![Private Label Trade Names on American Pocket Watches: The Lincoln Watch & Jewelry Company: Part 11: The Practical Effectiveness of the Landis Automatic Regulator img](https://blog.pocketwatchdatabase.com/wp-content/uploads/2021/11/Illinois-16s-Model4-RegulatorScrew-Length-1024x1024.jpg)
Pictured: Measurement on a Standard Regulator Screw from 16-Size Illinois Model 4 (5.25mm) The patent application submitted by Arthur Bonnet in March 1910 for his automatic temperature compensating screw indicates the effectiveness relies on using softer steel with less carbon content. In 1910, Bonnet’s design...