Static Magnetic Storage and Delay Line

Magnetic cores with a rectangular hysteresis loop are used in a storage system which requires no mechanical motion and is permanent. The binary digit ``1'' is stored as a positive residual flux, and the binary digit ``0'' as a residual flux in the opposite direction. When a negative probing field is applied to the core, a large voltage is induced in another winding if the digit stored has been a ``1,'' and very small voltage if it has been a ``0.'' The induced voltage in the former case is large enough to magnetize another core of identical construction. Binary digits can thus be transferred from one core into another. Many cores are arranged in tandem to form an information delay line. Binary digits can be advanced along the line step by step. The present upper limit of the speed of propagation is about 35,000 digits per second, and there is no lower limit.