Friction clutch 3 can be shifted so that its cones slide along square guide a of shaft 1 to engage either gear 18 or 19 which rotate freely about this shaft. Gear 19 is in constant engagement with idler gear 21 which, in turn, meshes with gear 22. Gear 18 is in constant engagement with gear 20. Gears 22 and 20 are keyed to shaft 23. Gears 5 and 6 form a cluster that slides along square guide b of shaft 23 and can be shifted into engagement with gear 12 or 13 which are keyed to shaft 24. Two clusters, consisting of gears 7 and 8 and gears 9 and 10 slide along square guides c and d of shaft 24 and can be shifted into engagement with either gear 14, 15, 16 or 17 which are keyed, together with gear 25, to sleeve g. Sleeve g rotates freely about shaft 2. Gear 25 is in constant engagement with gear 26 which is keyed to intermediate shaft 27. Clutch 28 slides along square guide f of sleeve g. Gear 29 is keyed to shaft 2. Clutch 28 is engaged to gear 29 by means of shifting lever 4 which turns about fixed axis A. Simultaneously, gear 11 is shifted out of engagement with gear 29 by sliding it along square guide e of shaft 27. When clutch 28 is disengaged, gear 11 is shifted into engagement with gear 29. When driving shaft 1 rotates, driven shaft 2 can have any one of sixteen different speeds depending on the engagements of clutches 3 and 28 and of the sliding gears.
$2868$CxG,SR$