Knock down building material elevator

Claim 1

AN ELEVATOR APPARATUS COMPRISING: (A) A SECTIONAL COLUMN OF COMPARATIVELY SMALL RECTANGULAR CROSS-SECTION AND HAVING A REAR SURFACE, A FRONT SURFACE AND SIDE SURFACES, SAID COLUMN BEING COMPOSED OF A PLURALITY OF VERTICALLY DISPOSED ENDTELESCOPING COLUMN SECTIONS, SAID SECTIONS EACH HAVING EARS SECURED THERETO AND PROJECTING REARWARDLY FROM SAID REAR SURFACE, SAID EARS TERMINATING IN CLAMPING MEMBERS FOR SECURING SAID SECTIONS IN VERTICALLY ALIGNED END-ENGAGING RELATIONSHIP TO ADJACENT VERTICAL SUPPORTING STRUCTURE, (B) A CARRIAGE HAVING REAR UPPER ROLLERS LATERALLY SPACED APART FOR ROLLING ENGAGEMENT WITH SAID REAR SURFACE WITHOUT INTERFERENCE WITH SAID EARS, SAID CARRIAGE HAVING A FRONT LOWER ROLLER FOR ENGAGING SAID FRONT SURFACE AND SPACED BELOW SAID REAR ROLLER, SAID CARRIAGE HAVING LATERAL STABILIZING ROLLERS FOR ENGAGING SAID SIDE SURFACES TO PREVENT LATERAL TIPPING WITH RESPECT TO SAID COLUMN, (C) A PLATFORM SUPPORTING STRUCTURE FIXED TO SAID CARRIAGE BETWEEN SAID UPPER AND LOWER ROLLERS, AND PROJECTING FORWARDLY FROM SAID FRONT SURFACE, A PLATFORM SECURED TO SAID PLATFORM STRUCTURE AND HAVING A HORIZONTAL MATERIALS SUPPORTING SURFACE, (D) SAID CARRIAGE HAVING A PAIR OF LATERALLY SPACED APART FORWARDLY DIRECTED EARS AT THE UPPER PORTION THEREOF, A CYLINDRICAL MEMBER ROTATABLY MOUNTED BETWEEN SAID EARS ON A HORIZONTAL ECCENTRIC AXIS, AND HAVING A BRAKING CYLINDRICAL SURFACE, SAID AXIS BEING POSITIONED WHEREBY SAID BRAKING SURFACE ENGAGES SAID FORWARD SURFACE ONLY UPON ROTATION OF SAID CYLINDRICAL MEMBER OUT OF A NORMAL POSITION, A LUG SECURED TO AND EXTENDING RADIALLY FROM SAID CYINDRICAL MEMBER, SAID LUG EXTENDING UPRIGHT WHEN SAID CYINDRICAL MEMBER IS IN SAID NORMAL POSITION, SPRING MEMBERS ENGAGING SAID EARS AND SAID CYLINDRICAL MEMBER FOR RESILIENTLY URGING SAID CYLINDRICAL MEMBER OUT OF SAID NORMAL POSITION, (E) A WINCH ASSEMBLY INCLUDING A COLUMN SECTION HAVING A DEPENDING PORTION TELESCOPICALLY RECEIVABLE IN THE UPPER END OF THE NEXT PRECEDING COLUMN SECTION, SAID WINCH ASSEMBLY INCLUDING AN EAR SECURED THERETO AND EXTENDING REARWARDLY THEREOF AND TERMINATING IN A CLAMPING MEMBER FOR SECURING TO SAID ADJACENT VERTIAL SUPPORTING STRUCTURE, SAID WINCH ASSEMBLY INCLUDING A SELF BRAKING GEAR REDUCER HAVING AN INPUT AND AN OUTPUT SHAFT, A CABLE REEL ON SAID OUTPUT SHAFT, A SUPPORT MEMBER AT THE UPER END OF SAID WINCH ASSEMBLY A REVERSIBLE MOTOR SECURED TO SAID SUPPORT MEMBER AND OPERABLY CONNECTED TO SAID INPUT SHAFT FOR ROTATING SAID REEL, (F) A CABLE WOUND ON SAID REEL AND HAVING A FREE END TERMINATING IN A CONNECTOR SECURED TO SAID LUG, THE WEIGHT OF SAID CARRIAGE AND PLATFORM NORMALLY EXERTING SUFFICIENT TENSION ON SAID CABLE FOR MAINTAINING SAID CYLINDRICAL MEMBER IN SAID NORMAL POSITION WHEREBY SAID CYLINDRICAL MEMBER IS DISENGAGED FROM SAID FRONT SU RFACE, AND MEANS FOR SELECTIVELY APPLYING ELECTRICAL POWER TO SAID MOTOR FOR RAISING AND LOWERING SAID PLATFORM.