This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
USPatent.Wilson.RotaryHook.figuresto. en Figures to from US patent for rotary hook sewing machine United States Patent and Trademark Office USPTO and Allen Wilson inventor PDUSGov Sewing machine parts
Page 2023 Free-images.com. All images are Public Domain