Abstract: An improved valve construction for a gas torch. The torch includes a valve body having a fuel conducting passage which provides communication between a container for pressurized fuel, such as propane, and an outlet tube. An opening in the valve body intersects the gas passage and receives a valve which controls the flow of gas through the passage. The stem of the valve is provided with an external thread which is engaged with an internal thread in the opening, and the outer surface of the valve body bordering the opening is staked to deform the outer portion of the internal thread to prevent the valve from being threaded out of the opening.

Abstract: Component parts of a steel container for storing a gas, specifically a mixture of stabilized methylacetylene and propadiene (C.sub.3 H.sub.4), are joined by a brazing alloy consisting of about 48% to 67% by weight copper; about 4.5% to about 7% by weight phosphorous and the balance nickel. During manufacture of the container, component parts may be joined either by brazing the joint with the specified alloy in wire or rod form or by applying to the joint a brazing paste comprising the specified metals unalloyed in powdered form and heating the joint in a furnace to melt and alloy the metals to form the joint. The brazing alloy has desirable metallurgical characteristics and is nonreactive to exposure to the specified gas stored in the container. The brazing paste has characteristics which enhance its utility for mass production techniques.

Abstract: A torch for use with a portable tank of pressurized liquified combustible gas, such as MAPP type gas, comprises a regulator valve assembly, including a valve body having a gas outlet therein, and a burner assembly, including a combined burner tube, venturi member and orifice member, which is releasably and adjustably connected in sealed relationship to the outlet on the valve body by frictional retaining means so as to enable quick and easy pull-out and push-in substitution of different-sized burner assemblies, while still allowing for rotational adjustment or positioning of an installed burner assembly.