Electro-optic tuning indicator
US3959729A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Mar 25, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J1/045
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A receiver selectively and variably tunable to one of a number of broadcast stations has an electro-optic tuning indicator for providing a visual indication of a selected station. The indicator includes a station encoder having a plurality of sets of indicia representative of a plurality of frequencies of the broadcast stations which are arranged to move past a reading station as the receiver is tuned. Positioned at the reading station is an optical reader including a light source arranged on one side of the station encoder and a fiber optic bundle having its proximal end arranged on the opposite side of the station encoder for alignment with a set of indicia. A photoelectric device forming the input to an electrical digital decoder is coupled to the distal end of the fiber optic bundle. The output of the digital decoder is coupled to a digital display. When the receiver is tuned to a station, light is transmitted through a set of indicia aligned at the reading station and the fiber optic bundle to the electrical decoder where it is detected and translated into signals for activating the digital display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.