Cable lock shoe

Claim 1

In an electric hoist for vertical movement on a stationary cable, a block on said hoist and movable therewith, a vertical recess in said block and having said cable extending therethrough adjacent one side thereof, said one side of said recess extending parallel to said cable and having a cable receiving groove extending therealong, the side of said recess opposite said groove sloping inwardly upwardly toward said cable, a generally circular recess formed in said block adjacent to and communicating with said vertical recess on said one side of said vertical recess, a cam mounted for rotation in said circular recess and adapted to engage said cable upon rotation of said cam, a cable lock shoe mounted for vertical sliding movement in said vertical recess, a downwardly and outwardly sloping wall on said shoe arranged in confronting relation to said inwardly sloping side of said vertical recess to move said shoe laterally in a cable clamping direction as said shoe moves upwardly in said recess, a groove formed in the side of said shoe toward said cable for engaging said cable, said side of said shoe toward said cable extending vertically from its upper end to a point intermediate its upper and lower end and then extending parallel to said downwardly and outwardly sloping wall for the rest of its length whereby the shoe does not bind against said cam when moving upwardly in a cable clamping direction.