US764004A - Air-heater. - Google Patents

Description

PATENTED JULY 5, 1904.

N0. 764,00L I Will PERKINS. AIR HEATER.

APPLICATION FILED MAY 18, 1903.

N0 MODEL.

' m xmmi UNITED STATES Patented July 5, 1904.

\VILLIS J. PERKINS, OF GRAND RAPIDS, MICHIGAN.

AIR-HEATER.

SPECIFICATION forming part of Letters Patent No. 764,004, dated July 5, 1904.

Application filed May 18, 1903. Serial No. 157,593. (No model.)

To all whom it may concern:

Be it known that I, WVILLIs J PERKINS, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Air-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.

My invention relates to improvements in air heaters, and more particularly to such heaters adapted to be placed in circuit with a pipe for conveying smoke from a furnace to a chimney; and its object is to provide a simple and effective device the smoke-passages of which can be readily opened and cleaned without disturbing the pipe connections as occasion may require, to provide a cheap and convenient device, and to provide the same with certain new and useful features, hereinafter more fully described, and particularly pointed out in the claims.

My invention consists, essentially, of a body portion divided by a series of plates into alternate air and smoke flues, a breeching at each end connected to the smoke-fines and provided with suitable openings and closures for the same, whereby access may be readily had to the said flues, inlet and exit pipes connected to the respective breechings, suitable inlet and exit pipes connected to the respective air-flues by suitable distributing and collecting chambers, and in the combination and arrangement of these elements, as hereinafter more fully described, reference being had to the accompanying drawings, in which Figure 1 is an isometrical perspective of a device embodying my invention; Fig. 2, a longitudinal vertical section of the same on the line 2 2 of Figs. 3 and 4:; Fig. 3, a transverse vertical section of the same on the line 3 3 of Fig. 2, and Fig. 4 the same on the line 4 t of Fig. 2.

Like letters refer to like parts in all of the figures.

A represents the body of the device, consisting, essentially, of an outer case, preferably having the form of a parallelopiped and made of suitable material, preferably sheet metal,

and divided into numerous thin horizontal lines by plates of thin heat-conducting material, such as copper or steel, each alternate flue A being connected at each end to suitable breechings, through which breechings and alternate flues the smoke circulates, and the other alternate fines, A, being connected at their respective ends to suitable air distributing and collecting chambers, through which chambers and flues the air to be heated is circulated. The smoke-fines are preferably open at the ends and attached to the respective ends ofthe body A, and inclosing the open ends of said smoke-fines are breechings B and D. These breechings are provided with suitable openings C and E, having any suitable closures which may be readily opened for the purpose of cleaning the smoke-fines as occasion may require without disturbing the pipe connections or other parts of the structure. The opening C is large enough to be opposite the ends of all of the smoke-fines, and through this opening any suitable instru- 'ment may be inserted into all of the smokeflues for cleaning the same. The opening E is placed near the bottom of the breeching D for convenient removal of the material discharged from the smoke-fines when they are cleaned.

G is 'a pipe attached to the breeching D and extending to any suitable chimney.

B is a suitable downward extension of the bottom of the breeching B, whereby a pipe F may be connected 'to the breeching below the door C, which pipe at the other end is connected to any convenient furnace provided with the usual dampers and other appliances for regulating the draft. By raising the body of the device above the level of the pipe in the circuit of which it is inserted the smoke having a tendency to rise will tend to be pocketed or retained in the device, and thus more effectively part with its heat. Also by this construction I am'able to gain access to the smoke-fines without detaching any of the pipe connections.

To properly supply the air to be heated to the alternate flues A, a distributing-chamber H extends. across the bottom of the body A at one end, preferably adjacent to the breeching D, and thence upward at each side, as at H, to the partitions Q, whereby the incoming air is distributed to suitable ports L, opening into the lower flues A, and passing to the other end 01 the said fines is discharged through the ports O into transfer-chambers N. The air thence passes upward in these transfer-chambers and enters the upper series of air-fines through the ports P, and, passing through said flues to their opposite ends, is discharged through the ports M into an upper collecting-chamber 1, extending across the body A and thence downward at each side of the same, as at I, to the partitions Q. From this chamber the heated air escapes to any suitable register or room through a pipe K. The tendency of the air to rise when heated maintains the described circulation through the device and discharges the hot air into any convenient upper room, to which the pipe K may be extended either vertically or otherwise, as occasion requires.

