Piezoelectric resonator for timepieces and method for making same
US4065684A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Aug 4, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/0533
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piezoelectric resonator, particularly for electronic wrist watches, comprises an elongated piezoelectric crystal rod that oscillates in length-extension. Opposite faces of the rod are partially metallized; and short wires are secured tangentially to these metallized surfaces midway of the length of the rod. The wires extend perpendicular to the length of the rod and are secured at their other ends to metallized opposite surfaces of an elongated ceramic support which is parallel to and of about the same size and shape as the rod. The support also has metallized end faces which are secured to the inner ends of support wires that pass through a casing in sealed relationship and mount the support and rod in spaced relation from the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.