Coaxial starting motor

摘要

A coaxial starting motor comprises a d.c. motor whose armature has a hollow rotary shaft projected at its end forwardly, and which has a rear end provided with an electromagnetic switch which is arranged to be coaxial therewith, and which has a movable core attracted by a fixed core on energizing an exciting coil to forwardly move a movable rod with the movable core and causing a movable contact supported by the movable rod to get in touch with a fixed contact wherein the electromagnetic switch has a fixed core partitioning a contact chamber and a movable core chamber so as to prevent contact powder from entering the movable core chamber and hamper the sliding motion of the movable core.