US1780783A - Furnace - Google Patents

Description

Nov. 4, 1930.

Filed Aug. 8, 1925 '2.sneets-sheet 1 NOV. 4, 1930. 4 H. E, EETY ET AL i 1,780,783

FURNAC E Filed Allg. 8, 1925 2 Sheets-Sheet 2 Vl//WlI/llll Patented Nov. 4.,. 1930 UNET? "1E ST HARRY n. Lnn'rY AND JOIINA. nonnen, or PITTSBURGH, ANI) AUSTIN W. PAGE, or PENN TOWNSHIP, ALLEGIJIENY coUNTY, PENNSYLVANIA, assIGNons mo 1?.,WALI. MANUFACTURING serrLY coIvIrfrNY, or PITTSBURGH, rIINNsYLvANIA, A -con- PORATON OF PENNSYLVANIA FUBNACE y Application mea August s, 1925- serial No. 48,978.

The present invention relates broadly to liquid and gaseous fuel burners, and more particularly to burners of this type, such as usually referred to as blow torches or fur- 5 naces, and especially adapted to the use of linemen, plumbers Aand the like, where portable heating unit-s are required, although the utility of the invention is not limited in this respect. f

For the sake of convenience in description, suoli units will hereinafter Ibe referred to as furnaces, it being understood that the term is used generically as definitive broadly of a general type of apparatus.

1n furnaces of this character as now con structed, there is a fuel reservoir usually forming the base of the furnace, a burner projecting therefrom and fed thereby, a sup-v porting top for the pot or other article to be 29 heated, and a carrying bail or handle. 1t is desirable to provide `such furnaces with a guard to protect the flame from undue wind currents, but such guard must be ofa construction permitting ready access to the oper- 25 ating parts of the burner, and one of the objects of the invention is to provide an improved guard for this purpose. y

1t is also usually necessary with such fur` naces to provide a fuel-collecting cup forthe 3c reception of a priming charge effective for preliminarily heating the burner to obtain the required vaporization of the fuel. The workmen using the furnaces ordinarily `lill such cups to the top and when the fuel is heated, the resulting expansion and boiling frequently causes lighted fuel to fall on the top of the reservoir. This is decidedly obj ec# tionable as not infrequently the temperature Within the reservoir becomes high enough-to if-' produce spontaneous combustion therein, which while not always rupturing the reser voir, at least distorts and weakens it, thereby rendering its continued use extremely dangerous.

ii tion may be produced by the burning of an accumulation of foreign matter on the res' ervoir, such for example, as parafin,wax, pitch, dust or other substances.

The present invention has for further of itsobjects aguard construction that will not 1n other cases, spontaneous combus-A add any diiculties from `the standpointof cleaning of the 'to-p of the reservoir should any objectionable matter by any chance reach the same, and also the provision of a shieldv or 4deflector betweenthe cup and :reservoir adapted to prevent burning fuel or any foreign matter from dropping =on to .the vreservoir, While at thesame time, shielding the reservoir from radiated heat. Y

\ Other objects of the @invention are to provide improve-d structuralV features with respect to the general guard construction and mounting, the cu-p and shield construction, the valve for controlling the supply of fuel to the' burner, vthe pressure pump and safety features effective under certain `'heat conditions for automatically'relieving pressure? conditions within the reservoir.

1n the accompanying drawings, there are shown `for purposes of yillustration only, lcertain preferred embodiments of the invention,

it Vbeing understood that .the drawings .fdol

not define the limits of our `invention :as changes maybe made -`lin the construction and operation disclosed therein, Without depart present invention, certain of the yparts being f shown in elevation or partly broken away for the sake of clearness;

Figure 2 `is afront elevation ,ofv the fur-y nace shown in Figure 1,=the filler plug being partly broken away; n y l f v lFigure 8 is a transverse sectional view on the line 1114111 of Figure 1, loekingin :the`

direction of the arrow;

Figure 4 is a detail sectional View on an' enlarged scale 'illustrating an improved construction for the controlling valve ;V

Figure 5 is a detaill sectional view on an enlarged scale on the yfline V-V of Figure i3; Figure f6 is -a .detail sectional view Aon. Ian enlarged scale, illustrating ,a modification of the present invention;

Figure 7 is ,a detailview illustrating still another form of the invention.

