Publisher's Synopsis
Excerpt from Electric Locking
Classification OF electric locking. The various schemes for the supplementary protection of an interlocking plant (partly exclusive of the mechanical locking in the interlocking machine and often in conjunction with it) can be classed under one gen eral head of electric locking.
The Railway Signal Association manual defines electric lock ing as being The combination of one or more electric locks and controlling circuits by means of which levers of an interlocking machine, or switches or other devices operated in connection with signaling and interlocking, are secured against operation under certain conditions.
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