US 2531174 A
Description (OCR text may contain errors)
Nov. 21, 1950 Filed Aug. 25, 1949 E. A. TOMLIN HOLE BURNING TORCH TIP 2 Sheets-Sheet 1 AWE/[NTO EMILE 4 7D/WL/A/ ZLSELEWL Nmn 25., mm E. A. TUMLKN HOLE BURNING TORCH TIP 2 Sheets-Sheet 2 Filed Aug. 25, 1949 Patented Nov. 21, 1950 UNITED STATES ATENT OFFICE HOLE BURNING TORCH TIP Emile A. Tomlin, Cambridge, Mass.
Application August 23, 1949, Serial No. 111,821
1 Claim. 1
This invention relates to oxy-acetylene torches and more particularly to a hole burning tip for attachment to commercial forms of such torches.
A general object of the invention is to provide a simple yet inexpensive and efficient tip for attachment to a conventional oxy-acetylene torch for cutting or burning circular and elongated holes in metal plates, castings and other structural members.
A further object of the invention is to provide a compact hole burning tip together with suitable guiding means which enables a conventional torch to be used for cutting holes in an accurate and rapid manner without the aid of expensive jigs, fixtures or stands.
A still further object of the invention is to provide a hole cutting tip assembly which, by interchanging the tip portion of such assembly, allows a conventional torch to be used for cuttin holes and slots of various sizes in a rapid and efiicient manner.
Other object of the invention will in part be obvious and will in part appear hereinafter.
The invention accordingly comprises the fea-, tures of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the invention will be indicated in the claim.
For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which:
Fig. 1 is a perspective view of the complete torch tip of my invention;
Fig. 2 is a vertical cross sectional View taken substantially along lines 2-2 of Fig. 3 and showing the combustion gas and oxygen passageways and chambers;
Fig. 3 is a full side elevation of the torch tip as shown in Fig. 1;
Fig. 4 is a side elevation, partly in section, showing the tip held in position by a conventional oxy-acetylene torch which is indicated by dot-dash lines;
Fig. 5 is a side elevation, partly in section, similar to Fig. 4 but showing a modified form of body shape as may be used to attach the tip to some conventional torches;
Fig. 6 is another view, partly in section, similar to Figs. 4 and 5 but showing a further modification in the body shape;
Fig. 7 is a plan view of the front face of the tip showing the relative location of the combustion gas and oxygen outlets;
Fig. 8 is another plan View, similar to Fig. 7, but showing how the combustion gas and oxygen outlets may be further spaced from the center of the tip for cutting holes of larger size; and, Fig. 9 is a plan view of the body portion of the torch tips shown in Figs. 5 and 6, the tip portion having been removed.
Referring to the drawing, the torch tip assembly of my invention comprises a body portion II], a burner tip ll, an adjustable pivot member 12, and a locknut 45.
The body portion ID is cylindrical and its rear end is provided with an externally threaded neck l3 from which extends a conical seat 14 and, as shown in Fig. 4, the neck l3 threads into internal threaded part l5 of a conventional cutting and/or welding torch [8 so that the conical seat M forms a seal against the mating seat I6 of the torch l8 l aving an oxygen chamber l9 directly opposite to the oxygen supply duct 28 of the torch l8 which is not in itself a part of this invention.
An annular groove 2| in the conical seat l4 provides a primary oxy-acetylene or combustion gas chamber 22 which aifords communication with the combustion gas duct 23 of the torch I8.
The body portion I8 is provided with an axial passageway 24 which in itself forms a chamber to conduct oxygen from the chamber [9 to the tip hereinafter described.
An external thread 25 is provided on the periphery of the body H] and the burner tip II is threaded thereto and the holes 26 in the tip and the holes 2i in the body portion serve as anchors for a spanner wrench to tighten or remove the tip from the body portion.
The end of the body I0 is provided with a seat face 28 having formed therein a circular groove forming a secondary combustion gas chamber 29 which is connected to the primary combustion gas chamber 22 by the annular series of combustion gas passageways 3 l.
A cavity or depression 32 is formed in the surface of the tip H which seats against the seat face 28 of the body and this depression forms a secondary oxygen chamber 33 in alinement with the axial oxygen supply passage 24. A series of passageways 34 extend radially from within the depression 32 and angularly through the tip II where they merge with an annular series of oxygen outlets 36 in the front face 35 of the tip spaced equidistant, preferably at and. at a determined distance from the center of the tip.
An annular series of combustion gas passageways 38 are provided in the tip II, and as shown in Figs. 2 and 8, these communicate with the secondary combustion gas chamber 29. The pas-