Slack adjuster

Claim 1

AN AUTOMATIC SLACK ADJUSTER COMPRISING, SUPPORT MEANS, MEANS CARRIED BY SAID SUPPORT MEANS FOR EFFECTING AUTOMATIC ADJUSTMENT OF SLACK IN THE SLACK DECREASING DIRECTION, SAID AUTOMATIC SLACK ADJUSTING MEANS COMPRISING A FIRST AND SECOND MEANS MOVABLE TELESCOPICALLY RELATIVE ONE TO THE OTHER TO EFFECT SLACK ADJUSTMENT, SAID FIRST MEANS HAVING A THREADED PORTION THREADEDLY ENGAGED BY FIRST AND SECOND NUTS, DISPLACEMENT OF WHICH NUTS ON THE SCREW-THREADED PORTION EFFECTS RELATIVE TELESCOPING OF SAID FIRST AND SECOND MEANS, A SENSING MEMBER DISPOSED ON SAID SECOND MEANS FOR AXIAL MOVEMENT RELATIVE THERETO AND BIASED TO A PREDETERMINED POSITION RELATIVE TO SAID SECOND MEANS IN THE BRAKE APPLYING DIRECTION WITH RESPECT TO SAID SECOND MEMBER AND FOR MOVEMENT WITH THE SECOND MEMBER INTO ENGAGEMENT WITH THE STOP ON SAID SUPPORT MEANS, MEANS PREVENTING RELATIVE ROTATION BETWEEN AND SENSING MEMBER AND SAID SECOND MEANS DURING AXIAL MOVEMENT OF SAID SENSING MEMBER RELATIVE TO SAID SECOND MEANS, A FIRST SPRING RESILIENTLY HOLDING THE FIRST NUT IN A FIRST CLUTCHING ENGAGEMENT RELATIVE TO THE SENSING MEMBER AND A SECOND SPRING EXTENDING BETWEEN THE SENSING MEMBER AND THE SECOND NUT AND RESILIENTLY HOLDING THE SECOND NUT IN THE SECOND CLUTCHING ENGAGEMENT WITH THE SECOND MEMBER, THE ARRANGEMENT BEING SUCH THAT A FORCE APPLIED TO THE FIRST MEMBER IN THE BRAKE-APPPLYING DIRECTION TENDS TO BREAK SAID FIRST AND SECOND CLUTCH ENGAGEMENTS AGAINST THE RESILIENT FORCE EXERTED THEREON BY SAID FIRST MEMBER IN THE SPRINGS AND FORCE APPLIED TO THE FIRST MEMBER IN THE OPPOSITE DIRECTION TENDS TO REINFORCE EACH OF SAID FIRST AND SECOND CLUTCHING ENGAGEMENTS.