» Kohlrausch Ammeter (0160)

Immagini

DESCRIPTION

Exhibit 160 is a Kohlrausch ammeter, the scheme of which is shown in design 1. It consists of a vertical solenoid S, composed of 24 spirals of insulated wire wound on a cylinder and welded to two terminals T1 and T2 (marked + and- on the wood base). Above the solenoid, there is a brass cylinder inside of which there is a solid iron cylindrical bar F suspended by a vertical spring E and carrying a dial visible through a lateral window in the brass cylinder. In the same window there is a graduated scale which varies from 1 to 10 ampere. When the current to be measured flows in the solenoid, the iron bar magnetized by induction descends inside the solenoid to a position in equilibrium between the attraction of the solenoid magnet field and the extension of the spring E. In this position, the dial indicates the flowing current in amperes.

ISCRIZIONI

D.R.Patent n.o 940

BIBLIOGRAPHY

[1] ORESTE MURANI,"Trattato Elementare di Fisica", VOL II, ULRICO HOEPLI Milano (1906). (Pag. 530-531)

Dati Catalografici