US742062A - Hot-air furnace. - Google Patents

Description

110.742.062.' 's PAugBNTED 0011.20; 190s.

n P. J. P10011. f

HOT AIR PURNAGE. APPLI'oATloN H'LBD APR. i1, 190s.

No MODEL. f SHEETS-SHEET i. 4

PTLNIED 00127240-, `1903. F. J. PIOGILV I' HOT AIR PURNACE,v APPLIUATION FILED un. 11, A1903.

2 SHEETS-SHEET 2.

- N0 MODEL.

TTOH/VE 73.'

YH: No'njus PETERS co, PHoToumn..wAsM|NuTou, nA c.

l Patented October-20, 1903.

PATENT OFFICE. l

FRANK J. PIO-CH, OF CRESTON, IOWA.

HOT-AIR Fuels/lola.v

SPECIFICATION forming part'of Letters Patent N o. 742,062, dated October 20, 1903.

Application iiled April 11, 19037.

To all whom t may concern,.-

Beit known that I, FRANK J. PIOCH, a citizen of the United States, and a resident of Creston, in the county of Union and State of Iowa, have invented a new and Improved Hot- Air Furnace, of which the following is a full, clear, and exact description. l

My invention relates to hot-air furnaces and to analogous heating appliances, my more particular object being to increase the efficiency and controllability of the draft and to produce certain improvements in construction.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a central vertical section on the line 1 1 in Fig. 2 of a hot-air furnace embodying my invention. Fig. 2 is a horizontal section upon the line 2 2 in Fig. 1 looking in the direction of the arrow. Fig. 3 is a fragmentary section upon the line 3 3 in Fig. 2 looking in the direction of the arrow. Fig. 4 is a side elevation of the arm used for controlling a portion of the draft by the opening and closing of the furnace-doors. Fig. 4 is a rear elevation of the closure-lid and its immediate connection, and Fig. 5 isa section on the line made in sections 1l 12, provided with radial lugs 13 14, the section 12 being provided at its top with an annular liange 15, into which fits the bottom of the fire-dome 16. The top of this dome is rounded at 16a into the form of a cupola. A square passage 17 is provided for the purpose of feeding fuel into the lirepot in the usual manner. A plurality of tubular elbows 18 are integrally connected with the fire-dome and are of the shape indicated best in Figs. land 3. Mounted upon several of these elbows are tubes 19, spaced apart, as indicated in Fig. 2. At 20 is a conical mem- `downward and into the smokepipe.

Serial No. 152,157. (No model.)

ber constructedl of metal and closed at its top, as indicated in Fig. 1.Y This member rests at 2Oa upon one of the elbows 18.

21 is a hollow member, partially flattened at its bottom, as indicated in Fig. 5, and connected by a joint 22 with the'square passage 17. The top of the tubular member 21 is provided with an appropriate joint 21j, to be connected with a pipe 25. The several tubes 19 are similarly provided'with joints23, whereby they maybeconnected with the several tops of the elbows 18. A number of curved tubular passages 25 are connected with the respective topsof the tubes 19 and the tubular member'2l. These tubular passages 25 terminate at 26 within.the` cylinder 27, being thereby caused to converge to a common point above the fire-dome, and a small pipe 28 leads oit laterally from this point of convergence.

. Arocking damper 29 is pivoted at 30 and is provided with a lug 31, which is engaged by a rod 32, provided with lugs 33 and with a handle 34, whereby the damper 29 may be adjusted to any desired degree by merelylifting the handle 34 andmoving the same in or out, as desired. A rod 35, provided with a handle 36, is connected with a rocking damper 37, this damper being disposed immediately adjacent to the central or cupola outlet 38 of the fire-dome.

A pipe 39 is connected at 40 to the cylinder 27 and is of the sinuous shape indicated in Fig. 1. This pipe normally carries the smoke and gases of combustion directly upward then laterally in a direction to the right and thnce onnected 'to the. end of sinuous pipe 39, by means of a joint 41, is a smoke-box or checkdraft 42, provided with a closure-lid 43, this lid being provided with slot-s 44 45 for the rods 35 32, enabling the same to be manipulated without opening the closuredd 43. This lid is pivoted at`46 upon the smoke-box or checkdraft 42 near the lower end of the smoke-pipe 47, the smoke-pipebeing mounted, by means of a joint 48, upon the smoke-box42. 4

