US1505607A - Apparatus for atomizing fuel oils, etc. - Google Patents

Description

Aug., AIi@ BQZ,

O. C. SCHROEDER APPARATUS FOR ATOMIZING FUEL oILs, ETC

Filed Dec. 23. l92l B'Shsw-Sheet l o. c. SCHROEDEF:

APPARATUS FOR ATOMIZING FUEL OILS, ETC

Filed Dec. 23 1921 2 Sneeuw-Smm 2 [Ni/EN TOR.

.Patented Aug. I9, 1924..

` OSCAR C. SCHROEDER, OF CHICAGO, ILLINOIS.

APIARATUS FOR AATOMIZING FUEL OILS, ETC.

' f Application led December 23, 1921. Serial No. 524,558.

Toall 'whom 'it 'may` com/cern.' Be it known that vIOsoAR C. SCHROEDER, a

l citizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new'and useful Improvements in `Apparatus' for Atom'izing Fuel Oils, Etc., of which the following is a specification. Y

My invention is concerned with a novel apparatus designedv primarily for atomizing fuel oils, but which may be used for atomizing other liquids, and is designedto produce a centrifugal deviceof the class described that sha-ll be extremely sim e yand compact, and which will operate wit a very high degree of efficiency. y

To this end it consists of an electric motor yieldingly supported so that its armature shaft, which constitutes its/vertical axis,- is free to shift so it can find its true axis yof rotation, andcarrying a centrifugal sprayer on the upper end of its hollow armature shaft, the lower end of which dips into a` supply of oil carriedup through the shaft by its rotation so asv to be delivered to the sprayer.

Another feature of my invention resides `in the use f a' centrifugal sprayer-cup mounted on the top of the armature'shaft,

and provided with a coverrotating there?` l with and having internal vanes which act to create a draft through the cup'to mix air with the oil as it is atomized.

- `Another feature of my-invention resides' sin' the employment withsuch a centrifugal sprayer. of an annular member disposed in the 'path of the main How vof the airl ,to

support the combustion so-as to direct the air to the flame vin a manner which will cause `the most elicient combustion of the fuel.

Another feature of my invention resides in the novelapp'aratus which I emplol'for keeping the supply ofL-oil for the atomizer at the required level. i

To illustrate my invention, I attach hereto two sheets of drawings, vin which the same reference characters designate identical parts in'all the figures, of which,-

' Fig. 1 is a `view, partly diagrammatical, showinggthe apparatus installed and provided with means for supplying it with oil; Fig. 2 is a top plan' view in section on the line2-2 of Fig.V 1;

Fig. 3 is a central vertical section, on-an enlarged scale, showing the atomizer;

Fig; et is -a plan view in section on the lined- 4 of Fig. 3;,and

Fig. 5 is a view in section on the line 5 5 of Fig. 3, but ona larger scale.

carrying out my invention, I have ,shown it as applied to a furnace l0 of\ an desired construction, and with the lcentri ugal sprayer-cup 11 projecting up. through a suitable aperture in the floor of the furnace, which will be covered with fire brick or other similar material iny ya customary man# ner. rIhe cup 11 is preferably furnished with a hollow stem l3`shown as pinned onto `the inverted cup-shaped lower portion 12 of the sleeve 14 that lextends up through the stem .13 to the top of the cup 11. This i' 'l sleeve is threaded at its lower end onto the reduced upp'er end of the armature shaft 15 of the motor, the casing 16 of which is preferably composed of the cylindrical lower portion having the bottom 17 thereof pro' vided with the apertures 18 and having the top 19 thereof secured thereto by screws 2O passed through said top, and threaded into the bottom of the casing. The ball bearings 21 and 22 of the armature shaft are of vany desired type, the bearings 21 being inter,

posed between the, armature shaft and the annular flange 23 projecting up from the top 19 of the casing, and the bearings 22 are l interposed between the adjacent portion .of

'any desired consruction, and which I have' shown as conve iently provided -with the plurality of legs 27A adjustably secured 1n the pipes 28, which will be supported from the floor of the room in which the burner 1s \1o'cJated, so that the cup llcanfbe adjusted at any desired height relative to the floor of the' fire-pot.

In order that the amature' shaft of the` motor may be free tov find its true axis of rotation, I mount the casing 16 yieldingly upon the top of the oil holder 26, and for this purpose I prefer to employ the'three cup-shaped lugs 29 on the to 'of the holder with the opposed cup-shape lugs 30 projecting outwardly and downwardly from the -bottom ofthe side of the motor casing which is provided with a reduced portion,

adapted to be surrounded by the spring 31 so that the plug 32 is supported by the spring yieldingly against the bottom of the Y -lug 30.' I have found that this flexible bearing gives the desired possible movement ofthe motor casing relative to the oil holder so that the armature shaftl of the motor can'rotate lfreely and find its true axis of rotation, thus resulting in its runningsmoothly and noiselessl`y\ with a minimum expenditure of'power. The hollow armature-shaft has its bottom closed except for a small aperture 33 in the plug ,Secured therein, and when the holder 26 is filled lwith oiland the motor is rotated by current applied thereto, the oil is carried up by the centrifugal force through the .extension 25, the hollow armature-shaft 15 and the sleeve 14, to the apertures 34 formed in the sleeve 14, from which point it iies outward to the inner wall of the cup 17, and is ycarried up on said inner wall-until it reaches the top a`nd overflows, as it were, the edge, from which it is thrown out tangentially in a inely divided condition.

