Patent ID: 6052931
Filing Date: 2000-04-25
Classification: G09F,Y10T

Abstract:
A rotating sign assembly comprising:a plurality of rotatable multi-sided sign segments;a torque transmitting member rotatable about a first axis of rotation;means for rotatably driving said torque transmitting member;a torque limiter comprising:a first engagement member fitted on said torque transmitting member for rotation therewith about said first axis of rotation, said first engagement member having a first engagement surface;a second engagement member supported for rotation about said first axis of rotation and having a second engagement surface abutting said first engagement surface;a coupling for coupling said engagement members comprising a projection disposed on one of said engagement surfaces and a recess defined in the other engagement surface, said recess positioned and shaped to engage said projection so that when said recess engages said projection only a limited amount of torque can be transmitted from one of said engagement members to the other engagement member and so that when said limited amount of torque is exceeded said projection disengages from said recess allowing one of said engagement members to rotate while the other engagement member remains stationary; said projection having adjustment means to permit an increase or decrease in said limited amount of torque allowed;said second engagement member operable to rotate one of said multi-sided sign segments.