US Patent 7909633 Wire connection apparatus

A terminal wire block includes a spring clamp and a screw clamp to hold an electrical wire in a fixed position using one or both of the clamps. The spring clamp includes a cage and a spring to push the wire against one of the walls of the cage. The screw clamp includes an externally threaded fastener such as a screw to hold the wire in place when the fastener is tightened. One or both of the spring clamp and the screw clamp may be operated independently of the other one of the spring clamp and the screw clamp. When operated together, the spring clamp and screw clamp provide additional integrity and security to the contact.