Alfred Carlton Gilbert was an Olympic Gold Medalist, graduate of Yale University, and inventor. He invented the erector set and sold his toys through his company, the A.C. Gilbert Company.
Websites:
Play and Playground Encyclopedia (Challenge)
ConnecticutHistory.org
Alfred Carlton Gilbert: Inventor of the Erector Set- Today in History (Challenge)
Erector Set Patented (Challenge)
Heart Pump out of an Erector Set- Who Knew? (Challenge)
Magazines:
Connecticut Studies Weekly: Week 22 (page 2)