FIELD: mechanical industry. SUBSTANCE: light guide 3 is provided with removable checker 7 attached to free end of the light guide, hollow cylinder 8 fastened to the checker, plunger 9 which is disposed in space of cylinder 8 for translational motion along its axis and adjusting ring 12 which is fixed to case 1 for free rotation. Flexible link 6 is connected with case 1 through adjusting ring 12. Plunger 9 is provided with gadget for its motion made in form of a small rope 10. One end of the rope is connected with plunger 9, and the other end is free. EFFECT: improved efficiency. 1 dwg
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Authors
Dates
1995-01-09—Published
1990-05-25—Filed