Automatic adjustor

Claim 1

IN A FRICTION DEVICE HAVING A PAIR OF RELATIVELY DISPLACEABLE FRICTION MEMBERS ADAPTED FOR ENERGIZATION INTO FRICTIONAL ENGAGEMENT, EXTENDABLE ADJUSTMENT MEANS ENGAGED WITH ONE OF SAID FRICTION MEMBERS FOR CONCERT DISPLACEMENT THEREWITH UPON ENERGIZATION OF SAID FRICTION MEMBERS INTO FRICTIONAL ENGAGEMENT AND NORMALLY DEFINING THE RETRACTED POSITION OF SAID ONE FRICTION MEMBER INCLUDING WHEEL MEANS ROTATABLE TO EXTEND SAID ADJUSTMENT MEANSA AND ADJUST THE RETRACTED POSITION OF SAID ONE FRICTION MEMBER, ADJUSTOR MEANS PIVOTED ON A FIXED PORTION OF SAID FRICTION DEVICE, A FOLLOWER ARM ON SAID ADJUSTOR MEANS URGED INTO ENGAGEMENT WITH SAID ADJUSTMENT MEANS TO PERMIT PIVOTAL MOVEMENT OF SAID ADJUSTOR MEANS IN ONE DIRECTION IN RESPONSE TO THE DISPLACEMENT MOVEMENT OF SAID ADJUSTMENT MEANS AND TO PIVOT SAID ADJUSTOR MEANS IN AN OPPOSITE DIRECTION IN RESPONSE TO THE RETURN MOVEMENT OF SAID ADJUSTMENT MEANS TOWARD THE RETRACTED POSITION UPON DE-ENERGIZATION OF SAID FRICTION MEMBERS, AND A DRIVING ARM ON SAID ADJUSTOR MEANS ADAPTED FOR DRIVING ENGAGEMENT WITH SAID WHEEL MEANS, SAID DRIVING ARM BEING PIVOTED WITH SAID ADJUSTOR MEANS IN RESPONSE TO THE RETURN MOVEMENT OF SAID ADJUSTMENT MEANS INTO DRIVING ENGAGEMENT WITH SAID WHEEL MEANS TO EFFECT ROTATION THEREOF AND EXTEND SAID ADJUSTMENT MEANS TO ADJUST THE RETRACTED POSITION OF SAID ONE FRICTION MEMBER.