In this task, you need to Translate Czech text to English.

Vynález se týká zapalovací svícky pro zapálení palivové smesi ve válci zážehového spalovacího motoru, která obsahuje pevnou elektrodu (2), uloženou v pouzdru (1) na jednom konci svícky, pricemž pevná elektroda (2) je ve výchozí poloze ve styku s jedním koncem odpružené pohyblivé elektrody (3), jejímuž druhému konci je prirazen elektromagnet spráhnutelný se zdrojem elektrické energie, pricemž elektrody (2, 3) jsou spraženy se zdrojem elektrické energie. Mezi pouzdrem (1) a elektromagnetem na horním konci svícky je situován dutý žebrovaný chladic (7), jehož dutinou prochází pohyblivá elektroda (3).

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The present invention relates to a spark plug for ignition of fuel mixture in spark ignition engine cylinder, said spark plug comprising a fixed electrode (2) disposed within a casing (1) at one end of the spark plug, wherein said fixed electrode (2) is in its initial position in contact with one end of a spring-loaded movable electrode (3) having its other end assigned with an electromagnet connected with a electric power supply unit, wherein said electrodes (2, 3) are connected to the electric power supply unit. Said movable electrode (3) passes through a hollow ribbed cooler (7) that is situated between the casing (1) and the electromagnet disposed at the spark plug upper end.