Sign suspension system
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United States of America Patent
Stats
-
Mar 9, 2004
Issued Date -
N/A
app pub date -
Jun 3, 1996
filing date -
Mar 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A remote-controlled motor-driven drum is provided to wind and unwind a cord which holds a self-balancing sign carrier. The sign carrier, which has telescoping rails, is adjustable in width. Its center rail includes two sheaves to receive the cord and lead it from the drum back to an end secured to the ceiling. Rotation of the drum raises and lowers the sign carrier and a sign carried by it. The sheaves on the carrier also serve to make the unit self-balancing. The motor responds to actuating signals for raising and lowering the sign and to safety features. Safety features include a limit switch which stops the motor when an object gets in the way, an overload control which stops the motor if excessive weight is detected, and the use of the motor for braking.
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