Reversible ratchet mechanism

Claim 1

A REVERSIBLE RATCHET MECHANISM COMPRISING: AN INNER MEMBER OF GENERALLY CIRCULAR CROSS SECTION; AN OUTER ANNULAR MEMBER SURROUNDING AND JOURNALLING SAID INNER MEMBER, SAID OUTER MEMBER HAVING AN INNER CIRCUMFERENTIAL SERIES OF TEETH, ONE OF SAID MEMBERS DEING A DRIVE MEMBER, THE OTHER OF THE TWO MEMBERS BEING A DRIVEN MEMBER, SAID INNER MEMBER BEING FORMED WITH A CYLINDRICALLY CURVED RECESS ON ITS OUTER CIRCUMFERENCE WITH THE AXIS OF CYLINDRICAL CURVATURE PARALLEL WITH THE AXIS OF ROTATION OF THE INNER MEMBER, A PAWL IN THE FORM OF A BODY OF THE SAME CYLINDRICAL CURVATURE AS SAID RECESS PERIPHERALLY CUT AWAY TO FORM A LONGITUDINAL SIDE, SAID PAWL HAVING TWO OPPOSITE ENAGEMENT PORTIONS ON OPPOSITE SIDES OF SAID LONGITUDINAL SIDE FOR ALTERNATE ENGAGEMENT WITH SAID TEETH, SAID PAWL BEING JOURNALLED BY SAID RECESS AND BACKED AGINST SAID INNER MEMBER WITH SAIT LONGITUDINAL SIDE FACING OUTWARDLY FROM THE AXIS OF THE INNER MEMBER TO OSCILLATE BETWEEN NE OPERATING POSITION AT WHICH ONE OF SAID TWO ENGAGEMENT PORTIONS COOPERATES WITH SAID TEETH TO PREVENT RELATIVE ROTATION IN ONE DIRECTION BETWEEN THE INNER AND OUTER MEMBERS, AND AN ALTERNATE OPERATING POSITION AT WHICH THE OTHER OF SAID TWO ENGAGEMENT PORTIONS COOPERATES WITH SAID TEETH TO PREVENT RELATIVE ROTATION IN THE OPPOSITE DIRECTION BETWEEN THE INNER AND OUTER MEMBERS, AND REVERSING MEANS TO PLACE AND YIELDINGLY MAINTAIN SAID PAWL AT SAID TWO OPERATING POSITIONS SELECTIVELY, SAID REVERSING MEANS INCLUDING A CAM SURFACE ON ONE END OF THE PAWL AND A SPRING-PRESSED FOLLOWER EXERTING PRESSURE ON SAID CAM SURFACE IN A DIRECTION PARALLEL TO THE AXIS OF ROTATION OF THE PAWL.