Preprogrammable recording system with automatic warning of time limit
US4339776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1979 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Aug 24, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording system for recording signals on a magnetic tape uses a recording apparatus and cassettes, each cassette containing a specific length of magnetic tape, and has a timer for setting time-preprogrammed automatic recordings. A detection unit determines the maximum time available for recording on a cassette placed in the apparatus and a comparator compares an output signal of the detection unit with a reference quantity which is a measure of the total time required for the preprogrammed automatic recording(s). When this required time exceeds the maximum time available for recording with this cassette, an alarm signal is produced. The cassette has marks which are sensed by the detection unit and which indicate the length of the magnetic tape in the cassette.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.