J is a pipe for the incoming cold air,extend ing from the distributing-chamber H to any suitable air-supply. The air thus traverses horizontally the entire length of the body A through the lower fines, thence passes to the upper flues, and back again the entire length of the said body, being exposed in thin layers to plates which are heated by exposure to the smoke and hot gases passing between them from the furnace to the chimney.

It will also be seen that the device is cheaply constructed of sheet metal, can be interposed between any furnace and the chimney, can be readily cleaned from accumulated soot and ashes without disturbing or taking down any of the connections, and exposes a very large amount of heating-surface within small compass and does not materially interfere with the draft of the chimney. By making the body of different lengths the capacity may be varied at pleasure, and, if desirable, more than one of these heaters may be placed in a smokepipe and the hot air conveyed to any rooms either directly or diagonally above the level of the heater. By conveying the air in a direction opposite to that of the smoke the greatest difference of temperature is maintained at the opposite sides of the plates, and thus the greatest eiiiciency secured. The hotter portions also tend to rise, and thus the hottest air and hottest smoke are in the upper fines, and this tends also to aid the efficiency. So, also, by the horizontal flat flues the hottest smoke rises against the under side of the upper flue-plate and the coolest air in the flue above falls upon the upper side of the same, thus increasing its eflieiency over a vertical flue. Itis also obvious that various modifications of structure may be adopted without departing from my invention. Ido not, therefore, limit myself to the precise construction shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination of a hollow body, a series of plates in the same and spaced apart to form flues, each alternate flue having end openings and the remaining flues having side openings near each end thereof, breechings inclosing the end openings, smoke-pipes opening into the breechings, air-chambers inclosing the side openings, partitions in one of said air-chambers, and air-pipes connected to said air-chamber at the respective sides of the said partition.

2. The combination of a hollow body divided into a series of thin flues by means of plates spaced apart, said body having openings into the respective ends of each alternate flue, and also having openings into the side of the other alternate lines, and near the respective-ends of each of said fiues, breechings opposite the end openings and having openings for cleaning the lines, removable closures for said openings, smoke-pipes connected to the breechings, side chambers opposite the side openings, and air-pipes connected to the side chambers.

3. The combination of a hollow body having openings in its ends, and openings in its sides near its respective ends and arranged in alternate planes, a series of plates in said body and spaced apart to form a series of lines alternately opposite to the respective end and side openings, breechings opposite the end openings and provided with openings for cleaning the Hues, removable closures for'said openings,air-chambers opposite the side openings, and air-pipes connected to the air-chambers.

4:. The combination of a hollow body,having openings in its ends, and openings in its sides near its respective ends, said end and side openings being arranged in alternate l1orizontal planes, breechings opposite the end openings and extending below the same, and provided with openings, removable closures for said openings, smoke-pipes attached to the downward extensions of said breechings, airchambers opposite the side openings, and airpipes connected to said chambers.

5. The combination of a hollow bodyhaving a series of end openings, and also having a series of side openings near its respective ends, said side and end openings being in alternate vertical planes, a series of horizontal plates spaced apart and forming fines alternately opposite the said side and end openings, breechings opposite the end openings and extending below the same, smoke-pipes connected to the lower part of said breeching, one of said breechings having an opening opposite said end openings, and the other breeching having an opening in its lower part, removable closures for said openings, air-chambers opposite the side openings, and air-pipes connected to said chambers.

6. The combination of a hollow body having a series of end openings, and also having a series of side openings near each end, a series of plates spaced apart and separating the end openings from the side openings and forming a series of lines alternately opposite the end openings and side openings, breechings opposite the end openings, smoke-pipes opening into the breechings, a distributing-chamber and a collecting-chamber at one end of the body and respectively opposite a part of the side openings, and a transfer-chamber opposite all of the side openings at the other end of the body, and air-pipes opening into the distributing and collecting chambers.

7. The combination of a rectangular hollow body having end openings, and also having side openings near each end, said side and end openings being arranged in alternate vertical planes, horizontal plates between the planes of the said end and side openings, and dividing the interior of the body into superposed fines alternately opposite the respective end and end and opposite all of the adjacent side open-' ings, a collecting-chamber at the same end as the distributing-chamber and opposite the remaining side openings, and air-pipes connected to the distributing and collecting chambers. In testimony whereof I afi ix my signature in presence of two Witnesses.

WILLIS J. PERKINS. Witnesses:

J. W. BROWN, L. H. EVARTS.

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