Abstract: A safety device for telecommunication equipment wherein a telecommunication circuit is promptly grounded when overvoltage is applied to the circuit or overcurrent is led to it and in which the production of excessive head and of damage to the communication equipment is prevented.

Abstract: A safety connector providing an overcurrent protective element, an overvoltage protective element and bimetal connecting terminals, in which the overcurrent protective element includes an upper terminal and lower terminal on the upper and lower part of the body, and which includes bimetal connecting terminals within the body, and a heating coil connected to the upper terminal and to a bimetal connecting terminal. Another bimetal connecting terminal is connected to the lower terminal. An overvoltage protective element is mounted on the bimetal connecting terminals on the electrodes and grounding electrode, respectively, and leading ends of the bimetal connecting terminals are placed to face each other.

Abstract: A safety device for protecting communications equipment that is coupled to a communications line. The device includes a safety connector having overcurrent and overvoltage protection means therein for connecting the communications line to ground upon occurrence of an overcurrent or overvoltage on the line. The safety device includes a housing and receptacles for connecting to input and output terminals of the communications line and to a ground terminal, wherein the terminals are on a terminal stand that serves many communications lines and receives many safety devices thereon. The overcurrent protection means employs a bimetal element that is heated by a heating coil connected in the communication's line. The overvoltage protection means includes a gas discharge tube which also may include bimetal elements.