Patent ID: 6877587

Claim:
Equipment for determining a position of an elevator car movable along a guide flange of at least one guide rail in an elevator installation, the elevator installation including a stationary code carrier extending along a length of the at least one guide rail guide flange in a travel direction of the elevator car, and a code reading sensor system for contactless detection of the length coding of the code carrier, the sensor system comprising: a mount adapted to be attached to the elevator car, said mount being fixed in the travel direction and movable in a direction normal to the travel direction; a code reading sensor system attached to said mount; at least one guide roller rotatably attached to said mount and being adapted to roll on a guide flange of the at least one guide rail to maintain said code reading sensor system at a predetermined spacing from the code carrier; and another guide roller rotatably attached to said mount and arranged behind said at least one guide roller in the travel direction, said another guide roller being adapted to roll on the guide flange of the at least one guide rail to maintain said code reading sensor system at the predetermined spacing from the code carrier.