US1675384A - Auxiliary heating attachment for furnaces - Google Patents

Description

Jul 3", 1928. 1,675,384

' W. SCHAU AUXILIARY HEATING ATTACHMENT FOR FURNACES Filed Jan. 31/ 1927 IN ENTOR. W j g,

ATTORNEY.

Patented July 3, 1 928.

WILLIAM SCHAU, 0F KALAMAZOO, MICHIGAN.

AUXILIARY HEATING ATTACHMENT FOR FURNACES.

Applieation flled January ,31, 1927. Serial No. 164,828.

This invention relates to new and useful improvements in an auxiliary heating attachment for furnaces.

One object of the invention is to provide an auxiliary heating attachment for hot air furnaces whereby the heat from the hot air and smoke passing from the furnace to the smoke stack, or smoke utilized.

Another object of the invention is to provide a furnace attachment of the character described embodying an air inlet pipe for admitting outside air and passing the same around the smoke pipe or flue and discharg- 5 mg the same into the room or building to be heated, with a damper for controlling said air inlet pipe.

With the above and other objects in View this invention has particular relation to cer tain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawing, wherein j The figure shows a vertical sectional view of the apparatus, as applied to a hot air furnace.

Referring now more particularly to the drawing, the numeral 1 designates a hot air furnace, as a whole. The main hot air pipes through which the heated air may be distributed throughout the building have not been shown, as they are in common use, and their construction and arrangement are well known and they form no part of this invention.

The numeral 2 designates the smoke stack, or smoke flue, through which the smoke is ultimately discharge The numeral 3 designates an outer drum, or jacket having the annular end plates 4, 4, and within and spaced from the walls of this jacket, with. its ends anchored. to the respective end plates 4 and concentric there with, there is an inner drum 5 forming an air circulating chamber 6 between said drums. The inner drum connected into the main smoke flue 2 through the connect ing pipe 7, through the wall of the flue 2 and the other end of which is anchored to the adjacent end plate 4 of the drum 3.

Leading from the combustion chamber of the furnace 1 there is a smokepipe 8 which,

connects into the end of the inner drum 5 reniiote from the smoke stack 2, and this pipe 1 which is spaced outlet flue may be ment 14 w i The heat from the hot out from the furnace through the smoke one end of which projects,

8 is surrounded and enclosed by a jacket 9 away from said pipe and which enters the corresponding end of the air chamber 6, and leading out from said air chamber 6 and entering the room or building to be warmed there is a hot air delivery pipe 10. Leading in from the free air there is an air inlet pipe 11 which enters the other end of the chamber 6 and leading therefrom there is a branch pipe 12 which is connected into the jacket 9.

The end plates 4, 4, have the pulleys as 13, attached thereto and there is a damper controlling element designated generally by the numeral 14 which is connected, at one end, to one of the end plates 4, at the point 15, and this element is located in the inner drum 5 and is threaded around 13 and its other end is extended flexible and works over a ries a wei ht 17.

and formed pulley 16 and car- The sections of the eleich work around the pulleys 13 are flexible, as at 18, and between these flexible sections said element may be formed of metal rods'which are responsive to varying tem eratures.

T e air inlet pipe 11 has withinit a downwardly opening damper 19 to which the depending end of theelement I4 is attached.

When the damper 19 is open free air will enter through the pipe 11 part of which will enter one end of the chamber 6 directly from said pipe'aud the remainder of said air will pass through the branch pipe 12 and the jacket 9 and will enter the other end of said chamber 6. The warmed by the smoke pipe 8 and the inner drum 5 and will pass thence through the delivery pipe 10 into the room to be heated. air and smoke passing stack will, in a measure thus be conserved.

The length of the element 14 will vary in accordance with the temperature, within the inner drum 5. When the air passing from the furnace through this drum is hot the element 14 will be extended permitting the weight 17 to open the damper 19, but as the temperature in said drum lowers, said element will contract, corresponding] closing said damper, to the end that air Wlll be ad mitted only when the drum 5 is hot enough to heat the air passing around it into the room to be heated and will be shut off when the drum 5 has not sufficient temperature to heat the lDflDWlIlg air.

the pulleys air so entering will be inletpipe chamber of the furnace and connected into the innerrdrum, a jacket surrounding and spaced from said smoke pipe and entering one end of said chamber, an air inlet pipe connectedinto the other end of said chamber, a branch pipe leading from said air and connected" into said jacket.

In testimony whereof I have signed my 11 ELIIIG.

WILLIAM SCHAU.

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