Abstract: A terminal and connector assembly for effecting end-to-end electrical and chanical coupling of the ends of large diameter cables without need of rotative alignment. End terminals fixed to the cables have axially projecting stems with knobs at the ends that are received in a complementary recess in a connector body and clamped by a keeper that fills the recess and is secured by U-bolts that are also recessed.

Abstract: A three axis magnetometer is provided with a single calibration checking l lying in a plane disposed at equal angles to each of the three orthogonal axes of sensitivity. Energization of the calibration checking coil with a known current while the calibrated magnetometer is in a known condition of calibration provides sensitivity readings for each of the three axes, which readings provide a standard of comparison for checking the calibration and sensitivity of the magnetometer by similar energization of the coil when the magnetometer is disposed in a remote operational environment.