Abstract: A voltage regulator having a multiple of main stages and at least one accelerated voltage regulator (AVR) bridge is provided. The main stages may respond to low frequency current transients and provide DC output voltage regulation. The AVR bridges are switched much faster than the main stages and respond to high frequency current transients without regulating the DC output voltage. The AVR bridge frequency response range can overlap with the main stage frequency response range, and the lowest frequency to which the AVR bridges respond may be set lower than the highest frequency to which the main stages respond.

Abstract: A tool includes a barrel, a guiding wire, and an electrically conductive member. The barrel is made of electrically conductive material. The guiding wire is disposed in the barrel. The barrel and the guiding wire are directly or indirectly connected to two opposite electrodes of a power source. The electrically conductive member is connected to an outer periphery of the guiding wire and is electrically connected to the guiding wire. The electrically conductive member is disposed between the barrel and the guiding wire and is spaced from the barrel. When the power source is activated, an electric arc is generated between the electrically conductive member and the barrel.

Abstract: A tool includes a barrel, a guiding wire, and an electrically conductive member. The barrel is made of electrically conductive material. The guiding wire is disposed in the barrel. The barrel and the guiding wire are directly or indirectly connected to two opposite electrodes of a power source. The electrically conductive member is connected to an outer periphery of the guiding wire and is electrically connected to the guiding wire. The electrically conductive member is disposed between the barrel and the guiding wire and is spaced from the barrel. When the power source is activated, an electric arc is generated between the electrically conductive member and the barrel.

Abstract: A tool includes a barrel, a guiding wire, and an electrically conductive member. The barrel is made of electrically conductive material. The guiding wire is disposed in the barrel. The barrel and the guiding wire are directly or indirectly connected to two opposite electrodes of a power source. The electrically conductive member is connected to an outer periphery of the guiding wire and is electrically connected to the guiding wire. The electrically conductive member is disposed between the barrel and the guiding wire and is spaced from the barrel. When the power source is activated, an electric arc is generated between the electrically conductive member and the barrel.

Abstract: A tool having switch with support function includes a main body and a switch. The main body extends along an axis. The switch is slidably mounted on the main body and is slidable between an ON position and an OFF position. The switch includes a base slidably connected to the main body. The switch is adapted to stand on a surface stably, and the main body is able to be supported on the surface by the switch. The switch has a supporting structure which projects from the base and extends transversely to the axis. The supporting structure has an abutting end disposed on a first plane which extends transversely to the axis. When the switch stands on the surface, the surface bears the switch from the supporting structure.

Abstract: A gas heating device includes a main body defining a combustion chamber, a catalyst disposed in the combustion chamber, and an electric thermal device providing electric thermal energy to heat the catalyst and disposed in the combustion chamber and adjacent to a side of the catalyst.

Abstract: A gas torch head includes a main body, a burner tube releasably inserted into the main body, and a retainer configured to secure the main body and the burner tube together selectively. The retainer is mounted on one of the main body and the burner tube and is movable between a first position engaging with the other of the main body and the burner tube and a second position disengaging from the other of the main body and the burner tube, respectively.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A gas heating device includes a main body defining a combustion chamber, a catalyst disposed in the combustion chamber, and an electric thermal device provides electric thermal energy to heat the catalyst and disposed in the combustion chamber and adjacent to a side of the catalyst.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A safety valve device in a gas burning apparatus includes a valve body and an adjusting member. The valve body has an inlet port and an outlet port and defining a receiving room disposed between the inlet port and the outlet port. The receiving room opens to and in communication with the inlet port and the outlet port. The adjusting member is received by the receiving room. The adjusting member deforms in responsive to temperature from a first shape when in a normal mode into a second shape when in a protection mode and vice versa. The adjusting member is in the normal mode when experiencing a temperature not greater than a set temperature. The adjusting member is in the protection mode when experiencing a temperature greater than the set temperature.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A gas torch head includes a main body, a burner tube releasably inserted into the main body, and a retainer configured to secure the main body and the burner tube together selectively. The retainer is mounted on one of the main body and the burner tube and is movable between a first position engaging with the other of the main body and the burner tube and a second position disengaging from the other of the main body and the burner tube, respectively.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A gas hot air gun head includes a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end. Further, a flow-guiding device connects to the fluid outlet end of the fuel supply device and includes a combustor. The combustor connects to the fuel supply device. The combustor includes a combustion chamber extending therethrough. The combustion chamber includes first and second flow-guiding plates engaging therein and separating from each other in an axial direction. The first flow-guiding plate includes a plurality of first holes extending therethrough. The second flow-guiding plate includes a plurality of second holes extending therethrough. A centerline of one of the plurality of first holes offsets from centerlines of the plurality of second holes.

Abstract: A device includes a filling valve, a sleeve, an absorbing member, and a gas control unit. The filling valve can be engaged for filling liquid gas. The sleeve includes a fluid passing section that enables liquid gas outside to flow therein. The absorbing member can absorb liquid gas and is disposed in the sleeve. The gas control unit includes a main body, a gas inlet and flow rate adjusting mechanism, and a gas outlet mechanism. The gas inlet and flow rate adjusting mechanism includes an adjustably movable valve and a first air seal. The first air seal is mounted between the adjustably movable valve and the main body to prevent liquid gas from passing therebetween. The adjustably movable valve is in fluid communication with the gas outlet mechanism such that vaporized gas emitted from the absorbing member is discharged from the device from the gas outlet mechanism.

Abstract: A device includes a filling valve, a sleeve, an absorbing member, and a gas control unit. The filling valve can be engaged for filling liquid gas. The sleeve includes a fluid passing section that enables liquid gas outside to flow therein. The absorbing member can absorb liquid gas and is disposed in the sleeve. The gas control unit includes a main body, a gas inlet and flow rate adjusting mechanism, and a gas outlet mechanism. The gas inlet and flow rate adjusting mechanism includes an adjustably movable valve and a first air seal. The first air seal is mounted between the adjustably movable valve and the main body to prevent liquid gas from passing therebetween. The adjustably movable valve is in fluid communication with the gas outlet mechanism such that vaporized gas emitted from the absorbing member is discharged from the device from the gas outlet mechanism.