|Description:||This 1952 drawing depicted an historical drawing provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH), detailing the design of a Detrex Degreaser™, Model IDCR-700, which was used to remove grease from “coil steel”, introduced during the manufacture process. The grease, used as a rust prevention measure, must be removed before parts are painted and assembled. The machine used to degrease the parts consists of a large, square vat with electrical coils on the bottom. The tank was filled with liquid trichloroethane, a halogenated hydrocarbon (HHC), which was heated, creating a vapor that removed grease from suspended steel parts. HHCs are a cardiovascular, or blood toxicant. In the 1940s and 1950s, the Industrial Hygiene Division (IHD) investigated hazards associated with many types of manufacturing activities. This design was an example of a measure meant to improve workplace safety by keeping vapors from escaping.|
The NIOSH Historic Photo Collection began as the “picture file” of the Industrial Hygiene Division of the U.S. Public Health Service (USPHS), c. 1930-1960. It is a unique collection of mid-20th Century images of American workers and workplaces and documents occupational safety and health research of that era. The collection consists of approximately 1,000 original photographs and schematic drawings.