1,073,431. Measuring displacements electrically. JAMES ARCHDALE & CO. Ltd. Feb. 5, 1964 [March 13, 1963], No.9895/63. Heading G1N. Apparatus for measuring the position of e. g. a machine tool relative to the machine base comprises a ferromagnetic armature 20 (Fig. 2) attached to the moving member 19, and a coil assembly 6 embedded in the base 11, the assembly comprising an E-shaped permalloy core 9, with a winding 7, 8 on each leg. The coils 7, 8 are connected in an A. C. bridge circuit which is normally balanced, but is unbalanced when armature 20 is located near the longer leg 9b of the core 9. In another embodiment (Fig. 5), the core comprises a ferrite rod 21 with a central disc 22 and cylindrical sleeve 23. The armature approaches one end of the core, thereby affecting coil 7 only. A number of detecting devices may be used, the outputs being fed through logic circuits to control different parts of the machine tool.
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机译：1,073,431。电气测量位移。 JAMES ARCHDALE＆CO。Ltd.，1964年2月5日[1963年3月13日]，编号9895/63。标题G1N。测量e位置的设备。 G。相对于机器基座的机床包括：铁磁衔铁20（图2），该铁磁衔铁20附接至移动构件19;以及线圈组件6，其嵌入在基座11中，该组件包括具有绕组的E形坡莫合金芯9。每条腿7、8。线圈7、8以交流电桥电路连接，该交流电桥电路通常是平衡的，但是当电枢20位于铁心9的较长支脚9b附近时是不平衡的。在另一个实施例中（图5），铁心包括铁氧体棒。在图21所示的实施例中，具有中心盘22和圆柱形套筒23。电枢接近铁心的一端，从而仅影响线圈7。可以使用许多检测装置，输出通过逻辑电路馈送以控制机床的不同部分。
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