Electrical system for monitoring warp yarns in weaving machines

Claim 1

In a system for electrically monitoring warp yarns in a weaving machine, wherein electrically conducting monitoring rail means include at least one continuous first rail member and at least one sectioned second rail member, insulating means electrically insulating said first and second rail members from each other, said second sectioned rail member including a plurality of rail sections also electrically insulated from each other but arranged in a row extending substantially in parallel to said continuous first rail member, and drop wire means operatively arranged for electrically connecting said continuous first rail member to any one of said rail sections of said second rail member in response to any warp yarn rupture, the improvement comprising an electrical monitoring circuit including individual indicator means electrically connected in series with adjacent rail sections (11, 12, . . . ) for forming an electrical series circuit of rail sections alternating with said individual indicator means, a source of electrical power, conductor means electrically connecting said first continuous rail member to one terminal of said electrical power source, and further conductor means electrically connecting said series circuit to another terminal of said electrical power source, whereby at least one of said individual indicator means is energized by said electrical power source in said electrical monitoring circuit when said drop wire means drop to thereby pinpoint a location where a warp yarn rupture occurred.