How was the diagram of the zipper in the 1800s?

In the 1800s, the zipper as we know it today did not exist; instead, various fastening devices were developed, such as the "automatic continuous clothing closure" patented by Elias Howe in 1851. This early design featured interlocking metal hooks and was cumbersome and not widely adopted. It wasn't until the late 19th century that a more practical version, designed by Whitcomb Judson, was patented in 1893, which was still not very successful. The modern zipper design, using a more efficient interlocking mechanism, didn't emerge until the early 20th century.