Design of Potentiometers

This paper discusses potentiometer design under the following headings: I. Early history. II. Factors affecting voltage range. III. Factore affecting potentiometer resistance. IV. Low-voltage potentiometers. V. Analysis of potentiometer errors. VI. Self-checking features of potentiometers. VII. Galvanometer considerations. VIII. Comments on volt-boxes. IX. Deflection potentiometers. X. The potentiometer in industry. No attempt has been made to give the complete history of potentiometer development, as the paper is not intended to be primarly historical. Neither has any attempt been made to include all of the circuits which have been used in high-resistance potentiometers and in the earlier forms of low-resistance potentiometers, as this would require too much time and space. Material of this kind has been limited to the minimum amount necessary to establish the proper background for the discussion of the subject.