Publisher's Synopsis
Excerpt from Results of a Survey of Elevator Interlocks and an Analysis of Elevator Accident Statistics
There is considerable need for some sound engineering work in connection 'with the proper design Of interlocks. Many Of the devices on the market were designed without due regard for the stresses set up by door impact, lack Of alignment, and abuse of equipment at the hands Of careless operators. Such devices are generally Sold at a low price, the manufacturer depending upon this low price to Obtain business: In many cases such devices fail after a short period Of service and are, in the end, more expensive than a well-designed and carefully installed out fit, the initial cost Of which would have been greater.
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