US604552A

US604552A - Hot-air furnace

Info

Publication number: US604552A
Authority: US
Publication date: 1898-05-24
Anticipated expiration: 1915-05-24

Description

(No Model.) 4 Sheets-Sheet l.

H.A.TINKHA1VI.

HOT AIR FURNACE.

No. 604,552. Patented 'May 24,1898.

me mums versus cu. Hom-uwe., wAsmNcToN, n c.

(No Model.) 4 `Sheets-Sheet 2. H. A. TNKHAM.

HOT AIR FURNAGE. No. 604,552. Patented May 24,1898.

we Nonms Evans co, pHoro-uwe.. wAsHmTfw, n. a..

(No Model.) 4 Sheets- Sheet 3.

H. 4A; HNKHAM. HOT AIR FURNAGE.

No. 604,552. Patented May 24,1898.

"Hummm 1@ 3.

(N Model.)

H. A. TINKI-IAM. HHOT AIR PURNAGE.

Patented May'24,1898.

I 11 ll. M0 -..HH I

Unirrnn S'rarns Farnwr Camion.

IIO'WARD A. TINKHAM, OF NORTON, MASSACHUSETTS, ASSIGNOR TO THE VHITE VARNER COMPANY, OF TAUNTON, MASSACHUSETTS.

HOT-AIR FURNACI.

SPECXFICATION forming part of Letters Patent No. 604,552, dated May 24, 1898.

Application filed November 8, 1897. Serial No. 657,746. (N0 model.)

.To all whom it may concern:

Be it known that I, HOWARD A. TINKHAM, a citizen of the United States, residing at Norton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following, taken in connection with the accompanying drawings, is a specification.

One of the objects of my invention is to make a hot-air furnace having an auxiliary at the end thereof.

In the drawings, Figure 1 is a vertical section from front to rear of a furnace embodying myinvention, the outside casing and some other unessential parts being omitted. Fig. 2 is a horizontal section on line 2 2 of Fig. 1. Fig. 3 is a perspetive, partly broken away, of a furnace embodying my invention. Fig. 4c s a detail perspective of the diaphragm of the auxiliary radiator. Fig. 5 is a plan of the plate forming the bottom of the auxiliary radiator. Fig. 6 is a section on line 6 6 of Fig. 5. Fig. 7 is a front elevation showing the dust-hue connection between the ash-pit and the auxiliary radiator.

My invention -is represented as applied to a portable hot-air furnace, in which 1 is the main radiator,inclosing the lire-chamber, and 2 is the outside supplemental or auxiliary radiator. This auxiliary radiator is of the type commonly called the horseshoe form-that is, it partially surrounds the main radiator and there is an air-space between the two radiators. The auxiliary radiator is sup- It is also supported at the rear by the smoke-flue where it enters the chimney. Rods 6 connect the plates 21, which form the top and bottom of the radiator. A connecting-collar 7 between the main radiator l and the auxiliary radiator 2 forms the only flue between the two radiators. This flue is preferably midway of the curve of the radiator and opposite the feed-door. Preferably also for convenience it is composed of two sections end to end, lapping onto each other. The auxiliary radiator is divided into an upper and lower chamber bya diaphragm which does not extend quite to the front ends of the radiator, so that there are passageways between the two chambers at the forward ends of the arms of the diaphragm. This diaphragm is preferably the full width of the radiator and made to dip downward from each side of the flue toward the front for purposes which will be explained hereinafter. For convenience of construction and of setting in position the diaphragm is composed of two of said arms or plates 8,Which form the deflecting portion, bolted to a middle portion 9, which is of trough shape with inclined or bevel bottom. .This trough leads from the auxiliary radiator directly to the draft-collar 10. Secured to this middle portion 9, preferably by bolts or screws, is a rearwardly-extending plate 11, which projects into the draft-collar 10 and extends widthwise to the sides of the collar. Directly at the rear of the plate 11 there is a draft-damper 12, which when closed closes the passage on the upper side of the plate 11,whereby the draft maybe made direct or indirect, as desired. The plate 11 has an upwardly-proj ectin g lip 13, against which the damper 12 strikes when it is closed. The diaphragm is supported at the middle partly by the plate 11, resting on flanges 14, which project inwardly from the sides of the draftcollar 10, and partly by the inner ends of the deflecting-plates 8, near the union with the bevel-plate 9, resting on lugs 15, which project from the collar 43 around the draft-opening on the inside of the inner wall of the auxiliary radiator. The deflecting-plates 8 have ears 16 on their outside edges near the ends. Bolts 17 pass through holes in these ears and through the wall of the auxiliary radiator and hold the plates 8 in position. The dia- IOO ` and a new plate can with equal facility be substituted. The outside collar 18, to which the smoke-pipe is connected, is pinned to the collar 10, and by disconnecting the said collar 18 the

plates

9 and 11 can be readily detached and taken out, making easy access for repairs and for cleaning the furnace. The deflecting-plates extend nearly but not quite to the ends of the arms of the auxiliary radiator' 2, being sufiiciently short to allow for' the circulation around the ends. The arms also extend downward to a short' distance fromthe bottom. The combined sectionalE area of the passages at thel ends of both deflecting-plates should be about equal to the sectional area of the passage to the indirect outlet to the draft-collar, where .the twocurrents meet, to secure the best results.

Vhen the damper 12 is open, the draft Y will be direct from the combustion-chamber ofthe deiiecting-plates S into the lower chamber, thence returning to the rear part ofthe radiator and rising, the currents from both arms uniting on the under side of the bevelplate 9 and passing together out through the draft-collar 10 on the under side of the plate 11, and thence out through the collar 18 the same as did the direct draft.

