Abstract: A guard for protecting the hand or hands of an operator to limit the extension thereof and prevent entry into a hazardous or danger zone of a machine, such as a stamping press or the like, includes a shield in the form of a transparent or partially transparent rigid plate member which is fixed in spaced relation to the throat or nip point or hazardous region of the press. The plate has an aperture through which the operator may extend a portion of a protective glove in loading and unloading articles into and out of the hazardous region. The glove has a rigid, radially extending cuff or collar surrounding the glove at the wrist portion and having an outer dimension which exceeds that of the aperture formed in the plate. The position of the collar on the glove is related to the position of the plate and the maximum extension of the fingers such that when the glove is inserted through the opening, no part of the hand may enter a predetermined danger zone.

Abstract: A system for removing oil, water and other adulterants from machine shop scrap cuttings. Scrap is inserted in the upper end of an inclined tumbler barrel and passed through a counterflowing stream of hot gases from a burner located at the lower end. Oxygen is inserted into the tumbler barrel at an intermediate position. The barrel is lined with refractory inserts each having contiguous connecting passages of different diameters. The scrap is raised to a temperature near its melting point and compacted into briquettes while remaining hot. Excess fuel gas flow and combustion prevent the aspiration of air into the barrel and thus prevent oxidation of the metal part of the scrap. As an alternative, the scrap can be melted as it flows from the tumbler barrel directly into a melting pot.