Obstacle detector for a descending or ascending load
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United States of America Patent
Stats
-
Mar 27, 1984
Grant Date -
N/A
app pub date -
May 7, 1982
filing date -
May 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An obstacle detector is disclosed, being designed to automatically brake a descending or ascending load suspended on at least two spaced cables, should an obstacle be encountered in the path of the load. The detector comprises at least two winch drums and a rotatable horizontal rod having at least two laterally-spaced levers projecting radially therefrom and inclined on opposite sides of the rod. One end of each cable is secured to a drum, passes through a pulley supporting the load and is secured to a corresponding lever at its other end. A change in the tension of one of the cables, due to an obstacle, results in a small rotation of the rod, thus activating an electric sensing device which effectively shuts down the motor driving the winch drums.
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