Patent ID: 6967297

Claim:
A sensor for detecting at least one of a rupture and a length change in a belt, said sensor comprising: a movable transmission element operatively connected to the belt; and an electrical switch having a carrier part and a contact system, said contact system comprising: a switching contact having a leaf spring with a contact surface arranged on a first end of said leaf spring; a fixed contact operatively associated with said contact surface; a first limb free on one end extending approximately from a first end of said leaf spring in the direction of a second end; a second limb free on one end extending from the second end of said leaf spring in the direction of the first end; wherein the free ends of the first and second limbs are clamped offset from one another on said carrier part of said electrical switch; and wherein, in the event of at least one of a length change and a rupture of the belt, the transmission element acts on a second end of said leaf spring of said switching contact, such that said electrical switch switches over from a first state to a second state in the manner of a cascade.