Schulmerich Electronics Inc; Sellersville, PA. Schulmerich makes electronic carillons, since 1940. (schulmerichbells.com)

From the Schulmerichbells.com website:
Schulmerich is the world's largest producer of carillons and handbells, and is one of only a handful of handbell manufacturers in the world. Founded in 1935 by George Schulmerich, the company managed to weather the depression when luxury items such as bells were not considered essential even for a church. The purchase of electronic carillons by the College Avenue Methodist Church in West Somerville, MA, and Father Flanagan's Boys Town in Nebraska helped the company establish a national reputation.

As the installation of carillons spread throughout most of the United States, Schulmerich expanded into a former shirt manufacturing plant in Sellersville, PA in 1943. During this time, the installation of the company's first 61-note instrument was completed in the prestigious Grand Court of John Wanamaker in Philadelphia.

The company moved to its current Sellersville location in 1950. Schulmerich employs its own factory Service Engineers for service on cast bells and electronic carillons and also utilizes a sales force, consisting of music professionals in North America, Canada, and many other areas of the world.

Schulmerich is the oldest existing handbell manufacturer in the United States, entering the field in 1962 with a 25-bell prototype set. Many design improvements and patents later, Schulmerich has manufactured well over a million handbells, spanning over a 7-octave range (85 notes). A 25-bell set of Schulmerich Handbells is now a part of the collection of 2,000 American and European instruments in the Division of Musical Instruments at the Smithsonian's National Museum of American History.

Schulmerich began manufacturing MelodyChime^® Instruments in September 1998 and now offers 5 complete octaves. MelodyChime^® Instruments have less complex harmonics and are generally easier to ring than handbells. They are also a fraction of the price of handbells. They may be used for younger and older ringers who have difficulty with the weight of handbells. The playing of MelodyChime^® Instruments also makes a wonderful compliment to the sound of handbells.