NASA NTRS · 19660000167
Safety switch permits emergency bridge crane shutdown
Abstract
Safety switch on a crane control pendant must be held closed to operate the crane. This provides for immediate power cutoff to the crane in an emergency or a pendant circuit failure.
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Long, E. J. R.. 1966-04-01. Safety switch permits emergency bridge crane shutdown. https://ntrs.nasa.gov/citations/19660000167
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