45 RPM Automatic play adaptor
US4559623A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1984 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | May 17, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/0281
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A 45 rpm record adaptor body is positioned at the center of the turntable and has a record supporting shelf on one side and a shoulder opposite said shelf. The distance from the inner edge of said shelf to the bottom of said shoulder is slightly greater than the hole diameter of a 45 rpm record so that one side of a stack of 45 rpm records placed on said body is supported on said shelf and the other side of the stack is supported on said shoulder. The shelf is undercut to a point at which the distance to the bottom of said shoulder is less than the hole diameter of a 45 rpm record to permit an ejected record to move off of said shoulder and onto the turntable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.