Abstract: An overload warning device for use in a crane having a telescopic jib which includes, in a transmission between a slave jib and a pointer, a bank of cams each appropriate for a different length of jib, a common follower cooperable with the cams, and a selector mechanism operable automatically in response to change in the jib length for effecting relative movement between the follower and the cams to bring the follower into cooperation with the cam corresponding to the newly selected jib length.
Type:
Grant
Filed:
February 15, 1977
Date of Patent:
July 4, 1978
Assignee:
Weighload Limited
Inventors:
Brian George Nixon, Ian William Stimpson