Mechanical back brush and height scale

Claim 1

A BACK-SCRUBBING DEVICE COMPRISING AN ELONGATED UPSTANDING CYLINDRICAL GUIDE TUBE HAVING A LONGITUDINALLY EXTENDING SLIT IN ITS WALL, A STORAGE UNIT COMPRISING A CYLINDRICAL HOUSING CARRIED ON THE UPPER END OF SAID TUBE, WITH ITS AXIS TRANSVERSE TO THE AXIS OF SAID TUBE, A FIXED SHAFT IN SAID HOUSING, CONCENTRIC THEREWITH, A REEL MOUNTED FOR ROTATION ON SAID SHAFT, A COIL SPRING WITH ONE END ANCHORED ON SAID SHAFT AND THE OTHER END ATTACHED TO SAID REEL, A RIDER OF GENERALLY CYLINDRICAL FORM, SLIDABLY MOUNTED IN SAID TUBE, AND HAVING A NECK PORTION PROJECTING THROUGH AND SLIDABLE ALONG SAID SLIT, AND A BLOCK EXTERIORLY OF AND ADJACENT TO THE SLIT OF SAID TUBE AND SECURED TO SAID NECK PORTION, SPRING CLAMP MEANS ON SAID BLOCK FOR HOLDING A BRUSH, SAID TUBE HAVING, AT ITS LOWER END, A RECTANGULARLY DISPOSED PORTION, AND SAID PORTION HAVING A TERMINAL END SECTION DISPOSED TRANSVERSELY TO THE PLANE OF THE AXES OF SAID TUBE AND SAID PORTION, SAID RIDER HAVING A SERIES OF BORES ARRANGED PARALLEL TO ITS AXIS, A CORD ATTACHED TO SAID REEL, THREADED ALTERNATELY THROUGH THE BORES IN SAID RIDER AND PASSING THROUGH THE TUBE AND SAID PORTION, AND EXTENDING OUTWARDLY OF SAID SECTION, A TUBULAR HANDLE RECEIVED ON SAID CORD OUTWARD-