1926

Karl (47) Receives A Patent For His Strain Gauging Method “Dehnlinienverfahren”. He Uses This Technique To Determine The Appropriate Stress Distribution To Avoid Fractures During Alternate Loading. A Resin Coating Would Be Applied To The Surface Of The Tested Component. During The Testing Of The Component, Hairline Cracks Would Appear In The Resin, Showing The Actual Areas Of Tension.