Patent ID: 6963202

Claim:
A testing interface for a railroad signal relay that has a terminal provided with a pair of contact components which, when closed, establish a circuit to the relay coil and, when open, interrupt the circuit to the relay coil, said interface comprising: a conductivity device for providing connections to test equipment, including a housing having a pair of spaced contact lugs insulated from each other and projecting therefrom for engagement with respective contact components when open, a pair of contact members in said housing electrically connected with respective lugs, and yieldable means in said housing normally maintaining said contact members in a closed condition, said housing having an access opening therein aligned with said contact members, and a connection paddle having a contact head presenting at least a pair of opposed contact surfaces insulated from one another, and leads extending from said surfaces for connecting the contact head to test equipment, said contact surfaces being configured to engage respective contact members and shift the members to an open condition against the bias of said yieldable means upon insertion of said contact head into said access opening in the housing, whereby to establish continuity from each of the contact components to a corresponding lead in the paddle to enable test equipment to be interposed in the relay circuit.