US1196973A - Baffle for gas-heaters. - Google Patents

Description

T. 6. PALMER. BAFFLE FOR GAS HEATERS. APPLICATION FILED APR. H, 1916.

1,196,978 Patentedfi ept. 5,1916.

TRUMAN Gr. PALMER, OF CHICAGOILLINOIS.

BAFFLE FOR GAS-HEATERS.

Specification of Letters Patent.

Patented Sept. 5, 1916.

Application filed. April 11, 1916. Serial No. 90,432.

To all whom it may concern Be it known that I, TRUMAN G. PALMER, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Bafi les for Gas-Heaters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to gas heaters and has for its object to provide an improved.

form of bafiie especially designed for use in a gas heater of the type disclosed in my prior Patent No. 1,125,387, of January 19, 1915. i

Inits preferred form, the baffle comprises a helical coil of wire wound upon a central support disposed in co-axial relation with the coil of wire, the central support being of such characteras to cause the helical coil of wire to take the form of a series of substantially conical spirals. In this way, nearly all of the successive turns of the wire may "be made of different diameter, and thus all of theturns' in conj unction serve to constitute a heating element, all parts of which are thoroughly and efficiently heated as the flame'rises from the bottom to the top of the bafiie. Ifdesired, both the central support and the coil of wire wound thereupon may serve as heating elements, as both of the same come'into direct contact with the flame and hot gases from'the heater.

The preferred form of the baffle is illustrated in the accompanying drawing, in which':

Figure 1 is a side elevation of the baflie as it appears when removed from the heating shell in which it is intended to be positioned; Fig. 2 is a side elevation showing the improved baffle positioned within the heating shell above mentioned; and Fig. 3

is a horizontal section through the baflie taken on the line 33 of Fig. 1.

The central support for the coil of wire is shown at 1' and may be constructed in various ways and take various shapes, but preferably it is constructed as shown in the drawing. It is formed of two flat strips of appropriate material, preferably metal, each strip having relatively large V-shaped openings 2 rovided along e g p rt n and other substantially rectangular openings 3 provided in its central body portion. Each of the two strips so formed is'bent along its longitudinal axis, 'as shown in Fig. 3, to form two wing-like portions 4 forming an angle between them of substantially 90. The two strips are then secured together at their central portions by rivets or other suitable fastening devices 5, thus forming a skeleton supporting member having four radially-disposed vane-like portions 4. When the strips are securedtogether, they are so positioned that the central rectangular openlngs 3 of one stripwill register with those of the other strip, and the V-shaped openings 2 'in one strip will 'be in circular alinement with the corresponding V-shaped openings of the other strip. The rectangular open ings 8 and the V shaped"openings 2 should be so disposed and so related that when the strips are bent and secured together, a skeleton support will be formed having a plurality of successively'diverging and converging narrow strips, over the edge portions of which, the coil of wire maybe wound. The helical coil'of wire above referred to is indicated at'6 and is wound over the exterior edges of the skeleton support. In order to prevent the turns of wire from slipping, the

outer edges of the vane-like portions 4 of the support are provided with a plurality of notches 7 to receive the turns of wire and tohold them in place. As best shown, in Fig. 1, one end 8 of the length of wire may be secured to one end of the support and the length of wire then wound over the outer edges of the support, the turns being positioned in the notches 7 in such a manner that the coil takes a helical form, in that the turns advance toward the other end of the baffle. The other end 9 of the length of wire may be so bent as to hold the same in place,

