Through pin a measuring spindle 1 turns bent lever 2 about fixed axis B. This motion is transmitted by gear segment b of lever 2 and pinion 3 to hand 4. Coil spring 5 eliminates backlash in the gearing and holds lever 2 against spindle 1. Spring 6 holds spindle 1 and the sensitive contact against workpiece A. The sensitive contact is retracted to release workpiece A by pressing button 7 which turns lever 8 about fixed axis C. The end of lever 8 retracts spindle 1 .
$1782$GL,M$