Sensor, safety device and lift device

摘要

The sensor has a contact bridge and a contact receptacle for receiving the contact bridge. The contact bridge is arranged in such a way that a closing state of a lift door is determined by connection of the contact receptacle and the contact bridge. A transmitter and a receiver are provided for transmitting and receiving an optical signal respectively. The transmitter and the receiver are arranged on the contact receptacle. The contact bridge comprises a transmission element for transmitting the optical signal. Independent claims are included for the following: (1) a safety apparatus for lift apparatus; and (2) a lift apparatus.