Position sensing and indicating device
US4270171A · kind A · utility
Inventors
Key dates
| Filing date | Mar 7, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Mar 7, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9645
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The position of an operator's finger on a transducing surface is used for controlling the level of utilization devices including theater lights controlled by an automated theater light control system. The transducing surface, which may be either an analog or a digital device, is elongated in shape and is immediately adjacent to an elongated display having individual light-emitting devices to indicate the level of the utilization device being controlled. Circuitry connected to the transducing surface produces a first signal to indicate when an operator's finger is present on the transducing surface, and it produces a second signal to indicate the position of the operator's finger on the transducing surface. The second signal is supplied to the display, and the first and second signals are supplied to the utilization devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.