US1146170A - Oven-roof. - Google Patents

Description

B. B. KAHN.

OVEN ROOF.

APPLICATION man NOV. 18, 1914.

V Patented July 13, 1915.

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IBERTBANID B. KAHN, OE CINCINNATI, OHIO, ASSIGNOR TO THE ESTATE STOVE COMPANY, OF HAMILTON, OHIO.

OVEN-ROOF.

Specification of Letters Patent.

Patented July-13, 1915.

Application filed November 18, 1914. Serial No. 872,676.

' Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Oven-Roofs, of which the following is a specification.

This invention pertains to improvements in the lining plates for the roofs of ovens in gas cooking stoves, and the invention will be readily understood from the following description taken inconnection with the accompanying drawing in which Figure 1 is a vertical section of a gas stove provided with my improved ovenroof, the section being in the plane of line b of Figs. 2 and 3; Fig. 2 a vertical section of the same in the plane of line a of Figs. 1, 3 and 4; Fig. 3 a perspective view of the lower plate of the improved roof; and Fig. 4 a vertical sectionof the lower plate of the improved roof in the plane of line 0 of Figs. 2 and 3.

In the drawing :1, indicates the outer Walls of an ordinary gas cooking stove; 2, the open main top thereof; 3, the opening in the main top to receive the usual grids on which cooking utensils may be rested; 4, the lining plates forming the oven side walls and disposed at some vdistance from the outer walls 1, so as to form flues at the sides of the oven; 5, the floor of the oven; 6, the oven burners disposed below the oven; 7, the floor of the main top chamber, the same being disposed below main top 2 and above the oven; 8, the oven roof-plate, the same being disposed below floor 7 of the main top chamber so as to leave a horizontal flue between. the roof of the oven and the floor of the main top chamber; 9, a pair of curved ribs struck up from the upper surface of oven roof-plate 8, their tops reach ing to the floor 7 of the main top chamber, these ribs being struck up from the metal of oven roof-plate 8 so as to produce thin walls for the ribs, the ribs extending fore and aft of the oven roof and having their forward ends near the front of the oven roof and somewhat separated and having their rear ends separated as far as possible consistent with the width of the oven roof; 10, apertures in the forward portion of the oven roof-plate, leading from the oven to the horizontal flue-space between the roofplate of the oven and the floor of the main top chamber; 11, the main top chamber formed between oven roof-plate 8 and the vmain top 3 and adapted for the reception of the usual burners for supplying heat to vessels placed on the main top; 12, the horizontal flue formed between the oven rooffor communication, preferably, with a chimney flue; 14, ahorizontal flue disposed between the oven burners'and the floor of the oven; 15, a fresh air flue leading to flue 14;

16, apertures in the front portion of the floorof the oven, placing the oven in communication with flue 14; 17, arrows indieating the course of the products of combustion from the neighborhood of the oven burners tothe horizontal, flue 12 between oven roof-plate 8 and the floor of the main top chamber;'and 18, the'vertical flues at the sides of the oven, extending from the region of the oven burners 6 to the horizontal flue 12.

All of the parts thus far referred to, with the exception of ribs 9, are or may be as usual in the construction of gas cooking stoves. The waste products of combustion from oven burners 6 follow the arrows 17 and go through flues 18 into the horizontal fiue'12 from whence they go tothe chimney outlet 13. These products carry a very considerable degree of heat. The products from the oven, resulting from the admission of air tothe oven through openings 16, leave the oven at openings 10 and go through horizontal flue 12 to the chimney outlet 13. These products from the oven contain some degree of heat.

Proceeding with the drawing :19 1ndicates a rib projecting from the top of the roof-plate of the oven, transversely of ribs 9 and having its ends at some distance inwardly from the inner surfaces of ribs 9, this rib 19 being struck up fromthe metal of the oven roof-plate so as to present a rib above the oven roof-plate and a recess below in communication with the oven.

The ribs 9 and 19 have a height such that they will make contact with the floor-plate 7 of the main top-chamber and prevent the passage of products over their tops, and the rear extremities of ribs 9 have such width that they will practically cut ofl communication between vertical flues 18 and-chinmey outlet 13.

The products rising from vertical flues 18 and entering the chamber 12 at the top of the oven will, having no other outlet, be deflected forwardly to the gap between the forward ends of ribs .9, and from this gap the products will move rearwardly and, being deflected by rib 19, will move sidewise and turn rearwardly around the ends of that rib and then find their way to chimney outlet 18. These products from the oven burners, carrying a very considerable degree of heat, will thus be caused to spread themselves over substantially the entire upper surface of the roof-plate of the oven and heat the metal of that roof-plate and cause heat to be radiated downwardly into the oven, and, owing to the thinness of the walls of ribs 9 and 19, the interior surfaces of these ribs also radiate heat downwardly into the oven. And it is so, also, with the products rising from the oven through openings 10, and while those products may carry a small degree of heat compared with the amount of heat carried by the products rising from the oven burners, if there be in these products from the oven a degree of heat in excess of thatin the oven, heat will act on the roof-plate of the oven, and be radiated downwardly into the oven and the struck up ribs 9 and 19, serving in deflecting these products from the oven, will, owing to the thinness of their walls, also aid in conveying heat to the oven.

The superior capacity of the ribs 9 and 19 to pick up heat from the products passing rearwardly through horizontal flue 12 and radiate heat downwardly into the oven is due to the thinness of the walls of those ribs, and the struck up character of the ribs provides not only for the thinness of the walls of the ribs, but for the openings in the oven roof-plate which permit the free downward radiation of heat from the thin walls, the construction thus obviously avoiding the necessity for providing especial openings in the roof-plate of the oven to permit radiation from the inner surfaces of the ribs to the interior of the oven.

1 claim 1. An oven-roof comprising, a plate forming the floor of a main top chamber, an oven roof-plate disposed below said floor-plate to form a horizontal flue adapted for connection with a chimney-outlet, hollow defleeting ribs projecting up from the oven roof-plate and having their crests in engage-- ment with said floor-plate, the bases of said ribs being open to the oven-space below the oven roof-plate, combined substantially as set forth.

2. An oven-roof comprising, a plate forming the floor of a main top chamber, a sheet metal oven roof-plate disposed below said floor plate to form a horizontal flue adapted for connection with a chimney outlet, hollow deflecting ribs having their sides and ends struck up from the oven roof-plate and having their crests engaging with said floorplate, the bases of said ribs being open to the oven-space below the oven roof-plate, combined substantially as set forth.

BERTRAND B. KAHN.

Witnesses:

M. S. BELDEN, G110. JOHNSON.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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