| 摘要 |
Device for equipment of a cell ( 1 ) comprising an electrolytic bath ( 4 ) covered with a crust ( 5 ), with a chisel ( 13 ) that can be moved vertically between a high position in which it is above the crust ( 5 ) and a low position in which the crust ( 5 ) is perforated and in which contact is made with the bath ( 4 ), the device ( 11 ) comprising means of detecting electrical contact between the chisel ( 13 ) and the bath ( 4 ), these means comprising an electrical circuit ( 19 ) capable of making an electrical measurement between the chisel ( 13 ) and a point ( 20 ) in the cell used as an electrical reference, and taking immediate action on the actuator to cause vertical upwards displacement of the chisel when a predetermined value of an electrical measurement is reached. The electrical circuit ( 19 ) is connected to the chisel ( 13 ), to the rod ( 14 ) of the chisel ( 13 ) or to the actuator rod ( 17 ) through connecting means capable of creating a point contact ( 24 ) at least one point between the circuit ( 19 ) and the chisel ( 13 ), the rod ( 14 ) of the chisel ( 13 ) or the actuator rod, these connecting means ( 23 ) being acted upon by elastic means ( 25 ) pushing them towards the chisel ( 13 ), the rod ( 14 ) of the chisel ( 13 ) or the actuator rod ( 17 ) respectively.
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