Event data recording apparatus with digitally encoded time and date
US4122498A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | May 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/323
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data recording apparatus including a data recording circuit for recording event data provided by a data source on a first track of a magnetic tape and a time recording circuit which effects the recording of time reference data for the event data on a second track of the tape, the time recording circuit including a digital clock which provides encoded data representing month, day, hours and minutes for recording on the tape and an identification data source which provides encoded data representing an identification number for the data source for recording on the tape, the time and identification data being recorded on the tape in a bi-phase format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.