disk telegraph (disktel"egraf)

A telegraph in which the letters of the alphabet or figures are placed on a circular plate in such a manner that they can be brought in succe ion to an opening, or indicated in succe ion in some other way, as by a pointer. disk-valve (disk'valv), n. A valve consisting of a perforated disk with a partial and reciprocating, or a complete, rotation upon a circular seat, the opem openings in which form ports for steam and other IMG:content-2815.png:[blocks in formation]