US705422A - Hot-air heater. - Google Patents

Description

No. 705,422. Pamn'ced .luly 22, |902.

M. B. MOORE & G. W. LEDDON.

HOT AIR HEATER. (Appnemon ma am. 15, i902.)

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l Patented Ju'ly 22, |902.

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No. 705,422. Patented 'July 22, |922.

' m. B.. Moerman. w. Lennon.

HOT AIR HEATER.

(Application med nu. 15, 1902.) (lo lvodnl.) 3 Sheets--Sheet 3.

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MOSES B. MOORE, OF PENNING'ION, NEXV JERSEY, AND GEORGE W. LEDDON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE PENNINGTON FOUNDRY AND HEATER COMPANY, OF PENNING CORPORATION OE NEW JERSEY.

HOT-AIR SPECIFICATION forming part of Letters Application iled March 15, 1902.

To all whom t nto/,y concern;

BeitknownthatWe,MOsEsB.MORE,resid ing in Pennington, New Jersey, and GEORGE W. LEDDON, residing at Philadelphia, Penn- Sylvania, citizens of the United States, have invented certain Improvements in Hot-Air Heaters, of which the following is a specification.

Our invention has for its object the-provi- Io sion of a hot-air furnace which shall lloe of a simple construction, efficient in action, and easy to operate. Thisobject We attain as hereinafter set forth, reference being had to; the accompanying drawings, in which- Figure 1 is a vertiealsectional viewof our improved furnace. Fig. 2 is a horizontal sectional view on the line 2 2, Fig. l; and-Fig. 3 is an Outside view of the innermost casing, portions of the outer casing being removed for the clearer illustrationof said inner casing. In the above drawings,Ais vthecircularbase of the heater, preferably of cast-iron, upon which is a rectangular ash-box B, itsv backI plate being shown in sectionY in Fig. lV at 00 and carried by and preferably formed lintegral with the sides of the ash-box is afplate h, extending inwardly around the topedge thereof and forming the support for theii'rebrick lining h2 and the grate b, a rectangular opening being formed in the front of the ashbox and a frame b4 Iextetiding forwardly around said opening and forming aldoorway4 thereinto. V

Preferably made integral with the ash-box' and running around its back and two sides is a smoke-.line C, connecting with the smoke pipe or stack C at the back of the heater through a horizontal pipe c, said line extending around the ash-box B, its forward ends 4o nallyi'ntersecting the frame h4, which forms the entrance into the ash-pit and is provided with doors h3, whereby access may be had to the interior of said Hue.

Resting upon the top surface of the smokelue C are three-.corrugatedsections E, forming the back and two vsides of the re-box of the heater, the front being formed by a flat plate E, provided with a projecting ex- *ofthe products of co TON, NEW JERSEY, A

HEATER.

Patent No. 705,422, dated July 22, 1902.

serai No. 98,372. (No man tension e, forming a box-like frame of rec- 'tangularsection'which serves as the fuel-door- 5o Way',

The top ofthe smoke-flue C is formed With a number of openings, corresponding in outline tothe.V outline-of the corrugations of the side and back sections E, which rest upon said flue, and there are a number of plates czsuitably fastened to the fronts of these corrugations and extendingto thetop of the sections E. There are thus formed iiues which are in Vcommunication with the interior of the o smoke-'line G at each side and at the back of the fire-box.

A cover;or dome section 'F is provided, which rests d-irectly upon and corresponds in outline to the three side and back sections E 55. and the front section E of the heater, its sidesand back being made corrugated, and thereby forming entrance-Ways or openingsf z"to the vertical lues formed by the plates c2 and the corrugations in the side and back sec- 7o tions*v E. This dome-section lis conned to the rectangular fire-box in any suitable Inanner, and there is an opening f in its top surface,to which is connected a pipe f2, commu- ,nicating with the main smoke-stack OQ there being a damper f3 for controlling the passage mbustion through said pipe.

We preferably form the ash-box, the sections of the fire-box, and the domeabove de- 8o scribed of cast-iron.