The furnace-door proper is shown at 49 and is pivoted at 50, so as to be free to swing in` the usual manner. Mounted rigidly upon this door and movable therewith is an arm 51, provided at its free end with an adjustable bearer 52, the same being radially mov- IOC able and secured in position by an adjustable bolt 53. The door 49 is provided with a han die 5l and with the usual draft accessory 54, this draft accessory being mounted upon the central pivot 55 inthe usual manner. The square passage 17 is provided with an aper-` ture 5G, opening into the tubular member 2l, and a small innerdoor 57 is hinged at 58 and is free to partially obstruct the passage 56. The closing of the door forces the bearer 52 into engagement with the inner door 57,caus ing the same to occupy the position indicated in Fig. l, and thereby to partially obstruct the draft otherwise passing up into the tubular member 2l. When, however, the door 49 is open, the inner door 57 swings downwardly and into its vertical position. The object of this movement is to prevent a sudden gust of flame and hot gases from passing out of the furnace-door upon the same being opened. The idea is that the opening of the furnacedoor causes the inner door57 to open abruptly,

thereby starting up a vigorous draft through the passage 56 and tubular member 2l, thus averting the iame, which might otherwise flash out of the furnace-door.

The general draft of the furnace may be regulated for four different purposes and for all of these purposes may be controlled by meansofthehandles3436. Byrunningthese handles out through the smoke-box 42, as above described, the necessity to open any part of the furnace is obviated. The rods 32 35 lie directly in the path of the smoke and hot gases, so that there is no need for any other passages through the casting,which might allow some of the gases to escape.

In order to start the fire, I generally open both of the dampers 37 and 29. This gives the tire a free escape to the chimney and prometes the greatest draft possible. After the tire begins to burn briskly I close the damper 29, leaving the damper 37 open. This causes the llames and hot gases to travel upward through the central or cupola passage 38 and to pass up into the pipe 39, to thence pass in a lateral direction downward to the smoke-box 42 and thence pass upward into the smoke-pipe. The sinuous path thus pursued enables the stove to throw out more heat than when both dampers are open, as at first described. Suppose now that on account of bad weather 0r of a bad draft in the chimney the fire burns with diculty. The proper way to remedy this is to close the damper 37 and open the damper 29. The flames then travel upward through the dome 1G into the cupola lwhence they spread outwardly and downwardly, passing into the elbows 1S and up through the tubes 19 and 2l, thence through the tubular members 25 to a common point immediately above the damper 37, thence through the pipe 28 to the smoke-box and to the smoke-pipe. A smaller portion will in this case pass through the pipe 39, or nearly all of the llames and hot gases will pass through the short pipe 2S. By this arrangement the flames and hot gases have considerable travel and will keep the furnace well heated. The fourth and last way, and which is preferable under normal conditions, is to close both dampers. The ames and hot gases then pursue the paths of maximum length, passing first up into the cupola 16, thence outwardly and downwardly into the elbows 18, thence upwardly through the several tubular passages and downwardly into the cylinder 27, thence upwardly into the pipe 39 and through a sinuous path to the smoke-box 42, whence they make their escape into the smoke-pipe. This gives the furnace maximum heating capacity.

It will be observed that the short pipe 2S and the long and sinuous pipe 39 virtually constitute a bifurcated offtake for the flames and gases of combustion.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In a hot-airfurnace, the combination of a fire-dome, a plurality of tubular passages connected therewith and converging to a common point, an oiltake connected with said passages, said olftake having two members, and means controllable at will for obstructing one of said members.

2. In a hot-air furnace, the combination of a fire-dome, a plurality of tubular passages connected therewith and converging to a common point, an offtake connected with said passages, said offtake having two members, and a manually-controlled damper connected with one of said members.

3. In a hot-air furnace, the combination of a fire-dome, provided with an outlet, a damper connected with said outlet, a plurality of tubular passages connected with said firedome and converging to a common point, above said outlet, an offtake connected with said tubular passages, said offtake having two tubular members, and a manually-controlled damper mounted within one of said passages.

4. In a hot-air furnace, the combination of a fire-dome, mechanism connected therewith for directing the flames and hot gases to a point disposed above said dome, a bifurcated otftake for directing said llames and hot gases to a chimney, said oiftake having two members, one being straight and the other comparatively sinuous, and means controllable at will for governing the capacity of said straight member.

In testimony whereof I have signed my name to this specification in the presence oil' two subscribing witnesses.

FRANK J. PIOCII. Vtitnesses:

HELEN D. MITCHELL, HEZEKIAH MITCHELL.

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