| US 7,540,357 B2 | ||
| Position reference system for elevators | ||
| Alan Finn, Hebron, Conn. (US); Jae-Hyuk Oh, Tolland, Conn. (US); Pei-Yuan Peng, Ellington, Conn. (US); and Chris Pietrzykowski, Unionville, Conn. (US) | ||
| Assigned to Otis Elevator Company, Farmington, Conn. (US) | ||
| Appl. No. 10/557,232 PCT Filed May 15, 2003, PCT No. PCT/US03/15244 § 371(c)(1), (2), (4) Date Nov. 15, 2005, PCT Pub. No. WO2004/106209, PCT Pub. Date Dec. 09, 2004. |
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| Prior Publication US 2006/0243537 A1, Nov. 02, 2006 | ||
| Int. Cl. B66B 1/34 (2006.01) | ||
| U.S. Cl. 187—394 | 5 Claims |
| 1. A position reference system for use in a conveyance system to determine the position of an elevator car with respect to
a fixed reference location, said system comprising:
a code on a primary motion coupling of said elevator car
a reader for reading said code; and
said primary motion coupling comprising a belt and said code comprises holes cut through said belt.
|