Changeable sign display device with improved panel suspension
US5018289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | May 10, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F11/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved display device, which includes an enclosure having first and second opposing planar sections each having at least one opening formed therein. A plurality of elongated spools are mounted inside the enclosure, a first pair of the spools being disposed at opposing each of the first planar section and aligned along a plane parallel to the plane of the first planar section, a second pair of the spools being disposed at opposing ends of the second planar section and aligned along a plane parallel to the plane of the second planar section. The spools have upper and lower belt engaging devices. A motor is operatively connected to at least one of the spools. Upper and lower endless belts operatively engage the belt engaging devices and sequentially connect the plurality of spools, effecting simultaneous rotation thereof. A plurality of panels of visual display material are yieldably connected to the endless belts along a pair of opposed edge portions of each of the panels and disposed to permit the viewing of at least one of the panels through each of the openings in the planar sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.