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.

The Trundle Engineering Company was an industrial engineering management consulting company based in Cleveland, Ohio. Clients would hire Trundle Engineering Company to perform studies on their organization or operating methods. One aspect of the business was the design and manufacture of custom machinery for increased efficiency. This album is a salesman sample photograph album providing an overview of inventions and technology developed by the Trundle Engineering Company. Machinery represented here includes spiral meat-cutting machine, matchbook cover book-cutting machine, traffic signal control boxes, spinning machine for making artificial silk, ice cream freezing machinery, remote control spotlight, and a golf ball center compression test machine.

William Sellers & Co. was an iron works that manufactured machine tools used for turning, planing, shaping, drilling, boring, or cutting metal or wood. The company was founded in 1848 as Bancroft & Sellers by mechanical engineers and inventors Edward Bancroft (1811-1855) and William Sellers (1824-1905). The records consist of five volumes, as well as correspondence from William Sellers and the Sellers firm.