Automatic Candle Extinguisher

Materials: Steel.
Dimensions: N/A.
Place of Origin: Britain.
Date: 18th century.
Maker: Unknown.
Present Location: private collection.

Explanation:

Automatic extinguishers, devices that extinguish a candle at a pre-determined time, are rare survivors. This example fits onto the candle at the desired point below the wick and is held in place by an adjustable clasp. When the candle burns down to that point, the cone is released to drop over the flame, extinguishing it.