Abstract An inexpensive rapidly attachable, detachable and rapidly adjustable locking assembly for combining with a ladder for locking the ladder in place at any desired position against a structure and thereby prevent injurious ladder slippage during use. The locking assembly is particularly suitable for a ladder of the type having two sides with each side having a pair of rails and web therebetween in substantially the cross sectional form of an I beam and hollow rungs with each of the rung ends fixed to the respective adjacent web. The locking assembly has a metal rod extending through one of the hollow rungs with the rod ends projecting beyond the sides of the ladder, a spacer on each of the ends of the metal rod rest against the outside of the web and project beyond each of the sides of the ladder to form a base for a bracket fixed to each of the metal rod ends, each bracket having an eye bolt, a pair of substantially equal length rods for each of the brackets, each of the equal length rods having a hook at one end and screw threads a substantial distance along the respective rod at the other end, the threads on one of the equal length rods being right hand and on the other being left hand and screwed into opposed ends of a turnbuckle having a length approximately equal to the combined length of the screw thread portions on the associated equal length rods, and an eye formation for each of the ladder sides adapted for attaching to the structure against which the ladder is to be locked in place and adapted for receiving the hook on the other of the turnbuckle rods.
In a locking assembly for a ladder of the type having two sides and hollow rungs between the sides with each of the two ladder sides having a pair of rails and connecting web therebetween in the cross sectional form of substantially an I beam and the hollow rungs having two ends with each rung end fixed to the web adjacent the respective rung end, the combination of a pair of brackets with each of said brackets having a screw eye; means for fixing one of said pair of brackets in place at one of said sides and the other of said pair of brackets in place at the other of said sides, said means including a bracket rod having two ends and a cross sectional dimension for placing in the hollow of one of said rungs and being of a length such that said rod ends protrude from the respective sides of the ladder and are adapted for fastening the brackets at the respective sides of the ladder and including a spacer at each end of the bracket rod, each spacer having a surface for engaging said web and an opposed surface for clearing the associated ladder side to form a base for the associated bracket; a turnbuckle for each of said sides, each of said turnbuckles having opposed ends and carrying in each respective turnbuckle end an elongated turnbuckle rod, one of the rods for each turnbuckle includes a hook formation for fastening to said respective bracket; and means for rapid manual attachment and detachment of the other rod of each of said turnbuckles to a structure to which said ladder is to be locked.
Claim 2
Dependent Claim
277 words
In a locking assembly for a ladder of the type having two sides and hollow rungs between the sides with each of the two ladder sides having a pair of rails and connecting web therebetween in the cross sectional form of substantially an I beam and the hollow rungs having two ends with each rung end fixed to the web adjacent the respective rung end, the combination of a pair of brackets with each of said brackets having a screw eye; means for fixing one of said pair of brackets in place at one of said sides and the other of said pair of brackets in place at the other of said sides, said means including a bracket rod having two ends and a cross sectional dimension for placing in the hollow of one of said rungs and being of a length such that said rod ends protrude from the respective sides of the ladder and are adapted for fastening the brackets at the respective sides of the ladder and including a spacer at each end of the bracket rod, each spacer having a surface for engaging said web and an opposed surface for clearing the associated ladder side to form a base for the associated bracket; a turnbuckle for each of said sides, each of said turnbuckles having opposed ends and carrying in each respective turnbuckle end an elongated turnbuckle rod, one of the rods for each turnbuckle includes a hook formation for fastening to said respective bracket; and means for rapid manual attachment and detachment of the other rod of each of said turnbuckles to a structure to which said ladder is to be locked.
Claim 3
Dependent Claim
64 words
The combination as in claim 1 wherein said means for rapid attachment and detachment includes a hook formation on the other rod of each of said turnbuckles and a pair of eye formations with each eye formation being for receiving a respective one of said last mentioned hook formations and adapted for fastening to said structure to which the ladder is to be locked.
Claim 4
Dependent Claim
23 words
The combination as in claim 2 wherein said adaptation for fastening to said structure is a wood screw formation on said eye formation.
Claim 5
Dependent Claim
27 words
The combination as in claim 2 wherein said adaptation for fastening includes a rigid member fixed to said eye formation and adapted for nailing to said structure.