×

System for position loss recovery for an elevator car

  • US 5,631,452 A
  • Filed: 08/18/1994
  • Issued: 05/20/1997
  • Est. Priority Date: 08/18/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for position loss recovery for an elevator car;

  • said system comprising;

    signal generating means for generating signals indicative of the distance travelled by an elevator car within a hoistway;

    floor location means, disposed within said hoistway, for indicating each floor location;

    floor identifying means, disposed within said hoistway, for uniquely identifying each floor location, said floor identifying means including identification means having a length that is uniquely associated with a respective floor;

    sensing means, affixed to said elevator car, for separately sensing said floor location means and said floor identifying means; and

    processing means for processing signals from said signal generating means and signals from said sensing means to determine an exact floor location of said elevator car.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×