| 摘要 |
Spark plug for engines with spontaneous ignition consisting of a filament in the form of a winding encased in a ceramic incandescent material, at one end the filament is connected with the protective coating of the spark plug and at the other end with the insulated mandrel for connection to the power lead, in particular, the filament (5) is constructed from a winding of tape with a perpendicular cross-section with the heating surface parallel to the internal surface of the protective coating (7) and encased in a incandescent material (10) which is a transparent substance which melts at the maximum temperature of the spark plug without reaching boiling or attacking glass.<IMAGE>
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