Chain-driven articulating frame vehicle

Claim 1

A STEERABLE VEHICLE COMPRISING: A FRONT FRAME SECTION SUPPORTING A POWER PLANT, A REAR FRAME SECTION HINGED TO SAID FRONT SECTION FOR SWING MOVEMENT ABOUT A VERTICAL AXIS, MEANS FOR SWINGING THE REAR SECTION RELATIVE TO THE FRONT SECTION ABOUT SAID HINGE AXIS FOR STEERING THE VEHICLE, A RESPECTIVE SET OF TWO TRACTION WHEELS CARRIED BY EACH FRAME SECTION FOR ROTATION ABOUT A COINCIDING TRANSVERSE HORIZONTAL AXIS, ONE WHEEL AT EACH OF THE TWO SIDES OF THE SECTION, A CROSS-SHAFT ON EACH FRAME SECTION JOURNALED FOR ROTATION ABOUT AN AXIS PARALLELING THE ROTARY AXIS OF THE RELATED TRACTION WHEELS, STUB SHAFTS JOURNALED AT THE INNER ENDS OF THE FRAME SECTIONS FOR ROTATION ABOUT TRANSVERSE HORIZONTAL AXES WHICH TRAVERSE THE HINGE AXIS OF THE SECTIONS AND COINCIDE WHEN THE LONGITUDINAL MEDIAN LINES OF THE FRAME SECTION ARE IN AN IN-LINE RELATION, SAID STUB SHAFTS HAVING THEIR INNER ENDS SPACED APART, A SPINDLE EXTENDING BETWEEN AND CONNECTED BY UNIVERSALS WITH SAID INNER ENDS OF THE STUB SHAFTS, DRIVING CONNECTIONS FROM THE POWER PLANT OF BOTH THE CROSS-SHAFT AND THE STUB SHAFT OF THE FRONT SECTION, A DRIVING CONNECTION FROM THE STUB SHAFT OF THE REAR SECTION TO THE CROSS-SHAFT OF THE REAR SECTION, AND INTERMESHING MEANS ON THE CROSS-SHAFTS AND THE TRACTION WHEELS PRODUCING A REDUCTION FINAL DRIVE TO EACH OF THE WHEELS, SAID REDUCTION FINAL DRIVES COMPRISING A RESPECTIVE SPROCKET WHEEL FIXED TO EACH END OF EACH CROSSSHAFT AND HAVING THE TEETH ENGAGING IN THE INTERSTICES OF A RING-SHAPED LENGTH OF CHAIN RIGIDLY SECURED TO THE INSIDE FACE OF THE RELATED TRACTION WHEEL CONCENTRIC TO THE ROTARY AXIS OF THE WHEEL.