A device used to ignite the gases flowing from a welding torch.
The spark lighter, probably the safest, simplest and most commonly used lighter, consists of a piece of flint and a short steel file mounted at opposite ends of a U-shaped piece of spring wire. The spring action causes the flint to scratch over the file, creating a spark which ignites the gas flowing from the torch.
When using a lighter of any type, the torch must be directed away from the operator, other personnel, and flammable material.