Patent ID: 7841246

Claim:
A measuring device for measuring the length of a cable under tension moved through said measuring device; said measuring device comprising: a frame; a measuring pulley rotatably mounted on said frame so as to rotate in a measuring pulley plane about an axis; said measuring pulley having: a circumferential surface including: a cable receiving portion for receiving said cable; a rotation sensor connected to said frame for sensing the rotation of said measuring pulley and for producing a signal indicative of the rotation thereof; and an anti-slip device for preventing said midsection of said cable from slipping on said cable receiving portion of said measuring pulley comprising: a loading roller comprising: a loading roller shaft mounted on said frame so as to be displaceable relative to said measuring pulley; and a loading roller disk mounted on said loading roller shaft so as to rotate in the measuring pulley plane; and loading assembly including: a tension member flexible in the measuring pulley plane including: a first end connected to said frame; a second end connected to said frame; and a midsection connected to said loading roller shaft for applying loading to said loading roller as a function of the tension of said tension member for pressing said loading roller disk against the cable on said cable receiving portion of said circumferential surface of said measuring pulley such that movement of said cable rotates said measuring pulley.