Safety control for cranes
United States Patent 3269560

Inventors:
Knight, Sidney G.
Publication Date:
08/30/1966
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Assignee:
DROTT MFG CORP
Primary Class:
212/278
Other Classes:
212/282
International Classes:
B66C23/90; B66C23/00
US Patent References:
3123814
3148659Safe load indicating devices for cranes
3173550Remote controlled crane
3200963Moment comparator
Foreign References:
DE1162987B