Card – picture – or sign exhibiting – Changing exhibitor – Motor operated
Patent
1997-12-12
1999-11-09
Green, Brian K.
Card, picture, or sign exhibiting
Changing exhibitor
Motor operated
40518, 2424121, 242416, G09F 1118
Patent
active
059790938
ABSTRACT:
A web tension maintaining roll in a scroll sign module is arranged with its axis parallel to a rotatable second roll, both rolls being arranged for rotation between laterally spaced apart side frame members. For each roll, a short shaft projects from opposite side frame members toward each other for the roll to rotate about the common axis of the shafts. A motor driven drive shaft whose axis is transverse to the axes of rotation of the rolls has a worm fastened to the shaft adjacent each of the rolls. The worms are drivingly engaged, respectively, with worm wheels that are supported for rotation about the axis of the short shafts and about the rotational axis of the rolls. The worm wheel for the tension roll is coupled in driving relationship to the tension roll by way of a spiral spring whose inner end is connected to the worm wheel and whose outer end is connected to the tension roll. The motor driven main drive shaft has a knob on at least one end or a cable connection that provides for turning the main drive shaft manually to provide the option of manual operation or motor operation of the sign module. The worm and worm wheel roll drive mechanism precludes roll backlash.
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patent: 5003717 (1991-04-01), Trame et al.
patent: 5673504 (1997-10-01), Brown
Gross Philip R
Harruff Robert J
Everbrite Inc.
Green Brian K.
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