US1730648A - Blowtorch - Google Patents

Description

Oct. 8, 1929. w, DIENER 1,730,648

- BLOWTORCH Filed March 26, 1928 IN VEN TOR.

Patented Oct. 8, 1929 UNITED STATES.

PATENT OFFICE V BLOWTORCH Application filed March 26, 1928. Serial No. 264,695.

These improvements relate to blow torches of the kind in which a preheating of certain parts is required for generating combustible gas from the liquid fuel for starting the working flame.

The chief object of the invention is to provide a construction in which this preliminary generation of gas is accomplished in peculiarly short space of time, with what is prob- 1 ably a minimum amount of fuel consumed,

and with a certainty and effectiveness unusual in such devices prior to my present invention.

It has been appreciated heretofore that high winds and cold weather militate against the successful starting of such torches, and various suggestions have been made to overcome this disadvantage by the provision of covering devices for various parts of the apparatus. That disadvantage, which is quite substantial, is entirely overcome according to these improvements with respect to the torch parts involved in the initial generation of gas, and the present invention in that respect is a very notable improvement over i all. that I am acquainted'with suggested heretofore for such purpose. That feature, however, is somewhat incidental, although important, for the present invention is not so so much primarily directed to protection from outside influences, as wind, rain, sleet, etc., as it is to means providing a better preheating unit or device, namely, meansby which a very intense heat is developed, and rapidlythe provision of something in the nature of a .furnace wherein not only an unusually intense heat is produced, considering the character of the device, but one in which that heat is conserved and so directed thatthe gas generation for working operations isbrought about in unusually large volume and in an unusually brief space of time.

Turning to the drawingsforming a part hereof, Fig. 1 shows a conventional blow torch having these improvements in the form of an attachment or addition operatively ap- 2 is a top view of the device of Fig. 1; Fig. 3 is a front end view of the same; and Fig. 1 is a perspective of the housing member.

pan. plied thereto, parts being broken away; Fig.

The blow torch illustrated, apart from the housing member, may be considered to be of a well-known kind and construction. It is sufficient topoint out that the drip pan 10 contains non-combustible fibrous material 11, such as asbestos; that there is a pump mechanism 12 by which some of the fuel, as gasoline or kerosene, may be forced initially into the flame pan, usually called a drip pan; and that after the gas initially generated is ignited a 0 regulable flame issues through the barrel 13. The object of the flame in the flame pan is to heat the metallic parts below the barrel 11 to such an extent as to volatilize fuel in the feed duct contained in those parts, all as is well understood.

The housing 15 of Fig. 4 is shown as being of thin sheet metal having a narrow saddle part 16 at the top with a hole therein through which extends the threaded end of the stem 7, 17 of the soldering-iron-holder 17 E This saddle-like part 16 conforms to the upper half of the cylindrical barrel 13, and the two oppositely-disposed front, edges 18. of the housing 15 follow around the barrel 13 somewhat, extend forward and terminate in the vertical abutting edges 19 of the front wall 23.

Figs. 1 and 3 show thatat 20 the housing is open to a small extent below the barrel 13. This is in front of the cylindrical cast metal so part 21 forming part of the head, and the opening at 20 provides for draft at this place and insures the development of a strong flame around the front side of the upright part 21 containing part of the fuel feed'duct.

The two oppositely-disposed edges 22 of the housing 15 conform fairly snugly to the shape of the parts of the head immediately adjacent thereto. At 22 these rear edges are shown by dotted lines in Fig. 3 as being so spaced slightly from'each other, forming a narrow opening into the hollow interior of the casing. Such an opening is not essential, but it provides a convenient means for applying a match to light the fuel in the drip -95 The housing walls are shown as having the general contour of the drip pin in horizontal View and the housing walls enter the drip pan 10 and fit therein snugly close to the edges 1 the flame area of the drip pan and forming a combustion chamber, with air-intake openings in the housing adjacent to the drip pan, and with outlet openings leading from the upper portion of the hollow interior of the housing.

4. In a blow torch of the character described having a flame barrel, gas generating parts and a drip pan below said parts for preheating them, the combination therewith of ahousing member held at its lower edge portions within marginal edges of the drip pan and substantially encompassing the flame area thereof and extending upward and encompassing said gas generating parts with a substantially close lit and passing over the top of said barrel, with means at the top of said barrel for holding the housing member rigidly yet releasably in its normal position for use, said housing member having spaced apart air intake openings respectively at a short distance above the upper edge of the drip pan and having outlet openings leading from upper portions of the hollow interior of the casing.

GEORGE W. DIENER.

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