device for the prevention of quetschens scherens or a foreign body

摘要

One of the moveable parts (1,2) has a relatively moveable solid barrier (3). This is fastened at a distance via electrical contact points (4), forming a three-point formation. The distance is larger than a max. required braking distance (W) to stop the movement. A movement of the barrier relative to the part, causes a contact break in at least one of the elements, and therefore interrupts a normally closed circuit. The barrier is flexibly supported via guide pins (5). Each pin carries a contact bridge (6) to form a closed current circuit.