Reversible power drive and steering structure

Claim 1

IN COMBINATION, A PAIR OF SPACED DRIVEN SHAFTS; A JACK SHAFT DISPOSED BETWEEN THE DRIVEN SHAFTS IN END-TOEND, AXIALLY ALIGNED RELATIONSHIP THERETO, EACH DRIVEN SHAFT HAVING A ROTATABLE CONTROL SHIFTABLE ALONG THE JACK SHAFT, EACH CONTROL BEING PROVIDED WITH AN ABUTMENT DISPOSED FOR ENGAGEMENT THEREBY WHEN THE SAME IS SHIFTED IN ONE DIRECTION, THE ABUTMENTS BEING SECURED TO THE JACK SHAFT WHEREBY THE CONTROLS BECOME CONNECTED WITH THE JACK SHAFT FOR ROTATION THEREWITH WHEN THE CONTROLS ARE FRICTIONALLY BOUND AGAINST THEIR ABUTMENTS, EACH CONTROL BEING PROVIDED WITH A FIXTURE DISPOSED FOR ENGAGEMENT THEREBY WHEN THE SAME IS SHIFTED IN THE OPPOSITE DIRECTION WHEREBY THE CONTROLS ARE HELD AGAINST ROTATION WHEN THE SAME ARE FRICTIONALLY BOUND AGAINST THEIR FIXTURES; AN OPERABLE CONNECTION WITH THE JACK SHAFT BETWEEN EACH CONTROL AND ITS CORRESPONDING DRIVEN SHAFT COMPRISING SUN AND PLANET STRUCTURE INCLUDING A SUN SPROCKET WHEEL SECURED TO THE JACK SHAFT, FOR ROTATION THEREWITH, A NUMBER OF PLANET SPROCKET WHEELS ROTATABLE ON THE CONTROL ABOUT AXES PARALLEL WITH THE AXES OF THE SUN WHEEL AND THE SHAFTS, AND ADAPTED TO ROTATE WITH THE CONTROL AROUND THE SUN WHEEL ALONG A PATH CONCENTRIC WITH THE LATTER AND WITH HE JACK SHAFT, A CONTINUOUS CHAIN CONNECTING THE SUN WHEEL WITH THE PLANET WHEELS FOR ROTATION OF THE LATTER OPPOSITELY TO THE SUN WHEEL, AND A CHAIN AND SPROCKET WHEEL UNIT COUPLING ONE OF THE PLANET WHEELS WITH THE DRIVEN SHAFT, WHEREBY WHEN THE CONTROL IS CONNECTED WITH THE JACK SHAFT, THE PLANET WHEELS ARE HELD AGAINST ROTATION ABOUT THEIR AXES AND THE DRIVEN SHAFT IS DRIVEN BY THE JACK SHAFT IN THE SAME DIRECTION THEREWITH, AND WHEN THE CONTROL IS HELD AGAINST ROTATION, THE PLANET WHEELS AND THE DRIVEN SHAFT ARE DRIVEN BY THE JACK SHAFT IN A DIRECTION OPPOSITE TO THAT OF THE JACK SHAFT, AND WHEN THE CONTROL IS PERMITTED TO ROTATE FREELY WITH RESPECT TO THE JACK SHAFT, THE DRIVING CONNECTION BETWEEN THE SHAFTS IS BROKEN; AND MECHANISM FOR EACH CONTROL RESPECTIVELY AND COUPLED THEREWITH FOR SHIFTING THE SAME WHEREBY THE ROTATION OF THE DRIVEN SHAFTS MAY BE SEPARATELY CONTROLLED IN EITHER DIRECTION.