Trailer with motorized jack assembly

Claim 1

IN A TRAILER TYPE VEHICLE HAVING A TONGUE SUPPORTING ONE END OF SAID TRAILER AND ADAPTED TO BE CONNECTED TO ANOTHER VEHICLE, A JACK ASSEMBLY INTEGRALLY CONNECTED TO SAID TONGUE FOR SUPPORTING SAID TONGUE WHEN DISENGAGED FROM SAID OTHER VEHICLE, SAID JACK ASSEMBLY INCLUDING A FIRST MEMBER THREADABLY ENGAGING IN TELESCOPING RELATIONSHIP A SECOND MEMBER, SAID SECOND MEMBER ADAPTED TO MOVE LONGITUDINALLY VERTICALLY RELATIVE TO SAID FIRST MEMBER AND SAID TONGUE UPON SAID FIRST MEMBER BEING ROTATED, SAID SECOND MEMBER DISPOSED WITH ITS OUTER END OPPOSITE SAID FIRST MEMBER EXTENDING DOWNWARDLY, AND THE OUTER END OF SAID FIRST MEMBER OPPOSITE SAID SECOND MEMBER EXTENDING UPWARDLY, A BATTERY OPERATED MOTOR MOUNTED ON SAID TONGUE ADJACENT SAID FIRST MEMBER AND MEANS ROTATABLY COUPLING SAID MOTOR TO SAID FIRST MEMBER TO EXTEND AND RETRACT SAID SECOND MEMBER RELATIVE TO SAID FIRST MEMBER THEREBY RAISING AND LOWERING SAID TRAILER TONGUE, AN ELECTRICAL CIRCUIT INCLUDING A POWER SUPPLY ON SAID TRAILER FOR OPERATING SAID MOTOR AND A SWITCH MEANS FOR REVERSING THE OPPOSITE DIRECTIONS TO LOWER AND RAISE SAID ROTATION IN OPPOSITE DIRECTIONS TO LOWER AND RAISE SAID TONGUE, SECOND AND THRID SWITCH MEANS IN SAID ELECTRICAL CIRCUIT BEING NORMALLY CLOSED, SWITCH ACTUATING MEANS HAVING A MEMBER MOVABLY MOUNTED ON A THREADABLE SHAFT AND POWERED BY SAID FIRST MEMBER FOR MOVEMENT IN OPPOSITE DIRECTINS ALONG SAID THREADED SHAFT, SAID SWITCH ACTUATING MEANS ADAPTED TO MOVE BACK AND FORTH ON SAID THREADED SHAFT TO ALTERNATELY ENGAGE SAID SECOND AND THIRD SWITCHES TO OPEN SAID SECOND AND THIRD SWITCHES UPON SAID FIRST MEMBER HAVING ROTATED A PREDETERMINED NUMBER OF REVOLUTIONS THEREBY OPENING SAID ELECTRICAL CIRCUIT AND STOPPING SAID MOTOR UNTIL SAID SWITCH MEANS IS AGAIN ACTUATED TO REVERSE THE POLARITY THROUGH SAID MOTOR.