Gear shift

Claim 1

A GEAR SHIFTING MECHANISM COMPRISING A HOUSING, A FIRST SELECTOR LEVER A SECOND SELECTOR LEVER, A SHAFT CARRIED BY SAID HOUSING, SAID SELECTOR LEVERS BEING SUPPORTED BY SAID SHAFT IN GENERALLY PARALLEL, SPACED RELATIONSHIP, SAID SELECTOR LEVERS BEING POSITIONED ABOUT SAID SHAFT FOR PIVOTAL MOVEMENT ON THE AXIS OF SAID SHAFT A GEAR SELECTOR LEVER ENGAGING MEMBER MOUNTED ON SAID SHAFT BETWEEN SAID SELECTOR LEVERS FOR PIVOTAL MOVEMENT ON THE AXIS OF SAID SHAFT PARALLEL TO THE PLANE OF MOVEMENT OF SAID SELECTOR LEVERS AND FOR ROCKING MOVEMENT IN A DIRECTION TRANSVERSE TO ITS PIVOTAL MOVEMENT, SAID FIRST SELECTOR LEVER HAVING MEANS FOR OPERATIVELY CONNECTING IT TO A GEAR SYSTEM WHEREBY, UPON BEING PIVOTALLY MOVED TO A FIRST POSITION, IT ACTS TO SHIFT TO LOW GEAR AND UPON BEING PIVOTALLY MOVED TO A SECOND POSITION, IT ACTS TO SHIFT TO REVERSE GEAR, AND SAID SECOND ACTUATING LEVER HAVING MEANS FOR OPERATIVELY CONNECTING IT TO A THIRD SYSTEM WHEREBY, UPON BEING PIVOTALLY MOVED TO A THIRD POSITION, IT ACTS TO SHIFT TO SECOND GEAR AND UPON BEING PIVOTALLY MOVED TO A FOURTH POSITION, IT ACTS TO SHIFT TO HIGH GEAR, SAID FIRST SELECTOR LEVER HAVING A FIRST OPENING AND SAID SECOND SELECTOR LEVER HAVING A SECOND OPENING IN LATERAL ALIGNMENT WITH SAID FIRST OPENING, SAID ENGAGING MEMBER HAVING A PAIR OF OPPOSITELY-POSITIONED, LATERALLY EXTENDING FIXED SHOES, EACH SHOE BEING CONSTRUCTED AND ARRANGED TO ENTER AND ENGAGE WITH A CORRESPONDING ENGAGEMENT OPENING UPON ROCKING MOVEMENT OF SAID ENGAGING MEMBER IN THE CORRESPONDING DIRECTION, AND A LEAF SPRING MOUNTED ON SAID SHAFT AND BEARING ON SAID ENGAGING MEMBER TO URGE THE CORRESPONDING SHOE THEREOF TOWARD SAID SECOND SELECTOR LEVER, SAID ENGAGING MEMBER BEING ROCKABLE AGAINST THE FORCE OF THE SPRING TOWARD SAID FIRST SELECTOR LEVER, SAID HOUSING INCLUDING A PAIR OF SIDE WALLS, A FRONT WALL AND A REAR WALL, THE FRONT AND REAR WALLS BEING EACH PIVOTAL MOVEMENT OF THE ENGAGING MEANS TO LIMIT THE PIVOTAL MOVEMENT OF THE ENGAGING MEMBER IN OPPOSITE DIRECTIONS.