Micro-miniature mercury tilt-type inertia switch
US3993882A · kind A · utility
0Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Oct 7, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H29/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A micro-miniature mercury tilt-type inertia switch which may be utilized in a light-emitting, solid state, digital-display watch to activate a digital read-out circuit by a "flick-of-the-wrist" motion. The switch is normally in a closed position, i.e., a globule of mercury contacts both electrodes, and a tilt force of approximately 1.4 G's is required to open the circuit. A movement of the switch back to 2.degree. or less below horizontal will reclose the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.