Pulley system for telescoping crane

AI Thread Summary
The discussion focuses on understanding the pulley and gearing system of a telescoping crane, specifically how it allows the front telescoping sleeves to move in unison while adjusting the back counterweight for balance. The mechanism also ensures that the camera mount remains level as the crane is tilted up or down. Participants are seeking insights into the design and functionality of these systems. The provided links showcase examples of such cranes, emphasizing the need for a reliable and efficient pulley system. Overall, the conversation aims to clarify the engineering behind these crane mechanisms.
anchange
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Hey guys,
I'm trying to figure out how the pulley system / gearing works on something like this -
http://www.chapman-leonard.com/products/telescoping%20crane%20arms/15'%20Telescoping%20Hydrascope.htm

Basically some kind of pulley system make the front 2 telescoping sleeve move in and out in unison as well as making the back counter weight slide to compensate for added or subtracted force on the front end.

In addition the places that the camera is mounted stays level to the base as the crane is arced up or down.

Any ideas?
 
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