Power pack trolley and captivation system

A further trolley for use in combination with a power pack trolley including a frame, wheels attached to the frame and adapted to ride along a track, means for driving at least one of said wheels, a power pack, and a take-off disposed to provide energy from the power pack to drive at least one of the wheels of another trolley, said further trolley comprising:

• transmissions equipment disposed to draw energy from the power pack through said take-off;
• wheels;
• and
• a motor disposed to drive at least one of the wheels of said further trolley.

A conveyor comprising:

• a pair of longitudinally extending tracks;
• and
• a plurality of trolley, each trolley supported on the tracks by wheels for movement along the tracks, said plurality including
• a power pack trolley having a power pack to provide energy and a motor to drive at least one of the wheels of said power pack trolley, said motor drawing energy from said power pack;
• at least one further trolley having a motor to drive at least one of the wheels of said further trolley, and
• coupling means operatively connecting said further trolley and said power pack so that the motor of said further trolley draws energy from said power pack.