Abstract: A sensing system for use on a tracked vehicle transporation system forms a sensitive floor beneath the lip of a platform. The floor is made up of a plurality of metal plates mounted on spring supports so that they can be slightly depressed if an abnormal load is applied to them. Such depression changes the state of a switch or like means through the intermediary of a cable and a lever.

Abstract: A transport installation comprises a guide track and at least one car which moves on the track. A circulating cable is provided near the track and a gripping device on the car grips the cable. Lateral retaining members are fixed to the car and accommodate the cable at least when it is gripped by the gripping devices. There are at least two such lateral retaining members disposed on respective sides of the gripping device. They are adapted to hold the cable betweem them at least substantially in a vertical plane.

Abstract: A transport installation comprises a guide track and at least one car which moves on the track. A circulating cable is provided near the track and a gripping device on the car grips this cable. This device comprises two gripping members movable relative to each other and urged into a closed position by a closing force developed within the car. A force distributor mechanism is disposed between at least one of these gripping members and the point at which the closing force is applied. Two force transmitting branches are coupled to the force distributor mechanism. Each transmits part of the aforementioned closing force. A first pivoting support carries one of the gripping members and has a first of these branches directly articulated to it. The othe branch is articulated to a second privoting support. On the second pivoting support are an engagement device and an abutment member.