Variable speed film transport interlock system and method using same
US4815013A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Jul 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B31/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A variable speed film transport interlock control system for allowing a plurality of film audio elements to be run in synchronization with each other with at least one film element running at a different selected speed than the other elements. The system generates a modified drive signal from a standard system drive signal such that the modified signal corresponds to a speed with a fixed ratio to the speed of the standard drive signal under all operating conditions. This permits the modified signal to drive a film transport device, such as a recorder or reproducer, at a different speed than the other transport devices while maintaining synchronization with the other devices during forward or reverse, stopping and starting, high speed or low speed operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.