| 摘要 |
An inductive coupling device is provided wherein the transmission of energy through the device is controlled by the application of a steady magnetic field within the magnetically permeable core of the device, transmission being inhibited at high magnetic field intensity and restored when the magnetic field intensity is reduced to a low value. The device is especially advantageous for the safe coupling of ignition elements, such as blasting detonators, to an a.c. firing energy source.
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