Electromagnetic circuit and servo mechanism for articulated cameras
US7071591B2 · kind B2 · utility
3Cited by
74References
63Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2003 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Dec 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K25/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic circuit that may be advantageously employed in an articulated camera, such as a CCTV camera, as a part of a servo mechanism to directly drive the camera and optical lens assembly, for example, in the pan and/or tilt axes. In one embodiment, the coil assembly of the servo mechanism may comprise four separate coils that rotate about the center of the ring shape of a single one-piece ring-shaped permanent magnet that has been pre-magnetized in two pair of opposing polarities. The magnet assembly that includes the magnet ring, may be bonded to a circular plate made of ferrous metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.