Abstract: A nut holder assembly for use in bolting an attachment to a slotted supporting member by bolts received in a one of a respective nuts included in the nut holder assembly.

Abstract: An end of travel arrangement for shutting down an assembly line conveyor when an ergo assist arm at a conveyor station moves beyond an end of travel limit point, the end of travel arrangement including a trolley rail mounted alongside one of a pair of runway rails for supporting an ergo assist arm carriage with the trolley movable along the trolley rail. One or more proximity switches are mounted aligned with a home position on the trolley and detect when the trolley is displaced from the home position by contact of a feature on the carriage with the trolley and generate signals immediately initiating shutting down of the assembly line conveyor.