Driving device for driving or operating elongate display members at signs for consecutive, repeated presentation of series of images
US5161421A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19874
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a driving device for driving or operating elongate display members at signs for consecutive, repeated presentation of series of images, whereby said elongate display members (2) are driven through pairs of gear wheels (15, 16) having conical teeth and whereby a driving gear wheel (15) in each pair of gear wheels is provided on a drive shaft (6) and a driven gear (16) wheel in each pair is operatively connected with the elongate display member (2) to be driven. In this driving device, for being able to rotate the driving unit forming part thereof continuously in one and same direction of rotation and to ensure that the elongate display members can not come "out of phase" neither during rotation nor when they stand still in their display positions, the driving gear wheel (15) comprises a gear sector (20) which occupies only a part of the periphery of said driving gear wheel (15) such that said driving gear wheel (15), is in driving engagement with the driven gear wheel (16) only during a part of a revolution of said driving gear wheel (15) and the drive shaft (6) has a lock (21) which is provided to cooperate with said driven gear wheel (16) or with m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.