Actuator for sliding panel signs
US4783923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F11/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sign has slat panels mounted for sliding laterally on one side of a base plate and bars having cam followers mounted on the other side. Each bar has a pin, some of which project through slats in the bars and all of which project through slots in the base plate to terminate in a hole in the panels, respectively for driving the panels laterally in response to sequential lateral shifting of the bars. A first driven gear has axially extending cam pins of increasingly greater lengths to engage successive followers and shift the bars and panels to present a series of pictures. A second commonly driven gear has one cam pin which orbits in the opposite direction for periodically engaging all followers simultaneously and driving said bars back to initial position to start a new display cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.