Electric acutating device
US4084502A · kind A · utility
3Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | May 3, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04D7/1221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electric actuating device for producing limited angular displacements comprising an ironless cylindrical coil mounted for rotation in an air gap of a magnetic circuit, the magnetic circuit being formed by a permanent magnet placed inside the coil and an outer part of magnetically permeable material surrounding the coil. The coil is connected through spiral springs to a source of electric control pulses. The spiral springs provide a return force for bringing the coil back to a rest position in the absence of a control pulse. Means are provided for limiting the angle of rotation of the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.