The purpose of the present invention is to provide a smoke tube boiler which can prevent leakage of mixed gas and exhaust gas through a gap between a mix chamber and an ignition bar assembly. To this end, the smoke tube boiler according to the present invention comprises: a mix chamber having a mixing space, in which a combustion gas and air are mixed, and a flat plate type burner, the mix chamber being disposed on the upper side of a combustion chamber; an ignition bar assembly assembled to pass through one side of the mix chamber and extending across the upper portion of the combustion chamber to the lower side of the flat plate type burner; and a sealing means for preventing the mixed gas in the mixing space and an exhaust gas in the combustion chamber from leaking to the outside through a gap between the mix chamber and the ignition bar assembly.

An invention is provided for creating smoothed, heat-treated glass fragments. The invention includes placing a plurality of heat-treated glass fragments into a tumbling or vibrating apparatus. Each heat-treated glass fragment is formed from glass that has been heated to a temperature of at least 1000° Fahrenheit and rapidly cooled to a temperature below 800° Fahrenheit. The plurality of glass fragments is then tumbled or vibrated for a predetermined period of time such that surfaces of the heat-treated glass fragments are smoother than prior to tumbling. The glass fragments are thereafter removed from the tumbling apparatus, resulting in smoothed, heat-treated glass fragments that have a slightly rounded, bead like-shape and are suitable for direct handling without hand protection. The glass fragments as are able to be provide radiant heat in the temperature range of 400° to 800° Fahrenheit. This temperature range and the use of the heat-treated glass fragments provides for a clean burning fire that virtually eliminates any soot and carbon monoxide while burning.

A “flame show” is responsive to an audio input signal such as music. A base unit including an analog base unit controller circuit is arranged to receive an audio input signal and generate an analog control signal that is responsive to the audio input signal. The analog control signal is distributed, by wire or wireless, to one or more flame display units such as a “tiki torch.” Each flame display unit has a fuel source, and a proportional valve for controlling an amount of fuel supplied to a burner. Preferably, the control signal controls a gate terminal of a MOSFET semiconductor device, which in turn is coupled to control current in the proportional valve each each unit. By deploying multiple flame display units, all coupled to the same base unit, all of the flame display units contribute synchronously to the overall flame show.

An air intake coupling has at least one noise suppression hole formed therein. A gas-air mixer elbow is fluidly coupled to the air intake coupling. A burner box assembly is fluidly coupled to the gas-air mixer elbow via a gas-air plenum box. A heat-exchange tube has a first end that is fluidly coupled to the burner box assembly. A fan is fluidly coupled to a second end of the heat-exchange tube via a cold-end header box.

An air intake coupling has at least one noise suppression hole formed therein. A gas-air mixer elbow is fluidly coupled to the air intake coupling. A burner box assembly is fluidly coupled to the gas-air mixer elbow via a gas-air plenum box. A heat-exchange tube has a first end that is fluidly coupled to the burner box assembly. A fan is fluidly coupled to a second end of the heat-exchange tube via a cold-end header box.

A method for delivering a High-Pressure gas mixture to a High-Temperature torch nozzle. The method includes several steps. A first steps is providing a plurality of gases to a gas mixing chamber. Then there is mixing turbulently the plurality of gases in the gas mixing chamber to form a High-Pressure gas mixture. Next is directing the High-Pressure gas mixture into a flexible gooseneck hose, and then flowing the High-Pressure gas mixture through the flexible gooseneck hose. A further step is delivering the High-Pressure gas mixture to the High-Temperature torch nozzle. And then, there is dispensing the High-Pressure gas mixture out of the High-Temperature torch nozzle at a temperature of between about 3000 degrees Fahrenheit to 6500 degrees Fahrenheit.

A burner assembly includes a plurality of burner units including, on front sides thereof, fuel inlets through which fuel is introduced into the plurality of burner units, in which the plurality of burner units cause a combustion reaction using the introduced fuel, a case to which the plurality of burner units are coupled with a predetermined separation distance therebetween, and a flow passage guide that is coupled to a front side of the case and that includes a plurality of fuel openings corresponding to the fuel inlets of the plurality of burner units, and the flow passage guide is implemented as separate from the case.

A burner assembly includes a plurality of burner units including, on front sides thereof, fuel inlets through which fuel is introduced into the plurality of burner units, in which the plurality of burner units cause a combustion reaction using the introduced fuel, a case to which the plurality of burner units are coupled with a predetermined separation distance therebetween, and a flow passage guide that is coupled to a front side of the case and that includes a plurality of fuel openings corresponding to the fuel inlets of the plurality of burner units, and the flow passage guide is implemented as separate from the case.

A blowtorch includes a casing and a control unit. The control unit includes an activate button and a lock button. The lock button is switchable between a first lock position and an intermediate position, or between the intermediate position and a second lock position. The activate button is switchable between a standby position and an activation position when the lock button is in the intermediate position. The lock button contacts the activate button and restricts the activate button to hold in the activation position when the activate button is in the activation position and the lock button is in the first lock position or the second lock position.

A burner for a metal-melting furnace can releasably receive a tapered plug in sealing engagement with an access passage aligned with an air passage. The burner may be configured to extend through a wall of the metal-melting furnace so that the air passage is through a front face within the furnace and so that the access passage is through a rear face outside of the furnace. The access passage may be aligned with the air passage to permit a rigid structure to be passed through the burner from outside the furnace to dislodge build-up of solidified metal from the air passage. The tapered plug may be moveable between a sealing configuration of being received in a seat to seal the access passage during burner operation and a cleaning configuration of being removed from the seat to expose the access passage for insertion of the rigid structure.