Electric driving apparatus for a wheel chair

Claim 1

ELECTRICAL DRIVING APPARATUS FOR A WHEEL CHAIR OF THE TYPE HAVING A FRAME STRUCTURE FOR SUPPORTING A PERSON, A PLURALITY OF WHEELS AT LEAST TWO OF WHICH ARE DISPOSED ON OPPOSITE SIDES OF THE FRAME TO CONSTITUTE DRIVING WHEELS, AND CONTROL MEANS INCLUDING A JOY-STICK TYPE CONTROL MEMBER FOR ACTUATING LEAF SWITCHES WHICH ARE CONNECTED TO THE ELECTRICAL DRIVING APPARATUS TO CONTROL BOTH THE DRIVING AND STEERING OF THE WHEEL CHAIR BY THE RELATIVE ROTATION OF THE DRIVING WHEELS, THE ELECTRICAL DRIVING APPARATUS FOR SUCH A CHAIR INCLUDING IN COMBINATION, A PAIR OF REVERSIBLE ELECTRIC MOTOR MEANS EACH HAVING AN ASSOCIATED DRIVE DRUM ROTATABLE THEREBY, FIRST AND SECOND SUPPORT MEANS ADAPTED TO INDIVIDUALLY CARRY SAID PAIR OF MOTOR MEANS AND ASSOCIATED DRIVING DRUMS THEREON, AN ADJUSTABLE FRAME ASSEMBLY HAVING FIRST AND SECOND PAIRS OF ADJUSTABLE FRAME MEMBERS, SAID FIRST PAIR OF ADJUSTABLE FRAME MEMBERS BEING ADAPTED TO MOUNTABLY RECEIVE SAID FIRST SUPPORT MEANS ON ONE MEMBER THEREOF AND TO MOUNTABLY RECEIVE SAID SECOND SUPPORT MEANS ON THE OTHER MEMBER THEREOF, SAID FIRST PAIR OF FRAME MEMBERS WHEN ATTACHED TO SAID WHEEL CHAIR BEING DISPOSED WITHIN THE SPACE DEFINED BY THE PLANES OF ROTATION OF SAID WHEELS AND ADJACENT THERETO TO PLACE SAID DRIVE DRUMS IN THESE PLANES OF ROTATION FOR ENGAGEMENT WITH THE DRIVING WHEELS, SAID SECOND PAIR OF ADJUSTABLE FRAME MEMBERS BEING DISPOSED ACROSS SAID FIRST PAIR OF MEMBERS AND BEING CONNECTED THERETO TO SERVE AS