60 lines Nipkow disc machine with synchronous motor. Made by Roger DUPOUY . Sold July 2011.
On this machine, the Nipkow scanning disc is driven by a US synchronous motor, a vintage TELETYPE made by General Electric in Chicago (Illinois) around 1935.
This motor designed for the 60Hz/110 volts US power, tends to overheat on a 50Hz/110 volts power.
So, a cooling fan has been put at the back to protect the motor, even if the vintage design may suffer from this.
Color experiment as viewed on the machine
Image of Bette Davis taken from the disk (movie:Of Human Bondage 1934.)