Portable gas torch
AssigneeVictor Equipment Company
InventorRoger D. Zwicker
Life of this patent
Estimating the term…
Abstract
A portable gas torch has a metal burner tube defining a gas flow passage through which gas is adapted to flow. An igniter wire in the gas flow passage generates a spark to ignite gas flowing through the passage. The torch has a wire holder for positioning the igniter wire in the gas flow passage and a flame holder downstream from the wire holder. The wire holder comprises a central hub having an axial bore and at least one spacer on the hub for contacting an inside wall of the burner tube to position the hub at a predetermined radial location in the gas flow passage. The axial bore is sized to enable the wire to be held at a selected location downstream from the hub. The wire holder comprises a dielectric material to allow a spark to jump to the inside wall of the burner tube.
Claims26
A portable gas torch comprising
- a metal burner tube defining a gas flow passage through which gas is adapted to flow along a longitudinal axis of the tube to an outlet,
- an igniter wire in the gas flow passage having a spark end for generating a spark to ignite gas flowing through the passage,
- a wire holder for positioning the igniter wire in the gas flow passage, and
- a flame holder in the gas flow passage downstream from the wire holder,
- said wire holder comprising a central hub having an axial bore generally parallel to the longitudinal axis of the burner tube and at least one spacer on the hub for contacting an inside wall of the burner tube to position the hub at a predetermined radial location in the gas flow passage,
- said axial bore being sized to enable the spark end of the wire to be inserted through the bore and then held at a selected location downstream from the hub,
- said wire holder comprising a dielectric material whereby a spark from the spark end of the igniter wire will jump to the inside wall of the burner tube even if the spark end is positioned closer to wire holder than to the inside wall of the tube.
A portable gas torch comprising
- a burner tube defining a gas flow passage through which gas is adapted to flow along a longitudinal axis of the tube, said tube having an open end defining an outlet of the torch,
- an igniter wire in the gas flow passage having a spark end for generating a spark to ignite gas flowing through the passage,
- a dielectric wire holder in the burner tube for receiving the igniter wire and positioning the spark end in the gas flow passage, and
- a flame holder in the gas flow passage downstream from the wire holder,
- said wire holder comprising a central hub having an axial bore generally parallel to the longitudinal axis of the burner tube and a plurality of spacers extending from the hub for contacting an inside wall of the burner tube to position the hub at a predetermined radial location in the gas flow passage.
- said axial bore being sized to hold said igniter wire in place by an interference fit such that the spark end of the igniter wire is held a substantially fixed distance downstream from the hub whereby a spark from the spark end of the igniter wire will jump to the inside wall of the burner tube even if the spark end is positioned closer to wire holder than to the inside wall of the tube.
Dependencies are inferred from the claim text.