| 摘要 |
A resistance welding electrode for welding nuts or other items which have apertures to parts provided with corresponding apertures, consisting of a main water-cooled body upon which os located an adaptable welding face and containing a sliding pilot pin which passes through and extend beyond the welding face. The nut or the like to be welded is palaced upon the pilot pin, and the part to which it is to be welded is located on the welding face. To weld, the pilot pin is depressed so that the nut is pressed against the part to which it is to be welded. The base of the pilot pin is equipped with a piston which slides within a compression chamber within the main body, so that when the weld is completed and the pressure on the pilot pin is released, the compressed air in the said chamber returns the pin to its normal position.
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