The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2015
Filed:
Jun. 02, 2010
Gang Xing, Shanghai, CN;
Gang Xing, Shanghai, CN;
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
A switch detection system () includes a first switch () having a pole node (), a normally closed contact (), and a normally open contact (), the pole node () of the first switch () connected to a voltage source node (), a second switch () having a pole node (), a normally closed contact () and a normally open contact (), the pole node () of the second switch () connected to the normally closed contact () of the first switch (), a voltage detector () connected to the normally closed contact () of the second switch (), a first resistor () connected to the normally open contact () of the first switch (), and a second resistor () connected to the normally open contact () of the first switch () and the normally open contact () of the second switch ().