Patent ID: 6966428

Claim:
Apparatus for transferring an article from a first position to a second position without varying an angular orientation of the article, said apparatus comprising, in combination: a fixed shaft; a housing journalled on said fixed shaft to be oscillatable with respect to said fixed shaft, a first pulley within said housing, said first pulley being coaxial with said fixed shaft and being oscillatable with said housing with respect to said fixed shaft, said first pulley having a plurality of untoothed grooves in an outer periphery and concentric with an axis of oscillation of said housing; a second pulley within said housing and oscillatable with said housing, said second pulley being spaced from said first pulley and being rotatable with respect to said housing about a central axis of said second pulley, said central axis of said second pulley being parallel to the axis of oscillation of said first pulley; a first cable trained around a first portion of said first pulley and a first portion of said second pulley; a second cable trained around a second portion of said first pulley and a second portion of said second pulley; said first portion of said first pulley and said second portion of said first pulley being spaced from one another about the axis of oscillation of said first pulley; said first portion of said second pulley and said second portion of said second pulley being spaced from one another about said central axis of said second pulley; and, one of said first pulley and said second pulley being split with the first portion of said one of said first pulley and said second pulley and the second portion of said one of said first pulley and said second pulley being circumferentially adjustable relative to one another to permit independent adjustment of tension levels in said first cable and said second cable.