Leonard Weldon (1847-1901) emigrated to the Cohoes, Albany, New York, USA in 1879 aged 32.

He was the son of Reuben Weldon, who must have instilled his family with science & discovery, with Walter Weldon self taught science discoveries leading to Weldon Mud, Ernest James Weldon founding the dyeing and finishing business in Nottingham, and then Leonard leaving his family behind to go to America with is dyeing expertise, he in turn becoming developing technical textile machinery, and an inventor with patents in the USA and around the world.

In 1890 Klauder-Weldon Dyeing Machine Company was formed and registered in Pennsylvania that manufactured machinery for dyeing, with Leonard as the Vice President and business manager of the company that he held until his passing in 1901.

The board minutes on 3/1/1893 stated the general manager salary was fixed at $5,000 per year, with 30% of the net profits made in America over and above $25,000. He was a large stockholder in the corporation, such stockholdings being based upon his inventions used in the manufacture of machinery, and the volume of business transacted, with a partnership interest in the net profits with the corporation.