Abstract: An acceleration sensing device comprises a case, an inertial body supported on a base portion of the case, and an actuating pawl pivotably mounted on an upstanding wall portion of the case and having a first arm on one side of its pivot mounting engageable by the inertial body such that the inertial body can move by its inertia in any direction generally horizontally upon an acceleration of the case and upon so moving pivot the pawl to an active position. A blocking member is movably supported by the wall portion of the case at a location below the pivot mounting of the pawl. The blocking member has a hole, the edge of which is engageable by the inertial body upon its movement horizontally in any direction from the stable position so as to move the blocking member horizontally.

Abstract: A bias ratio levelling apparatus for a worm gear type differential include first and second shafts mounted on a common axis first and second worm gears fixedly provided in the rotational direction at opposed end portions of the two shafts, a first worm wheel directly intersected with the shafts and engaged with the first worm gear, a second worm wheel directly intersected with the shafts and engaged with the second worm gear, a rotatable member for rotatably bearing the first and second worm wheel about a central axis and for rotating first and second worm wheel about the first and second shafts. A spur gear is fixedly connected to each worm wheel for transmitting the rotation of one worm wheel to the other worm wheel by synchronization, and a spacer is interposed between the first and second worm gears and axially fixed to the rotational member in the direction of the first and second shafts.