Quote:
Originally Posted by EricH
Yes. If the electromagnet is causing the motion, then it is considered a solenoid actuator and illegal (<R53>). If anything else is causing the motion, and the electromagnet is acting as a latch, then the electromagnet is considered an electromagnet and legal.
As far as buying/making your own, you'd probably want to ask that in Q&A. It would probably wind up being answered as "both", but you never quite know.
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So when you say "causing the motion", this would mean initiating a force on an element applied so as to move it over a distance -- i.e. doing work on an element. But a static steel plate stuck to an electromagnet is not in motion, despite the force being applied to hold it in its static position, so, de-energizing the electromagnet merely allows the pin release spring to now do the work of disengaging the pin, and allowing the release of the swing arm.
This seems fairly clear. Just no pushing or pulling MOVEMENT of elements by forces developed within an electromagnetic device are allowed. Only for HOLDING elements in a static position can an electromagnetic device's force be used.
-Dick Ledford