Examples of
Holtzer-Cabot Electric Motors

(Photograph courtesy of Art Reblitz)

Holtzer-Cabot motor #318920, installed in a 1921 Seeburg G Orchestrion. Many smaller (thinner) motors of similar appearance were used in smaller coin pianos and orchestrions. An easily recognizable characteristic of many early Holtzer-Cabot piano motors is the pair of large, flat concentric brass rings on the armature, visible through the openings in the end bell. A pair of carbon brushes conducts current through these rings to the centrifugal starting switch mounted on the armature. When the starting switch flies open at a certain speed, it disconnects current to the starting winding.

(Photograph courtesy of Art Reblitz)

Nameplate on the above pictured Holtzer-Cabot motor #318920.

(Photograph courtesy of Dana Johnson)

Late style Holtzer-Cabot motor installed in a Link Style 2E cabinet piano.