Padlock research, Armour Research Foundation, Illinois Institute of Technology, Chicago, Illinois, ca. 1950s Armour Research Foundation (U.S.) Padlocks Materials--Testing Materials testing laboratories From the attached caption: "Wearing out the tumblers in padlocks is part of an investigation undertaken at Armour Research Foundation of Illinois Institute of Technology to improve the service of combination-type padlock parts. David Horwitz, associate research engineer, works on wheel that subjects tumblers to repeated rotations which can be translated into years of actual service. William T. Savage, supervisor of materials engineering, (left) is a specialist in materials utilization." Photographer unknown. Date of photograph is unknown. Date range listed is approximate. 1950-1959 Still image Black and white photograph image/tiff islandora:1004681 0360401-I3-11-002 http://hdl.handle.net/10560/islandora:1004681 Office of Communications and Marketing photographs, 1905-1999 Illinois Tech Libraries Illinois Institute of Technology en Chicago (Ill.) In Copyright http://rightsstatements.org/vocab/InC/1.0/