Davis of Derby Electric Signalling Bell

Davis of Derby Electric Signalling Bell

Davis of Derby Electric Signalling Bell.
Davis of Derby electric signalling bell, called “The Bluebell” used for shaft and haulage engine signalling. Size 15″ x 6″ inches.

Most, if not all of these bells had a small light bulb in a glass housing fixed into the centre of the metal plate at the top of the bell, to visually aid in the signalling.  

 

 

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