* Early forms: Early forms of slip gauges, sometimes called "Johansson gauges" after Carl Johan Johansson, existed in the late 19th century. However, these were less precise and not widely used.
* Johansson's Contribution: In the early 20th century, Carl Johan Johansson (Swedish engineer) made significant advancements in their design and manufacturing process. His contribution was primarily focused on improving the accuracy and standardization of slip gauges. He developed the "wringing" technique, which ensured precise contact and minimized errors.
* Others involved: Other engineers and manufacturers played a role in the evolution of slip gauges, including C.E. Johansson, F.W. Taylor, and Henry Ford. They helped refine the manufacturing processes and popularize their use.
Therefore, it's more accurate to say that slip gauges were developed through the contributions of several individuals, with Carl Johan Johansson being a key figure in their advancement.
