Luggin tip block assembly and use in electrolytic cells

Claim 1

Apparatus for use in the determination of half-cell voltages of operating electrodes which apparatus consists essentially of a block of non-conductive material having at least one passageway therein, which passageway consists essentially of a first channel and a second channel, said first channel, at one end extending through one wall of said block and, at the opposite end, terminating within said block in communication with one end of said second channel, said second channel being disposed at a substantially right angle to said first channel, one end of said second channel being in communication with the end of said first channel which terminates within said block and the opposite end of said second channel extending through a wall of said block and terminating in a collar which surrounds the said end of the channel and projects beyond the surface of the said wall of the block, a Luggin Tubulus disposed in said first and second channels, said Tubulus conforming substantially to the dimensions and configurations of said channels, the tip of said Tubulus terminating at the outer surface of said collar and the opposite end of said Tubulus extending beyond the wall of said block through which said first channel extends and being connected to potentiometric means for measuring electrical potential differences.