Switch having raised contact features and a deflectable substrate
US5856641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1998 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Jan 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/078
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable rate pressure sensitive electrical device or switch. The switch includes a first substrate and a plurality of electrical circuit traces thereon. A first electrical trace is provided having a first set of raised contact features or bumps projecting from a prevalent planar portion of first electrical trace. At least a second electrical trace is provided having a second set of raised contact features or bumps extending above a planar portion of second electrical trace. The first and second electrical traces and associated raised contact features are constructed and arranged so that the height of the first set of raised contact features is greater than the height of the second set of raised contact features. A second substrate is provided with an electrically conductive element. At least one of the first and second substrates is deflectable and at least one of the first and second substrates is moveable with respect to the other so that the second substrate can make contact with the first set of raised contact features in a first position, and in a second position the second substrate can make contact with both sets of raised features to provide an electrical path across the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.