USRE6290E - Improvement in hot-air furnaces - Google Patents

Description

0. Ban.

Hot-Air Furnace.

N0. 6,290. Re'bssuedFeb, \6,1875= wnusssss= vmvnnum ATTORNEYS.

' above the diaphragm. Fig.

v spo'nding parts.

.scribed gei'ierally, and indicated specifically .The upper part of the casing has one or more apertures i in the side of the casin PATENT OFFICE.

DAVID BOYD, onnnw YOR TIMPROVEME N T IN HOT-AIR FURNACES.

Specification forming part of Letters Patent N 0. 153,928, dated August 11, 1874 reissue No. 6,290, dated:

February 16, 1875; application filed annary 25, 1875.

To all whom it may concern:

Be it known that I, DAVI BoYD, of the city, county, and State ot'New York, have invented a new and useful Improvement in Hot- Air Furnaces, of which the following is a specification: v

In the accompanying drawing resents a vertical section of the ing the diaphragm and general arrangement of the parts. Fig. 2 is a horizontal section 3 is a horizontal section through the base of the dome above the fire-chamber. g

Similar letters of reference indicate corre- Figure 1 repheatcr, show- This improved apparatus is designed for use both as a heater for the apartment in which it may be located, and as a furnace for heating other parts of the building to which hot air may be conveniently or economically coiweyed by pipes or tubes.

The features of novelty are hereinafter dein the claim.

The lower part of the heater is made up of domes B B B, fire-box J, ash-box K, inclosed in a casing having openings 0 for discharge of heated air. The air to be heated enters at i, traverses tubes 11, and enters space O,whence it escapes at F. The products of combustion pass up throughdome-space G into flue F.

openings, 0, or short tubes for escape of air. The upper compartment is occupied bythe concentric flue, S, which communicates with the flue F at the center of the compartment, and also at the periphery or outside. The pivoted damper T is located in the flue Fbetween the inner and outer portion of flue S to cause the productsof combustionto take the circuitous and return course indicated by arrows in Fig. 2, or the direct one through passage F, thus, in large measure, controlling the degree of heat radiated by the heater, and also the rapidity of combustion. The air to be heated in the upper compartment enters I and heated, and utilize utilizing the heat abo same chamber with the pipes and flues .for

carryingott' the heated products of combustion, that the density of the heat surrounding said fines preveutsthe same from radiating heat, and it is thereby confined and carried up thechimney without being utilized, and thus wasted. The diaphragm A, being attached to casing N, as shown-in Fig. 1, en-

- ables me to divide the casinghl into two separate apartments, one inca sing the lire-box and dome covering the same, the other -'incasing the pipes and flucs carrying off the heated products of combustion. I can thereby supply each chamber' separately with 'air to be the heat from both, thus ye the diaphragm, which would otherwise be lost; It will also be seen by this arrangement that the heat obtained from the upper apartment will be free from contact with the red-hot surface of heater.

Having thus described my invention, I claim as new and desire to secure by Letters Patent'- i The diaphragm A, in connection with the casing N, in combination with the upper compartment of casin inlet and discharge passage F, and damper T, the latter beingarranged to control the direction of the smoke current, as shown and described. v 4

DAVID BOYD.

Witnesses:

T. B. MOSHER, ALEX. F. Ronnm's.

on the 11th day of g N, the concentric tlues S,

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