Abstract: A gas appliance, preferably a torch, is provided with an orifice tube stationary with respect to its housing and receptive of combustible gas and an orifice gas-tightly mounted in the orifice tube for movement along the longitudinal axis of the orifice tube. A burner tube in communication with the orifice tube via the orifice is mounted for slidable movement along the longitudinal axis of the orifice tube in conjunction with the orifice to maintain the relative position of the orifice and burner tube during movement along the orifice tube. A valve in the orifice tube is actuatable in response to the movement of the orifice means in one direction to permit gas to pass into the orifice means and in response to the movement of the orifice means in the opposite direction into a rest position to prevent the flow of gas into the orifice means. An igniter is also responsive to the movement of the orifice to effect a spark in the burner tube to ignite gas permitted to pass by the valve.

Abstract: A pressure relief device for a high pressure gas cylinder of the type that is usable for oxy-fuel torches. The device comprises an aperture in the wall of the cylinder and a eutectic solder filling the aperture. The aperture and plug are also positionable in a substantially planar wall portion that is depressed below the surrounding cylinder wall to protect the plug from dropped objects or inadvertent poking and scraping by the user.

Abstract: A portable hand-held oxypropane torch comprising a generally rectangular carrier member supporting an oxygen valve and a propane valve and having an integral handle connected thereto. The oxygen valve is connected in fluid communication to a nozzle conduit. The propane valve is connected to a propane conduit which is connected in gaseous fluid communication with said nozzle downstream from the point where the oxygen valve is connected to the nozzle conduit. The nozzle conduit has a downwardly inclined end portion terminating in a nozzle.