It will be noted that the area of the apertures 34 greatly exceeds the area of the aperture 33 in Ithe plug, and this is essential in securing the automatic` rise of the oil through the hollow-shaft.l lIt will further'be noted that'` the aperture 33 is in the bottom ofthe shaft and concentric therewith, as it is impossible to draw oil into the shaft through radially extending apertures, as the centrifugal actionA of the rotating shaft prevents it, but facilitates its rising 'through the small a erture in the center of the bottom of the s a`ft. s.

It will be understood that the current is carried to the field coils 35 of the motor, and to the commutator 36 of the armature '37', by suitable connections,` which need not The upper portion'of the casing 16 is provided with the apertures 38, so that air can pass up through the apertures 18, past the armature and'out through the apertures 38, to keep the motor cool. The bottom of the cup 12 .is provided with a plurality of apertures 39 arranged in a circle and 1 is provided with a plurality ,of radiallyinside of the annular flange 40 projecting up from the bottom of the cup. The cup 1s preferably provided with a disk-shaped cover 4 1, which has thesplit stem 42 by which 1t is held yieldingly in the top of the sleeve 14. The under side of this cover In these opposed cups I place the extending Vanes 43, seen in section in Fig.

2, which vanes operatev to create a draft of air up through the apertures 39 and out for purposes of comvbustion aboveJ the oil.`

The flange 40 serves tQprevent such re-` siduum of the oil as does not leave the cup from running down through the apertures 39.v l

They bottom of the lire-pot 11 is preferably provided with av truncated, conicalshaped vopening 40, yintowhich fits the hollow casting 41 of the same shape as the opening, and which is provided with the trough-shaped lower rim 42, which has at one point the pilot light 43 supported ltherefrom.V This rim is preferably supported from three places by'bars 44 secured to the under side thereof and supported by pipes 45 extending down to the floor. The aperture 40 has a plurality of channels 46 formed therein for the following purpose:

through the channels 43 into the trough 42,

which has the discharge spout 47 t0 discharge the oil into a bucket48 hung upon a lever 49 connected to the electric switch controllingv the current to the motor, so that inthe event that it is operatingv -without the oil burning, as soon as the bucket 48 Vis filled -t'o the desired extent, the switchcombustion of the oil thus delivered, it is necessary to place above the aperture- 46 an annular plate 50, which, as clearly seen in Fig. 1,is placed a short distance from the cup 11, and has `its edges extending out over the top lof the aperture v40. This plate 1s conveniently supported from the casting 41 by the three legs 51 having'the recessed ends which fitover the to of thel casting. The effect of this plate 1s to divide the current of air sucked up through. the apernd that to'vinsure thelmost perfectl ture 40 and to deliver it where it operates most effectively in securinc perfect combustion of theoil sprayed t ereby.

To secure' a. lproper level of the oil in the holder 26 at a l times, I provide the mechanism illustrated partially diagrammatically in Fig. 1, where 52 represents the oil- The valve 57,

vsupply tank, which has a pipe 53 leading l which'may be like an ordinary air, valve for tires, inv the casing co-operates. with a valve seat 58, and is normally held closedfby the helically-coiled expanding spring 59 'co-operating therewith. The-valve stem 60 passes up to land is engaged by the plug 62 sliding through the snugly-'fitting bearing 6l' in' the top of the valve casing, and has'its upper end engaged byI the set screw 63 threaded through the bell-crank lever 64, which is ful- Qcrumed to the` valve casing, and has its oil brings the float 65 into operation.L It.

will be understood thatfwhen there is a sufficient supply of oil in the holder, the spring 59 holds the valve closed, but when the oil gets low, the heightof the float 65 acting" against the spring opens the lvalve 58 and allows the water to flowpast the valve and into the tank 52, displacing the oil above it and causing it to iiow into Ithe holder 26 untilit reaches the desired level, when the float 65 is raised so that 'the' spring 59 is free to act again and" close the valve.

While l have shown and described invention Aas embodied in the form which l at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications and that I donot desire to be limited in the interpretation of the following claimsM except as may be ne-l cessitated by .the state of the prior art.

What l claim as new, and desire to secure by Letters Patent of the United States, is: l.. In anapparatus of the class described,

the combination with an electric motor havv ing a vertically disposed hollow armature.

shaft, `of a supp'ortfor the motor casing, connections between-the supportA and the motor casing permitting the'latter to swing A to adjust itself automatically to the true axis of rotation of the armature, a liquid holder beneath the casing'into which lthe lower end of the'armature-shaft dips, acentrifugal atomizer on the upper end of the shaft, and means for maintaining` liquid in the holder.

