US 12,297,079 B2
Roller speed sensor with magnets and sensors
Yu Pu, Farmington, CT (US); and Justin Billard, Amston, CT (US)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Oct. 1, 2020, as Appl. No. 17/060,740.
Prior Publication US 2022/0106161 A1, Apr. 7, 2022
Int. Cl. B66B 5/00 (2006.01); B66B 1/34 (2006.01); B66B 7/04 (2006.01); G01P 3/44 (2006.01)
CPC B66B 5/0018 (2013.01) [B66B 1/3492 (2013.01); B66B 7/046 (2013.01); G01P 3/44 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A roller speed sensor for detecting a speed of an elevator car of an elevator system, the roller speed sensor comprising:
a first roller configured to rotate along a guide rail of the elevator system when the elevator car moves up or down an elevator shaft, the first roller comprising:
one or more magnets; and
a first sensor pair located proximate the first roller, the first sensor pair being configured to detect a rotational speed of the one or more magnets;
a base plate comprising a first side, a second side opposite the first side, a first end and a second end opposite the first end;
a first housing located on the first side proximate the first end; and
a second housing located on the first side proximate the second end, the first housing and the second housing being separated by a gap,
wherein the guide rail is configured to fit within the gap;
a roller carriage, wherein the first roller is attached to the base plate or the first housing via the roller carriage;
a biasing mechanism, wherein the roller carriage is attached to the base plate or the first housing via the biasing mechanism.