Clamp
A device for drawing together and securely holding two or more objects, such as two parts of a flask, core-box, etc. Besides the ordinary ones of cast and wrought iron which may be seen at all foundries, there are a considerable number of patented devices, some of which have very ingenious modes of adjustment. The Diamond Adjustable, with automatic lock, Hawley's Sliding Clamp with excentric head, are among the many truly good inventions which are supplied by the foundry agents. Called a "cramp" sometimes. Clay is a term of uncertain application to all kinds of earth or soil which, when moistened, become plastic and tenacious. Common clays are not easily distinguishable as mineral species; but it is apparent that nearly all have their origin in the decomposition of other minerals, chiefly consisting of alumina in combination with silica and water. See FIRE-CLAY.