2. In an 4apparatus of the class described, the combination with an electric motor having a vertically disposed hollow armatureshaft, ofa support for the motor casing, a liquid holder beneath the casing into which the lower end ofthe armature-shaft dips,

connections between the support and the mctor casing permitting the latter to swing to adjust itself automatically to the true axis of rotation of the armature, a ycentrifugal atomizer on the upper end of the shaft, and

means for maintainingliquid in the holder,-

the armature-shaft' having a small orifice in its lower end anda larger one in its upper end. 1

3. In a centrifugal atoinizer, the combination with a liquid holder 'having a plurality of. spring-engaging members arranged in a j circle on the top thereof, of a motor with` its casing having a corresponding plurality of spring-engaging members, an atomizer carried by the top of the hollow armatureshaft, 'the lower end of whichprojects into the basin, and helically-coiled expanding springs interposed between the opposed `pairs' of spring-engaging members.

4. In a centrifugal atomizer, the combination with a liquid holder having a plurality of spring-engaging members arranged 'in a .circle on the top thereof, of a motor with its casing having a corresponding plurality of opposed spring-holding recesses, an atomizer vcarried bythe top of the hollow armature-shaft, the lower end of which projects into the holder, helically-coiled expanding springs having their lower ends engaging the spring-engaging members on the holder and their upper ends extending intoI therecesses, and bearing plugs with lsemispherical upper ends engaging the bottoms of the recesses and with reduced lower ends surrounded by the upper ends of the springs in the recesses.

5. ln an apparatus of the class described, the combination with a vertically-disposed hollow shaft, of means for rotating the same, a liquid holder supplying liquid to the bottom of said shaft, an atomizing cup secured on'the top of the shaft with openings thereinto from the shaft, and a cover rotating withthe cup and provided on its inner surface with vanes inside of the cup, for the Lpurpose described. a

6. In an apparatus of the class described,

the combination with an electric motor hav- .ing a vertically-disposed hollow armature-k cup and .provided on-its inner surface with vanes, for the purpose described.

7. ln an apparatus ofthe class described, the combination with affire -potV having a truncated conical aperture opening into the bottom thereof, of a centrifugal atomizing cup projecting up through said aperture and discharging its fuel tangentially above the bottom ofthe pot, and an annular plate having three or more pins extending downward from the under side thereof surrounding the atomizer between its delivery plane and the bottom of the pot, said pins being supported on the top of ythe walls of the aperture. v A

8. ln an apparatus of the class described,

the combination with a centrifugal atomizer'.

having'a hollow vertical shaft, of a li uid holderinto which it dips, a tank for oil, a

' pipe connecting the top of the tank with the combination with a centrifugal atomizer having a hollow vertical shaft, of a liquid holder into which it dips, a `tank for oil,

a pipe connecting the top of the tank with the bottom of the holder, a Water pipe connected with the source of water under pressure and opening into the tank, a `valvevin said Water pipe, and connections to said valve operated by the level of the oil in the holder to open the valve when the oil supply therein gets too Alow and to close it when it gets too high, said connections consisting of a spring tending to close the valve, a float in the holder, and connections from the float to the valve so that the weight of the float opposes the spring and opens the valve.

10. In an apparatus of the class described,

.the combinationwith a centrifugal atomizer having ahollow vertical shaft, .of a liquid holder into which it dips, a tank for oil, a, pipe connecting the top of the tank'with the bottom of the holder, awater pipe connected with the source of water under pressure and opening into thev tank, a valve in said water pipe, and connections to said valve operated by the level of the oil in the holder to open the valve when the 'oil supply therein g ts too low and to close it when it gets too igh, said connections consisting of a spring tending to close the valve, a float inthe holder, and connections from the float to the valve so that the Weight i of the float opposes the spring and opens to the float and pivoted at the other end adjacent the valve casing, a plunger ysliding through the top of the valve and engaging the valve stem, and [a set screwin the bell crank co-operating with the top of the plunger, substantially as and for the purposeN described.

11. In an apparatus of the class described, the combination with an electric motor having a vertically disposed hollow armature shaft, of a support for the motor casing, a liquid holder beneath the 'casing into which the lower end 'of the armature shaftdips, a centrifugal atomizer on the upper end of the shaft, and means for maintaining liquid in the holder, the armature shaft having a small orifice in the bottom of its lower end and a larger one in its upper end.

I2. In a liquid fuel burner, the combination with a liquid holder, of a vertical hollow shaft extending intoI the holder having a small axially extending concentric orice in its bottom and a larger discharge area at its top, an atomizer element on the top of the shaft rotating therewith, bearings for the shaft, and means for rotating the shaft.

13. In aliquid fuel bu`rner,the combination with a liquid holder, of a hollow shaft extending downwardly into the holder having a relatively small axially-extending concentric orifce in its bottom and a larger discharge area atits top, an atomizer element on the top of the shaft rotating therewith,

and .means for rotating the shaft.

In Witness whereof; I have hereunto set m hand and aixed my seal, this 10th day o November, 1921..

SGAR C. SCHROEDER. p Witness:y

. yJOHN HOWARD MoELRoY;

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