Touch type contactless switch structure for electronic wristwatches having insulative member precluding establishment of shunt path by foreign matter
US4059956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1976 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Jan 7, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S200/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic wristwatch is provided with a touch type contactless switch structure for the purpose of altering the operational mode thereof, which comprises a pair of switch electrodes one being disposed on the viewing window in the engagement relationship with a portion of the operator body and the other being constituted of the enclosure thereof made of electrically conducting material. The one electrode is a film of transparent conductive material and, has an end area leading to the movement accommodated within the interior of the wristwatch. Both of the electrodes are isolated from each other via an electrically non-conducting member of low-melting point glass disposed therebetween which includes an extension overlaying the one electrode at the peripheral portion of the viewing window for allowing for moisture invasion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.