Positioning device for a rotatable member

Claim 1

IN A DEVICE FOR RETURNING A ROTATABLE MEMBER TO A FIRST PREDETERMINED ROTATIONAL POSITION FROM A SECOND POSITION ANGULARLY SPACED THEREFROM COMPRISING A DRIVING MEMBER SECURED TO SAID ROTATABLE MEMBER AND ROTATABLE THEREWITH AND HAVING A PORTION EXTENDING RADIALLY OUTWARDLY FROM SAID ROTATABLE MEMBER, A FIRST ELONGATED ELEMENT SECURED TO SAID PORTION OF SAID DRIVING MEMBER AND EXTENDING AXIALLY OUTWARDLY THEREFROM IN SPACED PARALLEL RELATIONSHIP WITH THE AXIS OF SAID ROTATABLE MEMBER, A STATIONARY MEMBER, A SECOND ELONGATED ELEMENT SECURED TO SAID STATIONARY MEMBER AND EXTENDING AXIALLY THEREFROM IN SPACED PARALLEL RELATIONSHIP WITH SAID FIRST ELONGATED ELEMENT AND SAID AXIS, SAID FIRST AND SECOND ELONGATED ELEMENTS AND SAID AXIS BEING IN GENERAL RADIAL ALIGNMENT WHEN SAID ROTATABLE MEMBER IS IN SAID FIRST POSITION, AND SPRING MEANS HAVING TWO SPACED ELONGATED PORTIONS NORMALLY BIASED TOWARD AND RESPECTIVELY RESILIENTLY ENGAGING OPPOSITE SIDES OF SAID ELONGATED ELEMENTS WHEN SAID ROTATABLE MEMBER IS IN SAID FIRST POSITION WHEREBY ROTATION OF SAID ROTATABLE MEMBER TOWARD SAID SECOND POSITION CAUSES SAID FIRST ELONGATED ELEMENT TO DEFLECT ONE OF SAID SPRING MEANS PORTIONS; THE IMPROVEMENT WHEREIN ONE OF SAID ELONGATED ELEMENTS HAS ONE TRANSVERSE DIMENSION GREATER THAN THE NORMAL SPACING BETWEEN SAID SPRING MEANS PORTIONS WHEN SAID ROTATABLE MEMBER IS IN SAID FIRST POSITION AND ANOTHER TRANSVERSE DIMENSION LESS THAN SAID NORMAL SPACING, SAID ONE ELONGATED ELEMENT BEING ADJUSTABLY SECURED TO THE RESPECTIVE MEMBER FOR MOVEMENT SO THAT SIDE SURFACES THEREOF RESPECTIVELY ENGAGE BOTH SAID SPRING MEANS PORTIONS WHEN SAID ROTATABLE MEMBER IS IN SAID FIRST POSITION WHEREBY BOTH OF SAID SPRING MEANS PORTIONS ENGAGE BOTH OF SAID ELONGATED ELEMENTS THEREBY MINIMIZING LOST MOTION OF SAID ROTATABLE MEMBER IN SAID FIRST PORTION THEREOF.