Circuit, Astatic

A circuit so wound with reference to the direction of the currents pa ing through it that the terrestrial or other lines of force have no directive effect upon it, one member counteracting the other. It may be enclosing an equal area, one of identical shape and disposition with the other, and with the current circulating in opposite directions in each one. Thus each circuit represents a magnetizing turn of opposite polarity and counteracting each other's directive tendency exhibited in a field of force with reference to an axis a c. Another form of astatic circuit is shown in Fig. 86. The portions C, D, lying on opposite sides of the axis of rotation a c, are oppositely acted on by the earth's directive force as regards the direction of their rotation. IMG:8956969607833025625_120F86_87.jpg: Figs. 86 and 87. ASTATIC CIRCUITS.