Monday 27 January 2014

Repeater Bell - During Refurbishment

I thought I'd show you what the the Repeater Bell mechanism is made up of, what components are used and what material they're made from.

Plan view of the 6 components

Side on view


The main item is the Y Frame, a cast iron part with 3 pillars rivetted to the frame; 2 of the pillars are mild steel the other one is brass.  The large brass spigot is there to act as a bump stop to restrict the travel of both the Clapper and Trigger Casting. The 2 steel pillars are dual purpose spring locators and pivot points for Trigger Casting and Clapper.  The springs slide over the pivot and fit on the lower square section followed by Trigger Casting or Clapper, these are fixed by split pin.  The last item is a brass Cable Interface, this pivots on the end of the Trigger Casting whilst being pulled up by the cable coming from the belfry.

Assembled Repeater Bell Mechanism
The fully assembled mechanism (without Bell)  There's a rubber ring fitted to the Brass Stop, I'm not sure if rubber would have been used on the original but this appears to work fine so far.  The rubber is dual purpose in that it stops metal to metal contact of both Clapper and Trigger and acts as a spacer to restrict the travel of those parts, allowing the systems to re-arm faster after striking.

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