US1681726A - Heater - Google Patents

Description

Aug. 21, 1928.

S. R. DU BRIE f HEATER Filed MaIGh 21, 1928 61.17101 uc if:

Patented Aug. 21, 1928.

UNITED g srArEs STANLEY a. nu BRIE, or' GROSSE POINTE raux, MICHIGAN.

HEATER.

Application led March 21, 1928. Serial No. 263,354.

The present invention pertains to a novel hot air furnace or heater constructed particularly for use in connection with oil burners, although any other suitablesource of heat may be employed.

The principal object of the invention is to rovide a device of this character wherein the incoming air will be etliciently brought into contact with the hotter parts of the ues through which the hot gases are caused to pass. This object is accomplished by providf ing a series of spaced parallel ilues and inserting in the spaces battle members which conduct the circulating air to the hotter parts of these spaces. Inasmuch as these hotter parts are the central parts of the spaces, the bailles are arranged to obstruct the ends ot the spaces but to leave clearance intermediate the ends, this clearance increasing in size towards the center of the spaces. As a result of this construction the greater part of the circulating air is caused to lo'w along the center of the spaces, and in diminishing amounts at the ends of the spaces.

The invention is fully disclosed by way of example in the following description and in the accompanying drawing, in which- Figure l is a transverse vertical section of a heater constructed according to the invention' Fig. 2 is a vertical section at right angles .to Figure 1;

Fig. 3 is a horizontal section on the line 3-3 of Figure 1; and

Fig. 4 is a similar section on the line 4-4 of Fi re 1. Reference to these views will now be mad by use of like characters which are employed .to designate .corresponding parts throughout. The heater comprises a base 1 on which is mounted a casing 2 in the usual manner. On the base and within the casing is provided a re box 3 spaced as at 4 from the walls of the casing and having a door 5 through which may be passed piping leading to an oil burner not shown). The hre box has a top plate 6 ormed with parallel slots 7 On the plate 6 is arranged a series of parallel flues 8 registering with the slots and extending upwardly in zigzag fashion, whereby a large area is presented for the radiation of the heat carried by the gases passing from the fire box into the vlues. The upper end of each llue is fitted with a cap 9, and the several caps lead into a header 10 through which the exhausted products ofcombustion are led to the atmosphere.

At the lower end of the casing 2 and adjacent the lire box 3 is an air inlet pipe 11 through which fresh air is charged into the casing. This air is heated by the lues 8 and 1s thus raised to the top of the casing. At the top of the casing is built a manifold 12 having a plurality of outlet ports 13 to which may be connected pipes leading to various points at which hot air is desired, The important feature or' the invention is the baille system which is comprised of a pair of baille plates 14 supported in a horizontal plane slightly above the fire box by means Of lugs 15 extending from the ends of certain of the lues. 'lhese plates are laid along the ends ol the llues and provide substantial spaces 16 adj acont the outermost lues as clearly shown in Fig. 3. Batlle tongues or lingers 17 extend from the plates into the spaces 18 between the flues. These members reach substantially to the mid points of such spaces and diminish in width in the direction of their free ends. Their wider ends which are integral with the plates 14 substantially close the ends ol' the spaces 18, whereby the clearance retained in the spaces 18 increases in width from the ends of the spaces towards the center thereof. Due to the fact that there is a similar construction at each end yof the spaces whereby the lsmaller ends of the fingers v17 are mutually-juxtaposed, the' maximum clearance is located at the central part of the spaces 18, gradually diminishing towards the ends thereof.

It will now be apparent that the air admitted at the inlet 18 and raised by being heated over the tire box must pass through the clearance between the baille lingers 17 and the Walls of the tlues 8. Due to the peculiar shape of these clearances as already described, the major portion of such rising air is concentrated at the hotter parts of the ilues, namely the central parts where the clearances have their maximum area. The diminishing area of these clearances towards the ends of -the llues permits the outer parts of the lues to be engaged by a volume of air commensurate with the amount of heat capable of being radiated thereby. In this manner the elliciency of the system is greatly improved by bringing the fresh air into contact with various parts of the llues in volumes proportionate to the amount of heat available at such arts.

Alt ough a specific embodiment of the invention has been illustrated and described, it

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will be understood'that various alterations in the details of construction may be made without departing from the scope of the 1nvention as indicatedby the appended claims.I

WhatI claim is f 1. A heater comprising a casing, a fire box therein, lues communicating with said fire box and extending upwardly into said casing, an air inlet to the casin and bafflesl between said ues, said bales c osing the spaces bee tween the ues at the ends of said spaces and 3. A heater comprising a casing, a iire box therein, flues communicatin with said fire box and extending upwardly lnto said casing an air inlet to the casing', and bales disposed in a horizontal plane above said fire box, said baliles closing the spaces between the lues at the ends of said spaces and leaving clearance intermediate said ends.

4. A heater comprising a casing, a re box therein, lues communicating with said fire boxand extending upwardly into said casing, an air inlet to the casing, and baillesl disposed in a horizontal plane above said fire box, said bales tapering inwardl Y from the ends ofy the spacesbetween said ues.

5. A heater comprising a casing, a firebox therein, fines communicating with said fire bo'x and extending upwardly into said casing, an air inlet to the caslng, a pair of baffle plates at the ends of said ues, baille fingers extending from said plates into the spaces between the flues and as far as the center of such spaces, said fingers closingv the ends of said `s aces and tapering towards theiree ends i ereof.

In testimony whereof I aix m signature.

STANLEY R. 13% BRIE.

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