06732839 is referenced by 19 patents and cites 5 patents.

A monitoring device for an elevator includes a plurality of switching devices connected in a series safety chain. Each switching device has an active unit generating a pattern and a passive unit that responds to the pattern within a defined spacing between the units.

Title
Contactless switching device for an elevator safety chain
Application Number
10/353648
Publication Number
6732839 (B2)
Application Date
January 29, 2003
Publication Date
May 11, 2004
Inventor
Kilian Schuster
Ballwil
US
Agent
MacMillan Sobanski & Todd
US
Assignee
Inventio
US
IPC
B66B 1/34
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