Candle Snuffers

Today, a candle snuffer is a device used to extinguish burning candles, originally called a candle snuffer was also known as an "extinguisher" or "doubter".
This is done by smothering the flame with a small metal bell or cup fixed at right angles to a long handle, depriving the flame of oxygen or snuffing it out. Using a candle snuffer is the best way to put a candle out avoiding blowing hot wax from the flame pool. Candle snuffers are commonly used in churches and forming quite often, to show the ritual taking place has ended.
Older references are made a scissor like tool used to trim the wick of a candle. With skill, this could be done without extinguishing the flame and a small receptacle catches the trimmed bit of wick, before it fell in the wax pool and started a secondary flame 
This tool has been rendered obsolete by the invention of self-snuffing wicks, which curl out of the flame when charred. This allows excess wick to burn away, preventing the wick from becoming too long. Other wicks have steel wire centres which absorbs heat to become hotter than a normal wick, vapourising both the cotton wick material and the fine wire