Line protector for communications circuit

摘要

A line protector for communications circuits comprises a gas tube having external contact surfaces for connections to communication lines and to ground. A conductive member is proximate to the contact surfaces that are associated with the communication lines. A dielectric substance interposed between the conductive member and the last-mentioned contact surfaces melts upon overheating of the protector resulting from the excessive line current. The conductive member, due to its resiliency, engages the subjacent contact surface or surfaces thereby resulting in a direct short circuit between the protected line and ground. A shield over at least part of the gas tube in the region of the conductive member prevents potting compound or foreign matter from obstructing the function of the conductive member.