US2463830A

US2463830A - Vaporizing unit for retort burners

Info

Publication number: US2463830A
Application number: US536485A
Authority: US
Inventors: Boyd W Tullis
Original assignee: Coleman Lamp and Stove Co Ltd
Current assignee: Coleman Lamp and Stove Co Ltd
Priority date: 1944-05-20
Filing date: 1944-05-20
Publication date: 1949-03-08
Anticipated expiration: 1966-03-08

Description

VAPORIZING UNIT FOR RETORT BURNER-3' Filed May 20, 1944 INVENTOR:

fi yd W Yaw/s,

ATTORNEYS.

Patented Mar. 8, 1949 VAPORIZING UNIT FOR RETORT BURNERS Boyd W. Tullis, Wichita, Kans., assignor to The Coleman Lamp and Stove Company, Wichita, Kans., a corporation of Kansas Application May 20, 1944, Serial No. 536,485

11 Claims.

This invention relates to Vaporizers of the type employed in vaporizing liquid fuel delivered to liquid fuel burning appliances.

Prior to the present invention Vaporizers of this character have been constructed for vaporizing straight run gasolines, and a warning was given by the manufacturer to avoid the use therein of ordinary motor fuels, particularly those containing anti-knock compounds, gums, and like objectionable compounds. This warning was necessary because the objectionable compounds decomposed at vaporizing temperature of the fuel and solid particles resulting from decomposition collected within the Vaporizers to such an extent that the Vaporizers clogged and the contained parts such as the cleanout needle became relatively immovable after a few hours burning operation.

Straight run gasolines are not readily available in all communities and it has been highly desired to provide a vaporizer that operates successfully on ordinary motor fuels, as such fuels can be purchased even in the more isolated places.

It is, therefore, the principal object of the present invention to provide a vaporizer capable of operating over relatively longer periods using ordinary motor fuels.

Another object of the invention is to provide a relatively simple and inexpensive vaporizer having a relatively large capacity so that it may be operated over a long period, then discarded and replaced by a new unit.

Further objects of the invention are to provide a vaporizer constructed as a unit for facilitating replacement thereof; to provide a Vaporizer with a cleanout needle guide that forms a part of the replacement unit and which provides for ready insertion of the cleanout needle when replacing the vaporizer; and to provide a vaporizer with a needle guide which eliminates interference with operation thereof by decomposed particles of fuel which result when a motor fuel is used.

In accomplishing these and other objects of the invention, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawing wherein:

Fig. 1 is a longitudinal sectional view through a vaporizer constructed in accordance with the present invention and showing its attachment to the fuel control valve of a liquid fuel burning appliance.

Fig. 2 is a cross section through the vaporizer on the line 2-2 of Fig. I particularly illustrating support of the entrance end of the needle guide.

Fig. 3 is a cross section through the vaporizer particularly illustrating packing of the needle to prevent leakage into the needle guide.

Fig. 4 is a detail perspective view of the inlet portion of the vaporizer tube and the adjacent portions of the needle guide parts shown in disassembled spaced relation to better illustrate construction thereof.

Referring more in detail to the drawing:

l designates a liquid fuel vaporizer embodying the features of the present invention and which includes an elongated tubular body 2 having a relatively thin wall 3 forming a cylindrical vaporizing chamber 4 having ample diameter for collection of solid particles resulting in decomposition of fuel when the vaporizer is in operation. The inlet end 5 of the vaporizer tube is swaged as at E to provide a supporting neck 1 of smaller diameter and which slidably and rotatably mounts a union nut 3 by which the vaporizer tube is mounted upon a fuel control valve 9 of a fuel burning appliance (not shown). The valve 9 is of the usual construction in that it has an externally threaded branch ill on which the nut 8 is turned to connect the vaporizer tube. The branch of the valve is provided with a bore II in which is reciprocably mounted a needle actuating plunger I2 that is manipulated by a rotary lever I3 as in usual practice. The nut 8 has an internal shoulder I4 engaging an outwardly flaring flange l5 on the neck of the vaporizer and which seats upon an annularly beveled edge 16 of the branch [0 of the regulating valve. With this arrangement the nut is retained upon the neck of the vaporizer and forms a part thereof.

The opposite end of the vaporizer is externally threaded as at l? to mount a cap l8 for closing that end of the vaporizer tube and which carries a collar 19 having an internally threaded bore 20 to mount a fuel discharge tip 2|, the tip 2| being provided with a relatively small outlet orifice 22 located within the extended axis of the vaporizer tube as shown in Fig. l.

