Dial-A-Weld Spot Welder

Circa 1930s

The 1930s saw a revolution in orthodontic appliances with stainless steel and acrylic replacing precious metals. This revolution was aided by the introduction of spot welders which were not susceptible to surges of power which burnt through appliances. 

The Dial-A-Weld allowed orthodontists to adjust the welding intensity, ensuring proper attachment of brackets and tubes to bands.