Electromagnetic safety device of a screw/nut type
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United States of America Patent
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Oct 21, 1986
Issued Date -
N/A
app pub date -
Oct 13, 1983
filing date -
Jan 24, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A safety device to be applied to the vertical displacement of, for example, the control rods of a nuclear reactor, comprises the combination of a stator placed on the outside upper part of an impervious, nonmagnetic cylinder within the inside of which a rotor is mounted about its shaft, free in axial translation, with the shaft rotatable with the rotor but fixed in translation, and with the rotation of the shaft transferred to a hollow threaded rod which will transfer rotation to a nut slidable vertically inside the cylinder, supporting the control rods therebelow; the rotor also controlling the opening and closing of a jaw for holding and releasing the hollow threaded rod.
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