Reel-locking mechanism for compact tape cassette
US5402955A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1992 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Jul 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08721
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cassette has supply and take up reels with corresponding annular gears thereon. A pivotally mounted driving brake arm has an intermediately positioned pawl engaging the take up reel gear. An end of the driving brake arm is spaced from a coacting end of a pivotally mounted driven brake arm. An opposite end of the driven brake arm has a pawl for engaging the gear of the supply reel. When the tape is slack, the tape up reel incrementally rotates to tighten it, causing the take up reel pawl to incremental ratchet over the mating gear. This causes the driving arm to rotate and displace its end into abutting relation with the coacting end of the driven arm. Consequently, the ratchet of the driven brake arm rotates and its corresponding pawl disengages from the supply reel gear to allow the supply reel to incrementally pay out a length of tape sufficient to prevent overtightening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.