Hoist assembly for use on scaffolds

Claim 1

The combination of an adjustable portable scaffold with a hoist assembly to install fixtures from said scaffold, said scaffold having a pair of detachable leg assemblies and detachable connecting means rigidly uniting said leg assemblies and including a platform supporting frame and inclined braces attached to said frame, said leg assemblies having means to detachably secure said frame and braces at different adjusted levels, a platform removably supported by said frame, serving as a walkboard for persons standing on the same, said hoist assembly comprising a post, a tubular post holding means in which said post is fitted for support and lengthwise displacement, a manually operated elevation means mounted on the upper end portion of said tubular post holding means and engaging said post to displace the latter relative to said post holding means and to lock the same in adjusted position, a hook secured to said post holding means and removably engaging a side of said frame, an arm rigidly secured to said post holding means and spaced below said hook and extending transversely of said post holding means substantially equally on each side thereof and bracket means secured to the two outer end portions of said arm substantially equally spaced on each side of said post holding means and removably engaging said braces, so constructed and arranged that said hoist assembly can be quickly detached from said scaffold when not in use and said manually operated means remain easily accessible to a person standing on said platform for any adjusted level of said platform relative to said leg assemblies, and a fixture carrying head mounted on the upper end of said post for displacement therewith.