Finding Aids

Fred C. Ielfield (1864-1948) was a mechanical engineer and inventor. This collection consists of twelve patents for mail canceling and postmarking machinery, corn-husking machinery, and a cereal cutter, all invented by Ielfield.

Thomas William Harvey (1795-1854) and his son, Hayward Augustus Harvey (1824-1893), were two important inventors in the arts of metalworking and metallurgy. The Harvey Steel Company constructed a furnace for making file and tool steel in Jersey City, New Jersey, in 1887. In 1889, the company erected a much larger plant near Brills Station in Newark, and expanded it into the treating of armor plate. Thomas W. Harvey is represented in this collection by a selection of documents covering his business career. These include deeds to family property. There are small amounts of correspondence regarding his inventions and the patent laws, including an "Essay upon Iron," affidavits regarding his screw machine, and sketches for several inventions. The papers of Hayward Augustus Harvey include copies of patents and drawings of his various inventions and documents arising from patent litigation. However, the bulk of papers concern the Harvey Steel companies and the Harvey process.