1. A PROTECTION SYSTEM FOR AN ELECTRIC MOTOR AND MECHANISM DRIVEN BY SAID MOTOR, COMPRISING A CURRENT SUPPLY CIRCUIT FOR ENERGIZING SAID MOTOR, A SAFETY SWITCH FOR OPENING SAID CIRCUIT TO DE-ENERGIZE THE MOTOR, SAID SAFETY SWITCH HAVING A CURRENT-RESPONSIVE DELAY LINK, A CIRCUIT SUPPLYING CURRENT TO SAID DELAY LINK, A SWITHC RESPONSIVE TO A MALFUNCTION IN SAID DRIVEN MECHANISM AND IN THE CIRCUIT OF SAID DELAY LINK, SAID MALFUNCTION SWITCH BEING OPERABLE TO INCREASE THE CURRENT FLOW THROUGH SAID DELAY LINK AND THEREBY ACTIVATE SAID DELAY LINK IN THE EVENT OF A MALFUNCTION, AND AN EMERGENCY RELAY HAVING AN OPERATING ELEMENT IN THE CIRCUIT OF SAID DELAY LINK AND RESPONSIVE TO CURRENT FLOW THROUGH THE DELAY LINK, SAID RELAY BEING CONNECTED WITH SAID MOTOR ENERGIZING CIRCUIT TO DE-ENERGIZE THE MOTOR UPON INTERRUPTION OF CURRENT THROUGH SAID DELAY LINK.