Abstract: An inshot-gas burner for gas burning furnaces and other gas burning appliances has a flame retention head at the outlet formed from porous ceramic foam with a central opening through which a flame may project. A velocity reducing insert is located within the mixing chamber of the burner for reducing the velocity of the mixture received by the head in the area spaced about the central openings so that the head is radiant in operation. The porosity of the foam is in the order of 20 to 60 pores per inch. When radiant, the head permits the burner to operate at higher primary aerations, and provides faster burning velocity and thus lower residence time, and additionally provides a lower maximum temperature and a stable quiet flame. This permits the burner to emit low amounts of nitric oxide and nitrogen dioxide without increasing the amount of carbon monoxide emissions.

Abstract: A premixed gas burner has a hollow body including a closed end and an entry end into which a combustible gas and air mixture may flow. The body has a multiplicity of apertures through which the mixture may pass from the hollow interior. A burner portal deck is positioned in superposed relationship over the apertures for permitting the gas air mixture to form a controlled flame. A porous woven fabric formed from ceramic fiber having high thermal insulation properties is located above the deck and separates the deck from the flame front formed when the mixture is ignited. The fabric insulates the deck from excessive temperatures, prevents flash back, allows use of conventional stainless steel for the deck and body components and makes possible the manufacture of long burner sections. A long burner section has a number of decks in side-by-side relationship with an insulating fabric mat over the decks for not only providing insulation, but also forms a gasket between the adjacent decks.

Abstract: Gas burners; particularly, apparatus for punching holes or ports in gas burner tubing. The apparatus includes a base and superposed frame, a press head with punch, which is reciprocally mounted in the upper part of the frame and a rotatably driven eccentric shaft which engages, so as to reciprocate the press head. As the press head reciprocates, the punch engages the receiving end of a gas burner tubing which is supported in a tube collar positioned within the lower part of the frame. The trailing end of the tubing is supported upon a tube arbor which is advanced incrementally towards the tube collar, as the punch is reciprocated. The apparatus is characterized by its capability of rapid punching of a longitudinally aligned series of ports in a gas burner tubing, with precise adjustment of port size and distance between ports.

Abstract: A punching apparatus, particularly a device for longitudinally advancing, while punching, a series of longitudinally aligned ports in cylindrical tubing of the type used in gas burners. The apparatus is distinguished by its employment of a single drive system for advancing and punching, together with adjustments for varying the height of the tubing, the depth of the punched port, and the longitudinal spacing between ports.