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I have a A/F Pre-War what I believe is a 3322 or 3323 with a bell. The bell does not work but if I apply power directly to the solenoid it works. I also noticed that inside the frame of the motor is a electrical pickup for the bell but no cam to actuate it. How does this bell get power to operate/how does it work and where can I buy parts? I also need a new collector.

 

 

Thanks,

 

Ed

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Hi Ed,

 

The driver on the left side of your picture should have a pin protruding from the rear (motor side). That pin engages the brightly colored cam behind it (the thing that looks sort of like a 5 sided Maltese cross) and rotates it one segment every revolution of the driver. The cam rotates a shaft that should have a contact that closes the circuit for the bell (probably the ground side) I hope this helps.

 

Roland

Hi Ed,

 

The cam is in your picture, it is the silver thing right behind the driver on the left. As the driver rotates it should engage one of the slots on the "cam" and move it one segment. The shaft that holds that "cam" in place should brush against a contact inside as it rotates completing the ground to the bell making it turn on and off.

 

Roland

The mechanism is known as a 'Geneva' movement (like what clocks use) the cam movement operates a make and break cam lobe on it's own separate axle inside the motor frame and grounds the bell coil. The cam lobe is of die cast metal and has usually disintegrated by now. A new one can be machined in brass if you really want to go through the trouble, but replacing it is also a very tough job, as you have to install it between the motor sideplates.

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