Watch a Video of the Feedscrew Sonora in operation
The second style of Sonora phonograph is illustrated here. The tone arm featured linear tracking powered by a feedscrew. This design was found to be in violation of the basic Victor patents, and sales were prohibited. Consequently these feedscrew Sonora phonographs are rarely found.
Watch a Video of the Feedscrew Sonora in operation
Watch a Video of the Feedscrew Sonora in operation