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本发明提出的背景环状磁心在计算机工业中用作随机存储元件已有很长的历史。在磁心板中,磁心排列成矩阵,有许多细导线(例如直径为0.00249英寸的AWG 42型导线)穿过磁心的孔中。典型的磁心矩阵有128行和128列,或者说有16384颗磁心,每颗磁心的外径为0.023英寸,内径为0.015英寸。过去用手工穿磁心矩阵时,穿磁心用的导线都做得比较短,每根导线的头上要焊上一根引针。这样,典型的磁心矩阵就要求有256根导线,每根导线头上都要有一根引针。以前的各种自动或半自动的磁心穿线机械都是将待穿线的磁心矩阵放在固定的位置上,
The background toroidal cores proposed by the present invention have long been used as random access memory elements in the computer industry. In a core plate, the cores are arranged in a matrix with a number of fine wires, such as AWG 42 wires of 0.00249 inch diameter, passing through the holes of the core. A typical core matrix has 128 rows and 128 columns, or 16384 cores, each having an outer diameter of .023 inches and an inner diameter of .015 inches. In the past to wear the core matrix by hand, the core wire used to do a relatively short, the head of each wire to be welded on a needle. Thus, a typical core matrix requires 256 conductors, each conductor must have a needle. Prior to a variety of automatic or semi-automatic core threading machinery are to be threaded core matrix on a fixed position,