| 摘要 |
An electrical circuit operating system for controlling operating of an aluminum processing bath includes an electrical contact device. The electric al contact device includes a tubular body of an electrically insulating materia l, the body including at least one circumferential slot receiving a seal member. A fastener is disposed in the tubular body. A conductive biasing element has a compressed connecting end engaged with the fastener, and an extending portio n axially protracting from the compressed connecting end. A piston forms a portion of an electrical circuit. The electrical circuit is closed when the conducti ve biasing element is contacted by the piston. A piston rod is connected to the piston and is displaceable with the piston, the piston rod operable to break a crust of the aluminum processing bath.
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