Single stroke mechanism from single stroke bell now acting like a vibrating bell mechanism

Fire Alarm General Discussion
1

Darned if I can figure out why, but the single stroke mechanism I took from an Autocall 10" bell began acting like a vibrating bell when I installed it in a Autocall 6" bell…

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It works quite well.

I got two Pyrotronics 6" 120 volt bells, and one I used it’s mechanism to restore a Autocall 4" bell; the single stroke mechanism came from a 10" Autocall 10" single stroke bell.

It’s odd to me, but I’m happy.

The mechanism has what looks like a diode on one side of the mechanism to allow supervision.

Can anybody guess why the single stroke mechanism would behave like I described? All I can say is as long as it keeps working well, I’ll use it that way.

Thanks, Ed Burnett

BTW: The 6" Pyrotronics bell (1 of 2) is at the left of my picture.

2

I’ll post some photos later of the inside of one of the Pyrotronics bells.

Ed Burnett

3

Here are more photos of my Pyrotronics 6" bells showing the internals of one with the diode.

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4

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5

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Please ignore the extra picture of the bell internals, it was added in error.

Ed Burnett

6

I’ve determined why the single stroke mechanism was acting like a vibrating mechanism…

It was so close that the striker/mechanism would vibrate producing a lower sounding ring.

It can still function as a single stroke mechanism.

Ed Burnett