US Patent No. 361,129, granted April 12, 1887 to Léon Camel of Lyons, France, for a mechanical device that joins the end of a new cocoon fiber to the thread during silk reeling (cocoon spinning). It replaces the skilled hand-work of the spinner with a rapidly rotating notched disk on a tube around a fixed central tube with an agate bushing. The text covers the problem, the operation, the characteristic features, and six claims, with drawings of the device in sectional views and plan.