US1681428A - Fin-type air heater - Google Patents

Description

Aug. 21, 1928.

1,681,428 o. w. OTT

FIN TYPE AIR HEATER Filed May 28, 1927 j Mw Patented Aug.4 21, 192s.

- UNITED STATES PATENT oF GRAIN' W. OTT, 0F LOS ANGELES, CALIFORNIA.

FICE.

FIN-TYPE AIR HEATER.

Application filed May 28,

the embodiment ofthe invention illustrated in cthe drawings, is adapted for the use of the gaseous form of fuel.

An object of the invention is to make provision for a relatively large area of metal to absorb and radiate the heat.

In order to utilize the heatingvalue of fuel to as great a degree as possible, I provide a large number of fins to absorb the heat and radiate the same into the air passages formed by the inter-fin spaces. I provide a number 0f ilues and fins' radiating from said lues, the

metal that forms the iiues and fins being in contact so that the heat will be readily conducted from the iiues to the fins for radiation by said fins.

The flues and fins are constructed of sheet metal of any suitable character.

A very important object of the invention is economy in the use of fuel.

Another important. object is lightness s0 that the heater can be easily moved from place to lace.

ther objects and advantages will appear inthe subjoined detailed description.

The accompanying drawings illustrate the invention.

f Figure 1 is a perspective view of a fin type air heater constructed in accordance with the provisions of this invention.

Figure 2 is a perspective view of those elements of the heater that are positioned 1nside of the housing orbody.

Figure 3 is a plan view of the heater, th grating top being omitted. t

Figure 4 is a fragmental-detall, partly 1n section on the line indicated by 4--4, Figure 3.

Figure 5 is an elevation, partly in section, from the line indicated-:thy 5 5, Figure 4, the upper end of one of the plates being shown as well as the lower end thereof and a portion of said plate being broken away to contract the view Figure 6 is a sectionalgdetail view similar toFigure 4 showing a modification of the plates.

Referring to the drawings, there isprovided a series or bank of flues, each Hue being indicated in its entirety by the character 11. In this particular instance, each iiue comprises a pair of oppositely disposed channel- 1927. Serial No. 194,987.

shaped members 12, the iianges 13 of each of said members being turned away from the flanges of the other member. The iiues are partly formed by plates which, in some instances, are interposed between adjacent pairs ofthe members 12 and, in other instances, are

at the outer ends of the endmost pairs of members 12. The plates just referred to have intermediate portions `14 constituting two of the walls of the flues 11, and said plates also have marginal portions 15 that form fins. In this instance, the walls 14 and fins 15 are integral but it is readily understood that they could be of separate construction. The walls 14 and fins 15, with the exception of the two end ones, are interposed between the flanges 13 of adjacent members 12 and are, in fact, clamped between said flanges, by a suitableA means, as, for example, bolts or-rods 16 which pass through holes 17 in the iianges 13 and through holes 18 in the plates. The rods 16 are screw threaded at their opposite ends as indicated at 19 and the endmost plates are in# terposed between the end flanges 13 and eye 32 on the rods 16. Engaging the screw threads 19, at each end of each rod, is a nut 21, which, when turned up tight, securely clamps the members 12 and the plates together. t

The iiues 11 are positioned upright and each plate has at its lower end a slot 22 to permit of a burner support 23 extending through said slots, as clearly shown in Figure 4. The burner support 23 has a bottom 24, end walls 25 and side walls 26. In this instance, the burner support- 23 extends through thelower portions only of the slots 22 so that there is a continuousopen space over the burner support 23. A burner 27 is positioned in the support 23 and said burner is spaced a Vdesirable distance from the plates so that there is no danger of' burning out said plates.

Suitable means is provided for-'supporting' the burner. support 23 above the level of the :Floor on which the heater is to rest. and, in this instance, said means comprises a pair of eye bolts 28 at each end of the support 23 and the lower ends of each pair of bolts 28 pass through a cross member 29, being secured to said cross member by-nuts 30 positioned above said `cross member and nuts 31 positioned beneath said cross member. The cross members 29 extend transversely oi' the burner support 23 and said burner support rests upon said cross members. The rods 16 pass through the eye 32 of the eye bolts 28 and. they also pass through holes 33 in the end walls 34 of a housing or body which is indicated in general b the character 35. The body 35 also compr1ses side walls 3G. In this instance, the body is rectangular and has at its corners supporting legs 37. The end walls 34 are clamped in place on the rods 16 by nuts 36 which are screwed on the threaded portions 19 ot' the rods. The end walls 34, side walls 36 and legs 37 are all secured together by any suitable means well understood in this art. For example, they may be welded.