V1n .accordance- .with the ,present ;invention, it:

there may be provided a furnace having a ,Y reservoir 2, adapted to contain a predetermined'supply of fuel and forming a base for the entire furnace. This reservoir prefer-v ably has the main body thereof shaped from i, 2oY

, understcodthat this guardmay be swung bodily at will about its pivotal mounting, itV being conveniently held. in operative posi-Y tion by a suitable clamping or latching means` a single blank of metal to eliminate the nev cessity for providing seams in the main body y and is formed with a separate bottom 3, spaced above the plane ofthe lower edge 4:, y to providefa wearing Vsurface without en-v V 6, preferably having ahinged connection 7,

directly with the reservoir whereby the lower edge 6a Vof the guard may bear directly against the reservoinwithout the-necessity Vof providing an. intermediateV shoulderor band, suchv as wouldserve to retain and per.-

mit anaccumulation offoreign particles onV the top wall `of the reservoir. It willrbe of any desiredtype or desigmwing nuts 8 being shown in detail in Figure 5 for pur-l Vflame issuing from the burner, wherebylthe Y poses yof illustration only.

' Carried by the guard A6 is atop plate 9, which `may conveniently be provided withfa iangejl 10, for the reception of asecondary guard 11 for the melting pot or lother article mounted on the plate. VTheguard platemayy be provided with stepped supports tocenter a pot, and cooperate with pots offydifferent sizes'to prevent slipping orl tilting.

Projecting downwardlyinto thek reservoir is a fuel-feeding tube 12, preferably threaded at its upper lendinto a combined nut fand valve 13,' illustrated in detail in Figure 4. This nutv and 'valve body may, in turn, be

threaded on v'to a bushing 14e, suitably car@V ried by the reservoir, and preferably brazed in position therein to provide a liquid-,tight connection.V Y lbody 13 has a port 15 communicating vwith The combined` nut and valve the fuel supply pipe 12; and a secondary port 16, communicating with the lower'fend of a burner tube 17 threaded therein'. lf The ports 15 and 16 are conveniently connected bya `laterally extending passage 18, formed with a conical seat .19, for `the reception of. they needle point end 20 of a'controlling valve 21.4

i YWith the construction described, itjwill be understood that by merely removing the .combined nut and valve 13, it is'possible to simultaneously remove rthe supply tube 12,., the

valve part-s and the burner parts connected with the tube 17. jblyhavingaininimum ofjoints between which This forms a unit assemthe uid can escape, and at the same time materially decreases the overall dimensions of the parts, enabling the height of the furnace to be kept materially lower. If desired, how

ever, the vburner tube assembly hereinafter described in detail and comprising the tube 17 maybe bodily removed independently of' theunit valve body, therebypermitting removal or replacement of the individual parts Y.

at will. l. y

In .Figure 6, there is illustrated a modified method vof constructing the reservoir and of securing the bushing therein.` In this ligure, parts corresponding to parts already described are designated by th'e'same reference characters having a prime affixed thereto.`

The main body 2 ofthe reservoir has a de-V p the unit valvek body 13 is more compactly assembled and the overall height of the furnace correspondingly decreased.

: The burner tube 17 may be of any desired shape, but .preferably extends upwardly into aburner head22, within which iti-s formed witha horizontally extending portion 23, the

other end of which terminates in a downwardly and upwardlygextending burner 24C. With this construction, the burner tube is subjectedl within the burner .head to the'heat of the desired heat .for vaporizing the liquid fuel is obtained.

In order. to start burnersof this character,

thereof to shield .the fiame intermediate thek burner and the burner head; At-one side,

however, this cup isprovided with a slot 28,

determining the maximum effective depth of the cup, so far as its liquid holding. capacity is concerned, and also to providecleaning access to the burnergor jet block. `In use, work;

