[3][4] The tower of the former headquarters, still bearing the company name, is a landmark in the Ravenswood neighborhood of Chicago, Illinois.

The J. C. Deagan company originally headquartered in St. Louis, Missouri, until it moved to Chicago, Illinois, in the early 20th century.

On the Sensations of Tone by German physician and physicist Hermann von Helmholtz was a strong influence on Deagan's advances.

[11][12] A 25 tubular bell set by Deagan is still in daily use at St. John Cantius Church of Chicago, using its original player rolls.

[14] Deagan craftsmen required more than a year to build the huge set of bells, perhaps the greatest single manufacturing project in the firm's 78-year history.