Automatic record changer with cycle delay to facilitate changing of thin, lightweight records
US4023813A · kind A · utility
3Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1976 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Jan 12, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19874
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The record changing cycle of an automatic record changer having an umbrella type centering spindle is modified so that a delay is provided at the appropriate point in the cycle when the bottom record is to be released from the record stack. This delay is sufficient that a thin, lightweight bottom record has time to become unstuck from the remainder of the stack and fall downwardly before the record changing cycle is resumed, thereby preventing malfunctioning of the record changer when changing thin, lightweight records.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.