Shaft access enabling device of an elevator system
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United States of America Patent
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Mar 1, 2016
Grant Date -
Dec 6, 2012
app pub date -
Dec 1, 2010
filing date -
Dec 21, 2009
priority date (Note) -
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Abstract
A shaft access enabling device of an elevator system has a shaft access control unit and at least one access monitoring unit, wherein the shaft access control unit controls an operating state of the at least one access monitoring unit and the access monitoring unit monitors at least one shaft access. The shaft access control unit has at least two different operating modes for controlling the operating state of the at least one access monitoring unit and inspects access authorization before changing between the at least two operating modes thereof.
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