conehead

a. size, like the small pill-boxes at a druggist's. This structure is occasionally found in coal, limestone, . cone-joint, s . A joint formed by a double cone of iron inserted into the ends of the pipes to be joined, and tightened by screw-bolts. cone-plate, s. Mech.: A strong plate of cast iron fixed vertically to the bed of a lathe, with a conical hole in it, to form a support for the end of a shaft which it is required to bore. (Weale.) cone-pulley, 8. 1. An arrangement for varying the speed of the bobbin in spinning-machines, giving them a gradually decreasing velocity as the roving is wound thereon, so as to keep an equal strain on the roving. The lower pulley is driven with a uniform speed, and communicates motion to the other by a band which is slipped toward the larger end of the upper roller as the roving gradually fills the bobbin. 2. Mach .: A pulley with several faces of varying diameter, so as to obtain varying speeds of the mandrel; a speed -pulley.