Centrifugal actuator for controlling a switch unit particularly a start winding switch unit for an electric motor
US6201325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2000 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Mar 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/23
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A centrifugal actuator for operating a motor start winding switch includes a base fixed to the shaft as a bearing shoulder and a hub slidably mounted to the base by a groove mating projection and grooves. The hub has a flange which actuates the switch. The hub and base include stops which limit the hub travel. Diametrically opposite hinge units on the base receive offset pivot arms including a pivot rod held in the unit by weight connected coil springs. The weights are L-shaped having heavy plate and offset levers having a hinge or pivot plate therebetween. The pivot plate is offset from the plane of the levers and includes an opening forming the pivot rod having a coined pivot edge. The base hinge units have hook members within which the rod pivots. The outer tab of the hook enters the pivot plate opening in the run position to lock the weight in place. The base is secured to the shaft with an end surface to function as a shoulder for a bearing. The base is mounted with loaded portions to prevent base creeping or deflection. The base and hub are weight balanced for vertical motors. The pivot rod is located to place the pivot point of the weight at substantially the center of the m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.