Magnetic tape running state and tape run amount display device
US4237373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Aug 29, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K21/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is a magnetic tape running state and tape run amount display device which displays visually the running direction and speed or the run amount and direction of the magnetic tape. An up-down counter is provided with a clock input signal having a pulse generated in correspondence with the run of the tape and is also provided with a count control signal. The count control signal has an UP signal generated when the tape is being transported in a first or forward direction, and has a DOWN signal generated when the tape is being transported in a second or reverse direction. The up-down counter provides a binary output count signal to a display circuit in correspondence with the clock input signal and the count control signal. The up-down counter can also be provided with a reset input responsive to a reset signal which acts to reset the count back to logic 0. The display circuit provides a visual representation of the binary output signal, and may include a first binary-to-digital decoder and a second binary-to-digital decoder, each being responsive to a preselected portion of the binary bits provided by the up-down counter. A plurality of light emitting diodes are c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.