Patent ID: 6878897

Claim:
A device for welding a weld nut to a work piece, the device comprising: an upper electrode interconnected to a welder; a locator pin located in a receiver of an electrode base; the locator pin inserted into the weld head and the weld head in contact with the receiver of the electrode base; a keyway located in the locator pin for receiving pressurized air from the electrode base; an air regulator for supplying and adjusting the pressure of the air to the electrode base; a digital pressure switch connected to the air regulator and the electrode base for reading the air pressure and comparing to a pre-determined air pressure; a power supply relay connected to the digital pressure switch for providing a signal to the welder and powering the digital pressure switch; and whereby the insertion of the weld nut and work piece onto the locator pin and between the weld head and upper electrode results in a pressure reading to the digital pressure switch resulting in a response from the welder.