I have procured a small spot welder known as a “Dial a Weld.” I believe it was used in the 1970s to weld the metal frames for braces. It appears to be a fairly simple device that uses a rotary telephone dialer for consequent impulses from an electrical capacitor.
I have not been able to track down a user’s manual or find a user. Any provided assistance would be welcomed.
@Mouse , the internet is a friend (photo provided below).
Success is the progressive realisation of a worthy ideal. —Earl Nightingale.