Closely surrounding the casing formed byv the sections'of the fire-box is a second casing G, of galvanized iron, this casing being carried by a ring b5 and extending to the same 85 height as that of the sections E. It is to be understood that thetop surface of the smokeiiue C has in it a number of depressions at c3 c3, as shownin Fig. 3, and inasmuchasthe casing G does not extend below the `level of 9o the top of the smoke-boxe thesedepressions c3 form a number of entrances jor-openings into the vertical passage-Ways formed by the outwardly-opening corrugations of the sections E and the said casing G. The third and outermost casing H of the heater rests upon the base-piece A and ring b5 and completely envelops the parts heretofore described. Hence there is formed between the casing and the sides of the ash-box an inclosed space M, which serves as a reservoir for cold air. A pipe h from a. suitable source of cold-air supply enters this space at the side of the heater, as shown, and one or more pipes, as h, at the top of the casing H conduct the heated air from the casing to any desired points of distribution. It will be seen that the ring b5 extends outwardly to the casing H and is perforated, as at h2, to allow air to circulate between the casings Gr and H.

In the front of the heater an ornamental plate I is preferably let into the outside casing H, being provided with fire and ash doors t' and t', which suitably t over the projecting doorways@ and b3 from the section E and the ash-box Brespectively.

lVhen lighting the fire in the furnace or when rapid combustion is desired, the damper]v3 is opened and the hot gases rising at the top of the inside casing E E pass into the stack C through the short pipe f2. Ordinarily, however, this damper f3 is closed, and the heated gas after rising to the top of the interior casing enters the openings ff and passes down through the fines formed in the corrugated portions of the side and back sections E. From these the hot gas enters the horizontal smoke-Hue C and passing backwardly toward the rear of the heater enters the base of the stack O' through the pipe 0'. The downflowing gas through the corrugations of the sections E, as well as the direct heat from the fire on the parts of the corrugated sections between the plates c2, heats the air between the casing G and the said q corrugated sections, causing it. to rise and draw additional air from the reservoir around the ash-box through the openings formed by the depressions e3 in the smoke-line C and between the latter and the bottom of the casing G. By the provision of the air-reservoir around the exterior of the ash-pit there is always a large volume of cold air ready to be drawn up into contact with the heated portions of the corrugated rectangular casing, thus allowing the said air to be quickly heated and discharged.

By making the sections E similar they will be interchangeable, there being thus required a minimum number of patterns when manufacturing various parts of the heater.

IVe claim as our inventionl. The combination in a hot-air furnace, of a rectangular fire-box having sides formed of corrugations of different sizes, a cover for the same, a smoke-flue, a substantially circular casing closely surrounding the fire-box the external contour of the corrugated sides of the fire-box conforming to the shape of said casin g and forming air-passages therewith, a stack connected with the smoke-flue, and a third casing surrounding the whole, the same having an inlet and an outlet for air to be used for heating, substantially as described.

2. The combination of a casing of polygonal section having corrugations upon its sides, the same forming alternate smoke and air passages, a conduit communicating with said smoke-passages, certain of said corrugations being of different size and shape from the others and arranged so that the casing as a whole is of substantially cylindrical form, with a second casing also of cylindrical form closely surrounding the first casing and its corrugations, substantially as described.

3. In a hot-air furnace, the combination of a fire-box having corrugated sides, a cover therefor having corrugated edges, plates covering certain of the corrugations in the sides of said re-box and thereby forming flues, the corrugations of the cover registering with the corrugations of the fire-box and providing openings thereinto, a smoke-stack a smokeue extending around the lower part of the said fire-box and connected to passages therein, a second casing around the fire-box forming air-passages with certain others of the corrugations of the same and a third casing surrounding the whole and provided with an inlet for cold air and an outlet for the heated air, substantially as described.

4. In a hot-air furnace, the combination of an ash-box, a smoke-Hue extending around the top thereof, a single casing having corrugated sides forming the tire-box and a cover supported by said fire-box, certain of the corrugations being constructed to form smokepassages, the same being in communication vwith the interior of the casing and with the smoke-flue, a stack connected tovsaid flue, a second casing surrounding the fire-box and forming air-passages with certain others of the corrugations of the sides thereof and a third casing surrounding the whole and having an inlet and an outlet for the air, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

MOSES B. MOORE.

GEO. W. LEDDON.'

Vitnesses:

JOHN C. EGE, OLIVER B. GRAY.

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