By giving the deiiecting-plates avdownward dip the products of combustion are compelled to circulate throughlall parts of the radiator fromtop to bottom. As the products from the combustion-chamber have a tendency on their returncourse to hug the under side of the diaphragm, if the radiator be quite deep the currents will not reach the bottom part'v of the ylower chamber, and therefore the radiator will not be-evenly heated. By dipping the diaphragm the current is compelled to take a curve which carries it down into the lower forward ends of the radiator before it canA return, and in this way a considerablydeeper auxiliary radiator can be employed thanwhen the deflector is horizontally disposed, and the radiator will be more evenly' diator is composed of sheet-iron or sheet-steel, which being bent around into the horseshoe form and doubling upon itself at the ends is very springy. The top and bottom plates, which are exactly alike, are made of cast metal, having a iiange 22, which extends entirely around the margin of the plate and which -on the bottom plate forms the rest for the side walls of the radiator and which on the top plate rests on the upper edges of the walls of the radiator. For convenience of description I shall speak of the bottom plate particularly. In order to hold the side walls in place and in form, a lip 23 rises from the ian ge 22 along its inner periphery at the edge thereof, and a lip 24 rises from the iiange of the outer periphery, but back from the edge. These lips, it will be noticed, lap by each other at the ends. If the radiator were a complete circle or cylinder, like a stovepipe, then Lthe lip might be continuous and the iange projecting outward all the way around, so that the cylinder would set outside of the lip just asa stovepipe is connected with its collar by setting it outside the Iiange or lip.

By reason of the peculiar action of the sheet metal when made in the horseshoe form it is found that if the lip were all inside the strain and pressure to which the radiator isV subjected in setting it up and driving it on will spring it out of form and alter its shape, as.

yif the two arms are pressed toward each other ,the tendency is for the inner and outer walls to spread in opposite directions. By making -the lips in the manner described above the iouter periphery or wall of the radiator goes outside of the lip 24said lip also being car- Iried around past the bend at'the ends. The linner wall of the-radiator is inside of the lip 23.

What I claim is* 1. In ahot air furnace, in combinationwith ',the main radiator, an auxiliary radiator' outside of the main radiator, an air-space between the outside wall of the main radiator yandthe inside wall of the auxiliaryradiator,

a diaphragm dividing the auxiliary radiator into an upper and a lower chamber, with a passage between said chambers at each'end `thereof,a single cross-due connecting the main radiator with said upper chamber midway of IOO IIC'

the ends ofsaidchambera single outlet-nue* for both chambers midway of the ends thereof,` :a plate extending from the diaphragm part ,way into said outlet-flue, and a damper for the portion of the iue above said extensionvplate, substantially as described.

v 2. In a hot-air furnace, in combination with the main radiator, an auxiliary radiator outjside of the main radiator,l an air-space be- @tween the outside wall of the mainl radiator @and the inside wall ofthe auxiliary radiator,v

ga single cross-Hue connectingthemain radiator with said' auxiliary radiator midway of the ends thereof, asingle outlet-fine for the lauxiliary radiator opposite the inlet-huev and tof larger sectional areaa bevel-plate extending crosswise of the auxiliary radiator from the lower edge of the inlet-flue to about midway of the outlet-opening, diaphragm-plates extending from both sides of said bevel-plate toward the ends of the auxiliary radiator dividing said radiator into an upper and a lower chamber with a passage between them at each outer end thereof, a plate extending from the bevel-plate into the outlet-Hue and a damper for the portion of the flue above said extension-plate, substantially as described.

3. In a hot-air furnace, in combination with the main radiator, an auxiliary radiator outside of the main radiator, an air-space between the outside wall of the main radiator and the inside wall of the auxiliary radiator, a single cross-flue connecting the two radiators midway of the ends of the auxiliary radiator, an outlet-Hue from the auxiliary radiator, a bevel-plate with side walls extending crosswise of the auxiliary radiator the full width thereof from the lower edge of the inletiiue to about the middle of the outlet-opening, diaphragm-plates extending from the upper edge of both side walls of said bevel-plate toward the ends vof the auxiliary radiator dividing it into an upper and a lower chamber with end passages, and a damper for that portion of the outlet-fine above the bevel-plate, substantially as described.

4. In a hot-air furnace, an auxiliary radiator,an inlet-line intermediate the ends thereof, an outlet draft-opening and collar connection, a diaphragm which divides the said radiator into an upper and a lower chamber with passage-ways between the chambers at the ends thereof, said diaphragm comprising a bevelbottomed plate which forms the middle piece and two deflecting-plates detachably secured to the middle piece and extending toward the ends of said radiator, a plate detachably secured to said bevel-plate and projecting into the draft-opening dividing it crosswise, a damper above said plate for the upper portion of the draft-collar, and a support for the diaphragm and plates, substantially as described.

5. A top and bottom plate for a segmental radiator consisting of a segmental plate, an upwardly-projecting lip around the inner periphery, an outwardlyextending ange around the outer periphery and around the ends, and an upwardly-projecting lip around inside of said flange, said second lip extending around the ends inside of the flange and past the ends of the inner lip, the two lips being spaced apart at their passing-points to admit the wall of the radiator, substantially as described.

In testimony whereof l have signed my name to this specification, in the presence of two subscribing Witnesses, on this 5th day of November, A. D. 1897.

HOWARD A. TINKI-IAllL Witnesses:

EDITH J. ANDERSON, WILLIAM A. COPELAND.