US1474032A

US1474032A - Heating furnace

Info

Publication number: US1474032A
Application number: US350663A
Authority: US
Inventors: Helmkee Jacob
Original assignee: J H LA CROIX
Current assignee: J H LA CROIX
Priority date: 1920-01-10
Filing date: 1920-01-10
Publication date: 1923-11-13
Anticipated expiration: 1940-11-13

Description

J. HELMKEE HEATING FURNACE Filed Jan. 10, 1920 3 Sheets-Sheet l ATTORNEY J. HELMKEE HEATING FURNACE 3 Sheets-Sheet 3 Filed Jan. 10 1920- Jacob He [m kee lNVE/VTOR.

Pym

Q Q Wm ATTORNEY $2505 Heinz fere A TTORNEY Patented Nov. 13, 19.23

g i fit l fl JACOB HELIVIKEE, F KENFIORE, CHIC, ASSIGNOR TO 3. H. LA CROIX,

OF CLEVELAND,

OHIO.

HEATING FURNACE. v

Application filed January 10, 1920.

To all whom 2'25 may concern:

Be it known that I, J-ACOB Hnnarxnn, a citizen of the United States, residing at Kenmore, in the county of Summit and State of Ohio, have invented new and useful lmprovements in Heating Furnaces, of which the following is a specification.

The present invention has particular reference to a. heating furnace wherein cold air entering a casing surrounding a firebox, is adapted tobe directed over the firebox and into contact with the exterior surfaces of smoke flues to be heated thereby with the heated air directed through conveying pipes to suitable points of discharge.

A further object of the invention is to provide a heating furnace of the hot air type wherein the combustion and smoke tubes over which the air to be heated is di rected, are located above the firebox, so that heat radiating from the fire box will, in addition to heating the air surrounding the firebox, heat the exterior walls of the fines and adjacent currents of air to increase the heating capacity of the furnace.

With the above and other objects in view, the invention consists in the novel form, combination and arrangement of parts here in fully described and shown in the accoin- 30 panying drawings wherein like reference characters indicate similar parts throughout the several views.

In the drawings,

Figure 1 is a perspective view of a furnace constructed in accordance with the present invention, with a portion of the outer casing being broken away to illustrate the inner firebox and smoke flues superposed thereon,

Figure 2 is a vertical cross sectional view taken on line 22 of Figure 1, and

Figure 3 is a vertical cross sectional view taken on line 33 of Figure 2.

The present invention has particular ref-- erence to a hot air furnace, the same embodying an outer easing into which the cold air is directed for circulation about the firebox positioned within the casing, while smoke lines are superposed upon the firebox and have communication with the upper end of the firebox whereby the smoke and products of combustion are caused to travel in a tortuous path over the top of the firebox and through the fines, while pipe sections are connected to the upper cut of the outer casing of the furnace for supplying Serial Ho. 3 50,663.

heated air to the desired points, the gist of the present invention principally residing in t 1e detailed construction of the flue structure superposed upon the firebox.

Describing the invention more in detail, there is provided an outer casing l, prefer ably cylindrical in form including a bottom wall or mounting base 5 while a cover (3 of depressed formation closes the upper end of the casing l. A cold air pipe 7 communicates with the lower end of the casing 4.- as clearly illustrated in Figures 1 and 2, while hot air delivery pipes 8 are connected to the upper end of the casing for conveying the heated air to desired points.

The firebox i cludes a casing 9 enclosed within the outer casing 41 and spaced from the walls thereof to afford a free unobstruct ed passage atthe lower end of the casing for air entering the pipe 7, while as illustrated in Figures 1 and 2, the firebox 9 is accessible through the medium of the door 10 carried by the outer casing with the chute 11 extending between the casing 4 and firebox 9 for directing the fuel into the firebox 9 for reception upon the grate bars 12.

The grate bars 12 have end extensions 12 for seating in sockets 13 in the side walls of the firebox 9, the grate bars 12 being of the construction more clearly shown in Figures 2 and 3 with passageways through each grate bar, while each bar has a depending pin 14 extending through a shaker bar 15 operated by the arm 16 which in turn is shifted by the operating handle 17 as shownin Figures 1 and 2, while ashes falling into the pit 18 are removable through the chute 19 and the ash door 20.

The upper end of the firebox 9 is-protected with a cover wall 9 spaced a considerable distance from the cover 6 of the casing a while the rear wall of the firebox 9 is provided with a pair of smoke passage openings 21 therein. A rear smoke box has communication with the firebox openings 21 and includes a pair of spaced plates 22 having opposed flanges 23 upon the inner faces thereof which support a band section 2% forming a spacing element for the plates 22,

while said plates are held immovable relative to the band 2% by bolts 25 passing through ears 26 formed on the edges of said plates 22, the smoke box embodying the plates 22 being secured to the firebox 9 by bolts 27 passing through the ears 26 and ears 28 formed on adjacent portions of the firebox 9. As i lustrated in Figure 2, the pipe sections 29 extend between firebox openings 21 and the plates so that the passage between said smoke box and the firebox is established. The upper end of the inner plate 22 is preferably provided with three flanged openings 30, each having communication with a separate line 31, the forward ends of the fines 31 being connected to a forward smoke

