Reversible gearbox having user selectable inputs for operation of an output in opposing directions

A reversible gearbox comprising:

• a frame;
• a gear train carried on the frame and comprising:
• a first input gear rotatably mounted on the frame for rotation about a first axis;
• a second input gear rotatably mounted on the frame for rotation about a second axis parallel to the first axis and arranged within the gear train in a counter-rotational relationship with the first input gear, the input gears being arranged for selective coupling of either one thereof to a drive source rotatable in a predetermined direction;
• and
• at least one output gear arranged within the gear train for driven rotation of the output gear in opposite directions depending on which of the first and second input gears is driven in the predetermined direction by the drive source;
• wherein the first and second input gears are disposed on first and second hollow input shafts respectively, into each of which a mating shaft is insertable for use in establishing a connection of the respective input gear to the drive source.