US1575379A - Furnace humidifier - Google Patents

Description

March 2 1926. 1,575,379

0. P. NYSTROM FURNACE HUMI DIFI ER Filed July 21. 1924 3 Sheets-Sheet 1 15 Miss Fro m March 2 1926.

o. P. NYSTROM FURNACE HUMIDIFIER Filed July 1 1924 3 Sheets-Sheet 2 hwenfor n m M Nun a March 2 1926.

.0. P. NYSTROM FURNACE HUMIDIFIER Filed July 21. 1924 s sheets-sheet 5 W V0 ww M wwu w a W ij M m P m/ 3/ Patented Mar. 2, I926.

UNITED STATES 1,575,379 PATENT OFFICE.

OSCAR P. NYSTROM, OF HOLLAND, MICHIGAN, ASSIGNOR 'IC HOLLAND FURNACE COMPANY, OF HOLLAND, MICHIGAN, A CORPORATION OF MICHIGAN.

FURNACE nournrrinn.

Application field July 21, 1924. Serial No. 727,136.

To all whom it may concern:

Be it known that I, OSCAR I. Nrsrnom, a citizen of the United States of America,

exact description-of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to furnaces and is especially directed to a novel constructionof humidifier for the evaporation of water in the air heating space enclosed between the outer casing and thefire pot, combustion chamber and radiator of the furnace. it is a primary object and purpose of my invention-to provide a humidifier in which a. large evaporating surface is furnished and in which a continuous supply of water to the humidifier construction is provided so that the same never becomes dry. A further object of the invention is to provide a drain for excess of water supplied to the humidifier that such excess may be carried and delivered to the ash pit, dampening the ashes and thereby eliminating dust, and at the same time supplying a certain amount of moisture in the air which goes to the burning fuel, this being a desirable feature in furnaces. Further, it is an object and purpose of the invention to constructthe water holding parts of the humidifier as an integral portion of the ash pit casting with substantially no increase in the cost of manufacture of such casting. p

The construction by means of which these results and others not at present specifically stated are attained is shown in the accompanying drawings in which,

Fig. l is a central vertical section, from front to rear, through a furnace equipped with my invention.

Fig. 1* is a fragmentary enlarged detail in vertical section of the water holding part ofthe humidifier construction. 2 is a horizontal section taken substantially on the plane of line 2-2 of Fig. 1. Fig. 3 is a fragmentary front elevation of the furnace equipped withthe invention and showing the means of water supply.

therefor, an

' Fig. 4 is a fragmentary enlarged vertical sectionthrough the front of the furnace her is integrally formed including and through the trough or spout which car ries the water to the water holding portion of the humidifier construction.

Fig. 5 is a vertical elevation partly in section of a furnace showing, modified arrangement of the humidifierembodying this invention and,-

Fig. 6 is a sectional plan with parts broken away from the line 6-6 of Fig. 5.

Like reference characters refer to like ings. I

As shown in Fig. 1', the furnace includes the usual ash pit l a fire pot including two superimposed sections 2 and 3 located above the ash pit and with agrate 2 between the fire pot and ash pit, a combustion chamber At located above the section 3, and a radiator dome 5 and a radiator 6 at the upper end of the combustion chamber 4 all enclosed by burning member of the furnace and has hotair pipes 8 at its upper end to carry heated air to the various rooms to which hot air. is to be supplied by the furnace. At the front the casing is cut away and replaced by a casting 7. The combustion chamber casting 4 has a forwardly extending inlet 9 leading to one of the front castings 7 in which a door 10 is mounted which may be opened for the passage of fuel to the fire pot. The ash pit has a bottom. 11 and is also formed with integral forwardly extending sides 12 at the front which are spaced apart and extend to the lower cast ing? in which the usual door 13 is mount ed carrying the usual draft member, the door being opened-when desired for the removal of ashes.

