Abstract: This is to provide a safety hook 1 having a function of preventing and/or delaying removal of an exhibit 7 by unauthorized persons and a function of preventing unexpected display falling, and has good operability. The safety hook 1 has a grip body 17 capable to be fixed to a hanging wire 3, and a hook 23 for hanging an article, and connected to the body (17). Further, it has a hook cover 21 displaceable between a closed position for closing an opening portion 23z of the hook 23 and an open position for opening the opening portion 23z, and a cover cap 19 which hinders displacement of the hook cover 21 from the closed position to the open position.

Abstract: A tow bar and hitch assembly for coupling together industrial carts so they can be towed in train-like fashion. A hitch member is fixed to the bed of a towing cart and receives a tow bar rotatably and slidingly supported by the bed of a towed cart. When not in use, the tow bar can be retracted to a stowed position beneath the towed cart by removing it from the hitch, rotating it to clear an abutment with a stop member which locks the tow bar against movement when extended, and then sliding the tow bar rearwardly.

Abstract: A train coupling system includes a turnbuckle shaft having opposite ends threaded into rod end bearings. Each of such bearings includes a ball secured in a clevis and each such clevis in turn, is pivotally mounted in a clevis on a corresponding train car such that there is automatic alignment when and as the train cars travel on the road bed.