JUMPING LENS OF OBJECTIVE Russian patent published in 1995 - IPC

FIELD: photo engineering. SUBSTANCE: drive mechanism of lobes 1, 2 and 3, 4 is made in form of spring-loaded bell-crank 6 mounted for interaction with control lever 14 through rest 13 fixed rigidly to lever 6. Bell-crank 6 may also interact with cam 12 for setting relative holes through link 10 and finger 11. Pair of lobes 1, 2 and 3, 4 are fixed by hinge connection at opposite arms of bell-crank 6. Lobes of each pair are disposed at different distances from center of rotation of lever 6. Grooves are made in lobes 1, 2 and 3, 4. Each pair is connected with corresponding rest 7 attached rigidly to case 9 through the grooves. EFFECT: improved efficiency. 2 cl, 1 dwg