G - Physics
09
F
40/37
G09F 11/32 (2006.01)
Patent
CA 1294780
A B S T R A C T The invention provides improvements in display devices. Shaped guide plates 44 positively guide the suspension rods 4 of viewing sheets 3 around a roller 8 when each suspension rod 4 is engaged by cradles 11 carried by electrically-drive chains 10. A strap 50 that is rendered resilient by the inclusion therein of a spring 53 extends centrally down the rear of the device and prevents successive suspension rods 4 from becoming detached from the cradles 11 in this region. A gate which includes a stop 55 is provided at the foot of ramps 5 upon which the rods 4 are stacked to ensure that the rods will not become bunched or otherwise entangled on the ramps 5 and that the cradles 11 will positively pick up only one suspension rod 4 at each passage past the gate. A time delay switch 56 is associated with a microswitch 41 and will close to bypass the switch 41, after a predetermined interval of time,so that the drive of the device may re-start even if the power supply to the device had previously been switched off with the microswitch 41 in its open circuit position. Each rectangular display sheet 3 preferably comprises two layers which are secured to one another at the edges which coincide with the suspension rods 4 and along one of two longitudinal edges. The other edge is open except for two relatively short portions that are joined together at its opposite ends whereby webs carrying indicia may be entered between the layers, by appropriate flexing, and will remain trapped therebetween by the short joined together edge portions of the two layers.
564431
Cassan Maclean
Grosse Maurice
LandOfFree
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