United States Patent
US Patent 4584620: Measuring cassette for checking magnetic head…
US 4584620 · granted 1986-04-22
| Patent Number | 4584620 |
|---|---|
| Title | Measuring cassette for checking magnetic head alignment in a tape cassette recorder |
| Filed | 1984-03-29 |
| Granted | 1986-04-22 |
| Inventor(s) | Matthias Dopp, Erhard Schmidt |
| Assignee | US Philips Corp |
| CPC Classification | G11B5/48, G01B7/14, G01B7/00 |
| Number of Claims | 1 |
Abstract
A measuring cassette for checking magnetic head insertion distance and tape guide height in a magnetic tape cassette machine. A spring tongue in the cassette has at least one strain gauge on its surface to measure tongue bending, and is arranged to be deflected by insertion of the head into the cassette so as to sense the head surface or tape guide alignment with respect to the cassette.
Claims Summary
1. A measuring cassette for measuring the position of at least one magnetic head in a magnetic tape cassette recorder with respect to at least one coordinate defined by (i) a tape transport path along which a magnetic tape of a magnetic tape cassette is passed, and (ii) a plane of tape transport along the face of the magnetic head during play operation of the recorder with the head in the play position, said cassette comprising:a frame,