Structure of a projection for an electromagnetic pick-up in a rotor
US6111404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2055/366
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detected projection is integrally provided on one side of a rotor produced by pressing a plate material. A portion of a rotor is allowed to bulge from one side of the rotor by pressing. At least one end of the projection in a circumferential direction of the rotor is comprised of a shear end face steeply rising from the side of the rotor by a shearing effect during pressing. The shear end face is formed as a sensing end face for an electromagnetic pick-up. The detected projection generates a rotation detecting pulse in an electromagnetic pick-up disposed in proximity to the rotor. The accuracy in size of the projection is enhanced and moreover, when the projection is detected by the electromagnetic pick-up, a pulse wave form is generated clearly and sharply, thereby enhancing the sensing accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.