J.C. Deagan, Inc.  J.C. Deagan, Inc. is a former musical instrument manufacturing company that developed and produced instruments from the late 19th to the mid-20th century. The company was founded in 1880 by John Calhoun Deagan and initially manufactured glockenspiels (orchestra bells). It was noted for its development of the xylophone, vibraharp (vibraphone), organ chimes, aluminum chimes, aluminum harp, Swiss handbells, the marimba, and orchestra bells. Church bells were revolutionized by Deagan through his design of tubular bells, and the NBC chimes were his creation. Its former headquarters, the tower of which still bears the company name, is a landmark in the Ravenswood neighborhood of Chicago, Illinois. Since 1984, Deagan is a brand owned by Yamaha, which distributes and sells products with the Deagan name. The company was founded by John Calhoun Deagan (1853–1934), a professional clarinetist, in 1880. The J.C. Deagan company originally headquartered in St. Louis, Missouri, until it moved to Chicago, Illinois, in early 20th century. Deagan was unsatisfied with the intonation of the glockenspiels used in theater orchestras –which he had performed with– and he went on experimenting with the acoustics and tuning of the instrument. As a result of theses experiments, Deagan developed the first "scientifically tuned" glockenspiel. "On the Sensations of Tone" by German physician and physicist Hermann von Helmholtz served as strong inspiration for Deagan's advances. In 1978 the Deagan company was sold to Slingerland Drum Company, which added the Deagan instruments to its line of products. Slingerland then sold the Deagan company to the "Sanlar Corporation" –a corporation set up by Sligerland accountant Larry Gasp and his wife Sandra– in 1984. Meanwhile, the Deagan division of Slingerland was sold to Yamaha. A 25 tubular bell set by Deagan is still in daily use at St. John Cantius Church of Chicago, using its original player rolls. This tubular set was originally at Laureldale Cemetery in Reading, Pennsylvania and relocated to St. John Cantius in 1999. The 97-bell carillon at the Stephen Foster Folk Culture Center State Park near White Springs, Florida, is one of the largest musical instruments ever produced in the Western Hemisphere, and the world’s largest tubular carillon in number of bells.