Gears 4, 5, 6, 7 and 8 are keyed to shaft 1, and are in constant engagement with gears 9, 10, 11, 12 and 13 which rotate freely about shaft 2. Sliding key 3 can be shifted along shaft 2, keying one of the gears to this shaft. The sum of the pitch radii is the same for all the pairs of meshing cone gears. The transmission ratio for the position of key 3 shown is i₁₂=-z₁₀/z₅ where z₅ and z₁₀ are the numbers of teeth of gears 5 and 10. When driving shaft 1 rotates, driven shaft 2 can have any one of five speeds depending on which gear, 9, 10, 11, 12 or 13, is engaged by key 3.
$2860$CxG,SR$