The body 35 also comprises a grating top 39. Fuel is supplied to the burner 27 through a pipe 4() which connects at one end to said burner. The other end of the pipe 40 is provided with an air mixer 41 and a valve 42.

The construction and operation of the invention will now be apparent and, in brief, the operation is as follows: Assuming that the fuel has been lighted at the burner 27, the hot combustion gases pass upwardly through the flues 11 heating the thin walls of said flues. The heat is rapidly conducted away from the flue walls by the fins 15 which, as is clearly seen in Figure 3. preferably are spaced from the side 'alls 36 so as to avoid heating said side walls. The heated fins 15 radiate heat into the inter-fin spaces 43, thus heating the air within said spaces, causingT said air to rise and flow through the grating top 39. Cooler air from the floor of the room flows upwardly into the body 35 from the space therebeneath, since said body is open at its bottom.

It will be readily understood that the body 35,1nay, if desired. be omitted and the remaining parts of the heater supported above the floor level by any other suitably constructed support.

The elements that are the functional equivalents of those already described are indicated by the same reference characters with the addition of the letter a. The only difference between the plates in Figure 6 and those in Figure 4 is that the plates in Figure G have laterally bent flanges 44 positioned at the upper margins ot the slots Q2. In this instance, the flanges 44 extend aslant downwardly and outwardly from their fixed ends to their free ends and the free ends extend into the slots of adjacent plates. The purpose ot the flanges 44 is to obstruct View of the flame to an observer looking downwardly through the grating top 39. The flanges 44 extend across the flues and the free ends of the flanges are spaced sufliciently from adjacent flanges to permit the gases of combustion to pass between adjacent flanges into the flues.

I claim:

1. A. lin type air heater comprising a. series of upright lues, two of the walls of each flue being formed of channel-shaped members, fins projecting from the flanges of the channel-shaped members, and a gas burner positioned beneath the flues. y

Q. A fin type air heater comprising a series of upright flues, two of the walls of each flue being formed of channel-shaped members, fins projecting from between the flanges of the channel-shaped members, and a gas burner positioned beneath the flu es.

3. A lin type air heater comprising a series of upright flues, two of the walls of each flue being formed of channel-shaped members, the intermediate portions of plates forming two other walls of each flue. all but the end plates extending between adjacent flanges of the vchannel-shaped members, marginal portions ofthe plates forming outwardly projecting fins, and ay gas burner positioned beneath the flues.

4. A fin type air heater comprising pairs of spaced channel-shaped members in upright position, plates between adjacent channelshaped members, rods passing through the flanges of the channel-shaped members. means on the rods to force the channel-shaped members toward one another, and a gas burner positioned beneath the flues.

5. A fin type air heater comprising pairs of spaced channel-shaped members in upright position, plates between adjacent channelshaped members, marginal portions of the plates forming outwardly projecting fins, rods passing through the plates and through the flanges ot' the channel-shaped members, means on the rods to force the channel-shaped members toward one another, and a gas burner positioned beneath the flues.

6. A fin type air heater comprising a series of upright flues, two of the walls of each flue being formed of separate members and the wall ot each two adjacentflues being formed by a plate, marginal portions of said plat/es projecting outside of said first mentioned walls to form heat radiating fins, and a gas burner positioned below the level of the flues.

7. A fin type air heater comprising a series of upright flues, two of the walls of each tlue being formed of separate members and the wall of each two adjacent flues being formed by a plate, marginal portions of said plates projecting outside of said first mentioned walls to form heat radiating fins, a housing extending around the flues, and a gas burner positioned in the housing below the flues.

Signed at Los Angeles, Calif., this 19 day of May, 1927.

CRAN 1V. OTT.

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