| 摘要 |
An apparatus is disclosed for providing more uniform lighter spark wheel actuation. Uniform actuation is facilitated in the apparatus according to the invention by reducing the formation of deep grooves and high ridges in the flint. In one embodiment of the invention, a spark wheel coil formed from wire having at least one substantially flat side is utilized to reduce ridge formation. The spark wheel coil includes pitting in a transversal direction made on the outer surface of the coil. The pitting forms projections which protrude from the core of the coil and which, when contacting a pyrophoric flint while the coil spring is rotated about its axis, produce a tangential cutting across the pyrophoric flint to emit an ignition spark. |
