Electronic range indicator for a motor vehicle
US4882572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/105
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electronic range indicator apparatus in which a switch array powered by the vehicle ignition voltage is used to indicate the selected transmission range during both on and off periods of the vehicle. During on periods of the vehicle, the ignition voltage is transmitted through the closed contacts (if any) of the switch array, and an electronic control module decodes the output of the switch array and lights the indicator indicia corresponding to the selected range. During off periods of the vehicle, the ignition feed to the switch array is open circuited. In such case, the control module intermittently reverses the potential across the switch array, and lights the appropriate indicator indicia using a reverse logic decode scheme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.