Reciprocably supported within the vaporizer tube is a cleanout needle including a rod 23 having a hook-shaped end 24 engaging within the aperture 25 of the ear 26 on the plunger I2 whereby the cleanout needle is operably connected with the plunger and the rotating lever therefor. The opposite end of the cleanout needle projects within the bore of the collar I9 and into a recess 21 of the fuel tip where it carries a needle point 28 adapted to reciprocate through the orifice 22 when the rotating lever is actuated as later described.

In order to prevent interference with operation of the needle by any solid particles collecting within the vaporizer, the portion of the needle which extends through the vaporizing section of the tube is supported within a tubular guide or shield 2Q, the tube having an inner diameter to freely pass the body portion of the cleanout needle so that the cleanout needle is freely movable therein. The end of the guide tube located Within the discharge-end of the vaporizer tube'is supported within an opening 36 formed within a porous support comprising a plurality of screen disks 3! that are pressed within the end of the tube closed by the cap it asshown in Fig. l. The opposite end of the tube is threaded as at 32 to engage in the threads 33 of ac'ollard lwhich forms a part of a packing box 35 as'best shown in Fig.4.

The packing box includes a cylindrical wall portion 36 of larger external diameter than the collar 33 to provide an annular shoulder 31 for seating the packing box against a platelike bracket 38 when the collar 3 is projecting through an opening 390i 1e bracket, the free end of the collar being spun over the upper face of the bracket as indicated at id-to retain the packing box anchored thereto as shown in Fig. 1.

-An internal shoulder 4| is also provided for engaging one end of a packing sleeve 42 inserted in the packing box and held in sealing contact with the body portion of the needle by a washer which is retainedin position withinthe packing boxby'spinningthe free edge-44 thereof over the face of the washer. The plate-like bracket-38 is of substantiallytriangular shape to provide relatively pointed ends45.46,-and 4'? that are slightly indented-into the wall of the tube adjacent the enlargedendof the swaged portion '6 thereof to anchor the bracket against longitudinal movement within the vaporizer tubeupon reciprocation-of the cleanoutneedle. The sides -48 of the bracket cooperate with the wall of the vaporizer tube to provide a plurality of passageways 49 wherethrough the fuel is adapted to flow into the vaporizing portion-of the tube. The vaporizing portion of-the 'tube-is preferablyloosely filled with metallicwool 'or'the like 5!] (Fig. 1) to enhance heat conduction from the wallof the'vaporizer and :promote heat contact 'area with the fuel being passed-through-the vaporizer tube .when'in operation.

It is thus obvious that the vaporizer tube 2, needle guide 29, cap l8,"fue1 tip 2|, and union nut 8 form a unit assembly so that the vaporizer units may be readily removed when necessary and replaced with a new unit.

In assemblying the :unit, the packing sleeve 42 is inserted in thepacking box'35 followed by the Washer '43 and the projecting edge 44 is spun thereover'to cooperate with the internal shoulder 41 'at the-opposite endof the packing to hold the packing-in compressed position for sealing contact :with the cleanout needle when passed therethrough. The collar =34 of the cleanout tube is then passed through-the opening 39 01 thebracket 38 so that the shoulder 31seatsthereagainst and then the free edge-of the collar is spun over the plate-like bracket'as shown in Fig. 1. The tubular guide 29 for the cleanoutneedle 23'is then screwed into the internallythreaded collar 34 and-the assembly is inserted through theilarger openend of the vaporizer tube 2 and'moved to a. position so that the relatively pointedends 45,46; and 41 of-the bracket plate 38 engage the enlarged and of the swaged portion 6 of the tube whereupon a contractingpressure is applied to the walls of the vaporizer tube tocause the

ends

45, 46, and-41 to sligh dent the-metal of theitube "foranchoring 4 the guide tube therein. The metallic wool or the like 50 is rolled in tubular form and inserted Within the vaporizing chamber portion of the tube and with an inner diameter of the roll sufficient to pass over the cleanout needle guide tube. After the wool is inserted in the vaporizer chamber the screens 3| are pressed into the open threadediendx oftthe tube 2iforisupporting the adjacent end of the cleanout needle guide in axial relation with the vaporizer tube. The cap 18 is then screwed upon the threaded end of the vaporizer 'tube'and the fuel tip inserted within the collar portion i9 thereof. The union nut 8 may be'slid'upon the reduced portion of the vaporizer is discarded. Thecleanout needle is thenipassed through the *guide vtubeof-a :n'ew vaporizer unit: so that the point thereof is adapted to -pass through the orifice 22 .of fthe'fuel tip 2 l EThe hookediend 24 iofnthe 'cleanoutznee'dle is :then engaged with E the apertured ear "26 ofzthezoperatingiplunger1:2

