Piezoelectric element for an automatic frequency control circuit, oscillating mechanical system and device comprising the same
US10969745B2 · kind B2 · utility
4Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B17/227
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric element for an automatic frequency control circuit. The element includes a balance spring formed of a piezoelectric crystal strip, a first electrode connected to the automatic control circuit, and disposed on at least a first side of the strip, and a second electrode connected to the automatic control circuit and disposed on at least a second side of the strip. The first and second electrodes are placed on one portion or over the entire length of the balance spring in a predetermined angular distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.