men ordinarily'fill these cupscompletely full and-then vlight the fuel therein. lAfter the fuel starts to boil and expand, a considerable 'K portion linay be forced or splashed outward-y ly,-and unless caught for deflected 'in'some manner, would reach the top of the reservoir, where it would burn'and produce the objectionable temperature conditions abovev set forth. kTo obviate this, a secondary shield 29V is secured in position, as by brazing, around the shoulder 25. The shield 29 may be of a shape as illustrated in Figure '3, to give the maximumprotection within the guard vwithout interfering with the swinging movement ithereof. In operation, this shield 29 will receive all surplus fuel or .droppings Yand effectively protect 'the reservoir. At the same time, it tprotects the :reservoir from .downwardly kradiated heat, this, combined with .the cooling action obtained .bycirculating air over the top of .the reservoir by means of openings 30, effectively cooling the reservoir and preventing 4damage thereto. Forobtaining the necessary pressure Within the reservoir to insure the feedof fuel, there is provided a pump cylinder 31, which may be generally of the construction illustrated in :the patent to J. E. Flitcroft, No. 1,030,465fof June 25, 1912. l/Vithin this barrel is mounted a piston rod`32, the upper end of which is preferably shaped to provide an operating 1handle .33, capable of being conveniently gripped by anloperator. Such advantages may be obtained by extending one end -of the handle, as clearly shown in Figure 1, to Ipermit two or more lingers to .be passed thereunder. The top of the handle may be Vformedw-ith a locking depression 34, adapted to receive a coiled spring 35, carried by a clevis 436, mounted on studs 37' project- Ainglatera-lly from'the bushing`38, which carriesthe pump barrel. 'These studs preferably haveshoulders or heads 37 so positioned and shaped as -to preclude the'possibil-ity of accidental lloss of the clevis or removal of the same from the studs, with aconsequent loss -offhe use thereof as a supplemental sealing. or safety device.

l-leretofore, as illustrated in the. patentreferred to, it has been customary to .provide such bushingswith a single nut for securingV the barrel in position and guiding the piston rod. In accordance with the present invention, the bushing is provided not only with a main nut 40, but also with a secondary nut 41, threaded thereinto and removable independently thereof. This secondary nut is extremely important from an operating standpoint, for the reason that it is removable independently of the barrel or of the nut and may be replaced at will when worn by the operation of the piston rod to insure the maintenance of a tight joint at all times. Also it permits removal or partial withdrawal of the pump piston independently of the barrel, whereby the pump washer may be lubricated to preserve the same and improve its efficiency or to replace the same.v

The hinged guard 6 is shaped to provide an opening 42 for the reception of a pump and its associated parts and, where the valve 21 extends horizontally, with a slot 43 for its reception. It will be apparent, however, that the valve may extend laterally at any desired angle, whereby the size of the slot may be eifectually decreased. lVhere the filler plug 44 is positioned as illustrated in Figure 2, the guard will also be shaped to accommodate such plug.

. -rIhe ifillereplug 44, the .combined unit'valve assembly 1-3 or 13', andthe bushing .38,:may all `be constructed `:to Vreceive .packing 'washers These washers lwhile "they may be of any desired 4construction andv material, are preferably formed of fibre, yit having ;been

-found that bre cracks .under predetermined temperature conditions, thereby *effectively releasing abnormal andwdangerous pressure conditions from within the reservoir. forms a desirable safety feature in connection with:the-furnaceoperation. 1 f

`Iniorder to permit lighting a burner without thenecessity of swinging the guardabout its :pivotal mounting,the :guardmay carrya closure 45, which :ma-y bemoved into :and out of operative position at will, byz anysuitable mounting thereof. `In Figure 7., theclosure 45" .is shown as .being within the guard 6',

whereby it is effectively protected .againsty of which Vthe furnace .may vbereadily transportedfromplace .to place as required. y With apparatus of .this charaeter,it is idesirable totake all `:possible precaution against .the flossof `vapor or -f-uel'from the reservoir.

In some cases, v,there-fore, it l-may be advantageousto so position the ports 15A and i 16', as shown in. Figure 6,:that the-end 20 -ofthe -valve 21* will `be Aeective for sealing both ports. With such a construction, 'even .ilf thev seal'eifected with one of the :ports shou'ldsbe defective, the .seal established with the other port will be'effective.

Certain advantages .of the present invention arise from the provision of a furnace of v'the fgeneral'fcharacter contemplated herein, -having a. guard cooperating lwith `the reservoir :in lsuch manner as not .to `tend to collect :foreign vmatter on the reservoir, vand -at the same ktime movable to inoperative lposition .to facilitate access to certain. of the koperating Vparts, ofthe furnace.