after rwhich the belleshaped flange-1Z5 .is moved in seatin'g contact 'With'ithe beveled s eat i L6. ..The union nut :8 is then turned uponxthe ineck'1 into engagement with the 'threadsaon the branch .4 def the'control valve. -When the 'nut'is tight the internal-shoulder 14 therein isi'inclamping engagement with thebelleshap'ed flange of the vaporizer tube to provide a leak-tight joint and supportrf'or the vaporizer .uniton-the controlvalve. When the fuel control valve is open-liquid fuel :fiOWs :around the plunger -12 through the heck I of .the' vaporizer tube *into the space between the swage portion 6-:andithemackingbox: 35: and through the passageways into the vaporizin :section .ofithe tube wherein the liquid is changed .to a vapor-by heat which is transmitted responsive to burning of the fuel in the burner (non-shown) *whichthe vaporizer is serving. The-ava porpasses through the screen I 1 -and%through'-the orifice 22 ofthe fuelrtip-2 l.

Any solid-.parti'cles which mayresult from decomposition of objectionable components of the fuel .collect within 1 the vaporizing schamber'of the tube butwthecapacitythereof is such as tozaccommodate a largevamount of the material-:before it is necessary to replace the vaporizingnnit. :At times the orifice-of the'fuel tip may tendito clog with the :solidpar'ticles .but these :are: readily re.- moved upon projecting the needle point through the orifice 22 byactuationzof the'arotary lever :43.

From "the foregoingita is'aobvious that Ihave provided avapori-zer unit 'of :simple and :inexpensive .construction sothat it is..economically practicable to :discard the -.unit when necessary and replace it=with a n'ewzunit thereby: permitting use i of ordinaryiautomotive fuels.

:It-isalsowobvious-that the contained guide' ztube and packing box xcarried zt'herebylprevents any interference of g the particles which may result through decomposition :of :portions contain'ed'zin the fuel from interfering with operationsofi the cleanout-needle,

-What =I':claim :and desire -torse'cure :by iLetters Patentis:

v1. .A "vaporizer nnit adapt d -for use with a,

cleanout needle including, a tubular body, a fuel discharge tip at one end of said body, a guide tube coaxially arranged within the tubular body, a plurality of screens in said end of the body and having registering openings coaxially aligning with the discharge tip for receiving and supporting one end of the guide tube, a spider-like plate having points indented in said tubular body for supporting the other end of the guide tube, a packing box connected with the guide tube adjacent the spider-like plate, and a packing sleeve in the packing box adapted to seal about the stem of the cleanout needle when projected through the guide tube.

2. A vaporizer unit adapted for use with a cleanout needle including, a tubular body, a fuel discharge tip at one end of said body, the opposite end of the tubular body having a reduced neck portion forming a fuel inlet to said body, a plurality of screen elements in the end of the tubular [body carrying said discharge tip, a spiderlike memberengaging within the tubular body near the reduced portion thereof, said screen elements and plate having coaxial openings, a guide tube supported in said openings, a stufiingbox connected with the guide tube at the plate supported end of said tube, and a packing in said box adapted to seal about the stem of the cleanout needle when projected through the guide tube.

3. A vaporizer unit adapted for use with a cleanout needle including, a tubular body, a fuel discharge tip at one end of said body, the opposite end of the tubular body having a reduced neck portion forming a fuel inlet to said body, a plurality of screen elements in the end of the tubular body carrying said discharge tip, a substantially triangular-shaped plate in said (body at the reduced portion thereof, said screen elements and plate having coaxial openings, a guide tube supported in said openings, a stuffing box connected with the guide tube within said reduced portion of the tubular body, and a packing in said box adapted to seal about the stem of the cleanout needle when projected through the guide tube.

4. A vaporizer unit adapted for use with a cleanout needle including, a tubular body, a coaxial guide tube within the tubular body, a fuel discharge tip at one end of said body, a plurality of screens in said end of the body and having an opening coaxially with the discharge tip for receiving and supporting one end of the guide tube, a spider-like plate supporting the other end of the guide tube in said body, a packing box connected with the guide tube, and a packing sleeve in the packing box adapted to seal about the stem of the cleanout needle when projected through the guide tube.

5. A vaporizer unit including a tubular body having a swedge portion at one end terminating in a reduced cylindrical neck, a discharge tip on the opposite end of the tubular body, a cleanout needle guide tube, means supporting the cleanout needle guide tube coaxially with the discharge tip including a plate having apeXes thereof indented within the tubular body at the base of said swedge portion and provided with an axial opening, a sleeve-like packing box having a reduced collar portion engaged in said opening and having an annular shoulder engaging the plate, an outturned flange on said collar cooperating with the shoulder to anchor the packing box to the plate-like support, a sleeve-like packing Within the packing box, a follower in the packing box for compressing the sleeve-like packing, and an inturned flange on the packing box retaining the follower.