as clearly shown in Fig. 1. The V-shaped crease in diameter and then the adjacent" group of turns of wire will successively 1ncrease in diameter. This isclearly shown in Fig. 1". It will be further-noted that the conical spirals of each pair taper. or converge in opposite'direct-ions. When the baflie is-to be used in combination with a heater of the type shown in the patent above referred to, it is positioned within a foraminous cylindrical heating shell shown in Fig. 2 at 10, substantially like that shown in the aforesaid patent. As the construction of the heating shell 10 forms no part of the present invention, it is sufficient for the present purposes to note only the upper and lower caps 11 and 12, respectively, for reinforcing and maintaining the cylindrical shape of the heating shell. If desired, the central support 1 of the bafile may be provided with several integrallyformed tongues 13, which may be bent over and secured to the top cap 11 in any suitable manner. The heating shell 10, together with the baffle positioned therein, constitute a heating unit which may be readily positioned in and removed from a heater of the type shown in my aforesaid prior patent and placed in co-axial relation with the burner of the heater in much the same manner as an ordinary lamp chimney is positioned. The flame and hot gases passing co-axially through the heating shell 10 come in direct contact with the battle. Both the central support and the coil of wire wound thereupon are heated and radiate their heat to the compartment in which the heater is positioned. The Vane-like portions of the a central support and also the successive turns of wire serve to effectively divide the flame and hot gases passing through the heating shell to cause all parts of the battle to be thoroughly heated. As most of the turns of wire successively increase or decrease in diameter, it is obvious that all of the turns will not be in vertical alinement, as would be the case if the coil were wound upon a smooth cylindrical surface, but most of the successive turns of wire are offset in a horizontal direction, so that the turns of wire are distributed over the cross sectional area of the flame and hot gases rising through the heating shell, as will be clear from Fig. 3. This, of course, is due to the fact that the turns of wire form a plurality of conical spirals.

The radially-extending vanelike portions 4 of the central support not only serve as a core upon which the coil is wound, but also serve to properly position the coil within the heating shell. For. this purpose, the vanes 1 extend in a radial direction, such a distance that the baffle may be readily posi tioned within the heating shell, and when so positioned, the extreme edge portions of the vanes will contact with the inner surface of the heating shell to hold the battle in its central position. The V-shaped openings 2 are preferably so positioned and of such size as to leave flat and unpointed portions 14 along the edges of the vane-like parts 4, so as to facilitate the positioning and removal of the bat e with respect to the heating shell- It is obvious that when the heating shell is made of foraminous material, the existence of sharp corners where the flat edges 14 are shown would be objectionable, as the baffle would then be more diflioult to position and remove and the baffle would not be as ef fectively held in its co-axial relation with respect to the heating shell.

Although the preferred sequence of steps in constructing the battle and the preferred shape and disposition of the openings have been described, it is obvious that a baflie having the same shape as that shown in the drawing, or a different shape, may be formed in a different manner, and, therefore, I do not wish to limit myself to the specific manner of forming the baflie or to the specific shape and construction thereof. Many changes in the details of construction may be made without departing from the spirit of the invention, as defined in the accompanying claims.

What I claim is 1. A baflle for gas heaters comprising a central skeleton supporting member and a length of wire wound upon said member to form a plurality of adjacent substantially conical spirals.

2. A battle for gas heaters comprising a central supporting member having radiallyprojecting vane-like portions, and a coil of wire wound over the outer edges of said vane-like portions.

3. A baffle for gas heaters comprising a central supporting member having radially-projecting vane-like portions disposed substantially at right angles to each other, and a coil of wire wound over the outer edges of said vane-like portions.

4. A baflie. for gas heaters comprising a central supporting member having radially-projecting vane-like portions, said vanelike portions being provided along their edges with a series of substantially \l-shaped openings, and a coil of wire wound over the outer edges of said vane-like portions.

5. A baffle for gas heaters comprising a central supporting member having a plurality of radially-projecting vane-like portions having a plurality of notches along their edges, and a coil of wire wound over the outer edges of said vane-like portions with the turns of wire positioned in said notches.

6. A baflie for gas heaters comprising a central supporting member made up of two strips of metal, each bent along its longitudinal axis, the strips so formed being secured together at their central portions to form a central supporting member having a plurality of vane-like portions, and a coil of wire wound over the outer edges of said vane-like portions.

7. A bafiie for gas heaters comprising a central supporting member made up of two strips of metal provided along their edge portions With a series of V-shaped openings, said strips being bent along their 1ongitudinal axes and secured together at their central portions to form a supporting member having four radially-projecting vane-like portions With said V-shaped openings in circular alinement, and a coil of Wire Wound over the outer edges of said vane-like portions.

8. A baflie for gas heaters comprising a central supporting member and a length of Wire Wound upon the same to form a substantially conical spiral.

In testimony whereof I aflix my signature.

TRUMAN G. PALMER.

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

Washington, I). G.

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