Self centering hub for flexible recording discs and the like
US3968972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Jun 21, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diametrically-enlargeable cylindrical drum portion, preferably comprised of a plurality of movable segmental elements, each of U-shaped or other configuration having a pair of spaced legs or sides, which are resiliently flexible toward one another, mounted in a circuitous pattern on a rotatable member to form outwardly-projecting inner and outer generally concentric annular shoulder formations. The outer such formation provides a segmented hub for receiving a disc by its center opening, such hub being expandable against the opening in the disc to center the latter, as a result of moving a tapered actuator against the inner such annular formation, such actuator preferably comprising a conically angled ridge formation on a rotatable element which is movable into registering contact with the first such member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.