Device for controlling the travel distance of a chisel in a...

Details Device for controlling the travel distance of a chisel in a... Device for controlling the travel distance of a chisel in a...

2005-09-08

2008-09-30

Bell, Bruce F (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S230300, C204S230800, C204S245000, C204S247000

Reexamination Certificate

active

07429314

ABSTRACT:
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.

REFERENCES:
patent: 4700612 (1987-10-01), Pfister
patent: 5899753 (1999-05-01), Wong
patent: 6436270 (2002-08-01), Sander
patent: 2004/0213323 (2004-10-01), Benjamin
patent: 20 2004 008474 (2004-09-01), None

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