Rotation is transmitted from driving gear 1, rotating about fixed axis A, directly to gear 2, freely mounted on shaft 3 and through gears 4 and 5, rotating about fixed axis B-B, to gear 6 which is also freely mounted on shaft 3. Gears 2 and 6 alternately engage sliding clutch member 7, which is keyed on shaft 3, and rotate the shaft in opposite directions. Worm 8 is keyed on shaft 3 and meshes with worm wheel 9 which controls the motion of switching lever 10. Lever 10 is connected by spring 11 to wheel 9. Worm wheel 9 rotates about fixed axis E, and has two arc-shaped lugs a and d which can be adjusted. When, in the rotation of worm wheel 9, lugs b and b' on lever 10 engage lugs a and d, lever 10 is stationary. As soon as the lugs run out of engagement, spring 11 shifts lever 10, sliding clutch member 7 is switched over and shaft 3 is reversed.
$2541$LrG,SE$