box embodying plates

32 and 3?) having opposed flanges ill with the spacing band 35 cooperating with said flanges to hold the

plates

32 and 33 in spaced relation, the wall 32 of the smoke box bein provided with three horizontally alined flanged openings 36 for the reception of the forward ends of the tines 31. Three fines 37 are superposed relative to the lines 31 and are connected at their forward ends to the flanged openings 38 formed in the upper end of the plate 32, while the rear ends of said fines 37 extend into flanged openings 39 in a rear smoke box +210 identical in construction to the smoke box previously described, the smoke box -10 being superposed upon the side plates 22 of the smoke box having communication with the firebox 9. A smoke pipe ll forms communication between the smoke box 40 and a stack or other outlet for establishing a continuous passage from the firebox 9 to the atn'rosphere.

In order to obtain access tot-he fines 31 and 37 for 'prn'poses 'of cleaning the same, or for the repairing of any nature, there is provided an enlarged opening 4-2 in the forward wall '33 of the front smoke box. which opening is surrounded by an outwardly directed flange -l3. A corresponding opening is provided in the front wall of the furnace casing a and receives the closure cap llclosing said opening and received on the fiange 43 with the closure cap forming a component part of the smoke box, increasing the area thereof and lying in the path of travel of the air to be heated. As more clearly illustrated in Figures 1 and 2, the

walls

32 and 33 of the front smoke box are provided with cooperating peripheral ears 4:5 to receive retaining bolts 46, while similar bolts 47 extend between ears L8 upon the walls of the smoke box 40. The smoke boxes above described are retained in position with respect to the lues '31 and 37 and immovable relative thereto by connecting rods l9 extending between ears 26 and at?) of the

plates

22 and 32 and the ears lo'and 4-8 of the plate 32 and smoke box 40. '1 he forward smoke box is supported upon the upper wall 9 of the firebox by'depending feet 50.

From the above detailed description of the invention. it is believed that the construction and operation thereof will be at once apparent, it being understood that the smoke and products of combustion within the rear smoke box 40 and thence to the out- 7 letpipe section ll for discharge into a stack or the like. The cold air entering the pipe 7 contacts the firebox 9 and absorbs heat therefrom and is directed upwardly over the firebox and into contact with the

fines

31 and 37 and the smoke boxes above described, and when heated passes into the delivery pipes S for discharge at desired points. The gist of the present invention principally resides in the formation of the

fines

31 and 37 and the manner of supporting the same upon the firebox 9.

.Vhile there is herein shown and described the preferred embodiment of the invention, it is nevertheless to be understood that minor changes may be made in the form, combination and arrangement of parts Without departing from the spirit and scope of the invention as hereinafter claimed.

What I claim as new is 1. A furnace of the class described, comprising in combination, a tire box, an outer casing, horizontal fines leading from the rear wall of said firebox at a point adj acent the upper edge thereof, asmoke box located within said casing and connecting the ends of said fines, said smoke box positioned in spaced relation to the rear Wall and projecting upwardly above the plane of the upper wall of said fire box, a second smoke box detachably mounted on the upper wall of said fire box, a plurality of fines leading from the first named smoke box thereto; a third smoke box detachably mounted on the first named smoke box, a plurality of fines leading from the second smoke box thereto and a single flue leading from the last named smoke box.

2. A furnace comprising in combination. a fire box, an outer casing, a plurality-"of parallelly disposed horizontal lines leading from the rear wall of said fire box at points adjacent the u 3})61 edge thereof, a smoke box located within said casing and connecting the ends of said fines, said smoke box positioned in spaced relation to said rear wall and projecting upwardly above the plane of the upper wall of said fire box, means to secure said smoke box to the fire :box, an independently formed second smoke box detachably mounted on the upper wall of said fire box, a plurality of parallelly disposed fines leading from the first named smoke box thereto, a third smoke box detach'ably mounted on the first named smoke box, ahplurality of parallelly disposed fines leading from the second smoke box thereto; and a single flue leading from the last named smoke box, each of said smoke boxes located wholly within the casing, substantially as and for the purpose set forth.

3. A furnace of the type described comprising in combination a casing, air inlet and outlet means therefor, a firebox within the casing, a plurality of smoke fines arranged above said firebox in superposed relation independently formed, smoke boxes connecting the adjacent ends of said flues, means forming communication between the fire box and one of said smoke boxes, smoke outlet means connected with one of said smoke boxes, each of said smoke boxes comprising a pair of spaced plates bands arranged between said plates for holding the same in spaced relation, ears formed upon said smoke box plates, connecting means between said ears, connecting means between cooperating ears formed on the inner plates of the smoke boxes at the opposite ends of the fines, and a removable closure cap for one of said boxes lying in the path of travel of the air to be heated.

In testimony whereof I have hereunto set my hand.

JACOB HELMKEE.