A "dip" was a slang name of the time for a candle. In those days candles were created by "dipping" wicks in to wax (for the more expensive versions) or cold animal fat for the cheaper version - This dipping required continual dipping in to the melted wax/fat and allowed to cool to become hard. Then the shape of a candle was formed.
It was Belle
Ebenezer
Belle
Fezzwigg
Scrooge came from London
Scrooges housekeeper
Bah....humbug
His nephew
Jacob Marley
Mr Fizzywigg
The ghost of Christmas present repeats Scrooges retort of "are there no prisons, are there no work houses"
A dipper would dip dip as much as it want if a dipper would do dip.