The construction so far described is old and well known. At the upper side and at the front of the ash it construction between the forwardly extending sides 12 a top 11:11ama a onzontal section 14 at the front which is then extended downwardly and to the rear at an incline as indicated at 15 with two spaced apart upper extending sides 16 cast integral with the top member, as shown, and with transverse or cross ribs 17, 18 and 19 located between the sides 16 whereby three coinpartments are made adapted to hold water.

c5 parts the different figures of the draw- Hit ' side of the part 14 and is in a higher plane nearest the fire pot. It'is onl holding compartments are thus made and r it is designed that water shall be'received in the compartment in front of the rib 17 until it is full, thenceflow over this rib into the nextcompartment and when it is full flow over the rib 18 into the compartment water in the'last compartment as reached the level of the opening 20 that any excess is conducted down the guide 21 to drop into 2hthe ash pit. A. very large evaporating surface is made and a large quantity of water vapor is given off ,with a. humidifier construction made as described: I

A trough orspout 22 passes through an opening in the lower front casting '2' at its inner end being located directly above the water holding compartment in front of the cross rib 17. The hot water coil for the furnace is provided with a supply pi e 23 which connects with the coil 24 whi e an outlet pipe 25 connects with the coil in the usual manner. In the supplypipe 23 a T 26 water coil 'supply pipe. It may be obtained.

, able is interposed from which a plpe 27 of small diameter depends, at its lower end being equi ped with a pet-cock 28 with a valve whic may be manually operated through handle'29 shown. .This pet-cock is located directly over the outer end of the trough or spent 22 and water drops into the trough in greater or less amount according to the degree that the valve is opened. This, after a little experiment and trial, may be so that the proper amount of water will be furnished.

It is not necessary that the water to supply a humidifier be taken from the hot from any source." It is almost universal practice to provide a hot water coil with supply pipe in the position described and it is very convenient to obtain water for the humidifier from this location.

By using this. water pan which has previously been commonly used is omitted and the opening usu-' ally provided for it is covered by a removplate 30 removal of which spectlon or cleaning of the hum difier;

The construction illustrated m Figs. 5 and 6 shows the .gpossibility of locating the humidifier in positions than uponthe when the the water holding of humidifier the rmits intop of the ash pit section, such for example as upon-the top of the feed door section 9.

This construction may be made almost An-outlet pipe 36 communicating with i the upper humidifier may also be provided throug which a surplus amount of water will escape and drain into troughs 37 and 38 which surround the furnace beneath it. The trough 37 has a drain pipe 39 leading tothe trough 38 and the trough 38 has a drain pipe 40 lea-ding'to the lower humidiier.

It is not probable that all of the humidifier pans and troughs will be necessary to produce/the requisite amount of moisture in any single installation and those not necessary may be eliminated.

While the invention has, been .described and shown as formed as an iiltegral part of either the ash pit casting or the feed section casting it is not necessarily so made. When the humidifier is embodied in newly. constructed furnaces-it is expedient to make it as shown. butwhen it is desired to apply the device-is made separately the guide 21 may be extended through a hole cut through the top of the ash pit-section;

The construction is easily manufactured,

compartments formed on theash pit casting and with practically no addition in cost of manufacture. The hot water coil for furnaces is a regular and almost universal installation an being all 7 that is required additional is the. trough or spout 22, the T 26 and the parts connected thereto extending toward the trough. "The.

water holding compartments are full at all times, a large evaporating surface is provided and the quantity of water held in the small diflerent compartments is relativel so that the evaporation of the water is rapid the same being quickly heatedwitha resultant'increase 1n evaporation. As a rule the amount of moisture supplied with'warm'airi furnaces is much too small but with my in-- ventionthe moisture supplied to the warm 1 air going to the roomso the house is greatly increased, 'in practice at least six-fold. And at the same time an assurance 1s.had

that'the water holding com artments 0f the of water and.

humidifier shall always be eliminated permitting air to circulate freely around the space formerly occupied by the water pan which adds to the etliciency and heating capacity of the furnace.

The invention is defined in the a 'lpended claims and is to be considered comprehensive ofall forms of structure coming within their scope.

