| 摘要 |
941427 Super-conductors INTERNATIONAL BUSINESS MACHINES CORPORATION 15 Feb 1960 [20 May 1959] 5258/60 Headings H1A A5 and A4D A super-conductor circuit component consists of an alloy of indium and mercury. The Specification explains that super-conductive alloys often show transitions from the super-conductive to the resistive state which are not sharp due to inhomogeneity of the material, each microscopic portion having its individual critical temperature. Fig. 2 however, shows the critical temperature of an indium mercury alloy plotted against atomic percentage of mercury and indicates that in the range 0À05-2% mercury the critical temperature is both a minimum and is constant. Fig. 3 shows the variation in the width of the transition curves in K. plotted against atomic percentage of mercury and shows that this minimum width corresponds to minimum slope in curve 2. Such an alloy may be manufactured by reducing the super-conductive materials to liquid form and mixing them in a vacuum to form a homogeneous solution. The alloy is then subjected to violent agitation for 15 minutes at 175‹C. The liquid solution is then quenched in an oil bath and extruded through a die to the desired shape. The alloy was then subjected to a temperature of nine-tenths of its melting temperature for a few hundred hours. Fig. 5 shows a bi-stable circuit comprising four super-conductive circuits K30-K33 each comprising a super-conductive gate and a superconductive control winding. Current flows from source 34 through one of a pair of parallel paths to terminal 37. One path includes gate 35 of K30 and control conductor 36 of K32, the other gate 38 of K31 and control conductor 39 of K33. One path or the other is rendered resistive by current flow through control conductor 40 or 41 or K30 and K31 and current flows to terminal 44 or 45 according as current from source 34 is in one path or the other. Specification 862, 178 is referred to.
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