Hi,
I'm currently restoring an old DeVry Portable 35mm projector, very similar to this model http://filmprojectors.eu/images/PortableMovieProjectorDeVRYPORTABLEC90.jpg
However there are some very old electrical components and I'm struggling to figure what exactly a specific piece is. See attached.
There are two of these in the projector. One of them intercepts the bulb, the other one, the motor. The skinny pole at one end can be pulled up and down causing the disc to slide making contact on each little square. I have a feeling one might control the brightness of the bulb and the other one the speed of the motor (framerate). Any ideas?!
Thanks in advance,
Michael