US 3612037 A
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Description (OCR text may contain errors)
United States Patent Inventor John B. Spiggle Rochester, N.Y.
Appl. No. 815,758
Filed Apr. 14, 1969 Patented Oct. 12, 1971 Assignee Bernzomatic Corporation Rochester, N.Y.
BLOWTORCH BURNER ATTACHMENT QUICK CONNECT-DISCONNECT DEVICE 4 Claims, 4 Drawing Figs.
U.S.C1 126/414, 431/344 Int. Cl 823k 3/02, F23d 13/04, F23d 13/30 Field of Search 126/401, 413, 414,431/344, 345
 References Cited UNITED STATES PATENTS 1,132,969 3/1915 Paul 126/413 1,548,447 8/1925 Dice 126/413 1,568,726 1/1926 Evleth 126/413 2,121,728 6/1938 Boyd 431/344X FOREIGN PATENTS 108,051 7/1917 Great Britain 126/413 Primary ExaminerCharles .I. Myhre Attorney-Burgess, Dinklage & Sprung ABSTRACT: A blowtorch burner attachment which has a quick connect-disconnect device, the attachment formed as a thermoconcentrator which directs the flame into an area of the thermoconcentrator provided with a soldering tip or other conductive means of transferring heat, or formed to provide flame shapes for special applications.
PATENTED 0m 1 2 I971 SHEET 1 [IF 2 Z m 4 F INVENTOR JOHN B. SPlGGl-E BLOWTORCII BURNER ATTACHMENT QUICK CONNECT-DISCONNECT DEVICE BACKGROUND OF THE INVENTION burner head. The jet of gas passing out of the head is mixed.
with air to form a combustible mixture ignited in the form of a flame which is used for various purposes. The cylinder is usually remote from the torch head and is generally in the form of a portable hand-held cylinder with the torch head and valve mounted directly thereon. This typeof portable blowtorch and cylinder constitute generally the disposable LP. gas cylinder type widely used.
The burner of these torches are generally so constructed that the flame is admitted in the form of a well-defined cone which may be used for precise heating of a given point of area, in which case the same is often designated as a pencil burner. The burner may also be so constructed that the flame is not sharply defined but covers a wider area in which connection the same is often designated as a utility burner. These two types of burners generally constitute the type of burners used throughout. Special burners of the torches are sometimes constructed to provide a particular flame shape which may contain the same quick connect-disconnect device.
SUMMARY OF THE INVENTION The principal aim of the invention is to eliminate the disadvantage of the reduced efficiency when a change in flame shape is called for and the attachment is a screw-on type requiring colling before removal. Also, by case of a quick connect-disconnect device the advantage is gained of utilizing the maximum temperature and heat-transfer characteristics provided by the torch. One object of this invention is a simple device for an attachment which is capable of withstanding high temperatures and heat-transfer characteristics of the torches and maintaining spring-holding characteristics to provide a quick connect-disconnect device other than the prior known art teaches.
Another object of this invention is to provide a quick connect-disconnect device sufficiently strong for holding the flame-shaping attachments for many heating purposes, requiring high temperature or heat-transfer characteristics for any practical brazing, silver-soldering, or other applications which require a higher heat output. The attachment which is provided on the end of the burner of the torches is so constructed that the flame is shaped in the form necessary to obtain sufficient heating output with a minimum of loss, and in addition, especially where heat-transfer characteristics are used, will in some instances require the application of force to some extent, such as in soldering and brazing.
A further object of this invention is a quick connect-disconnect device construction of simplicity in design, ease in manufacture, and which has improved the efficiency of the connectdisconnect characteristics of prior art burner torch attachments.
DESCRIPTION OF THE DRAWINGS A description of the basic principals of this invention will more readily follow a description of the specific embodiment of the invention shown in the accompanying drawings, in which,
FIG. I is a perspective view of an embodiment of a blowtorch having an attachment quick connect-disconnect device constructed in accordance with the invention;
FIG. 2 is a cross section of the blowtorch burner with the attachment quick connect-disconnect device of the torch shown in FIG. 1;
FIG. 3 is a perspective view of a further embodiment of a blowtorch having an attachment quick connect-disconnect device constructed in accordance with the invention; and
FIG. 4 is a cross section of the further embodiment of the blow torch with an attachment quick connect-disconnect device shown in FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, FIG. I shows a conventional, disposable propane cylinder 1, to which a detachably-connected cylinder tab 2 is provided with shutoff and flow-adjustment valve 3. Extending from tap connection 2 is gas tube 4, on which is mounted torch burner 5. The end of gas tube 4 is threaded at 6 and. sealed by gas spud 7, sealed and placed with O-ring gasket 8. Gas spud 7 has a gas flow orifice of small diameter extending coaxially therethrough. A jet pump section of the blowtorch burner is screwed on to gas tube 4 at threads 6. This has the conventional and well-known construction of a jet pump being provided with an induced fluid inlet, a diffuser having inlet section I0, central mixing tube 11 and outlet 12. The induced fluid inlet is in the form of peripheral air inlet ports 9, generally provided in multiple and distributed about the circumference.
Cylindrical sleeve 13 is screwed over the end of the jet pump section. The sleeve has an annular external diameter, on to which cylindrical sleeve I9 is fitted. Longitudinally embossed cylindrically split tolerance ring 20 is fitted into and against the internal surface of cylindrical sleeve 19. Split tolerance ring 20 is fixedly retained within the internal circumference of cylindrical sleeve I9 at one end by bent-over portion 18 and at the other end by reduction in diameter 19'.
crimped portion 18 and the reduction in diameter 19' of this sleeve, sleeve 13 abuts the reduction in diameter of sleeve I9 to provide a further extension of the diffuser outlet having outlet section 21 including peripheral exhaust ports 22. The extension of diffuser outlet 21 provides an area for concentrating the flame of the blowtorch burner at point 23. The transfer of heat from point 23 and the surrounding area to the tip of soldering iron 24 is maintained by conductive means. The heat loss in the surrounding ambient air is minimized by the heating effect of the exhaust flame through exhaust ports 22 and the further reduction of sleeve 19'.