6. A vaporizer unit including a tubular body having a swedge portion at one end terminating in a reduced cylindrical neck, a discharge tip on the opposite end of the tubular body, a cleanout needle guide tube, means supporting the cleanout needle guide tube coaxially with the discharge tip including a plate having apexes thereof indented within the tubular body at the base of said swedge portion and provided with an axial opening, a sleeve-like packing box having a reduced collar portion engaged in said opening and having an annular shoulder engaging the plate and cooperating with a turned over portion of the collar to anchor the packing box to the platelike support, a sleeve-like packing within the packing box, a follower in the packing box for compressing the sleeve-like packing, an inturned flange on the packing box retaining the follower, fastening means rotatably slidable on the neck, and an outwardly flaring flange on said neck cooperating with theswedge portion to retain the fastening means.

'7. A vaporizer unit including, a tubular body,

' a fuel discharge tip at one end of said body, a

cleanout needle guide tube in said body, a fuel inlet connection at the opposite end of the tubular body, means supporting one end of the guide tube in said body coaxially with the discharge tip, means spaced from said inlet connection in the direction of the fuel discharge tip for supporting the other end of the guide tube coaxially of the tubular body, and packing means connected with the end of the guide tube between said inlet connection and the last named supporting means for sealing about the stem of a cleanout needle when the cleanout needle is projected through the guide tube, both of said supporting means being arranged to pass fuel from the fuel inlet connection to the fuel discharge tip.

8. A vaporizer unit including, a tubular body having a coaxial fuel inlet at one end, a fuel discharge tip at the other end of said body, a cleanout needle guide tube in said body, means in the tubular body and spaced from the fuel inlet end for coaxially supporting the adjacent end of the guide tube, said supporting means being arranged to pass fuel from the inlet toward the fuel discharge tip, foraminated means supporting the other end of the guide tube within said body, and packing means connected with the guide tube at said inlet-supported end to seal about the stem of a cleanout needle when the cleanout needle is projected through the guide tube.

9. A vaporizer unit including, a tubular body, a fuel discharge tip at one end of said body, a fuel inlet connection at the other end of the tubular body, a coaxial guide tube within the tubular body, a plurality of screens in the tip end of the body having registering openings coaxially aligning with the discharge tip to support an end of the guide tube, a support in the tubular body between the inlet connection and said screens for supporting the other end of the guide tube, a packing box connected with the support and the guide tube, and a packing sleeve in the packing box adapted to seal about the stem of a cleanout needle when projected through the guide tube, said support being arranged to pass fuel from the inlet connection toward the fuel discharge tip.

10. A vaporizer unit including, a tubular body,

ems-gear) a. lcoaxialacleamnt 'cneedle -guide tube within (the tubular body, means supporting the eleanout needle. guide ituhe coaxially with the dischargetip including arplate having :apexes thereof indented within :the tubular body and vvprovided with an axial opening, .a sleeve-like packing box having aqreduced'collar portion engaged in said opening and having an annular shoulder engaging the plate, an inturned flange on said collar cooperating with the shoulder to anchor the. packing box ,to. the, (plate, of said support, a sleeve-like packing within. the packing box, a follower .in the packing box for compressing the sleeve-like packing, and'anv inturnedxflange 0nthe :packing box'zreltaining the follower.

:11. A vaporizer unit including a tubular body, a fnelrdischarge tip at, one endof said :body, the opposite end: of-saidbodyhaving a reduced neck portion forming alshoulder in said'body, a. union nut slid'able on said neck, arfiange on said neck cooperating with the shoulder portion to retain the union nut a cleanout eneedle'gui'de. tube .extending coax'ially of the tubular body, a spiderlike support within the tubular body an'dlseated on the shoulder for retaining one end of said gzuid'eutube in coaxial relation, a poroussupp'orting-meansat the tip end ofqthe tubular body'for 8 supporting i'the other end of the guide :tube, and azpacking :material filling the space between "the tubular body and tubular guide and extending between the spider-like support and said pporous supporting means.

BOYD W. TUILI'S'.

REFERENCES CITED The following, references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 268,777 Baker Dec. 12, 1882 6545669 Perillat July '31, 1-900 7213447 Howells'et al .-Feb. 24, I903 910,685 Hubert Jan. 26, 1909 1 23603324: Ti'lley' Nov. 30', 1920 15416328 Blanchard May 16,1922

1 6673613 'Tilley Apr;'24, 1928 211083882 Tullis July'23; 1935 20403223 Tullis 'May'-1-2 1936 123765034 Gronow etal. Mar. 10, 1942 FOREIGN PATENTS Number Country Date 600,319 France Nov. 4, -1925