73752134
Sep 16, 1988
Jul 25, 1989
MECHANICAL AND ELECTRO-MECHANICAL CONTROL UNITS FOR ADJUSTING AND MONITORING THE OPERATIONAL RELATIONSHIP OF MACHINE ELEMENTS; NAMELY, ADVANCE AND RETARD POSITIONING CONTROLS AND PARTS THEREOF, PHASE VARIATORS; TIMING HUBS AND SWITCHES; POSITION INDICATORS AND ROTATIONAL MOVEMENT MONITORS
Electrical and Scientific Apparatus