In operation, valve 3 is opened in the conventional manner,
causing gas to flow through the central orifice of spud 7 into the inlet portion of diffuser 10, through mixing section II and out through outlet section 12. In a conventional manner, the jet pump air is drawn in ports 7, mixed partially with the gas in mixing section 1 I and flows out of outlet section 12. A portion of the gas stream flows at high velocity through central axial passage 16 of flame holder 15, and a partial stream flows around the periphery of flame holder I5 through peripheral passages 19 and 20. This provides a mantle of gas which can be ignited in the conventional manner as by a match or spark or the like and which will maintain and form a well-defined pencil flame of high-velocity burning gas which passes through central axial passage 16. The peripheral gas flow thereby provides a mantle of slower moving gases which ignite easily and support combustion of the gas mixture flowing at a higher velocity through central passage 16. This high-velocity pencil flame emerging from central axial passage 16 passes through the further extension of diffuser outlet 21 and is concentrated on point 23. The attaching or detaching of the attachment is made by simply slipping sleeve 19 over sleeve 13.
The embodiment as shown in FlGS. 3 and 4 is identical with the embodiment previously described except for the torch tip, the attachment, and most notably the flame holder which is designed for producing a utility-type flame. As shown, in this embodiment, the same gas tube 4 and jet pump section are used. The cylindrical sleeve 31 has initial section 32 of reduced diameter and an outlet section 33 of increased diameter, the diameter of the sleeve conically widening from the diameter 32 to the diameter 33. Positioned within section 32 is a flame holder and diverter, the flame holder consisting of the member 34 with fluted ribs 25, and the diverter consisting of the conical member 26. The fluted ribs 25 form the peripheral gas flow passage through which the gas flow is forced outwardly by the diverter 36 forming a diffuse utility-type flame. Operation of the device up and through the jet pump is identical to that described in the previous embodiment. The highvelocity gas stream emerges from the jet pump and is diverted by diverter 36, the flow being forcibly outward through the annular passage formed between the diverter and the inner wall of sleeve 33. The end of sleeve 33 acts as a flame shield.
A further embodiment of a construction of an attachment is shown in FIGS. 3 and 4. This type attachment is substantially applicable to use on a utility-type torch burner. Longitudinally embossed cylindrically split tolerance ring 38 is inserted similarly to that described in the prior torch burner attachment of the soldering tip type. Crimped-over portion 37 of sleeve 39 and the reduction in cylindrical sleeve 39' retain split tolerance ring 38 in position. The bias inherent in split tolerance ring 38 also adds in maintaining the split ring in position by pressing against the internal circumferential surface of sleeve 39. Further reduction of sleeve 39 is in the form of a fanning out portion 39" wherein the apex is truncated leaving outlet 4] at the tip. The gas flow through the torch burner is in a conventional manner starting with the operation of valve 3 which is opened in the conventional manner causing gas to flow through the central orifice of spud 7 into the inlet section of the diffuser 10, through the mixing section 11 and out through the outlet section 12. Positioned in section 32 is a flame holder and diverter, the flame holder consisting of member 34 with fluted ribs 35, and the diverter consisting of conical member 36. The gas flowing therethrough is forced outwardly by diverter 36 forming a diffuse utility type flame and into the end of sleeve 33 which acts as a flame shield shaped in a well-rounded flame. The passage of the flame through outlet section 33 into attachment section 40 is reshaped and fanned out by the construction of the attachment providing a flame line at outlet 41. The attachment is simply attached or detached by slipping onto or off sleeve 33. The reduction in diameter of cylindrical sleeve 39 abuts the end of sleeve 33 of the blowtorch burner.
While there has been described what is at present considered to be preferred embodiments of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention. It is to be understood that the above-described arrangements are simply illustrative of the application of the principle of the invention and numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof. It is, therefore, intended that the matter contained in this description and the accompanying drawings be considered as illustrative and not as limiting.
What is claimed is:
1. In a blowtorch burner having a gas-supply means, a jet pump with a diffuser and an inlet section including peripheral air inlet ports, a gas conduit means from the supply means leading into said inlet section, a central mixing tube of reduced diameter and a substantially progressively widening diffuser outlet, a cylindrical sleeve forming an extension of said diffuser outlet, thermodistribution control means fitted over the outlet end of the sleeve forming an extension of the diffuser outlet, and a flame holder positloned in said sleeve,
the improvement which comprises:
biased ring means between said cylindrical sleeve and said control means fitted thereover for slidably securing the thermodistribution control means onto said sleeve.
2. A blowtorch burner according to claim 1, wherein the thermodistribution control means includes a cylindrical sleeve forming a further extension of the diffuser outlet having an outlet section including peripheral exhaust ports, the thermodistribution control means having external to the outlet section fixedly attached a soldering tip.
3. A blowtorch burner according to claim 2, in which the cylindrical sleeve has a cylindrical outlet exhaust section of reduced diameter forming a thermoconcentrator.
4. A blowtorch burner according to claim I, wherein the means of slidably securing the thermodistribution control means includes a longitudinally embossed cylindrically split tolerance ring for insertion into the space defined by the outer surface of the sleeve forming an extension of the diffuser outlet and said sleeve forming a further extension of the diffuser outlet to frictionally hold the thermodistribution control means.