The Lamson & Sessions Company was a top manufacturer of bolts, nuts and other fasteners. In 1866, the Mt. Carmel Bolt Company was formed by brothers Thomas H. (1827-1882) and Isaac P. Lamson (1832-1912) with Samuel W. Sessions (1824-1902) in Southington, Connecticut. The company moved to Cleveland, Ohio in 1869. During World War II, the company was one of the largest manufacturers of fasteners in the United States. In 1981, the company sold its industrial fastener division to Russell, Burdsall & Ward Corporation of Cleveland, Ohio. Lamson & Sessions Company survives today through two business segments: Carlon and Lamson Home Products.

The collection contains nineteen 16mm films dating from the 1940s to 1973. Many of the films are documents of employees working in Lamson & Sessions factories. Some of these depict female employees in the workplace. Several more show machines and presses being run in the creation of bolts or nuts.

Series III, Notes, reference material, and works by Hoopes include typed and printed manuscripts relating to his two books, Early Clockmaking in Connecticut (1934) and Connecticut's Contribution to the Development of the Steamboat (1936), as well as an article, "Special Production Machinery" (1950). There are notes on eighteenth-century patents and collections of patents issued to Andrew C. Campbell and for hook-and-eye closures. Topics in this series include cams, power press design, lock nuts, orreries and clocks, early American inventors, and beauty in design. This series also includes the card catalogs of Hoopes' compiled bibliographic information on early American inventions and physical sciences. Finally, there is Hoopes' manuscript of Technical Americana, a bibliography of works on scientific invention, technology, and invention published prior to 1826, along with the index card file used in compiling the work.