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United States of America Patent
Stats
-
Jan 18, 1983
Grant Date -
N/A
app pub date -
May 13, 1980
filing date -
May 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A crane having a novel data processing system which uses a microprocessor (22), to calculate mathematically the actual jib radius (R.sub.1) from inputs corresponding to jib head angle elevation, jib base elevation and jib length from head (9) to base (8). The system provides actual data which can be fed to a display (10) and which can actuate alarms (24), (26) on reading a safe load stored in a load table in a microcomputer of which the microprocessor forms a part. The actual data can also control motion cut offs, automatic luffing and automatic stowage. A novel dynamometer (30) is also included which can measure crane hoist loads, speed and direction.
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