I claim: I

1. In a furnace, an ash pit casting and a fire pot casting located above the ash pit casting, said ash pit casting at one sidehaving outwardly extending spaced apart sides and a top disposed between the upper edges of the sides, said top including an outer horizontal section and an integral downwardly and inwardly inclined section, spaced apart sides cast with and extending upwardly from said top, and a plurality of spaced apart cross ribs cast with the inclined section of the top and with said last mentioned sides, said cross ribs, excepting the innermost cross rib having upper edges located in planes lower than the next adjacent outer cross rib, substantially as and for the purposes described.

2. A construction containing the elements in combination as defined in claim 1, said top adjacent the next to the innermost cross rib having an opening-made therethrough, and a downwardly and inwardly inclined guide, rib cast integral with the top on the under side thereof and extending from said opening downwardly and inwardly.

3. A construction containing the elements in combination defined in claim 1, combined with a casing and enclosing the furnace,-and

a water carrying trough mounted on and extendin through the casing having its inner end isposed over the said top at a point in front of the front outermost cross rib, and its outer end outside of said casing.

4. A construction containing the elements in combination defined in claim 1, combined with a casing enclosing the furnace, a water carrying trough mounted on and extending through the casing and having its inner end disposed over said topat a point in front of the front outermost cross rib, and its outer end outside of the casing, a water carrying pipe located over the front end of the trough, and a manually operable velveteecured to the pipe for controlling the passage of water therefrom to the trough.

5. In a furnace, an ash pit casting and a fire pot casting located above the same, a casing enclosing the said castings, and a water holdin device located directly in front of the re pot and integrally formed with said ash pit casting comprising a downwardly and inwardly inclined bottom, spaced apart upwardly projecting sides, and a 'plu rality of spaced apart cross ribs extending between the sides, said cross ribs, excepting the innermost having their upper edges lo,- cated in plane-s lower than next adjacent t'ront cross rib, substantially as described.

6. In a furnace, an enclosed ash pit, a fire pot located above the ash pit, and a combustion chamber and radiator located in superim 'iosed relation over thefire pot, a water coil extendlng into the combustlon chamber from outside of the furnace, a

water holding device located directly in front of the the pot, a trough, a casing surrounding the ash pit, fire pot, combustion chamber and radiator, said trough extending therethrough, and means for supplying water continuously from the water coil to said trough for .transferrence thereby to the water holding device.

7. In a furnace, including an ash pit having a forwardly projecting portion, fire pot, combustion chamber and radiator with an enclosing casing around the same, a water holding receptacle located directly above said forwardly projecting portion of the ash it and having a downwardly and inwardly 1nclined bottom, sides, and cross ribs dividing the receptacle into compartments located in different horizontal planes, the cross ribs being of a height that water flows over the same from a higher to the next lower com partment when full; said lowermost com-.

partment being formed with a drain opening at its highest point in its bottom, and means to continuously supply a predetermined amount of water to the highest compartment of the'receptacle.

8. A furnace ash pit comprising a casting having substantially vertical walls continuously around the ash pit except at one side thereof, said walls being extended-outwardly inspaced apart parallel vertical relation, :1 top disposed between the upper edges of said outwardly extended portions of said walls and including a section extending downwardly and inwardly at an angle to the horizontal, spaced apart upwardly projecting sides cast integral with said top, and a plurality of spaced apart cross ribs disposed ,between said last mentioned sides, said cross ribs, excepting the innermost rib having upper edges located in planes lower than the edge of the next adjacent outer cross rib. v

9. A furnace ash pit comprising a casting having substantially vertical walls continuously around the ash pit except at one side thereof, said walls being extended outwardly inspaced apart parallel vertical relation at said side, a top disposed between the upper edges of said outwardly extending portions of said walls and including a section exsaid top, and a plurality of spaced apart cross ribs disposed between said last mentioned sides, said cro'ss ribs, except the innermost rib, having upper edges located in planes lower than the edge of the next ad- .jacent outer cross rib, and said bottom having an opening therethrougli closely adjacent the next to the innermost cross rib and between the same and the innermost cross rib, substantially as and for the purposes described.

10. A furnace humidifier comprising a tacle, means for supplying water to the receptacle above the uppermost rib and means for draining water from the receptacle near its lower side and for conveying said water to the ash pit of the furnace. p In testimony whereof I afiix my signature.

OSCAR B. NYSTROM.

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