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DEVICES FOR PRODUCING IGNITION SPARKS WHEN FALLING ON A PYROPHORIC FLINT
DEVICES FOR PRODUCING IGNITION SPARKS WHEN FALLING ON A PYROPHORIC FLINT
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机译:坠落在火化石上时产生点火火花的设备
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摘要
A device for producing ignition sparks when falling on a pyrophoric flint includes a coil spring having at least one coil which is provided with a pit in a transversal or inclined direction on the outer longitudinal line of the coil. The pit is formed of "saw-teeth" type projections which protrude from the original core of the coil, thereby forming on the outer surface of the coil spring cutting projections which, when falling on a pyrophoric flint applied to the outside of the coil spring and when the coil spring turns about its axis, produce a tangential hauling of the pyrophoric flint thereby emitting an ignition spark.
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