Other advantages of the invention arise 'from kthe provision ina furnace as set .-forth, of :a shield so mounted as to permit movement of theg-uard to inoperative position and l at the lsame time serving to `protect fthe reservoir from burning fuel', droppings from the ypot 'or material resting on the Atop plate or other foreignimatter, either alone .or in combination with openings, insuringan air cir- :This

culation between the shield and the lreservoir whereby heat is carried away: from the furnace and the reservoir. f

-Still further advantages'ofthe invention arise from the provision of an improved valve .body 'and fuel-feeding. tube.

" yStill'further advantages of the invention ariseV from V4the provision of Vthe improved pump mounting, andfrom theA utilization of a `construction such that Washers may be utilized in such manner as to constitute means for. automatically relieving pressureconditions withinthe reservoir when thesame-be.-

comes subjected rto increased temperature beyond ya predetermined minimum from any 'source whatsoever. I

y Additional advantages .arise'from the con# c struction of the Vpump and pump handle, Whereby'easier operation thereof-is obtained, as well as from the mountingkof thev holding clevis insuch manner that accidental loss o y removal thereof is impossible.v

We claim: Y Y yl. `Ina furnace,- a fuel reservoir, a burner vsupplied thereby, a .guard having a connection with saidreservoir; permitting move- V'ment ofthe guard yto operative andinoperative position relative to said burner, a drip cup for said burner, and a shield cooperating `with said burner and drip cup and positioned within Atheguard when the saine is in operative position toy protect-said reservoir, substantially as described. Y Y

I2. In a furnace, a fuel reservoir, a burner supplied thereby, a guard -pivotally secured to1said reservoir andfpermitting swinging movement of the same into and out of operative'positionv relative to said burner, a drip cup for said burner, and a shield cooperating `with 'said'burnerianddrip cup and positioned within the guard whenjthe same is in operativeposition to protect-'said reservoir,

' substantially as described.'

3. Ina furnace, a fuel reservoir, a burner .l

carriedvby said reservoir, a guard pivotally carriedvby said ,reservoir whereby the same may be swung intoV and vout of operative posi-v tionwith yrespect to said `burner said' guard vin closed position abutting against the top ofv said` reservoir, and aishield cooperating with said burnerand shaped to permit swinging kmovement of Vsaid guard, substantially as de-v scribed.' Y Y.

4; In a furnace,a fuel .reservoirya burner supplied by fuel from said reservoir, a comz bined temperature and liquid collecting shield cooperating Vwith said burner'and mounted entirely in spaced relation 'to 'said reservoir,

` anda guardfor saidVburner-havingan open bottom end adapted to be closed by said reservoir,f`said guard beingprovided with an opening to permit the circulation of air between said shield and said reservoir, substantially as described.

5. Ina furnace, a fuel reservoir, a. burner supplied' by fuel fromV said reservoir, primvreservoir and priming means to shield the same,` substantially as described.

y 6. In a furnace, a fuel reservoir, a burner supplied by fuel from said reservoir, priming f means, for. initially obtainingthedesired operating temperature for said burner, asliield v intermediate said priming means and said reservoir and spaced from saidl reservoir te shield Vthe same, and a guard cooperating with said burner: and constructed. tof insure the circulationof air between said shield and the reservoir, substantially as described.

7. ln a furnace, a fuel reservoir, a burner,

a guard, a -top Vplate carriedentirely by sa-id guard, a shield intermediate saidV burner and reservoir and spaced therefrom, said guard having an open lowerend adapted to` move over said shield and normally abut directly againstsaid reservoir and ybe closed thereby,A andl a connection between said reservoir. and guard permittingV the guard to'be swung lat will to inoperative position to permit access to said burner andv to the top of said reservoir.

"8. In a furnace, a fuel reservoir, a burner carried by said reservoir, aA guard pivotally carried by said reservoir whereby the same n may be'swung into' andout of operative posi'- tion with'respectto saidV burner, saidguard in closed position 'abutting Vdirectly against Y. .95

the top of said reservoir, and ak shield spaced from saidreservoir and burner and cooperat ing with said burner, said shield beingshaped Y to permit vswingingl movement .ofV the overthe same. r

y In ytestimony whereof we have hereunto ,set

ourhands. v i' HARRYJELIJEETY.Y

kJOHN A. ECKERT. g v

VVAUSTINv W. PAGE guard

Images