICATION HLED JUNE 12, 1 916.

1,217,551. Patented Feb. 27,1917.

Robert.R/7rm0r:

fITTOR/VEVJ ROBERT R. All-MOB, LOS ANGELES, CALIFORNIA.

HOT-AIR FUENACE.

Specification of Letters Patent.

Patented Feb. 27, 1917.

Application filed June 12, 1916; Serial No. 103,302.

To all whom it may concern Be it known that I, ROBERT R. ARMon, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Hot-Air Furnaces, of which the following is a specification.

This invention relates to a hot air furnace and particularly pertains to a gas burning furnace.

It is an object of this invention to provide a. furnace construction in which a gas burner is utilized for heat and which insures thatthe heat generated by the burner will be confined to an area a jacent the outer wall of the heat dome thereby delivering a maximum amount of heat to the furnace jacket. Another object of this invention is to pro: vide a hot air furnace with a gas burner which may be readily installed within furnaces of common construction without change in their design or alteration of their parts.

Another object of this invention is to provide a gas burner which will throw its heat away from the central portion of the heat dome and thereby prevent any considerable portion of it from passin out through the flue without being absorbe by the dome wall 80 and transmitted to the air circulating jacket therearound.

Another object of this invention is to provide a'gas burning furnace with heat retaining elements which act to absorb and trap the heat developed by the burner and thus" produce a more eflicient furnace.

Another object of this invention is to provide simple means for i iting the gas burner which is disposed within the fire box.

in an inaccessible position.

Another object of this invention is to provide a gas burner furnace which heats and supplies clean, pure airwhich is not in any way contaminated by the roducts of combustion formed by the gas urner.

A further object of this invention is to provide a hot air furnace construction which is simple in its design'andcomparatively inexpensive in manufacture and operation.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawing in which the figure is a view in vertical scetion through the hot air furnace and shows the correlation of the vital elements of the invention.

Referring to the drawings more particularly, 5 indicates a hot air furnace which may be of any common type and is here shown as constructed with an outer cylindrical casin 6 inclosing a fire box 7. The fire box is o a diameter considerably less than the casing 6 and thus forms an annular air passage-way 8 which lies entirely around the fire box and is in communication at its lower end with an air conduit 9. The upper end of thepassage-way 8 is connected with suitable radiators by means of heat conducting pipes 10. The fire box 7 is formed with a dome 11 which incloses its upper end and which communicates with a flue 12. A feed door 13 mounted upon the casing 6 com municates with the fire box near its upper end and an ash door 14 communicates with the ash pit of the fire box nearthe'lower end.

As previously stated, the construction of this portion of the furnace is that commonly used in coal or coke burning furnaces.

As a. substitute for the grate bars originally mounted within the fire box, a burner supporting spider 15 is horizontally positioned across the box and supports a circulat burner member 16 which is provided with a continuous series of outlet openings -17 around its outer periphery. The burner may be suitably connected with any gas mixture. I have, however, shown it as rovided with the mixer disclosed in the United States Letters Patent granted me March 7, 1916, and bearing the number 1,174,650.

This mixer is formed with a. cylindrical wall 'regulatingvalve 21 actuated by a chain 22 which leads to a convenient place of opera- As a means for confining the heat against the wall of the fire box 7 a bafile ringl 23 is e u provided and adapted to rest upon t per end of the burner. The ring 23 may formed of cast iron or a vitreous substance and is shaped with its lower opened end of smaller diameter than its upper end thus topering or flaring its walls outwardly and acting to confine the upwardly moving heat. As a means for absorbing a considerable amount of the heat which would otherwise pass through the bafile ring and directly up the flue, the wall of the ring has been formed with continuously occurring corrugations which extend vertically and increase the heat absorbin' properties of the ring without material y increasing its size. Mounted.

upon the upper end of the bafile ring is a vertically disposed cylindrical drum 26 which extends upwardly and terminates at a int adjacent the dome of the fire box to insure that the heat is confined adjacent the outer wall of the fire box until it has passed upwardly the length of the fire box and is ready to pass into the flue.

In order to retard the heat in its upward travel from the burner and to absorb it so that it will be effectively radiated through the fire box wall, a quantity of bafile blocks 24, formed of fire cla or other noncombustible material, is plac between the bafile ring and the fire box wall. As the gas burner will be entirely covered by the blocks 24 an ignition pipe 25 is provided to allow the gas paasin from the burner to be ignited throug the charging door 18 when the furnace is to be used.

It will thus be seen that the gas burning BEST AVAILABLE COP hot air furnace here disclosed may be readily constructed by the use of hot air furnaces now in operation and that the heat generated by the burner will be utilized within the furnace to produce a maximum volume of clean, hot air within the heat chamber of the furnace in a simple and effective manner.

I claim In a hot air furnace, the combination with a furnace having a centrally disposed fire box and an air circulating chamber surrounding'said fire box, of a circular burner horizontally disposed within the fire box, a gas mixer with which the burner connects, means for regulatin the control of gas to said burner, means for causing the gas and flame to pass from the burner in a horizontal plane, flame obstructing and heat absorbing elements through which the flame panes in its upward travel, means for preventi the circulation of air through the center 0 the fire box and over the burner, and means whereby the burner may be ignited while concealed by the flame obstructing elements.

In testimony whereof I have signed my name to this specification.

ROBERT R. ARMOR.

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