Abstract: A flashback arrestor for use in gas cutting or welding equipment includes a porous body which defines a proximal end portion and a distal end portion and which has a plurality of pores. Each of the pores defines a pore size. The pore size is a function of a detonation cell size such that the pore size is increased to reduce a size of the sintered body.

Abstract: A gas cutting torch has a body including an oxygen preheat tube having a first longitudinal axis and a fuel gas preheat tube having a second longitudinal axis. A head is connected to the preheat tubes having an oxygen passage communicating with the oxygen preheat tube, a fuel gas passage communicating with the fuel gas preheat tube, and an outlet for the flow of mixed gases from the torch. A mixing chamber in the head communicates with the oxygen passage and fuel gas passage. The torch has an orifice in the oxygen passage through which oxygen is adapted to flow to the mixing chamber at an increased flow velocity with an accompanying pressure drop. The pressure drop assists in the flow of fuel gas into the mixing chamber for mixture with the oxygen. A diffuser in the head defines a diffuser passage having an inlet region for receiving oxygen and fuel gas from the mixing chamber for flow through the diffuser, and an outlet region for the delivery of oxygen and fuel gas to the outlet of the head.

Abstract: A gas cutting torch has a body including an oxygen preheat tube having a first longitudinal axis and a fuel gas preheat tube having a second longitudinal axis. A head is connected to the preheat tubes having an oxygen passage communicating with the oxygen preheat tube, a fuel gas passage communicating with the fuel gas preheat tube, and an outlet for the flow of mixed gases from the torch. A mixing chamber in the head communicates with the oxygen passage and fuel gas passage. The torch has an orifice in the oxygen passage through which oxygen is adapted to flow to the mixing chamber at an increased flow velocity with an accompanying pressure drop. The pressure drop assists in the flow of fuel gas into the mixing chamber for mixture with the oxygen. A diffuser in the head defines a diffuser passage having an inlet region for receiving oxygen and fuel gas from the mixing chamber for flow through the diffuser, and an outlet region for the delivery of oxygen and fuel gas to the outlet of the head.

Abstract: A pneumatic oxygen conserver for providing oxygen to a patient. The conserver includes a body having a cavity and a main diaphragm dividing the cavity into first and second chambers. A first inlet passage delivers oxygen from an oxygen supply to the first chamber, and a second inlet passage delivers oxygen from the supply to the second chamber. An outlet passage delivers oxygen from the first chamber to the patient. The main diaphragm is movable between a closed position to prevent oxygen flow through the outlet passage and an open position to permit such flow. Vent passaging vents the second chamber. A pressure sensitive valve is connectable to the patient for permitting flow through the vent passaging when the patient inhales and preventing flow through the vent passaging when the patient exhales.

Abstract: A switchover valve for switching over from one supply of pressure fluid to another supply thereof in response to failing or failure of the one supply. The valve has a valve body having two inlets for connection thereto of the respective pressure fluid supplies and an outlet. A valve member is movable in the valve body between a position establishing communication for delivery of fluid from one inlet to the outlet and blocking flow from the other inlet to the outlet and a position establishing communication for delivery of fluid from the other inlet to the outlet and blocking flow from the one inlet to the outlet. The valve member is subject to pressure of fluid supplied to the one inlet for moving it from the first-mentioned position to the second-mentioned position and to pressure of fluid supplied to the other inlet for moving it from the second-mentioned position to the first-mentioned position.

Abstract: An integral gas regulator and flowmeter unit. The unit has a housing body with a high pressure gas inlet, a low pressure gas outlet, and a receptacle. A passage communicates gas to a valve seat in the receptacle. A differential pressure piston having seals at each end is slidably received within the receptacle and is spring biased away from the valve seat. A first end of the piston cooperates with the valve seat for controlling gas flow into the receptacle. A bore within the piston communicates gas from the first end to a second end of the piston. A floating inner flow tube mounted on the second end of the piston receives gas from the bore. A ball is slidably received within the inner flow tube. An outer flow tube overlies the inner flow tube. Both tubes are arranged for being positioned in a normally vertical position and may be marked with graduations for indicating the ball position.

Abstract: An improved heating torch having the usual fuel and oxygen passageways and valves for controlling the flow of the respective components, mixer for mixing fuel and oxygen, and tip for flowing the admixture exteriorly thereof for burning to heat a work piece or the like, the improvement being characterized by a multiple piece tip that is spring loaded such that one or more internals can be spring loaded to be retained within a shell that is affixed to an end piece of the tip. The end piece fastens to the end of an elbow connected with the mixer, and has the shell disposed about the end piece; and one or more tip internals are disposed inside and biased toward their normal assembled position by a spring or the like. Different sized heating tips are readily formed by simply adding internals and larger sized end pieces and shells to form one or more rings of grooves defined by splines that can be easily manufactured and assembled.

Abstract: An improvement in a cutting torch assembly that obviates the tendency to have a flashback and sustained burning immediately adjacent the point of mixing of the fuel with preheat oxygen; including cutting oxygen valve and passageway, preheat oxygen valve and passageway, fuel gas valve and passageway, a head having a tip end for having a tip affixed thereto and having a head passageway for cutting oxygen and a head passageway for the mixture of fuel and oxygen; the improvement being characterized by an integral head mixer having within the head an incoming preheat oxygen passageway and incoming fuel passageway, a mixer disposed within a well in the head and having its central bore aligned with a longitudinally extending passageway in the head and having lateral passageway penetrating through the wall of the mixer and in communication with the fuel annular space of the well, the inlet end of the bore communicating with the preheat oxygen annular space of the well such that the fuel will flow laterally through th

Abstract: An improvement in a pressure regulator including the usual valve body, seat, poppet, adjustable spring having a bottom plate for co-acting with the low pressure diaphragm member. The improvement comprises an improved regulator in which the poppet includes a centering extension shaft extending to the low pressure side of the valve seat and a larger diameter shaft in communication with the high pressure inlet chamber and having the valve seat include centering upper protrusion that closely engages the centering extension shaft of the poppet with at least three and no more than six slots disposed substantially uniform thereabout such that gas can flow about the valve poppet centering extension shaft through the valves without inducing destructive and noisy vibration when gas flow is called for by the regulator.