US2490464A - Floor furnace closely confined in a pit and having an access door - Google Patents

Description

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A. M. ODOM 1 FLOOR FURNACE CLOSELY CONFIN A PIT AND HAVING AN ACCESS Dec. 6, 1949 Filed July 12, 1946 2 Sheets-Sheet Inventor /7l/-SPHREYM 000M y Qua and n-rllllll lllllllllll.lllllllllllllll hang:

A. M. ODOM FLOOR FURNACE CLOSELY GONFINED IN Dec. 6, 1949 2,490,464 7 A PIT AND HAVING AN ACCESS DQOR 2 Sheets-Sheet 2 Filed July 12, 1946 Inventor JaSPHREYM 000M Patented Dec. 6, 1949 FLOOR FURNACE CLOSELY CONFINED IN A ?IT AND HAVING AN ACCESS DOOR Ausphrey M. Odom, Memphis, Tenn.

Application July 12, 1946, Serial No. 683,022

1 Claim. 1

This invention relates to an access door for a floor furnace and has for its primary object to facilitate the connection of the furnace to a fuel supply pipe and to the flue through which the products of combustion are vented.

Another object of the invention is to permit the use of floor furnaces in pits of minimum dimensions.

The above and other objects may be'attained by employing this invention which embodies among its features an opening through one side of the shell of the furnace through which access may be had to the fuel supply pipe and the flue connection to the furnace, and a door applicable from the interior of the shell to close the opening.

Other features include detachable fasteners operable from the interior of the shell to hold the door in a position to close the opening in the shell of the furnace.

In the drawings,

Figure 1 is a sectional view through a pit showing my improved furnace installed therein,

Figure 2 is a horizontal sectional view taken substantially along the line 2-2 of Figure 1,

Figure 3 is a sectional View taken substantially along the line 3-3 of Figure 2, and

Figure 4 is a sectional view taken substantially along the line 4-4 of Figure 2.

Referring to the drawings in detail, the floor ll] of a building structure is equipped with a pit H to which a cold air duct I2 leads from the exterior of the building in a conventional manner. A conventional floor furnace of the type sold under the trade-mark Coleman designated generally I3 is shown as entering the pit and is supplied through pipes i i with fluid fuel in a conventional manner while the products of combustion are discharged to a flue through a conventional flue pipe connected to the furnace IS. The structure so far recited is that commonly employed except that the pit H in prior constructions must be made of such large dimensions as to accommodate the workmen between the wall of the furnace and the wall of the pit in order to make the necessary connection to the fuel pipe l4 and the flue.

In order to permit the furnace to be employed in a pit of smaller dimensions I form in the outer shell l6 of the furnace an access door opening I! which is adapted to be closed by a removable door panel l8 held to the casing or shell l6 of the furnace by means of suitable fasteners l9 which may be manipulated from the interior of the furnace. It is to be noted that the door it overlaps the marginal edges of the opening I I on the inner face of the wall of the shell as clearly illustrated in Figure 2. A suitable gas-tight gasket is interposed between the overlapping 2 edge of the door I 8 and the adjacent portion of the shell or casing Hi.

In installing the furnace the fuel pipe I4 is equipped with a union 2| carried on a nipple 22 which is of such a length as to permit access to the union 2| through the opening ll. This union is in turn, connected to the fuel pipe 23 of the furnace after the furnace has been lowered into place and before the panel or door I3 is secured in position to close the opening [1. Likewise, the flue coupling 24 of the furnace is connected to the pipe I5 through the opening I! after which the door I8 is secured over the opening from the interior of the furnace in order to effectively enclose the furnace. From the foregoing it will be obvious that a pit l I need be only of a dimension sufiicient to accommodate the furnace and the piping, as access may be had to effect the coupling of the furnace to the piping through the opening l1.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

I claim as my invention:

In a furnace construction including a pit below the level of the floor of a building structure; a floor furnace, said furnace including a heating unit, a shell surrounding the bottom and sides of the heating unit, the walls of the pit closely surrounding the shell, fuel pipe and flue connections connected to the heating unit and disposed outside of the shell adjacent one side thereof, fuel pipe and flue connections in the pit adjacent the side of the shell adjacent which the first mentioned fuel pipe and flue connections are disposed, said shell having an access opening in the side adjacent the fuel pipe and flue connections through which the fuel pipe and flue connections are accessible, and a door detachably connected to the inside of the shell and accessible through the top of the furnace for closing the access opening, the space between the shell and the walls of the pit being inaccessible except through the access opening.

- AUSPI-IREY M. ODOM.

REFERENCES CITED The following references are of record in the file of this patent:

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