Line protector for communications circuit

A line protector comprising a gas-filled tube therein, at least one pair of electrodes separated by insulation and defining an arc gap, connectors electrically insulated from each other and being in respective electrical contact with the electrodes, each connector having an electrically conductive surface external of the gas tube and surrounding the electrodes, a resilient conductive member outside of said tube and having a first part in proximity with a first of said external surfaces and also having a second part in proximity with a second of said external surfaces, the resiliency of said conductive member biasing said conductive member in a direction to effect electrically conductive connection of said external surfaces, said first and second parts respectively being in substantial surrounding relationship with said first and second surfaces, and a meltable dielectric substance interposed between said conductive member and said tube, said dielectric substance being meltable upon heating due to an overcurrent condition in the tube, said substance being normally engaged by said conductive member to prevent electrically conductive connection of said surfaces except upon melting of said substance so that upon said melting a direct short circuit is provided between said external surfaces over substantial areas of engagement with said member that surrounds said surfaces.