Card – picture – or sign exhibiting – Changing exhibitor – Motor operated
Patent
1988-04-06
1990-02-20
Wilson, John J.
Card, picture, or sign exhibiting
Changing exhibitor
Motor operated
G09F 1100
Patent
active
049014609
ABSTRACT:
A display device for displaying a number of indicia one after another has shaped guide plates (44) to positively guide the suspension rods (4) of viewing sheets (3) around a roller (8) when each suspension rod (4) is engaged by cradles (11). 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 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.
REFERENCES:
patent: 2326179 (1943-08-01), Sneed
patent: 2395947 (1946-03-01), Walker
patent: 2729007 (1956-01-01), Littman
patent: 3568345 (1971-03-01), Grosse
Jewell Poster Machines Limited
Stone Cary E.
Wilson John J.
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