US2410488A - Floor furnace - Google Patents

Description

J. S. FAGAN FLOOR FURNACE Nov, 5, 1946.

Filed DeC.

13,2243 l l n.

INVENTOR.

Patented Nov. 5, 1946 UNITED STATES PATENT OFFICE FLOOR FURNACE Joseph S. Fagan, Los Angeles, Calif.

1 Claim.

My invention relates to a floor furnace and has for its principal object, to generally improve upon and simplify the existing forms of gas burning floor furnaces and to provide a furnace of simple, compact structure that requires no screws, bolts, rivets or like fastening devices in the manufacture, thus effecting a material saving of time, labor and expense in production costs.

A further object of my invention is to provide a floor furnace of the character referred to, wherein fresh air drawn from the exterior of the building or structure in which the furnace is located, is heated in a burner chamber located in the lower portion of an air circulation chamber, which heated air passes through a grill forming the top of the furnace and said air circulation chamber being surrounded by an air insulation space through which air circulates and becomes partiallyvheated, before discharging into the upper portion of the air circulation chamber and then through the grill.

With the foregoing and other objects in'view, my invention consists incertain novel features of construction and arrangement of parts which will be hereinafter more fully described and claimed and illustrated in the accompanying drawing in which:

Fig. 1 is a vertical, longitudinal section taken through the center of my improved floor furnace.

Fig. 2 is a cross section taken on the line 2 2 of Fig. l.

Fig. 3 is a detail sectional view taken through the center of the gas and air inlet end of the burner tube used in my improved'furnace.

Referring by numerals to the accompanying drawing which illustrates a preferred embodiment of my invention, l designates the outer shell of the furnace, which shell comprises side and end walls, preferably of sheet metal with a continuous flange II projecting outwardly from the upper edges of said walls.

This flange rests directly upon a floor F of the building in which the furnace is located with the shell I0 extending downward through opening O formed in said floor.

The side and end walls of a shell I3 which encloses the air circulating chamber, are disposed within and spaced apart from the walls of outer shell I0, thus providing a narrow air circulating space I3 between the walls of the shells I0 and A flange IQ projects outwardly from the upper edges of the walls of shell I2 and overlies flange II. Removably positioned in the upper portion Application December 28, 1943, Serial No. 515,931

of shell I2 is a grill l5, preferably of cast or pressed metal, and projecting outwardly from the edges of said grill, is an integral iiange I6 which overlies flanges II and I4 and the outer portion of said flange lIE rests on the floor in which the furnace is installed.

Inner shell l2 is provided with an integral bottom I 'l and resting thereupon are the lower edges of the walls of the burner shell or housing I8 closed at the top by an integral plate I9.

The Walls and top of the burner shell or housing I8 are spacedv apart from the walls of shell I2 and from grill I5, thus providing an ample air circulation chamber entirely around and above said burner shell, and as above stated, the walls of said shell rest upon bottom I'I, without being attached thereto, and thus said shell may be bodily removed from and positioned within the air circulating chamber.

Formed in bottom Il are apertures 2Q which admit fresh air to the burner chamber in shell I3 and apertures 2l formed in said bottom admit fresh air to the lower portion of the air circulation chamber shells I8 andIZ.

Formed in the upper and lower portions of the side and end walls of shell I8 are air'circulation apertures 23. Formed in the lower portions of the side and end walls of shell I2 are fresh air inlet apertures 24 and formed in the upper portions of said walls arev air circulation apertures 25.

Located in the lower portion of the chamber with the shell I8 is a conventional gas burner tube 26 having at its inlet end, the usual rotating damper 2l, provided with a centrally disposed opening for the reception of the gas nozzle projecting from the gaseous fuel control valve 29, the latter being actuated by a rod 30 which ex' tends upward through grill I5 and having a knob or key3I on its upper end. v

Formed in the end portions of top I9 of the burner shell are apertures 32 of suflicient size to admit lighted tapers or the like, introduced through grill I5, for the purpose of lighting the jets of gas issuing from the burner tube. When the furnace is in use and burner tube is lighted, the air within shell I 8 will be heated and discharge through apertures 23 into the chamber within shell I2, thus inducing a continuous flow of fresh air through apertures 20 into the burner chamber to be heated therein and ow therefrom through apertures 23 into the chamber within shell I 2. Thus heated fresh air will flow from the chamber within shell l2 upward through grill I5 into the room in which the heater is located.

lips. 3

At the same time, a flow of fresh air will be induced into the open lower end of circulation Space I3 between shells I0 and I2 and this air flowing upward through said space will become heated to a certain degree as a result of contact with the heated wall of shell I2, and this preheated fresh air forms an effective air insulation entirely around shell I2 and finally discharges throughapertures 25, to` unite with the heated Iare capable of being bodily positioned within and removed from the furnace, and to place said shell and tube in the lower portion of shell I2, said parts are, before grill I5 is placed on top of the furnace, lowered into `the shell i2 until `the lower edges of the walls of shell i3 rest on theY bottom I1 of said shell I2.

The central aperture in damper 2l is now aligned with the nozzle of valve 29 and shell t8 and burner tube 26 are now moved toward valve 29, until the nozzle thereof passes through the aperturein the damper and occupies a position within the inlet end of the burner tube as seen in Fig. 3.

A reversal of the movements just described will d isengage the end'V of the burner tube from the nozzle of valve 29 and shell I8 carrying said burner tube may now be lifted from shell or housing I2. The particularly advantageous vfeatures of my improved construction of door furnaces are: the heating of fresh air drawn from the exterior of the building in which the furnace is located, the entire absenceof rivets, screws, bolts and the like, fastening devices in the manufacture of the furnace, the location of the burner housing within the lower portion of the heated air circulation chamber and the 'provisionof an air insulation space around said air circulation chamber, which latter arrangement materially increases the ef- 4 ciency of the furnace and conserves fuel requirements.

Thus it will be seen that I have provided a floor furnace -which is simple in structure, inexpensive of manufacture and very effective in performing the functions for which it is intended.

It will be understood that minor changes in the size, form and construction of the various parts of my improved floor furnace may be made and substituted for those herein shown and described without departing from the spirit of the invention, the scope of which is set forth in the appended claim.

I claim as my invention:

A floor furnace comprising an outer shell open top and bottom with imperforate side walls, an

inner shell disposed within said outer shell, the

side walls of both shells being spaced apart, the top of said inner shell being open, a flange projecting outwardly from the upper `edge of said inner shell and resting on the upper edge of the outer shell so as to close the upper end of the chamber between the walls of the two shells, a perforated plate closing the bottom of said inner shell, there being air inlet openings formed in the upper and lower portion of the walls of the inner shell, a separately formed, one-piece rectangular burner housing within said inner shell with the lower edges of the side-and end walls thereof resting on said perforated bottom plate so that the latter provides a closure for the bottom of the chamber within said burner housing, the walls and top of said housing being provided with air outlet openings, a burner tube positioned in the lower portion of said housing with its ends removably positioned in the end walls thereof so that said burner housing and tube may be positioned within and removed from the chamber within said inner shell as a unit, a grill removably positioned in the open upper end of said inner housing and a flange projecting outwardly from the edge of said grill and overlying the flange on the upper edge of said inner shell.

JOSEPH S. FAGAN.

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