SERVO

CONTROL EQUIPMENT, MEASURING INSTRUMENTS AND TESTING DEVICES-NAMELY, ANALYZING AND TESTING APPARATUS FOR SERVOMECHANISMS; BOLOMENTERS, OSCILLOSCOPE INDICATORS; AUTOMATIC PILOTING EQUIPMENT, INCLUDING HOMING DEVICES AND ASSOCIATED SENSING AND MEASURING ELEMENTS FOR GUIDANCE OF AIRCRAFT; RADIO DIRECTION FINDERS; TEMPERATURE AND RADIATION MEASURING CALIBRATING AND CONTROL APPARATUS; CONTROL SYSTEM SYNTHESIS AND TEST EQUIPMENT INDUSTRIAL PROCESS MEASUREMENT AND CONTROL APPARATUS