Most People Guess This Wrong

Source: Reddit
In addition to being a useful item, old fireplace sets usually have at least one oddball in the set that will make people stop and stare. The poker is easily recognizable. Tongs are obvious as well. The broom and shovel usually make sense right away. But then there is that one other tool with the sliding top, and that is when the guessing begins. That oddball tool is a fireplace coal banker.
What Does a Fireplace Coal Banker Do?
A fireplace coal banker was used to collect live coals from the fireplace at night. After collecting the embers into the coal banker, the sliding cover would be closed to cut down on airflow and allow the coals to survive until the next morning. At which time, the coal banker could be opened and the live coals could be used to restart the fireplace instead of starting a new one.
As a result, it became a very useful tool of the hearth. It was designed specifically for that single task of holding and preserving live coals. Not ash, nor logs, nor sweeping the floor. Just that single job of preserving heat.

Why It Was Important
Although that single task seems simple, it does tell us a great deal about how people used to live. To the early settlers, a fireplace was much more than just a place to sit near on a cold winter’s night. A fireplace needed to be maintained, protected, and coordinated. The process of building a fire from scratch each morning was a laborious process and conserving some of the live coals from the previous day was a big timesaver.
The fireplace coal banker was a tool that made this process much simpler. It saved time, and it saved energy, and it even provided the next day’s fire with a “head-start”.
How the Fireplace Coal Banker Was Designed
Once you understand the purpose of the fireplace coal banker, the design is self-explanatory. The long metal handle allowed the tool to hang conveniently with the rest of the fireplace set. The small metal chamber held the live coals. The sliding top provided protection for the coals and controlled airflow to preserve them.
Prior to understanding the purpose of the tool, the tool appears mysterious. Once understood, however, the design seems logical. This is true of many antiques. Many antiques appear illogical prior to their intended use becoming clear.

Why the Fireplace Coal Banker Is Special Today
Today, the fireplace coal banker stands out because today few people can appreciate the routine that made it necessary. Early in history, someone would have tended to the fire one final time before going to bed, gathered the live coals, and stored them for morning. It represented that practice in a practical and straightforward manner.
Also, itr adds character to a fireplace set. While all the tools in the set are familiar, the fireplace coal banker is the one with the story. It represents the fact that past generations found ways to create clever and efficient means to accomplish their everyday tasks.