Abstract: Apparatus is disclosed for controlling the tension on a web which is fed to a blanking press so as to maintain proper alignment of printing on the resulting blanks. This is accomplished by means of an adjustable air brake attached to a shaft which supports a roll from which the web is withdrawn. A sensing means is employed to detect register marks on the web and to control the pneumatic pressure supplied to the air brake.

Abstract: An explosively operated device by which a strong magnetic field pulse and an electric current pulse of microseconds duration is produced. A cylindrical magnet is used to initiate the field, and its energy source is an explosive filled metal tube. Within the converter itself, the lines of magnetic flux are essentially axial. When an explosive charge in the central tube is detonated, the end of the tube flares radially, and the tube begins to expand along its length. As it does so, the tube compresses the magnetic field against the inner surface of a magnet. Simultaneously, a helical coil inside the converter experiences a rapid increase in flux density, thus satisfying Faraday's law. This interaction causes a pulse of electric current to be fed into the turns of the magnetocumulative generator as its initial magnetic field is maximized. As the central tube expands against the inside of the coil, it shorts out the turns one-by-one as the detonation wave travels axially along the converter.