Equipotential bars

Cathodes have an effective depositions surface area of 1.67 m and there are 33 cathodes in a cell. A knife switch type is used for the cathode contacts. This type allows the cathode header bar to come in contact with both the clip and the equipotential bar, resulting in a wide contact area. With a self-weight contact type, the contact resistance is increased because the weight of the cathode is light at the initial stage of electrolysis. To minimize this disadvantage, the knife switch type has been consistently in use to the present time. 

The anode is inade of 0.75% Ag-Pb alloy. It is cast with holes, and 34 anodes are charged in a cell. The anode is a self-weight contact type. A copper strip of 140 mm width is used as the equipotential bar. The center to center distance between the anodes is 75 mm. 

Potential as a function of position (X) along the bar is shown in Fig, lb. The zero of the potential scale is chosen as the low resistivity plate which is an equipotential surface. The left hand side of the high resistivity electrode is held at V +Vq while the right hand side is held at Vq, One particular voltage is of special interest for all LCD s the threshold voltage Vc Figure 2 shows that the optical properties of an LCD exhibit a threshold behavior at The threshold voltage is plotted on... 

Fig. la. The physical design of Soref s analog bar graph is shown. The long substrate has a high resistivity transparent conductor so that a potential drop Vi is produced down the substrate from X=0 to X=L. The narrow substrate has a low resistivity transparent conductor so that it is an equipotential plane at zero potential. 

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