Control system for gear box comprises shaft which carries teeth on sectors spaced along it, shaft being mounted between forks which carry racks at top and bottom, shaft being rotated so that sectors cooperate with either top or bottom racks

摘要

The control system for a gear box comprises a shaft (1) which carries teeth on sectors (S1 - S6) spaced along it. The shaft is mounted between forks (Fa - Fc) which carry racks at the top (C1 - C4) and bottom (C2 -C3). The shaft can be rotated so that the sectors cooperate with either the top or bottom racks.